TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI...
Transcript of TI Power Electronics Board for NI ELVIS III...2. Introduction 2.1 TI Power Electronics Board for NI...
User Manual TI Power Electronics Board for NI ELVIS III
Set Up and Configuration
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
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
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)
• 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
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
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
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.
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.
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)
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.
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.
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
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.
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
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
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
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
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
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
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
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.
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
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.
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
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
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
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
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
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
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
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.
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
• a jumper (J24), featuring the L-C filter bypass function
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
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
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
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.
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
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
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
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.
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
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
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
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
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
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
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
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
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)