TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI...

52
User Manual TI Power Electronics Board for NI ELVIS III Set Up and Configuration

Transcript of TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI...

Page 1: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

User Manual TI Power Electronics Board for NI ELVIS III

Set Up and Configuration

Page 2: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

Contents 1. Safety Information...................................................................................................................................... 4

2. Introduction ................................................................................................................................................. 5

2.1 TI Power Electronics Board for NI ELVIS III .................................................................................. 5

2.2 Discrete Linear Section ...................................................................................................................... 6

2.3 Discrete Buck Section ........................................................................................................................ 7

2.4 DC-AC Inverter Section ...................................................................................................................... 8

2.5 AC-DC Rectifier Section ..................................................................................................................... 9

2.6 TI Power Electronics Board connection to NI ELVIS III ........................................................... 10

3. Discrete Linear Section .......................................................................................................................... 13

3.1 Architecture ......................................................................................................................................... 13

3.2 Main Components .............................................................................................................................. 16

3.3 Jumpers ................................................................................................................................................ 18

3.4 Tests Points ......................................................................................................................................... 20

3.5 Status LEDs ......................................................................................................................................... 22

4. Discrete Buck Section ............................................................................................................................ 23

4.1 Architecture ......................................................................................................................................... 23

4.2 Main Components .............................................................................................................................. 26

4.3 Jumpers ................................................................................................................................................ 28

4.4 Tests Points ......................................................................................................................................... 30

4.5 Status LEDs ......................................................................................................................................... 32

5. DC-AC Section .......................................................................................................................................... 33

5.1 Architecture ......................................................................................................................................... 33

5.2 Main Components .............................................................................................................................. 36

5.3 Jumpers ................................................................................................................................................ 38

5.4 Tests Points ......................................................................................................................................... 40

5.5 Status LED ........................................................................................................................................... 42

6. AC-DC Section .......................................................................................................................................... 43

6.1 Architecture ......................................................................................................................................... 43

6.2 Main Components .............................................................................................................................. 45

6.3 Jumpers ................................................................................................................................................ 47

6.4 Tests Points ......................................................................................................................................... 49

6.5 Status LED ........................................................................................................................................... 51

7. Environmental ........................................................................................................................................... 52

Page 3: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,
Page 4: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

1. Safety Information

The following symbols and definitions are interchangeably used throughout the User

Manual

Table 1.1 Symbols

Symbol Description

Caution: consult documentation for additional information

Caution: high temperature, do not touch.

Power ON NI ELVIS III unit

Power OFF NI ELVIS III unit

Page 5: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

2. Introduction

2.1 TI Power Electronics Board for NI ELVIS III

The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1, is an add-on

application board for the NI Educational Laboratory Virtual Instrumentation Suite III (NI

ELVIS III). It provides a hands-on experience for learning power electronics and power

management.

Figure 2.1 TI Power Electronics Board for NI ELVIS III

This equipment is designed to be used for educational and research purposes and is not intended for use by the general public. The user is responsible to ensure that the equipment will be used by technically qualified personnel only.

The board is comprised of four independent sections that are the basic building blocks for

understanding the function of components used in power electronic systems and relevant

applications. The four sections incorporate devices and circuits demonstrating:

• Linear Regulator operation (Discrete Linear Section)

• Buck Regulator operation (Discrete Buck Section)

• Pulse-Width Modulated Inverter, Square-Wave Inverter and High-Frequency

Transformer operation (DC-AC Inverter Section)

Page 6: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

• Diode-Bridge Rectifier and Post-Regulator operation (AC-DC Rectifier Section)

2.2 Discrete Linear Section

The Discrete Linear Section is shown in Figure 2.2. It is comprised of an Integrated Buck

sub-section and a Discrete Linear sub-section.

Figure 2.2 Discrete Linear Section of TI Power Electronics Board for NI ELVIS III

The Discrete Linear sub-section is comprised of the fundamental building blocks of a linear

regulator: MOSFET pass device, output capacitor, error amplifier, MOSFET gate driver.

The Integrated Buck sub-section operates as an adjustable static and dynamic voltage

source for this discrete linear sub-section. Jumpers on board enable testing with different

system configurations. Current sensors facilitate current measurements using standard

voltage probes. Test points on board allow measurement of voltage and currents needed to

understand the operation of linear regulators.

The Discrete Linear Section is used to perform hands-on experiments investigating:

• linear regulator in DC open loop operation

• linear regulator in AC open loop operation

• error amplifier operation

• linear regulator in closed loop operation

Page 7: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

Instructions to perform the experiments on the Discrete Linear Section are provided in the

TI Power Electronics Board for NI ELVIS III Laboratory Manual available at the link

http://www.ni.com/en-us/support/model.ti-power-electronics-board-for-ni-elvis-iii.html.

2.3 Discrete Buck Section

The Discrete Buck Section is shown in Figure 2.3. It is comprised of a Discrete Buck sub-

section and an Integrated Linear sub-section.

Figure 2.3 Discrete Buck Section of TI Power Electronics Board for NI ELVIS III

The Discrete Buck sub-section is comprised of the fundamental building blocks of a buck

regulator: MOSFET Half-Bridge, output L-C filter, error amplifier, PWM modulator, and

MOSFETs gate driver. The Integrated Linear sub-section operates as an adjustable static

and dynamic load for this discrete Buck sub-section. Jumpers on board enable testing with

different system configurations. Current sensors facilitate current measurements using

standard voltage probes. Test points on board allow measurement of voltage and currents

needed to understand the operation of buck regulators.

The Discrete Buck Section is used to perform hands-on experiments investigating:

• buck regulator in DC open loop operation

• buck regulator in AC open loop operation

• buck regulator in continuous mode and discontinuous mode operation

• buck regulator in closed loop operation

Page 8: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

Instructions to perform the experiments on the Discrete Buck Section are provided in the TI

Power Electronics Board for NI ELVIS III Laboratory Manual available at the link

http://www.ni.com/en-us/support/model.ti-power-electronics-board-for-ni-elvis-iii.html.

2.4 DC-AC Inverter Section

The DC-AC section is shown in Figure 2.4.

Figure 2.4 DC-AC Section of TI Power Electronics Board for NI ELVIS III

The DC-AC Inverter Section is comprised of the fundamental building blocks which allow

understanding the Pulse-Width Modulated and Square-Wave Modulated inverters functions:

MOSFET Full-Bridge, output L-C filter, PWM/SWM modulator, MOSFETs gate driver. The

board also includes a high-frequency transformer, which can be operated in step-up and

step-down mode. Jumpers on board enable testing with different system configurations.

Current sensors facilitate current measurements using standard voltage probes. Test points

on board allow measurement of voltage and currents needed to understand the operation of

DC-AC inverters.

