100 W high efficiency and low THD dimmable LED driver … · STEVAL-LLL008V1 evaluation kit power...

IntroductionThe STEVAL-LLL008V1 reference design is a dual-stage LED driver with high power factor designed for 100 W LED lightingapplications using 6LoWPAN mesh networking. It consists of two main sections, the power main board and the connectivitydaughter board.

The power board in the STEVAL-LLL008V1 evaluation kit, with dual-stage power conversion and high power factor, is highlysuitable for satisfying LED power supply specifications in street lighting applications.

On the primary side, the HVLED001B controller manages the AC/DC HPF Flyback converter. The control loop is managedthrough primary side regulation (PSR), in which the primary auxiliary transformer provides a signal proportional to the outputvoltage on the controller pin ZCD. The main advantage of primary side management of the voltage loop is that no isolatedoptocoupler is needed.

The converter output (J2 connector) can deliver 105 W with an average output voltage of 79 V (~1.8 V maximum ripple) to thebuck stage, which can generate 1.4 A regulated current to the LED driver loads. The auxiliary choke of a few milliamps availableon the secondary transformer stage is able to supply the voltage needed to power the HVLED002 controller, which manages theinverse buck circuit.

The connectivity daughter board integrates an STM32L071KZ microcontroller, which is able to receive remote on, off anddimming commands via an embedded SPSGRFC sub-1 GHz transceiver module. The connectivity functionality can beextended to multiple lighting nodes in a 6LowPAN mesh network. The daughter board can be connected through the J12 4-pinconnector on the power board. Pin 1 powers the control board with 3.3 V; Pin 4 provides a common GND; Pin 3 is for Enable/Disable signals from the control board; Pin 2 is for PWM dimming signals from the control board.

The overall design offers high efficiency, a PSR control loop without optocoupler, and the option to connect a control board withprogrammable STM32 microcontroller for dimming and Enable/Disable functionality.

Figure 1. STEVAL-LLL008V1 evaluation kit power board and control board

100 W high efficiency and low THD dimmable LED driver reference design based on HVLED001B, HVLED002 and SPSGRFC

AN5467

Application note

AN5467 - Rev 1 - May 2020For further information contact your local STMicroelectronics sales office.

www.st.com

https://www.st.com/en/product/steval-lll008v1?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467


https://www.st.com/en/product/hvled001b?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467

https://www.st.com/en/product/hvled002?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467

https://www.st.com/en/product/stm32l071kz?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467

https://www.st.com/en/product/spsgrfc?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467

1 LED street lighting in Smart City applications

High voltage LED street and zone lighting applications typically require robust but highly efficient power suppliesable to generate tightly regulated output currents with high power factor, low THD and minimal voltage ripple.The design achieves very high efficiency through the HVLED001B controller, which drives a STF23N80K5 powerMOSFET on the primary side of an AC/DC HPF flyback converter and regulates the voltage on the same primaryside.The flyback converter output is then regulated by the inverse buck stage, which is driven by the HVLED002controller through the STL4N10F7 power MOSFET. The HVLED002 translates external dimming commands intocurrent limitation on the inverse buck converter to achieve the desired dimming effect.Networking and connectivity solutions are also often implemented for the simultaneous control of several lightingnodes in a certain area. The STEVAL-LLL008V1 power converter is coupled with a SPSGRFC module to providesub-1 GHz connectivity for remote dimming and on/off control. The STSW-LLL008FW firmware for the evaluationkit provides 6LoWPAN functionality to allow wireless mesh network control of multiple nodes, with the addition ofa data concentrator unit able to provision devices on a 6LoWPAN network and interface with an app to deliverSmart City lighting control.

Figure 2. LED street lighting application with high voltage LED controller

90 - 265VAC Mains LDO

Bridgerectifier

STM32L071KZMCU

STM32L0

STSW-LLL008FW firmware

SPSGRFCSPIRIT-1

transceiver unitON / OFF

DIMMING

CURRENTCONTROL

Vout = 75V

3V3

Flyback topology

STF23N80K5

STM32 NUCLEO PLATFORMDATA CONCENTRATOR UNIT

powerboard

HVLED001BHPF flyback

controller

STTH30R03CG1.5KE300A

STPS1H100U

mobileApp

STM32L0

6LoWPAN wirelessmesh network

HVLED002LED

controller

connectivityboard

Pout = 105Wat 1.4A

drivers

utilities

CMSISmiddleware

applications

STTH108A

STL4N10F7

Inverse buck

VIN

Filter

GATEDRIVER

ZCD

PSRCONTROL

LOOP

ON / OFF

DIMMING

LF33AB

AN5467LED street lighting in Smart City applications

AN5467 - Rev 1 page 2/35


https://www.st.com/en/product/stf23n80k5?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467


https://www.st.com/en/product/stl4n10f7?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467


https://www.st.com/en/product/stsw-lll008fw?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467