The DC-AC Inverter Section is used to perform hands-on experiments investigating:

• inverters in PWM mode operation

• inverters in SWM mode operation

• high-frequency transformer in step-up and step-down operation

Page 9: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

Instructions to perform the experiments on the DC-AC Inverter Section are provided in the

TI Power Electronics Board for NI ELVIS III Laboratory Manual available at the link

http://www.ni.com/en-us/support/model.ti-power-electronics-board-for-ni-elvis-iii.html.

2.5 AC-DC Rectifier Section

The AC-DC Rectifier Section is shown in Figure 2.5.

Figure 2.5 AC-DC Rectifier Section of TI Power Electronics Board for NI ELVIS III

The AC-DC Rectifier section is comprised of the fundamental building blocks which allow

understanding rectifiers and post-regulators: Diode Full-Bridge, output capacitor, integrated

buck regulator, integrated linear regulator. Jumpers on board enable testing with different

system configurations. Current sensors facilitate current measurements using standard

voltage probes. Test points on board allow measurement of voltage and currents needed to

understand the operation of AC-DC rectifiers.

The AC-DC Rectifier Section is used to perform hands-on experiments investigating:

• rectifiers in steady-state operation

• post-regulators operation

Instructions to perform the experiments on the AC-DC Rectifier Section are provided in the

TI Power Electronics Board for NI ELVIS III Laboratory Manual available at the link

http://www.ni.com/en-us/support/model.ti-power-electronics-board-for-ni-elvis-iii.html.

Page 10: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

2.6 TI Power Electronics Board connection to NI ELVIS III

The TI Power Electronics Board is designed for docking on the NI ELVIS III unit, as shown

in Figure 2.6.

Figure 2.6 TI Power Electronics Board docked on NI ELVIS III unit

The +15V voltage output of the NI ELVIS III Variable Power Supply (VPS) can be

connected to the TI Power Electronics Board by means of red/black banana-to-banana

power cables, as shown in Figure 2.6.

The outputs of the NI ELVIS III Function Generator (FG) channels CH-1 and CH-2 can be

connected to the TI Power Electronics Board by means of two BNC-to-BNC coaxial cables,

as shown in Figure 2.6.

The NI ELVIS III VPS voltage is distributed to the four Sections of the TI Power Electronics

Board by means of six integrated power switches. The ON/OFF status of each power

switch is controlled by a dedicated NI ELVIS III Digital I/O (DIO) signal, as shown in Figure

2.7, and summarized in Table 2.1.

The NI ELVIS III FG CH-1 and CH-2 signals are distributed to the four Sections of the TI

Power Electronics Board and enabled via an analog multiplexer. The status of the

multiplexer is controlled by three dedicated NI ELVIS III Digital DIO signals, as shown in

Figure 2.7, and summarized in Table 2.3.

Green LEDs D13, D14, D15, D16, D17 and D18 are ON when the corresponding sections

of the TI Power Electronics Board are powered, as listed in Table 2.2.

Page 11: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

Figure 2.7 NI ELVIS III FG CH-1 and CH-2 signals distribution to TI Power Electronics Board Sections

(LED D13 ON)

(LED D17 ON)

(LED D14 ON)

(LED D18 ON)

(LED D15 ON)

(LED D16 ON)

Page 12: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

designator description

VPS_DLx_en NI ELVIS III VPS connection to Integrated Buck sub-section of the Discrete Linear Section: 1 = Enable, 0 = Disable

VPS_DLy_en NI ELVIS III VPS connection to Discrete Linear sub-section of the Discrete Linear Section: 1 = Enable, 0 = Disable

VPS_DBx_en NI ELVIS III VPS connection to Discrete Buck sub-section of the Discrete Buck Section: 1 = Enable, 0 = Disable

VPS_DBy_en NI ELVIS III VPS connection to Integrated Linear sub-section of the Discrete Buck Section: 1 = Enable, 0 = Disable

VPS_DC_en NI ELVIS III VPS connection to DC-AC Section: 1 = Enable, 0 = Disable

VPS_AC_en NI ELVIS III VPS connection to AC-DC Section: 1 = Enable, 0 = Disable

Table 2.1 NI ELVIS III DIO signals for VPS voltage distribution nomenclature

designator description

D13 NI ELVIS III VPS connection to Integrated Buck sub-section of the Discrete Linear Section: ON = connected, OFF = disconnected

D14 NI ELVIS III VPS connection to Discrete Buck sub-section of the Discrete Linear Section: ON = connected, OFF = disconnected

D15 NI ELVIS III VPS connection to DC-AC Inverter Section: ON = connected, OFF = disconnected

D16 NI ELVIS III VPS connection to AC-DC Rectifier Section: ON = connected, OFF = disconnected

D17 NI ELVIS III VPS connection to Discrete Linear sub-section of the Discrete Linear Section: ON = connected, OFF = disconnected

D18 NI ELVIS III VPS connection to Integrated Linear sub-section of the Discrete Buck Section: ON = connected, OFF = disconnected

Table 2.2 Power ON status LEDs nomenclature

designator description

FGEN_EN_G NI ELVIS III FG signals connection to the four Sections of the TI Power Electronics Board for NI ELVIS III: 1 = Enable, 0 = Disable

FGENS0 FGENS1

NI ELVIS III FG connection to the four Sections of the TI Power Electronics Board for NI ELVIS III

FGENS0 FGENS1 NI ELVIS III FG CH-1 and CH2 connected to:

0 0 Discrete Linear Section

1 0 Discrete Buck Section

0 1 DC-AC Section

1 1 AC-DC Section

Table 2.3 NI ELVIS III DIO signals for VPS voltage distribution nomenclature

The setup of NI ELVIS III DIO signals is handled by the TI Power Electronics Application

Board Utility, available in the Quick Start folder on your hard drive. The TI Power

Electronics Application Board Utility ensures the setting of the appropriate DIO signals

configuration for each experiment to be performed with the TI Power Electronics Board for

NI ELVIS III.

Page 13: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

3. Discrete Linear Section

3.1 Architecture

The Discrete Linear section of TI Power Electronics Board for NI ELVIS III, shown in Figure

3.1, is comprised of two sub-sections:

• Integrated Buck

• Discrete Linear

Figure 3.1 DC-DC Discrete Linear Regulator Section of TI Power Electronics Board for NI ELVIS III

The Discrete Linear Section operates with NI ELVIS III Variable Power Supply voltage between 4V minimum and 8V maximum. Do not use voltages out of this range, unless explicitly indicated in the Power Electronics Laboratory Manual of TI Power Electronics Board for NI ELVIS III.

DO NOT touch the integrated and discrete components on board while the Discrete Linear Section is in operation, because they can be hot.

Page 14: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

The schematic given in Figure 3.2 illustrates the main functional blocks of the Discrete

Linear Section, and how they interact among each other and with NI ELVIS III.

Figure 3.2 Interaction among Discrete Linear Section main components and NI ELVIS III

The main functional blocks of the Discrete Linear Section are:

• an eFuse (U46), featuring the overvoltage and overcurrent protection function

• a jumper (J34), featuring the eFuse pass/bypass configuration function

• an N-channel MOSFET (Q24), featuring the pass device function

• two capacitors (C81, C82), featuring the filter function

• a resistor (R140), featuring the Discrete Linear Regulator fixed load function

• an error amplifier (U51), featuring the feedback control function

• a voltage reference (U52), featuring the error amplifier reference function

• an Integrated Buck Regulator (U57), featuring the adjustable static and dynamic

voltage source function for the Discrete Linear Regulator

• two resistors (R157,R158), featuring the Integrated Buck Regulator fixed load

function

• a jumper (J17), featuring the Integrated Buck Regulator load configuration function

• five Single-Pole-Double-Throw (SPDT) switches (U44+U47, U48, U53, U54, U60),

featuring the Discrete Linear Regulator configuration function

Page 15: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

The SPDTs U44+U47, U48, U53, U54, and U60 are controlled by NI ELVIS III digital I/O

signals S1_DL, S2_DL, S3_DL, S4_DL, DL_REF. The setup of NI ELVIS III digital I/O

signals is handled by the TI Power Electronics Application Board Utility, available in the

Quick Start folder on your hard drive. The TI Power Electronics Application Board

Utility ensures the setting of the appropriate SPDT configuration for each experiment to be

performed with the Discrete Linear Section of the TI Power Electronics Board for NI ELVIS

III.

The SPDT U44+U47 controlled by NI ELVIS III digital I/O signal S1_DL allows connecting

the power input of the Discrete Linear sub-section either to the Integrated Buck sub-section,

or to the NI ELVIS III Variable Power Supply (VPS). The Integrated Buck sub-section can

operate as an adjustable static or dynamic voltage source for the Discrete Linear sub-

section.

The SPDT U48 controlled by NI ELVIS III digital I/O signal S2_DL allows connecting the

input of the error amplifier U51 either to the output voltage of the linear regulator, or to

ground.

The SPDTs U53 and U54 controlled by NI ELVIS III digital I/O signals S4_DL and S3_DL,

respectively, allow connecting the gate voltage of the MOSFET pass device Q24 of the

linear regulator either to the output of the error amplifier U51, or to the NI ELVIS III Function

Generator (FG) CH-2.

The SPDT U60 controlled by NI ELVIS III digital I/O signal DL_REF allows connecting the

reference voltage input of the error amplifier U51 either to the fixed voltage reference

generator U52, or to the NI ELVIS III Function Generator (FG) CH-1.

The jumper J17 allows connecting the power output of the Integrated Buck Regulator U57

either to the power input of the Discrete Linear regulator, or to the fixed load resistors R157

and R158.

The Integrated Buck Regulator U57 is powered by the NI ELVIS III Variable Power Supply

(VPS) through a power switch, as illustrated in the Introduction.

The outputs of the NI ELVIS III Function Generator (FG) channels CH-1 and CH-2 are

connected to the Discrete Linear Regulator and Integrated Buck Regulator by means of an

analog multiplexer, as illustrated in the Introduction.

Page 16: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

3.2 Main Components

The main components comprising the Discrete Linear Section are labeled in Figure 3.3 and

are descripted in Table 3.1.

Figure 3.3 Discrete Linear Section main discrete and integrated components

U62

U55

U57

U56

U61

Q26

Q25

U49

U54

Q24

U48

U51

U53

U56 U48 U45 U44 U47

U63 U59 U50 U52 U60

L7 U66

Page 17: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

designator part code description

L7 LPS6225-473MLB Inductor, Shielded Drum Core, Ferrite, 47 µH, 0.8 A, 0.36 ohm https://www.coilcraft.com/pdfs/lps6225.pdf

Q24 CSD15380F3 MOSFET, N-CH, 20 V, 0.5 A http://www.ti.com/lit/gpn/CSD15380F3

Q25, Q26 CSD17571Q2 MOSFET, N-CH, 30 V, 22 A http://www.ti.com/lit/gpn/CSD17571Q2

U44, U47, U62

TPS22810DBVR

2.7-18-V, 2-A, 79-mΩ On-Resistance Load Switch with Thermal Protection http://www.ti.com/lit/gpn/TPS22810

U45 SN74LVC1G04DBVR Single Inverter Gate http://www.ti.com/lit/gpn/SN74LVC1G04

U46 TPS24750RUVR 18V, 12A, 3mΩ eFuse http://www.ti.com/lit/gpn/TPS24750

U48, U53, U54, U60, U63

TS5A9411DCKR 10-Ohm SPDT Analog Switch http://www.ti.com/lit/gpn/TS5A9411

U49, U58, U61

TMP235DCK

Low-Power, High-Accuracy Analog Output Temperature Sensor http://www.ti.com/lit/gpn/TMP235

U50, U55, U56

INA139NA/3K

36-V, High-Side, High-Speed, Current Output Current Shunt Monitor http://www.ti.com/lit/gpn/INA139

U51 OPA835IDBVR

Ultra Low Power, Rail-to-Rail Out, Negative Rail In, VFB Amplifier, 2.5 to 5.5 V http://www.ti.com/lit/gpn/OPA835

U52 LM4140ACM-1.0 Precision Micropower Low Dropout Voltage Reference http://www.ti.com/lit/gpn/LM4140

U57 TPS40303DRCR

3V to 20V Wide Input Synchronous Buck Controller for High Power Density, High Efficiency, 300kHz http://www.ti.com/lit/gpn/TPS40303

U59 TPS71501DCKR

Single Output LDO, 50 mA, Adjustable 1.2 to 15 V Output, 3 to 24 V Input http://www.ti.com/lit/gpn/TPS715

U65, U66 TPS22810DBVR

2.7-18-V, 2-A, 79-mΩ On-Resistance Load Switch with Thermal Protection http://www.ti.com/lit/gpn/TPS22810

Table 3.1 Discrete Linear Section main components nomenclature

Page 18: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

3.3 Jumpers

The jumpers comprising the Discrete Linear Section are labeled in Figure 3.4 and are

described in Table 3.2. The jumpers can be configured to perform experiments in this

section, under different DC and AC, open-loop and closed loop, operating conditions.