2 Schematic diagrams

Figure 3. STEVAL-LLL008V1 power board schematic diagram

R621K

R647K1% C24

100nF

Q19

BC817-25L

R514K3

1

R28150K2W

1

OUT6

D17TZM5232B-GS08

TP8

C62.2nF630V

R100R331%

1W

TP8

R230R0

8G

ND

C2220nF305Vac

X2

C18470uF100V

C21220uF

25V

2

D11

BZX85B82

VIN7

3 3

2

1

R49100k

HVLED001B

C13470pF

C17470uF100V

C3410nF

U3

C20220nF100V

2

2

R351K

1

ZCD

C26470pF

1

1

R210M

Q16MMBT3906LT1

C20220nF100V

L2560uH

C1515pF

R40R0

C62.2nF630V

D8TZM5246B-GS08

16V

1

R48NM

R17750R

R13470R

2

U6LF33AB

R58680R

Q18MMBT3904LT1

R9220R

D9LL4148

R1420K1%

Q7ASTL20DN10F7

Q5BC817-25L

2

V_S Aux

2

1

4FB

Vcc_3.3V

D24SMZJ3809-68V

R271K0

R360R0

4

T12295.0004

D1

1

Q18MMBT3904LT1

U6LF33AB

R39200k

R38100k

R230R0

TP10

2

L1EH28-1.5-02-20M

R26NM

2

D41.5KE300A

C81.5nF

R4722K

TP12

C18470uF100V

R15150K2W

2

TP1

GN

D5

R21NM

2

3

1

1

2

D6LL4148

D16NM

R431K0

J1

R551M

Q32N7002

2

D22LL4148

4

C2910uF

35V

Q1STF23N80K5

2

1

C33.3nF

300VacX1 Y2

D5STTH108A

C10100nF

R3NM

R50470k

TP15

3

1

R442K7

C16470uF100V

2

R28150K2W

R621K

C1222uF50V

+

TP9

D10LL4148

TP6TP4

J5

2

R160R0

R370R33

1%1W

2C5470nF

305VacX2

D21LL4148

2

J2

FB2

D23LL4148

R100R331%

1W

3 TOFF

R60750R

RV1S10 300K

2

TP3

2

5

R110KNM

TP10

1

1

C1122uF

V_S Aux

4

6

2

R49100k

R571K

D20LL4148

1

HVLED001B

C2810uF35V

R22NM

R547K1%

R420R36

1%

C22

1nF1kV

C2910uF

35V

R39200k

1

R351K

TP1

R40100R

Q16MMBT3906LT1

C21220uF

25V

TP16TP16

C311uF

2

D41.5KE300A

1

C14100pF1kV

C3210uF35V

2

NM

RT/CT

1

D2STTH30R03CG

2

R48NM

En_Control_ON/OFF

R411k0

R13470R

OUT3

2

C25470pF

TP2

R1420K1%

8

2

C3010nF

TP7

D3GBU4K-E3/45

2

C24100nF

J5

L1EH28-1.5-02-20M

D7LL4148

STPS

1H10

0U

11

Q7ASTL20DN10F7

R17750R

L2560uH

21

R26NM

1

R4582k

1

6ZCD

R4722K

7CS

1

R6124K

R15150K2W

Q7BSTL20DN10F7

R21NM

R8220R

1

C274.7uF

100V

1

VREF8

1

R38100k

C333.3nF300VacX1 Y2

D9LL4148

C7330nF

V_Aux Vout

1

D6LL4148

C17470uF100V

R53NM

R46300k

TP12

R551M

2

1

A

R5910k

1

5

R110R331%1W

C23NM

1

D15TZM5257B-GS08

33V

C33.3nF

300VacX1 Y2

2

R442K7

1

R540R0

D24SMZJ3809-68V

R50470k

C3547nF

1

1

2

C16470uF100V

1

TP4 R370R33

1%1W

RT/CT4

1

D20LL4148

R210M

D13STPS0560Z

J2

TP13

1

R1256K

R520R33

1%

D3GBU4K-E3/45

2

7C2

220nF305Vac

X2RV1

S10 300K

1H

VSU

TP7

1

3

GD

D11

BZX85B82

2

2

1

1

2

1

D10LL4148

D18STPS2H100AF

2

TP15

R22NM

2

C3010nF

Q1STF23N80K5

TP9

2

D17TZM5232B-GS08

R40100R

Q5BC817-25L

D8TZM5246B-GS08

16V

2

C26470pF

2

3

Q19

BC817-25L

Hea

tsin

k m

ount

ed o

n Q

1

Vout = 75VPout =105W @1.4A

Vac = 90 - 265

D14TZM5245B-GS0815V

R56100K

HS

7141DGHeat-Sink

J1

K

U2

D19LL4148

HVLED002

TP6

1

GND

2 2

1

1

C25470pF

C333.3nF300VacX1 Y2

3

TP2

1

C1222uF50V

1

TP3

VBUS

R647K1%

1

F1

2A

R540R0

R514K3

VCC

2

C22

1nF1kV

1

D21LL4148

2

2

C1515pF

1

1

R4582k

2

D14TZM5245B-GS0815V

C23NM

C81.5nF

2

2

9GD

6

2

R631K

Q2

STL4N10F7

CO

MP

2

R8220R

R411k0

R9220R

C3410nF

U5

1

TL431AI

U3

R571K

R53NM

R5910k

D2STTH30R03CG

1

1

1

C3210uF35V

Q32N7002

2

2

D22LL4148

1

2

2

9

D5STTH108A

4

STPS

1H10

0U

2

C10100nF

2

2

C7330nF

1

R160R0

TP13

1

R40R0

R420R36

1%

HVLED002

U2

1

C1220nF

305VacX2

F1

2A

2

2

IN1

2

1

3

C5470nF

305VacX2

2

D1

J12

7

J12

R1256K

R520R33

1%

5 OPTO

C1220nF

305VacX2

D18STPS2H100AF

1

8

Q7BSTL20DN10F7

R360R0

R271K0

D7LL4148

R60750R

VBUS

1

D13STPS0560Z

10VC

C

R110R331%1W

1

C19470uF100V

TL431AI

R547K1%

C91nF

1

1

C19470uF100V

2

D23LL4148

C2810uF35V

2

R6124K

1

T12295.0004

1

CS3

CS

C311uF

D19LL4148

2

R431K0

C14100pF1kV

R56100K

C13470pF

TP17

R631K

U5

TP17

C3547nF

HS

7141DGHeat-Sink

Q2

STL4N10F7

D16NM

C274.7uF

100V

R46300k

DIMMING

D15TZM5257B-GS08

33V

4

R58680R

R3NM

TP5TP5

2

C91nF

TP11

C1122uF

R110KNM

TP11

-

AN

5467 - Rev 1

page 3/35

AN

5467Schem

atic diagrams

Figure 4. STEVAL-LLL008V1 control board schematic diagram

PA1_GPIO_3_RADIO

PB5_

SDN_

RADI

O

PA10_GPIO_2_RADIO

NRST

PA9_GPIO_1_RADIO

NRST

PA14_SWCLK

LED-ON-OFF

PA5_

SPI_

SCK_

RADI

OPA

6_SP

I_M

ISO

_RAD

IO

PA8_GPIO_0_RADIO

PA3_

SPI_

CS_R

ADIO

PB5_SDN_RADIO

PA3_SPI_CS_RADIO

PA4_SPI_MOSI_RADIO

PA6_SPI_MISO_RADIO

PA5_SPI_SCK_RADIO3V3

PA1_GPIO_3_RADIO

PA10_GPIO_2_RADIO

PA9_GPIO_1_RADIO

PA8_GPIO_0_RADIO3V3

NRST

PA13_SWDIOPA14_SWCLK

THERM-DIMM-ADC

THERM-DIMM-ADC

PA13_SWDIO

PA4_

SPI_

MO

SI_R

ADIO

3V3LED-DIMMING

LED-ON-OFF

3V3

3V3

3V3

3V3

3V3

LED-DIMMING

3V3

3V3

Microcontroller Unit

SPIRIT-1 Transceiver Unit

Programming Connector

Thermal Foldback

C412.2pFC412.2pF

U8

STM32L071KZU6_UFQFPN32

U8

STM32L071KZU6_UFQFPN32

NRST3VSSA4VDDA5PA06PA17PA28

PA3

9PA

410

PA5

11PA

612

PA7

13

PB1

15PB

014

PC14-OSC32_IN1PC15_OSC32_IN2

PA9 19

VSS

16

PB6

28

VDD 17PA8 18PA10 20PA11 21PA12 22PA13 23VDDIO2 24

PA14

25PB

426

PB5

27

PB7

29BO

OT0

30VS

S31

VDD

32

VSS

33

R581KR581K

Y132.768kHz

Y132.768kHz

D22LEDD22LED

J4

TERM BLOCK PLUG 4POS STR 2.5MM(1778858)