Figure 3.4 Discrete Linear Section jumpers

J59

J62

J17 J34 J58

J69

J68 J61 J60

Page 19: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

designator description

J34

short 1-2 = connects the Discrete Linear power input directly to ELVIS VPS,

short 2-3 = connects the Discrete Linear power input to ELVIS VPS through the e-

Fuse U46

J17

short TP148-TP163 = connects the Integrated Buck power output to the Discrete Linear power input

short TP148-TP163 = connects the Integrated Buck power output to R157 and R158 fixed load resistors

J58 short = connects the Discrete Linear input capacitors C83 and C84

J59 short = connects the Discrete Linear output capacitors C82

J60 short = connects the Discrete Linear error amplifier compensation components

R138 and C80

J61 short = sets the Discrete Linear nominal output voltage at 3.3V open = sets the Discrete Linear nominal output voltage at 2.5V

J62 short = connects the Discrete Linear error amplifier compensation components

R144 and C86

J68 short = sets the Integrated Buck output voltage at 5.0V

open = sets the Integrated Buck output voltage at 3.3V

J69 short = disables the Integrated Buck

open = enables the Integrated Buck

Table 3.2 Discrete Linear Section jumpers nomenclature

Page 20: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

3.4 Tests Points

The test points comprising the Discrete Linear Section are labeled in Figure 3.5 and are

described in Table 3.3. They allow performing the measurement of voltages, currents and

temperature in this section, under different DC and AC, open-loop and closed loop,

operating conditions.

Figure 3.5 Discrete Linear Section test points

TP130

TP128

TP131 TP121

TP132 TP113 TP117 TP119 TP114

TP129

TP147

TP136

TP127

TP123

TP124

TP149

TP144 TP135 TP145 TP133 TP112 TP139 TP134

TP142

TP116 TP126 TP122 TP118 TP141 TP120 TP143 TP140 TP115 TP138 TP137 TP125 TP146

Page 21: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

designator description

TP113 Discrete Linear regulator: input current monitor

TP114 Discrete Linear regulator: ambient temperature next to MOSFET Q24

TP115 Discrete Linear regulator: output current

TP117 Discrete Linear regulator: input voltage

TP118 Discrete Linear regulator: output voltage

TP121 Discrete Linear regulator: MOSFET Q24 gate voltage

TP122 Discrete Linear regulator: error amplifier OP-AMP inverting input

TP123 Discrete Linear regulator: error amplifier OP-AMP output

TP124 NI ELVIS III Function Generator CH-2

TP126 NI ELVIS III Function Generator CH-1

TP127 Discrete Linear regulator: error amplifier OP-AMP output

TP128 Integrated Buck regulator: input current

TP130 Integrated Buck regulator: input voltage

TP132 Integrated Buck regulator: output current

TP134 Integrated Buck regulator: high-side MOFET Q25 gate voltage

TP135 Integrated Buck regulator: switching node voltage

TP136 Integrated Buck regulator: output voltage

TP137 Integrated Buck regulator: loop gain measurement (together with TP136)

TP138 Integrated Buck regulator: control voltage

TP139 Integrated Buck regulator: low-side MOFET Q26 gate voltage

TP140 Integrated Buck regulator: feedback voltage

TP141 NI ELVIS III Function Generator CH-1

TP147 Integrated Buck regulator: ambient temperature next to high-side MOSFET

TP149 Integrated Buck regulator: ambient temperature next to low-side MOSFET

TP112, TP116, TP119, TP120, TP125, TP129, TP131, TP133, TP142, TP143, TP144, TP145, TP146

GND

Table 3.3 Discrete Linear Section test points nomenclature

Page 22: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

3.5 Status LEDs

The green LEDs D13 and D17 highlighted in Figure 3.6 turn ON when, respectively, the

Integrated Buck and the Discrete Linear sub-sections of the Discrete Linear Section are

powered.

Figure 3.6 Discrete Linear Section status LEDs

D13 D17

Page 23: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

4. Discrete Buck Section

4.1 Architecture

The Discrete Buck Section of TI Power Electronics Board for NI ELVIS III, shown in Figure

4.1, is comprised of two sub-sections:

• Discrete Buck

• Integrated Linear

Figure 4.1 DC-DC Discrete Buck Regulator Section of TI Power Electronics Board for NI ELVIS III

The Discrete Buck Section operates with NI ELVIS III Variable Power Supply voltage between 7V minimum and 12V maximum. Do not use voltages out of this range, unless explicitly indicated in the Power Electronics Laboratory Manual of TI Power Electronics Board for NI ELVIS III.

DO NOT touch the integrated and discrete components on board while the Discrete Buck Section is in operation, because they can be hot.

Page 24: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

The schematic given in Figure 4.2 illustrates the main functional blocks of the Discrete Buck

Section, and how they interact among each other and with NI ELVIS III.

Figure 4.2 Interaction among Discrete Buck Section components and NI ELVIS III

The main functional blocks of the Discrete Buck sub-section are:

• an N-channel MOSFET Half-Bridge (Q13+Q14), featuring the switch-mode function

• a resistor (R93), featuring the Half-Bridge fixed load function

• an L-C filter (L5+L6,C45+C46), featuring the switching filter function

• a resistor (R94), featuring the Discrete Buck Regulator fixed load function

• an Integrated Linear Regulator (U39), featuring the adjustable static and dynamic

load function for the Discrete Buck Regulator

• a resistor (R115), featuring the Integrated Linear Regulator fixed load function

• an error amplifier (U28), featuring the feedback control function

• a voltage reference (U29), featuring the error amplifier reference function

• a resistor (R102), featuring the error amplifier fixed load function

• a comparator (U30), featuring the PWM modulator function

• a resistor (R102), featuring the error amplifier fixed load function

• three Single-Pole-Double-Throw (SPDT) switches (U32, U33, U35), featuring the Discrete

Buck Regulator configuration function

• a jumper (J11), featuring the Half-Bridge load configuration function

• a jumper (J16), featuring the Discrete Buck Regulator load configuration function

Page 25: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

The SPDTs are controlled by NI ELVIS III digital I/O signals S4_DB, S5_DB, S6_DB. The

setup of NI ELVIS III digital I/O signals is handled by the TI Power Electronics

Application Board Utility, available in the Quick Start folder on your hard drive. The TI

Power Electronics Application Board Utility ensures the setting of the appropriate SPDT

configuration for each experiment to be performed with the Discrete Buck Section of the TI

Power Electronics Board for NI ELVIS III.

The SPDT U35 controlled by NI ELVIS III digital I/O signal S4_DB allows connecting the

input of the error amplifier U28 either to the output voltage of the buck regulator, or to

ground.