J4

TERM BLOCK PLUG 4POS STR 2.5MM(1778858)

1234

R531KR531K

R591KR591K

R571KR571K

t

RT1NTC

t

RT1NTC

C40100nFC40100nF

C38

100nF

C38

100nF

C37100nFC37100nFSW1

PUSHBUTTONSW1

PUSHBUTTON

1

2

4

3

D23DIODED23DIODE

12

D21LEDD21LED

C50

100nF

C50

100nF

C44100nFC44100nF

R54

10K

R54

10K

C392.2pFC392.2pF

C43100nFC43100nF

R63

10K

R63

10K

R5210KR5210K

U10

SPSGRFC

U10

SPSGRFC

GPIO_31

GPIO_22

GPIO_13

GPIO_04

Vin5 GN

D6

11SDN

SPI_CS 10

SPI_MOSI 9

SPI_MISO 8

SPI_CLK 7

C42100nFC42100nF

J3

HEADER 5X2

J3

HEADER 5X2

2468

10

13579

AN

5467 - Rev 1

page 4/35

AN

5467Schem

atic diagrams

3 STEVAL-LLL008V1 evaluation board layout

Figure 5. STEVAL-LLL008V1 power board top side

Figure 6. STEVAL-LLL008V1 power board bottom side

AN5467STEVAL-LLL008V1 evaluation board layout

AN5467 - Rev 1 page 5/35

4 STEVAL-LLL008V1 power board overview

Table 1. STEVAL-LLL008V1 power board electrical characteristics

Parameter Value

VIN at J1 connector From 90 VAC to 265 VAC

VOUT Converter (J2) Average=79 VDC

ILED max (J5 LED) 1.4 A

DC-DC converter VOUT ripple 1.8 V VPK

VOUT (J5 LED) 40 VDC – 70 VDC

Pout max 100 W

Overall efficiency (ILED=1.4 A)Min: >90% at 90 VIN_AC – 40 VOUT_DC

Max: >93% at 265 VIN_AC -70 VOUT_DC

No Load Consumption265 VIN_AC stand alone: <300 mW

265 VIN_AC with MCU board: <600 mW

Output Ripple Current max. <100 mA

THD at 100 W for range VIN <15%

PF at 100 W for range VIN >95%

Table 2. STEVAL-LLL008V1 Connectors and Test Points

Reference Type Description

J1 PCB Terminal Power Input

J2 PCB Terminal Output AC-DC converter

J5 PCB Terminal Output A/K LED load

J12 Female Headers Connection with MCU board

TP1 Test Point VCC → HVLED001B

TP2 Test Point FB → HVLED001B

TP3 Test Point CS → HVLED001B

TP4 Test Point TOFF → HVLED001B

TP5 Test Point OPTO → HVLED001B

TP6 Test Point ZCD → HVLED001B

TP7 Test Point Primary VBUS

TP8 Test Point GD → HVLED001B

TP9 Test Point Primary GND

TP10 Test Point Secondary GND

TP11 Test Point Secondary VAUX

TP12 Test Point VOUT AC-DC converter

TP13 Test Point Primary VDrain

TP15 Test Point Secondary VCS

AN5467STEVAL-LLL008V1 power board overview

AN5467 - Rev 1 page 6/35

Reference Type Description

TP16 Test Point Secondary VGate

TP17 Test Point Secondary VDrain

RELATED LINKS refer to the HVLED001B datasheet for detailed electrical characteristics of this device

refer to the HVLED002 datasheet for detailed electrical characteristics of this device

4.1 HPF Flyback stage

The HPF Flyback stage is able to support a wide input voltage range (90-265 V) managed on the primary side bythe HVLED001B (U3) controller, which implements quasi-resonant valley skipping with secondary rectificationdiode.The PSR control loop is regulated through an auxiliary winding partitioned on the ZCD pin. By exploiting thisappropriately calculated partition, it is also possible to set an output overvoltage threshold beyond which thesystem halts primary switching activity, as well as possible brown-in/out thresholds.As soon as the input voltage is supplied to the J1 connector, the HVLED001B device is turned on thanks to thehigh voltage start up (pin 1), which preloads the VCC of the device, and is then self-powered thanks to theswitching activity that provides a voltage from the primary auxiliary.The same auxiliary, thanks to the R5, R6 and R14 partition on the ZCD pin, is able to regulate the converteroutput voltage (PSR). The STF23N80K5 (800 V) Power MOSFET is able to withstand the voltage peaks, whichare clamped by diodes D4 and D5. The secondary diode is the high performance STTH30R03CG diode and theregulated converter output is 79 V with a 1.8 V pk-pk network frequency ripple.

4.2 Inverted Buck stage

The second stage is an inverted buck capable of controlling an average current of 1.4 A (at 100% load), withswitching activity managed by the HVLED002 (U2) controller. It is powered by the secondary auxiliary windingwhich, thanks to diode D1 and the circuit with the linear regulator (with Q5, U5), turns on the HVLED002 controller(U2), which manage the switching of the buck circuitry (Q2, D18, L2).The constant output LED load current is set by the current sense resistors R42 and R52. The FB pin works insideits operating range set by the fixed VREF pull-up voltage (5 V), which provides a current on resistor R38 throughthe PNP MOSFET.In zero load conditions, a Zener diode (D11-82 V) prevents the output voltage from exceeding the maximumratings of embedded devices. This overvoltage can occur during burst mode switching activity at the no loadcondition, as the primary winding is unable to provide an appropriate signal to the ZCD to regulate the outputvoltage..