The SPDTs U33 and U32 controlled by NI ELVIS III digital I/O signals S5_DB and S6_DB,

respectively, allow connecting the positive input of the PWM modulator U30 either to the

output of the error amplifier U28, or to NI ELVIS III Function Generator (FG) CH-1.

The jumper J11 allows connecting the output voltage of the Half-Bridge either to the input of

the L-C filter, or to the fixed load resistor R93.

Page 26: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

4.2 Main Components

The main components comprising the Discrete Buck Section are labeled in Figure 4.3 and

are described in Table 4.1.

Figure 4.3 Discrete Buck Section main discrete and integrated components

U65

U31

U25

U27

U42

U41

Q13,Q14 L6 T7 U67 U38 U40

U33

U30 U39

L5 U26

U37 U32 U35 U34 U64

U29

U28

Page 27: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

designator part code description

L5 LPS6225-153MLB Inductor, Shielded Drum Core, Ferrite

15 µH, 1.2 A, 0.14

L6 LPS6225-333MLB Inductor, Shielded Drum Core, Ferrite

33 µH, 0.9 A, 0.26

Q13, Q14 CSD15380F3 MOSFET, N-CH, 20 V, 0.5 A http://www.ti.com/lit/gpn/CSD15380F3

T7 749251050 1:100 Transformer, 500 uH

U25, U26, U37

INA139NA/3K

36-V, High-Side, High-Speed, Current Output Current Shunt Monitor http://www.ti.com/lit/gpn/INA139

U27 TPS51601ADRBR Dual High-Efficiency Synchronous MOSFET Driver http://www.ti.com/lit/gpn/TPS51601A

U28 OPA835IDBVR Ultra Low Power, Rail-to-Rail Out, Negative Rail In, VFB Amplifier, 2.5 to 5.5 V http://www.ti.com/lit/gpn/OPA835

U29 LM4140ACM-1.0 Precision Micropower Low Dropout Voltage Reference http://www.ti.com/lit/gpn/LM4140

U30 TLV7011DPWR Micro-Power, Low-Voltage Comparator http://www.ti.com/lit/gpn/TLV7011

U31 TMP235DCK

Low-Power, High-Accuracy Analog Output Temperature Sensor http://www.ti.com/lit/gpn/TMP235

U32, U33, U35, U64

TS5A9411DCKR 10-Ohm SPDT Analog Switch http://www.ti.com/lit/gpn/TS5A9411

U34 TPS71501DCKR

Single Output LDO, 50 mA, Adjustable 1.2 to 15 V Output, 3 to 24 V Input http://www.ti.com/lit/gpn/TPS715

U38 TPS24750RUVR 18V, 12A, 3mΩ eFuse http://www.ti.com/lit/gpn/TPS24750

U39 TPS7A6201QKTTRQ1 Single Output Automotive LDO, 300 mA, Adjustable 2.5 to 7 V Output, 4 to 40 V Input http://www.ti.com/lit/gpn/TPS7A6201-Q1

U40, U42, U65, U67

TPS22810DBVR 2.7-18-V, 2-A, 79-mΩ, Load Switch with Thermal Protection http://www.ti.com/lit/gpn/TPS22810

U41 SN74LVC1G04DBVR Single Inverter Gate http://www.ti.com/lit/gpn/SN74LVC1G04

Table 4.1 Discrete Buck Section main components nomenclature

Page 28: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

4.3 Jumpers

The jumpers comprising the Discrete Buck Section are labeled in Figure 4.4 and are

described in Table 4.2. The jumpers can be configured to perform experiments in this

section, under different DC and AC, open-loop and closed loop, operating conditions.

Figure 4.4 Discrete Buck Section jumpers

J37 J16 J33

J46

J38

J48 J44 J47

J11 J39 J12

J41 J42

Page 29: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

designator description

J11

short TP156-TP158 = connects the Half-Bridge output switching voltage to the fixed

load resistor R93,

short TP156-TP153 = connects the Half-Bridge output switching voltage to the input

of the L-C filter

J12 short TP161-TP159 = connects the 10F ceramic capacitor C45 to the L-C filter

short TP161-TP160 = connects the 100F polymer capacitor C46 to the L-C filter

J16

short TP155-TP157 = connects the Discrete Buck output to the fixed load resistor

R94,

short TP155-TP154 = connects the Discrete Buck output to the Integrated Linear

power input

J33

short 1-2 = connects the Integrated Linear power input directly to ELVIS VPS,

short 2-3 = connects the Integrated Linear power input to ELVIS VPS through the

e-Fuse U38

J37

short 1-2 = connects the output reference voltage of the current sense transformer

T7 to ground, for separate measurement of AC inductor ripple current

short 2-3 = connects the output reference voltage of the current sense transformer

T7 to the positive output pole (test point TP79) of the current shunt

monitor U26, for measurement of the total inductor current (DC

component + AC ripple component)

J38 short = connects the Discrete Buck 10 F input capacitor C43

J39 short = bypasses the 33 H inductor L6

J41 short = connects the Discrete Buck regulator error amplifier compensation components R97 and C51

J42 short = connects the Discrete Buck regulator error amplifier compensation components R96 and C48

J44 short = sets the Discrete Buck regulator nominal output voltage at 5.0V open = sets the Discrete Buck regulator nominal output voltage at 3.3V

J46 short = Disable the Integrated Linear regulator

J47 short = connects the Integrated Linear regulator 10 F output capacitor C66

J48 short = sets the Integrated Linear regulator nominal output voltage at 3.3V open = sets the Integrated Linear regulator nominal output voltage at 2.5V

Table 4.2 Discrete Buck Section jumpers nomenclature

Page 30: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

4.4 Tests Points

The test points comprising the Discrete Buck Section are labeled in Figure 4.5 and are

described in Table 4.3. They allow performing the measurement of voltages, currents and

temperature in this section, under different DC and AC, open-loop and closed loop,

operating conditions.