4.3 External On/Off and dimming control

The STEVAL-LLL008V1 evaluation kit includes an MCU board with STM32 microcontroller that can be connectedto the power board and receive a 3.3 V regulated voltage from the HVLED002 VIN line via the LF33AB regulator.The connected microcontroller can provide a 0 - 3.3 V square wave PWM signal (pin2) to control dimmingfunctionality. When the signal is 0 V, the FB pin remains inside operating range and the HVLED002 controlleroperates normally; when the signal is at 3.3 V, the FB pin is pulled out of range and controller activity issuspended. Dimming is therefore achieved by regulation of the average LED current output, which is directlyproportional to the TON component of the PWM signal sent by the microcontroller.The MCU board can also supply 3.3 V continuous voltage on the EN Control ON-OFF (pin3) that injects a currenton the U5 Voltage Reference to ensure that the output voltage of the linear regulator will stabilize at approximately5.5 V. This voltage is enough to allow the low drop LF33AB regulator to continue supplying the microcontroller, butit is below the supply threshold of the HVLED002 controller (U2), consequently turning it off and stoppingswitching activity in the inverted buck stage.

AN5467HPF Flyback stage

AN5467 - Rev 1 page 7/35

https://www.st.com/en/product/hvled001b

https://www.st.com/en/product/hvled002




https://www.st.com/en/product/stth30r03?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467






4.4 Protection circuits

The voltage on the cathode (J5) referred to the secondary GND during operation is between 9 V (79-9 V for 70 Voutput voltage) and 39 V (79-39 V for 40 V output). Thanks to the D24 Zener Diode, the board can intercept asudden spike above 68 V in the cathode voltage (e.g., short-circuit), by turning on MOSFET Q3 and pulling the FBpin out of its operating range, consequently stopping the switching activity of the HVLED002 controller in order toprotect related componentry.When the power supply is removed, the voltage present on the capacitance C16, C17, C18 and C19 mounted onthe converter output cannot discharged because MOSFET Q2 is turned off. To overcome this issue, dischargecircuitry has been added to switch MOSFET Q7A off and then switch MOSFET Q7B on when the main powerremoval persists, in order to rapidly discharge the VOUT capacitance of the converter through R57.When the power supply is removed, the voltage present on the converter output cannot discharged becauseMOSFET Q2 is turned off. To overcome this, discharge circuitry is included to switch Q7A off and Q7B on whenswitching activity interruption is detected through the secondary auxiliary winding, consequently dischargingconverter VOUT through R57.

AN5467Protection circuits

AN5467 - Rev 1 page 8/35


5 STEVAL-LLL008V1 power inputs and outputs

The STEVAL-LLL008V1 evaluation kit power board can be configured only to generate output from the high PFflyback converter managed by the HVLED001B controller, or to also apply the buck converter stage managed bythe HVLED002 controller.

Figure 7. STEVAL-LLL008V1 evaluation board connectors1. Input voltage2. MCU connector3. LED load4. Converter output

12

3

4

AK

+12VGN+79V

5.1 Flyback operation only

Step 1. remove R16 (0R0) to remove power from the HVLED002 controller on the buck stage

Step 2. short-circuit the Q2 Gate-Source of to avoid unintentional powering on of this MOSFET

Step 3. supply with 90 - 265 VAC input voltage on J1

Step 4. place a maximum 1.25 A load between pin 1 (+79 V) and pin 2 (GND) of connector J2max. Power Out/Converter VOUT = 100 W/79 V = 1.25 A

Note: ensure that with the load set at 1.25 A, the input power does not exceed 108 W at 90 VIN_AC and 106 W at265 VIN_AC.

5.2 Flyback and buck converter operation

Step 1. if you do not wish to use the MCU board included in the kit and simply operate the power board at100% LED load (1.4 A), remove R62 (1k0) to toggle correct start-up operation

Step 2. supply 90-265VAC on the power board J1 connector

Step 3. connect a constant voltage (40-70 V) active load between pin1 (A) and pin2 (K) on J5 or a LED Loadrated above 1.4 A constant current

Note: ensure that the current supplied to the LED load is within 1.4 A ± 100 mA

AN5467STEVAL-LLL008V1 power inputs and outputs

AN5467 - Rev 1 page 9/35





6 STEVAL-LLL008V1 performance and efficiency measurements

Figure 8. STEVAL-LLL008V1 efficiency with ILED=1.4 A at 40 VOUT and 70 VOUT

ILED=1.4

Efficiency [%]

Vin ac [V]

85%

86%

87%

88%

89%

90%

91%

92%

93%

94%

95%

80 110 140 170 200 230 260

Efficiency Full Load @40Vout

Efficiency Full Load @70Vout

AN5467STEVAL-LLL008V1 performance and efficiency measurements

AN5467 - Rev 1 page 10/35

Figure 9. STEVAL-LLL008V1 efficiency at 70 VOUT with 5%-100% dimming

65%

70%

75%

80%

85%

90%

95%

0% 10% 20% 30% 40% 60% 70% 80% 90% 100%

Efficiency 265Vin @Load between 5%-100%

Efficiency 90Vin @Load between 5%-100%

Efficiency [%]

Load [%]

50%

Figure 10. STEVAL-LLL008V1 Total Harmonic Distortion

0%

2%

4%

6%

8%

10%

12%

14%

16%

18%

20%

80 110 140 170 200 230 260

THD

[%]

Vin [Vac]

THD 70Vout

THD 40Vout


AN5467 - Rev 1 page 11/35

Figure 11. STEVAL-LLL008V1 Power Factor

92.00%

94.00%

96.00%

98.00%

100.00%

80 110 140 170 200 230 260

PF

Vin [Vac]

PF 70Vout

PF 40Vout

Figure 12. STEVAL-LLL008V1 output voltage regulation

36

40

44

48

52

56

60

64

68

72

85 130 175 220 265

Vout

[V]

Vin [Vac]

Vout 70V

Vout 40V


AN5467 - Rev 1 page 12/35

7 STEVAL-LLL008V1 waveforms

7.1 Power-on and power-off

The figures below show the linear start-up characteristics of the STEVAL-LLL008V1 power board at minimuminput voltage with maximum output power and maximum input voltage with approximately half output power. Inboth cases, the converter output voltage and ILED do not demonstrate any abrupt behavior.The converter output voltage in the second figure shows an overshoot due to the light load. Thanks to the internaldynamic overvoltage protection of the HVLED001B (pin ZCD), the primary switching activity is stopped, stabilizingthe right VOUT.

Figure 13. 90 VIN_AC at 70 V-1.4 A power on

Ch.1: Primary VDrain; Ch.2: Converter VOUT; Ch.3: VCCHVLED001B: Ch.4: LED output current

Figure 14. 265 VIN_AC at 40 V-1.4 A power on

Ch.1: Primary VDrain; Ch.2: Converter VOUT; Ch.3: VCCHVLED001B: Ch.4: LED output current

The following figures show the linear behavior of the main signals when VIN is removed.

Figure 15. 90 VIN_AC at 40 V-1.4 A power off

Ch.1: Primary VDrain; Ch.2: Converter VOUT; Ch.3: VCCHVLED001B; Ch.4: LED output current

Figure 16. 265 VIN_AC at 70 V-1.4 A power off

Ch.1: Primary VDrain; Ch.2: Converter VOUT; Ch.3: VCCHVLED001B; Ch.4: LED output current

AN5467STEVAL-LLL008V1 waveforms

AN5467 - Rev 1 page 13/35



7.2 Steady State

The following figures show the main primary side signals (VDS, VGS and ZCD) and the buck VGS managed bythe HVLED002 controller in the steady state condition.

Figure 17. 90 VIN_AC at 70 V-1.4 A steady state

Ch.1: Primary VDrain; Ch.2: Primary VGate; Ch.3: ZCDHVLED001B; Ch.4: Secondary VGate

Figure 18. 265 VIN_AC at 40 V-1.4 A steady state


The figures below show the input current vs the primary VDrain at maximum power output for minimum andmaximum input voltages.

Figure 19. 90 VIN_AC at 70 V-1.4 A input current

Ch.1: Primary VDrain; Ch.4: Input Current



AN5467Steady State

AN5467 - Rev 1 page 14/35


The following figures show the input current shape vs the primary VDrain at minimum output voltage (40 V,approximately half load) for the minimum and maximum input voltages.





The following figures show the burst mode behavior of switching activity.

Figure 23. 90 VIN_AC at no load


Figure 24. 265 VIN_AC at no load


AN5467Steady State

AN5467 - Rev 1 page 15/35

The following figure highlights the primary VDrain peak voltage with the highest Input Voltage (VDrain peak worstcase) showing that the VDS break down voltage of 800 V is guaranteed.

Figure 25. 265 VIN_AC at 70 V-1.4 A primary VDS maximum spike

Ch.1: Primary VDrain; Ch.2: Input Rectified Voltage

7.3 Current and voltage ripple

The following figures show the current (ILED) ripple for the maximum and minimum output voltages.

Figure 26. 90 VIN_AC at 70 V-1.4 A ILED ripple Figure 27. 265 VIN_AC at 40 V-1.4 A ILED ripple

AN5467Current and voltage ripple

AN5467 - Rev 1 page 16/35

The following figures show the output voltage ripple of the converter stage, showing 1.8 V as the highest peak topeak value.

Figure 28. 90 VIN_AC at 70 V-1.4 A VOUT ripple Figure 29. 265 VIN_AC at 40 V-1.4 A VOUT ripple

7.4 Short-circuit overcurrent protection and overvoltage protection (OVP)

The following figures show the appropriate behavior of the main signals during a short-circuit. As soon as theshort-circuit is detected, the VCATHODE voltage on J5 rises rapidly above the D24 Zener diode threshold of 68 V.The MOSFET Q3 is turned on and the FB pin of the HVLED002 is pulled out of its operating range andconsequently stops the switching activity of the HVLED002, reducing overall consumption to around 1 W andavoiding any component damage due to the short-circuit.

Figure 30. 90 VIN_AC at 70 V-1.4 A short-circuit

Ch.1: VCC MCU board; Ch.2: Q3 VGate; Ch.3: FB HVLED002;Ch.4: ILED output current

Figure 31. 265 VIN_AC at 40 V-1.4 A short-circuit


AN5467Short-circuit overcurrent protection and overvoltage protection (OVP)

AN5467 - Rev 1 page 17/35


The figures below show the thermal maps during short-circuit, highlighting the D24 and U2 temperatures.

Figure 32. 90 VIN_AC at 70V-1.4 short-circuit thermalmap

A: D24; B: U2

Figure 33. 265 VIN_AC at 70 V-1.4 A short-circuitthermal map

A: D24; B: U2

The following figures show the appropriate restart behavior when the short-circuit condition has been removed.

Figure 34. 90 VIN_AC at 40 V-1.4 A short removed


Figure 35. 265 VIN_AC at 70 V-1.4 A short removed



AN5467 - Rev 1 page 18/35

The following figure shows the converter output voltage behavior during start-up. Considering the light loadcondition, the converter output voltage tends to have an undesired voltage overshoot. The dynamic overvoltageprotection function provided by the HVLED001B controller limits any undesired overshoot. Once the overvoltagelimit value is identified, the appropriate resistor values for the R5, R6 and R14 divider must be calculated toachieve a voltage of 3 V on the ZCD pin (OVP threshold). The HVLED001B therefore interrupts switching activityand it prevents overvoltage from damaging components on the converter output.

Figure 36. Dynamic OVP during start-up operationCh.1: Primary VGS; Ch.2: Converter VOUT; Ch.3: ZCD HVLED001B


AN5467 - Rev 1 page 19/35

8 STEVAL-LLL008V1 with MCU board on J12

8.1 Dimming on pin2

The following figures show the behavior of the ILED output current when applying between 1% and 100% dimmingfunctionality provided by the MCU board via pin2 on connector J12.

Figure 37. 90 VIN_AC at 70 V-1.4 A 100% dimming

Ch.1: VGate HVLED002; Ch.2: PWM Dimming; Ch.3: ENcontrol ON-OFF; Ch.4: ILED output current

Figure 38. 90 VIN_AC at 70 V-1.4 A 100% dimming(zoom)


Figure 39. 115 VIN_AC at70 V 75% dimming


Figure 40. 230 VIN_AC at70 V 25% dimming


AN5467STEVAL-LLL008V1 with MCU board on J12

AN5467 - Rev 1 page 20/35

Figure 41. 265 VIN_AC at 70 V 1% dimming

Ch.1: VGate HVLED002; Ch.2: PWM Dimming; Ch.3: EN control ON-OFF; Ch.4: ILED output current

8.2 EN Control_ON/OFF on pin 3

The figures below show the appropriate behavior when the MCU board imposes an Enable or Disable signal onthe LED controller in the buck stage.