Figure 4.5 Discrete Buck Section test points

TP83

TP76

TP78 TP84

TP90

TP87

TP107

TP77

TP105

TP101

TP109

TP88 TP82 TP79 TP104 TP85

TP99

TP91

TP110 TP108 TP102 TP86 TP89 TP103 TP100 TP98 TP106 TP93 TP95 TP92

TP96

TP94

Page 31: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

designator description

TP76 Discrete Buck regulator: input current monitor

TP78 Discrete Buck regulator: reference output voltage of current sense transformer T7

TP79 Discrete Buck regulator: output current monitor

TP82 Discrete Buck regulator: positive output voltage of current sense transformer T7

TP83 Discrete Buck regulator: input voltage

TP85 Discrete Buck regulator: high-side MOSFET Q13 gate voltage

TP86 Discrete Buck regulator: output voltage

TP87 Discrete Buck regulator: switching node voltage

TP88 Discrete Buck regulator: low-side MOSFET Q14 gate voltage

TP92 Discrete Buck regulator: loop gain measurement (together with TP86)

TP93 Discrete Buck regulator: error amplifier output voltage

TP94 NI ELVIS III Function Generator CH-1

TP95 Discrete Buck regulator: error amplifier reference voltage

TP96 Discrete Buck regulator: PWM comparator positive input voltage

TP99 Discrete Buck regulator: ambient temperature next to high-side MOSFET Q13

TP100 Discrete Buck regulator: PWM comparator positive input voltage

TP101 Discrete Buck regulator: ambient temperature next to low-side MOSFET Q13

TP102 Integrated Linear regulator: output current monitor

TP105 Integrated Linear regulator: input voltage

TP106 Integrated Linear regulator: output voltage

TP107 Integrated Linear regulator: input current monitor

TP108 NI ELVIS III Function Generator CH-2

TP77, TP84, TP89, TP90, TP91, TP98, TP103, TP104, TP109, TP110

GND

Table 4.3 Discrete Buck Section test points nomenclature

Page 32: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

4.5 Status LEDs

The green LEDs D14 and D18 highlighted in Figure 4.6 turn ON when, respectively, the

Integrated Buck and the Discrete Linear sub-sections of the Discrete Linear Section are

powered.

Figure 4.6 Discrete Buck Section status LEDs

D14 D18

Page 33: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

5. DC-AC Section

5.1 Architecture

The DC-AC Inverter Section of TI Power Electronics Board for NI ELVIS III is shown in

Figure 5.1. This section implements a MOSFET Full-Bridge inverter, which can operate in:

• Pulse-Width-Modulated (PWM) mode

• Square-Wave-Modulation (SWM) mode

In PWM mode, the inverter can be connected to a configurable L-C filter. In SWM mode,

the inverter can be connected to a high-frequency transformer.

Figure 5.1 DC-AC Inverter Section of TI Power Electronics Board for NI ELVIS III

The DC-AC Inverter Section operates with NI ELVIS III Variable Power Supply voltage between 10V minimum and 12V maximum. Do not use voltages out of this range, unless explicitly indicated in the Power Electronics Laboratory Manual of TI Power Electronics Board for NI ELVIS III.

Follow the instructions provided in the Power Electronics Laboratory Manual of TI Power Electronics Board for NI ELVIS III for correct operation of the DC-AC Inverter Section. A wrong operation procedure may cause incorrect system operation and overheating.

Page 34: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

DO NOT touch the integrated and discrete components on board while the DC-AC Section is in operation, because they can be hot.

The schematic given in Figure 5.2 illustrates the main functional blocks of the DC-AC

Inverter Section, and how they interact among each other and with the NI ELVIS III.

Figure 5.2 Interaction among DC-AC Inverter Section components and NI ELVIS III

The main functional blocks of the DC-AC Inverter Section are:

• an N-channel MOSFET Full-Bridge (Q9,Q10,Q11,Q12), featuring the inverter

function

• a MOSFETs driver (U11,U17), featuring the MOSFETs turn ON and turn OFF

• a discrete modulator (U12,U14, U15, U16, U19), featuring PWM/SWM modulations

• a modulator setup (U23,J29,J30,J31,J32), featuring the PWM/SWM configuration

• a resistor (R44), featuring the Full-Bridge fixed load function

• an L-C filter (L4, C25, featuring the filter function in PWM inverter mode

• a jumper (J4), featuring the DC current monitor bypass function

• a jumper (J21), featuring the Full-Bridge load configuration function

• a jumper (J22), featuring the high-frequency transformer step up/down configuration

function

Page 35: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

• a jumper (J24), featuring the L-C filter bypass function

Page 36: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

5.2 Main Components

The main components comprising the DC-AC Inverter Section are labeled in Figure 5.3 and

are described in Table 5.1.

Figure 5.3 DC-AC Inverter Section main discrete and integrated components

U9 U22 U17 U18 U11 U13 U24 U21

U68 U8 Q9,Q10,Q11,Q12 T5 U10 T6 L4 L3

Page 37: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

designator part code description

L3, L4 7447231682 Inductor, Wirewound, 6.8 mH, 0.3 A, 5.75 https://katalog.we-online.de/pbs/datasheet/7447231682.pdf

Q9, Q10, Q11, Q12

CSD16322Q5C MOSFET, N-CH, 25 V, 97 A, http://www.ti.com/lit/gpn/CSD16322Q5C

T4 (bottom layer), T5

CST7030-150LC 1:150 current sense transformer, 2993 uH https://www.coilcraft.com/pdfs/cst7030.pdf

T6 7491196112 1.71:1:1 Transformer, 500 uH https://katalog.we-online.com/pbs/datasheet/7491196112.pdf

U8 INA139NA/3K

36-V, High-Side, High-Speed, Current Output Current Shunt Monitor http://www.ti.com/lit/gpn/INA139

U9,U10 OPI123 Optocoupler, 15 kV, 50% min CTR http://www.ttelectronics.com/sites/default/files/download-files/OPI120-123_C.pdf

U11,U17 UCC27712DR 620-V High-Side Low-Side Gate Driver with 2.5A Peak Output and RobustDrive http://www.ti.com/lit/gpn/UCC27712

U12 (bottom layer), U20 (bottom layer)

TL022CD

Dual Low-Power General-Purpose Operational Amplifier, 10 to 30 V http://www.ti.com/lit/gpn/TL022

U13,U18 SN74LVC1G04DBVR Single Inverter Gate http://www.ti.com/lit/gpn/SN74LVC1G04

U15 (bottom layer)

OPA170AIDBVR

MicroPower, Rail-to-Rail Output, General Purpose Operational Amplifier, 2.7 to 36 V http://www.ti.com/lit/gpn/OPA2170

U21 TPS71501DCKR

Single Output LDO, 50 mA, Adjustable 1.2 to 15 V Output, 3 to 24 V Input http://www.ti.com/lit/gpn/TPS715

U22 LM828M5 Switched Capacitor Voltage Converter http://www.ti.com/lit/gpn/LM828

U23 (bottom layer)

CD4053BPWRG3

CMOS Triple 2-Channel Analog Multiplexer/Demultiplexer with Logic-Level Conversion http://www.ti.com/lit/gpn/CD4051B

U24 LM2765M6X/NOPB Switched Capacitor Voltage Converter http://www.ti.com/lit/gpn/LM2765

U19 (bottom layer), U68

SN74LVC1G04DBVR Single Inverter Gate http://www.ti.com/lit/gpn/SN74LVC1G04

Table 5.1 DC-AC Inverter Section main components nomenclature

Page 38: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

5.3 Jumpers

The jumpers comprising the DC-AC Inverter Section are labeled in Figure 5.4 and are

described in Table 5.2. The jumpers can be configured to perform experiments in this

section, with PWM and SWM inverter modulation modes, high-frequency transformer in

step-up and step down operation modes, under different operating conditions.