Figure 42. 265 VIN_AC at 70V ILED=100% disable


Figure 43. 90 VIN_AC at 70V ILED=50% enable


AN5467EN Control_ON/OFF on pin 3

AN5467 - Rev 1 page 21/35

9 STEVAL-LLL008V1 power board EMI

The following figures show the EMI plots at full load conditions.

Figure 44. 115 VIN at full load EMI - neutral Figure 45. 230 VINat full load EMI - phase

AN5467STEVAL-LLL008V1 power board EMI

AN5467 - Rev 1 page 22/35

10 STEVAL-LLL008V1 input current harmonics

The following charts demonstrate compliance with the EN61000-3-2 Class C standard harmonics requirement forlighting applications above 75 W.

Figure 46. 100 VIN harmonic at full load

PIN=108 W; PF=99.84%

0.0001

0.001

0.01

0.1

1

10

Harmonic

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39

Current [A]

Harmonic Order [n]

Measured value EN61000-3-2 Class C

Figure 47. 230 VIN harmonic at full load

PIN=108 W; PF=99.84%

0.0001

0.001

0.01

0.1

1

10

Harmonic

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39

Current [A]

Harmonic Order [n]

Measured value EN61000-3-2 Class C

AN5467STEVAL-LLL008V1 input current harmonics

AN5467 - Rev 1 page 23/35

11 STEVAL-LLL008V1 power board thermal maps

The following figures show the thermal maps on the top and bottom sides of the evaluation kit power board at fullload conditions, with the main components indicated.

Figure 48. 115VIN_AC at 70 V-1.4 A - top

A: L1; B: D3; C: Q1; D: D4; E: T1; F: L2

Figure 49. 230VIN_AC at 70 V-1.4 A - top

A: L1; B: D3; C: Q1; D: D4; E: T1; F: L2

Figure 50. 115 VIN_AC at70 V-1.4 A - bottom

A: Q1; B: R11; C: D2

Figure 51. 230 VIN_AC at70 V-1.4 A - bottom

A: Q1; B: R11; C: D2

AN5467STEVAL-LLL008V1 power board thermal maps

AN5467 - Rev 1 page 24/35

12 Bill of materials

Table 3. STEVAL-LLL008P1 bill of materialsThe STEVAL-LLL008P1 board is supplied with the STEVAL-LLL008V1 kit and is not available for separate sale

Item Q.ty Ref. Part / Value Description Manufacturer Order code

1 2 C1, C2 220nF X2,305Vac

Cap. PolypropyleneMKP, 7x18xp15 TDK - Epcos B32922C3224K000

2 2 C3, C33 3.3nF X1 Y2,300Vac

Cap. Disk Ceram., Ø9 x 5 Vishay VY2332M35Y5VS63V7

3 1 C5 MKP 470nF X2,305Vac

Cap. Polypropylene,9x18xp15 TDK - Epcos B32922C3474M000

4 1 C6 2.2nF 630V R76,630Vcc

Cap. Polypropylene,3x10xp7.5 Kemet R76PD1220SE00J

5 1 C7 330nF X7R, 50V Chip Ceramic Cap.,0805

MULTICOMPPRO MC0805B334K500CT

6 1 C8 1.5nF X7R, 50V Chip Ceramic Cap.,0805 Kemet C0805X152K5RACTU

7 1 C9 nF X7R, 50V Chip Ceramic Cap.1nF, 0805 Kemet C0805C102K5RACTU

8 2 C10, C24 100nF X7R, 50V Chip Ceramic Cap.,0805 Kemet C0805F104K5RACAUTO

9 1 C11 22µF, 35V Chip Ceramic Cap.,1206 TDK - Epcos C3216X5R1V226M160AC

10 1 C12 22µF 25V, 25 Electr. Cap., Ø5x11xp2 Nichicon UPW1E220MDD1TD

11 1 C13 470pF COG-NP0, 100V

Chip Ceramic Cap.,0805 Murata GRM2165C2A471JA01D

12 1 C14 100pF X7R, 1KV Chip Ceramic Cap.,0805 Kemet C0805X101KDRACTU

13 1 C15 15pF COG-NP0,50V

Chip Ceramic Cap.,0805 VISHAY VJ0805A150JXACW1BC

14 4 C16, C17, C18,C19 470µF, 100V Electr. Cap., Ø

16x25xp7.5 Panasonic ECA2AM471

15 1 C20 220nF X7R,100V

Chip Ceramic Cap.,0805 Kemet C0805X224K1RACTU

16 1 C21 220µF, 25V Electr. Cap., Ø6.3x11xp2.5 Rubycon 25YXJ220M6.3X11

17 1 C22 1nF-1KV,300Vac

Cap. Disk Ceram., Ø7.5xp10 Vishay VY2102M29Y5US6TV7

18 2 C25, C26 470pF COG-NP0, 100V

Chip Ceramic Cap.,0603 Kemet C0603C471J1GACTU

19 1 C27 4.7µF, 100V Electr. Cap., Ø5x11xp2 Nichicon UPS2A4R7MDD

20 3 C28, C29, C32 10µF, 35V Electr. Cap., Ø5x11xp2 Nichicon UVZ1V100MDD

21 2 C30-C34 10nF X7R, 50V Chip Ceramic Cap.,0805 Samsung CL21B103KBANNNC

22 1 C31 1µF X7R, 25V Chip Ceramic Cap.,0805 Samsung CL21B105KAFNNNE

AN5467Bill of materials

AN5467 - Rev 1 page 25/35


23 1 C35 47nF X7R, 50V Chip Ceramic Cap.,0805

MULTICOMPPRO MC0805B473M500CT

24 1 D1 - High VoltageRectifier, SMB ST STPS1H100U

25 1 D2 - High FrequencyRectifier, D2pak ST STTH30R03CG

26 1 D3 - Bridge Rectifier,GBU Vishay GBU4K-E3/45

27 1 D4 - Transil, DO-201 ST 1.5KE300A

28 1 D5 - High VoltageRectifier, SMA ST STTH108A

29 9D6, D7, D9, D19,D20, D21, D22,D23, D10

- Signal Diode,SOD-80

ONSEMICONDUCTOR

LL4148

30 1 D8 16V Zener Diode,SOD-80 Vishay TZM5246B-GS08

31 1 D11 - Zener Diode, DO-41 Vishay BZX85B82

32 1 D13 - Shottky Rectifier,SOD-123 ST STPS0560Z



35 1 D17 5.6V Zener Diode,SOD-80 Vishay TZM5232B-GS08

36 1 D18 - Power ShottkyRectifier, SMA ST STPS2H100A

37 1 D24 68V Zener Diode, SMB Vishay SMZJ3809B

38 1 F1 2A Fuse Wickmann 38212000410

39 1 - - Fuseholder Wickmann 55900000001

40 1 HS1 - Heat Sink TO220 forPCB, diss-7141

AavidThermalloy 7141DG

41 2 J1, J2 -

PM 5.08/03/903.5SN BK BX, PCBTerminal 3 waysp.5.08mm

Weidmuller PM 5.08/03/90 3.5SN BKBX

42 1 J5 -

PM 5.08/02/903.5SN BK BX, PCBTerminal 2 waysp.5.08mm

Weidmuller PM 5.08/02/90 3.5SN BKBX

43 1 J12 -Female Receptacle4 poles, 4 way x2.54mm

FischerElektronik BL5.36Z

44 1 L1 20mH 1.5A Common ModeChoke, 28x28xH22.9 Schaffner EH28-1.5-02-20M

45 1 L2 560µHInductor,Ø20.32xh22.86xp14.48

COILCRAFT PCV-2-564-02L

46 1 Q1 - Power Mos N-Chanel, TO220FP ST STF23N80K5


AN5467 - Rev 1 page 26/35

https://www.st.com/en/product/STPS1H100?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467

https://www.st.com/en/product/stth30r03?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467

https://www.st.com/en/product/1-5KE?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467

https://www.st.com/en/product/STTH108?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467

https://www.st.com/en/product/STPS0560Z?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467

https://www.st.com/en/product/STPS2H100?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467



47 1 Q2 -Power Mos N-Chanel, Power Flat3.3x3.3

ST STL4N10F7

48 1 Q3 - Power Mos N-Chanel, SOT23

ONSEMICONDUCTOR

2N7002

49 2 Q5-Q19 - NPN Transistor,SOT23

ONSEMICONDUCTOR

BC817-25LT3G

50 1 Q7 -

Dual Power Mos N-Chanel,PowerFLAT™ 5x6Double

ST STL20DN10F7

51 1 Q16 - PNP Transistor,SOT23 DIODES INC. MMBT3906-7-F

52 1 Q18 - NPN transistor,SOT23 DIODES INC. MMBT3904-7-F

53 1 RV1 S10 300K,470Vac

Varistor, Ø12 x5.1mm EPCOS B72210S0301K101

54 1 R2 10M Chip Resistor, 1206 YAGEO RC1206FR-0710ML

55 1 R16 0R0 Chip Resistor, 1210 Vishay CRCW12100000ZSTA

56 1 R4 0R0 Chip Resistor, 1206 Vishay CRCW12060000Z0EA

57 2 R5, R6 47K Chip Resistor 0.01,0805 YAGEO RC0805FR-074K7L

58 2 R8, R9 220R Chip Resistor, 0805 YAGEO RC0805FR-07220RL

59 3 R10, R11, R37 0R33 Chip Resistor, 2512 Panasonic ERJ1TRQFR33U

60 1 R12 56K Chip Resistor, 1206 YAGEO RC1206FR-0756KL

61 1 R13 470R Chip Resistor, 0805 YAGEO RC0805FR-07470RL

62 1 R14 20K 0.01 Chip Resistor, 0805 YAGEO RC0805FR-0720KL


64 1 R61 24K Chip Resistor, 0805 Vishay RC0805FR-0724KEA

65 2 R17, R60 750R Chip Resistor, 0805 MULTICOMPPRO MCWR08X7500FTL

66 1 R23 0R0 Chip Resistor, 1210 Vishay CRCW12100000ZSTA

67 2 R35-R27 1K Chip Resistor, 1206 YAGEO RC1206FR-071KL

68 2 R36, R54 0R0 Chip Resistor, 0805 Vishay CRCW08050000Z0EA

69 3 R38, R49, R56 100K Chip Resistor, 0805 YAGEO RC0805FR-07100KL



72 5 R41, R43, R57,R62, R63 1K Chip Resistor, 0805 YAGEO RC0805FR-071KL

73 1 R52 0R33 Chip Resistor, 1206 BOURNS CRL1206-FW-R330ELF

74 1 R42 0R36 Chip Resistor, 1206 BOURNS CRL1206-FW-R360ELF

75 1 R44 2K7 Chip Resistor, 0805 YAGEO RC0805FR-072K7L


77 1 R46 300K Chip Resistor, 0805 PANASONIC ERJ6ENF3003V


AN5467 - Rev 1 page 27/35

https://www.st.com/en/product/stl4n10f7?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467

https://www.st.com/en/product/stl20dn10f7?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467



79 1 R51 4K3 Chip Resistor, 0805 Vishay CRCW08054K30FKEA.

80 1 R55 1M Chip Resistor, 0805 YAGEO RC0805FR-071ML



83 14

TP1, TP2, TP3,TP4, TP5, TP6,TP7, TP8, TP11,TP12, TP13,TP15, TP16,TP17

- Test Point Red,TH-5000 KEYSTONE 5000

84 2 TP9, TP10 - Test Point Black,TH-5001 KEYSTONE 5001

85 1 T1 - Transformer HF,37x47xH24.5mm Magnetica 2295.0004

86 1 U2 - High perform. CMLED control, SO8 ST HVLED002

87 1 U3 - High PF flybackcontrol, SSOP-10 ST HVLED001B

88 1 U5 - Adjust VoltageReference, SOT23 ST TL431AIL3T

89 1 U6 - Voltage Regulatorwith INH, DPAK ST LF33AB

90 3 - H15mm Spacer Richco TCBN-T1-M3-8-15

91 1 - - PCB CB06.V02,198mmx50mm FR4 - -

Table 4. STEVAL-LLL008C1 bill of materialsThe STEVAL-LLL008C1 board is supplied with the STEVAL-LLL008V1 kit and is not available for separate sale