Figure 5.4 DC-AC Inverter Section jumpers

J27 J21 J4 J23 J26 J22 J24

J32 J31 J30 J29 J28

Page 39: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

designator description

J4 short = bypasses the transformer DC current monitor

J21

short TP53-TP59 = connects the inverter output to the 50 fixed load resistor R44 (PWM mode inverter operation)

short TP53-TP54 = connects the inverter output to the high-frequency transformer T6 (SWM mode inverter operation)

J22

short TP58-TP51 = connects the two secondary coils of the high-frequency

transformer in series to the 100 fixed load resistor R43, for step-up operation short TP60-TP51 = connects one single secondary coil of the high-frequency

transformer in series to the 100 fixed load resistor R43, for step-down operation

J23 short = bypasses the inverter 6.8mH input filter inductor L3

J24 short = bypasses the inverter 6.8mH output filter inductor L4

J26 short = connects the inverter 100F input filter capacitor C23

J27 short = connects the inverter 10F output filter capacitor C25

J28

short 1-2 = connects the transformer DC current monitor output to the inverter

modulator (SWM mode inverter operation)

short 2-3 = connects the transformer DC current monitor output to ground (PWM

mode inverter operation)

J29

short 1-2 = SWM mode inverter operation

short 2-3 = PWM mode inverter operation

J30

short 1-2 = SWM mode inverter operation

short 2-3 = PWM mode inverter operation

J31

short 1-2 = PWM mode inverter operation

short 2-3 = SWM mode inverter operation

J32 short 1-2 = Disable U23

short 2-3 = Enable U23

Table 5.2 DC-AC Inverter Section jumpers nomenclature

Ensure that the jumpers J21, J28, J29, J30, and J31 are correctly configured for PWM mode or SWM mode inverter operation, before operating the DC-AC Inverter Section. Mismatching the jumper’s configuration causes improper system operation and overheating.

Page 40: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

5.4 Tests Points

The test points comprising the DC-AC Inverter Section are labeled in Figure 5.5 and are

described in Table 5.3. They allow performing the measurement of voltages and currents in

this section, with PWM and SWM inverter modulation modes, high-frequency transformer in

step-up and step down operation modes, under different operating conditions.

Figure 5.5 DC-AC Inverter Section test points

TP63 TP64 TP43 TP57 TP42 TP55 TP56 TP69 TP44

TP41

TP40

TP46 TP73 TP70 TP68

TP67 TP52 TP61

TP72

TP71

TP75 TP45 TP65 TP74 TP66

TP62

Page 41: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

designator description

TP40 high-frequency transformer T6 secondary coils output current AC component

TP42 inverter input current

TP44 inverter input voltage

TP45 inverter output current AC component

TP52 high-frequency transformer T6 secondary coils load voltage

TP55 Full-Bridge high-side MOSFET Q9 gate voltage

TP56 Full-Bridge high-side MOSFET Q10 gate voltage

TP57 inverter output voltage positive pole

TP62 inverter output voltage negative pole

TP63 Full-Bridge low-side MOSFET Q11 gate voltage

TP64 Full-Bridge low-side MOSFET Q12 gate voltage

TP66 opto-coupler U9 output load voltage

TP68 opto-coupler U9 output supply voltage

TP67 opto-coupler U10 output supply voltage

TP69 opto-coupler U10 output load voltage

TP70 NI ELVIS III Function Generator CH-2

TP71 NI ELVIS III Function Generator CH-1

TP74 Full-Bridge Q9,Q11 MOSFETs leg PWM gate driver signal

TP75 Full-Bridge Q10,Q12 MOSFETs leg PWM gate driver signal

TP41, TP43, TP46, TP61, TP65, TP72, TP73 GND

Table 5.3 DC-AC Inverter Section test points nomenclature

Page 42: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

5.5 Status LED

The green LED D15 highlighted in Figure 5.6 turns ON when the DC-AC Inverter Section is

powered.

Figure 5.6 DC-AC Inverter Section status LED

D15

Page 43: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

6. AC-DC Section

6.1 Architecture

The AC-DC Section of TI Power Electronics Board for NI ELVIS III is shown in Figure 6.1.

This section implements a Diode-Bridge rectifier, which can operate with fixed resistive load

and with post-regulated load.

Figure 6.1 AC-DC Section of TI Power Electronics Board for NI ELVIS III

The AC-DC Rectifier Section operates with NI ELVIS III Variable Power Supply voltage between 10V minimum and 12.5V maximum. Do not use voltages out of this range, unless explicitly indicated in the Power Electronics Laboratory Manual of TI Power Electronics Board for NI ELVIS III.

Follow the instructions provided in the Power Electronics Laboratory Manual of TI Power Electronics Board for NI ELVIS III for correct operation of the AC-DC Rectifier Section. A wrong operation procedure may cause incorrect system operation and overheating.

DO NOT touch the integrated and discrete components on board while the AC-DC Section is in operation, because they can be hot.

Page 44: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

The schematic given in Figure 6.2 illustrates the main functional blocks of the AC-DC

Section, and how they interact among each other and with the NI ELVIS III.

Figure 6.2 Interaction among AC-DC Rectifier Section components and NI ELVIS III

The main functional blocks of the DC-AC Rectifier Section are:

• a Diode Full-Bridge (D2,D3,D4,D5), featuring the rectifier function

• output capacitors (C2, C3), featuring the rectified voltage filtering function

• a power OP-AMP integrated circuit (U2), featuring AC source function

• a power transformer (T3), featuring AC source-to-rectifier decoupling function

• two resistors (R6,R7), featuring the rectifier fixed load function

• an integrated buck regulator (U5), featuring the post-regulator function

• a resistor (R24), featuring the buck regulator fixed load function

• an integrated linear regulator (U6), featuring the point-of-load regulator function

• a resistor (R33), featuring the linear regulator fixed load function

• a jumper (J9), featuring the rectifier load configuration function

• a jumper (J10), featuring the buck regulator load configuration function

Page 45: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

6.2 Main Components

The main components comprising the AC-DC Rectifier Section are labeled in Figure 6.3

and are described in Table 6.1.

Figure 6.3 AC-DC Rectifier Section main discrete and integrated components

L2 U1 T1 U2 T3

U71 U75 D2,D3,D4,D5 U5 U6 T2 L1

Q4,Q5 U3

Page 46: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

designator part code description

L1 744750420100 Inductor, Shielded, Ferrite, 10 µH, 6.2 A, 0.0155 https://katalog.we-online.de/pbs/datasheet/744750420100.pdf

L2 LPS6225-473MLB Inductor, Shielded Drum Core, Ferrite, 47 µH, 0.8 A, 0.36 ohm https://www.coilcraft.com/pdfs/lps6225.pdf

D2, D3, D4, D5 B550C-13-F Diode, Schottky, 50 V, 5 A https://www.diodes.com/assets/Datasheets/ds13012.pdf

Q4, Q5 CSD17571Q2 MOSFET, N-CH, 30 V, 22 A http://www.ti.com/lit/gpn/CSD17571Q2

T1, T2 CST7030-150LC 1:150 current sense transformer, 2993 uH https://www.coilcraft.com/pdfs/cst7030.pdf

T3 750311308 1:1 Transformer, 100 uH https://katalog.we-online.com/pbs/datasheet/750311308.pdf

U1, U3, U5 INA139NA/3K

36-V, High-Side, High-Speed, Current Output Current Shunt Monitor http://www.ti.com/lit/gpn/INA139

U2 OPA2674I-14DR

Dual Wideband, High Output Current, Operational Amplifier with Current Limit, 5 to 12 V http://www.ti.com/lit/gpn/OPA2674

U4 (bottom layer)

TPS40305DRCR

3V to 20V Wide Input Synchronous Buck Controller for High Power Density, High Efficiency, 1.2 MHz http://www.ti.com/lit/gpn/TPS40305

U6 TPS7A6201QKTTRQ1 Single Output Automotive LDO, 300 mA, Adjustable 2.5 to 7 V Output, 4 to 40 V Input http://www.ti.com/lit/gpn/TPS7A6201-Q1

U71 TPS22810DBVR

2.7-18-V, 2-A, 79-mΩ, Load Switch with Thermal Protection http://www.ti.com/lit/gpn/TPS22810

U75 LM4040C25IDBZR

Precision Micropower Shunt Voltage Reference, 0.5% accuracy, 2.5 V, 15 mA http://www.ti.com/lit/gpn/LM4040

Table 6.1 AC-DC Rectifier Section main components nomenclature

Page 47: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

6.3 Jumpers

The jumpers comprising the AC-DC Rectifier Section are labeled in Figure 6.4 and are

described in Table 6.2. The jumpers can be configured to perform experiments in this

section, with unregulated fixed load or post-regulated load, under different operating

conditions.

Figure 6.4 AC-DC Rectifier Section jumpers

J15 J18 J6 J19 J10

J8 J7 J3 J9 J14 J13

Page 48: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

designator description

J3 short = connects the 220nF rectifier output filter capacitor C3

J6 short = bypasses the 10H rectifier input inductance L1

J7,J8 short = connects the output of the power OP-AMPs U2 to the decoupling

transformer T3

J9

short TP25-TP111 = connects the rectifier output to the 402 parallel fixed load resistors R6 and R7

short TP25-TP23 = connects the rectifier output to the integrated buck regulator U4

J10

short TP151-TP521 = connects the U4 integrated buck regulator output to the 100 fixed load resistor R24

short TP151-TP150 = connects the U4 integrated buck regulator output to the integrated linear regulator U6

J13 short = sets the integrated buck regulator U4 nominal output voltage at 5V open = sets the integrated buck regulator U4 nominal output voltage at 3.3V

J14 short = disables the integrated buck regulator U4 open = enables the integrated buck regulator U4

J15 short 1-2 = enables the integrated linear regulator U6 short 2-3 = disables the integrated linear regulator U6

J18 short = connects the integrated linear regulator 10F output capacitor C18

J19 short = sets the integrated linear regulator U6 nominal output voltage at 3.3V open = sets the integrated linear regulator U6 nominal output voltage at 2.5V

Table 6.2 AC-DC Rectifier Section jumpers nomenclature

Page 49: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

6.4 Tests Points

The test points comprising the AC-DC Rectifier Section are labeled in Figure 6.5 and are

described in Table 6.3. They allow performing the measurement of voltages and currents in

this section, with unregulated fixed load or post-regulated load, under different operating

conditions.

Figure 6.5 AC-DC Rectifier Section test points

TP2 TP33 TP32 TP5 TP11 TP3 TP19 TP24 TP4 TP17 TP9 TP10

TP18 TP7 TP1 TP37 TP20 TP29 TP14 TP39 TP26

T30

TP28

TP35 TP34 TP36

TP31

TP27

TP8

TP38

TP6

Page 50: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

designator description

TP1 ELVIS III Variable Power Supply voltage

TP2 Diode Full-Bridge output current AC component

TP4 rectifier output current DC component

TP6 rectifier output voltage

TP7 Diode Full-Bridge input current AC component

TP9 Diode Full-Bridge AC input voltage positive pole

TP10 Diode Full-Bridge AC input voltage negative pole

TP14 power OP-AMP U2, non inverting stage, negative input voltage

TP17 power OP-AMP U2, non inverting stage, output voltage

TP18 NI ELVIS III Function Generator CH-1 = power OP-AMP U2, non inverting stage, positive input voltage

TP19 power OP-AMP U2, inverting stage, output voltage

TP20 NI ELVIS III Function Generator CH-2

TP26 power OP-AMP U2, inverting stage, negative input voltage

TP27 integrated buck regulator U4 input voltage

TP28 integrated buck regulator U4 output current DC component

TP31 integrated buck regulator U4 switching node voltage

TP32 integrated buck regulator U4 output voltage

TP34 integrated linear regulator U6 output current DC component

TP36 integrated linear regulator U6 input voltage

TP37 integrated linear regulator U6 output voltage

TP3, TP5, TP8, TP11, TP24, TP29, TP30,TP33, TP35, TP38, TP39

GND

Table 6.3 AC-DC Section test points nomenclature

Page 51: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

6.5 Status LED

The green LED D16 highlighted in Figure 6.6 turns ON when the AC-DC rectifier Section is

powered.

Figure 6.6 AC-DC Rectifier Section status LED

D16

Page 52: TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI ELVIS III The TI Power Electronics Board for NI ELVIS III, is shown in Figure 2.1,

7. Environmental

The TI Power Electronics Board for NI ELVIS III is designed to function under the following

environmental conditions:

• Standard rating

• Indoor use only

• Temperature 5 °C to 40 °C

• Altitude up to 2000 m

• Maximum relative humidity of 80% up to 31°C decreasing linearly to 50% relative humidity

at 40°C

• Pollution Degree 2

• Mains supply voltage fluctuations up to ±10% of the nominal voltage

• Maximum transient overvoltage 2500V

• Marked degree of protection to IEC 60529: Ordinary Equipment (IPX0)