1 7C37, C38, C40,C42, C43, C44,C50

100nF, 50V CAP CER X7R0805, SMD 0805 Yageo CC0805KRX7R9BB104

2 2 C39, C41 2.2pF, 50V CAP CER NP00805, SMD 0805 AVX Corporation 08055A2R2BAT2A

3 2 D21, D22 CLEAR

LED AMBERCLEAR 5MMROUND T/H, TH2.5mm

Cree C503B-AAN-CA0C0252-015

4 1 D23 (notmounted) 75V Diode, DO-213AA - DNM

5 1 J3 5X2CONN HEADERVERT 10POS1.27MM, TH

CNC Tech 3220-10-0100-00

6 1 J4TERM BLOCKPLUG 4POSSTR 2.5MM

CONN HEADER R/A4POS 2.54MM, TH

WurthElectronics 61300411021

7 1 RT1 (notmounted) NTC TH - DNM


AN5467 - Rev 1 page 28/35



https://www.st.com/en/product/tl431?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467

https://www.st.com/en/product/lfxx?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467


8 3 R52, R54, R63 10K, 1/8W, ±1% RES SMD 0805,SMD0805 Yageo RC0805FR-0710KL

9 3 R53, R57, R58 1K, 1/4W, ±1% RES 0805,SMD0805

StackpoleElectronics Inc RNCP0805FTD1K00

10 1 R59 (notmounted) 1K, 1/4W, ±1% RES 0805,

SMD0805 - DNM

11 1 SW1 15V, 0.02A SWITCH TACTILESPST-NO, SMD Panasonic EVP-AA402W

12 1 U8 -IC MCU 32BIT192KB FLASH,UFQFPN32

ST STM32L071KZU6-TR

13 1 U10 868MHz Transceiver Module,SMD ST SPSGRFC-868

14 1 Y1

32.768kHz±20ppm 12.5pF30 kΩ -10°C ~60°C

CRYSTAL ThroughHole Cylindrical Can,Radial, TH

Abracon LLC AB38T-32.768KHZ

15 1 - 868MHzRF ANTENNA868MHZ WHIP STRCAB PAN

Linx Technology ANT-868-PW-QW-UFL


AN5467 - Rev 1 page 29/35

https://www.st.com/en/product/stm32l071kz?ecmp=tt9470_gl_link_feb2019&rt=an&id=AN5467


Revision history

Table 5. Document revision history

Date Version Changes

28-May-2020 1 Initial release.

AN5467

AN5467 - Rev 1 page 30/35

Contents

1 LED street lighting in Smart City applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

2 Schematic diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

3 STEVAL-LLL008V1 evaluation board layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

4 STEVAL-LLL008V1 power board overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

4.1 HPF Flyback stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.2 Inverted Buck stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.3 External On/Off and dimming control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.4 Protection circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5 STEVAL-LLL008V1 power inputs and outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

5.1 Flyback operation only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.2 Flyback and buck converter operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

6 STEVAL-LLL008V1 performance and efficiency measurements . . . . . . . . . . . . . . . . . . . .10

7 STEVAL-LLL008V1 waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

7.1 Power-on and power-off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

7.2 Steady State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7.3 Current and voltage ripple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

7.4 Short-circuit overcurrent protection and overvoltage protection (OVP) . . . . . . . . . . . . . . . . . 17

8 STEVAL-LLL008V1 with MCU board on J12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

8.1 Dimming on pin2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

8.2 EN Control_ON/OFF on pin 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

9 STEVAL-LLL008V1 power board EMI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

10 STEVAL-LLL008V1 input current harmonics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

11 STEVAL-LLL008V1 power board thermal maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

12 Bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

AN5467Contents

AN5467 - Rev 1 page 31/35

List of figuresFigure 1. STEVAL-LLL008V1 evaluation kit power board and control board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Figure 2. LED street lighting application with high voltage LED controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Figure 3. STEVAL-LLL008V1 power board schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Figure 4. STEVAL-LLL008V1 control board schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Figure 5. STEVAL-LLL008V1 power board top side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Figure 6. STEVAL-LLL008V1 power board bottom side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Figure 7. STEVAL-LLL008V1 evaluation board connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Figure 8. STEVAL-LLL008V1 efficiency with ILED=1.4 A at 40 VOUT and 70 VOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Figure 9. STEVAL-LLL008V1 efficiency at 70 VOUT with 5%-100% dimming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Figure 10. STEVAL-LLL008V1 Total Harmonic Distortion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Figure 11. STEVAL-LLL008V1 Power Factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Figure 12. STEVAL-LLL008V1 output voltage regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Figure 13. 90 VIN_AC at 70 V-1.4 A power on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Figure 14. 265 VIN_AC at 40 V-1.4 A power on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Figure 15. 90 VIN_AC at 40 V-1.4 A power off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Figure 16. 265 VIN_AC at 70 V-1.4 A power off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Figure 17. 90 VIN_AC at 70 V-1.4 A steady state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figure 18. 265 VIN_AC at 40 V-1.4 A steady state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figure 19. 90 VIN_AC at 70 V-1.4 A input current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figure 20. 265 VIN_AC at 70 V-1.4 A input current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figure 21. 90 VIN_AC at 40 V-1.4 A input current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Figure 22. 265 VIN_AC at 40 V-1.4 A input current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Figure 23. 90 VIN_AC at no load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Figure 24. 265 VIN_AC at no load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Figure 25. 265 VIN_AC at 70 V-1.4 A primary VDS maximum spike . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Figure 26. 90 VIN_AC at 70 V-1.4 A ILED ripple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Figure 27. 265 VIN_AC at 40 V-1.4 A ILED ripple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Figure 28. 90 VIN_AC at 70 V-1.4 A VOUT ripple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Figure 29. 265 VIN_AC at 40 V-1.4 A VOUT ripple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Figure 30. 90 VIN_AC at 70 V-1.4 A short-circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Figure 31. 265 VIN_AC at 40 V-1.4 A short-circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Figure 32. 90 VIN_AC at 70V-1.4 short-circuit thermal map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 33. 265 VIN_AC at 70 V-1.4 A short-circuit thermal map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 34. 90 VIN_AC at 40 V-1.4 A short removed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 35. 265 VIN_AC at 70 V-1.4 A short removed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 36. Dynamic OVP during start-up operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Figure 37. 90 VIN_AC at 70 V-1.4 A 100% dimming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Figure 38. 90 VIN_AC at 70 V-1.4 A 100% dimming (zoom). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Figure 39. 115 VIN_AC at70 V 75% dimming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Figure 40. 230 VIN_AC at70 V 25% dimming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Figure 41. 265 VIN_AC at 70 V 1% dimming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Figure 42. 265 VIN_AC at 70V ILED=100% disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Figure 43. 90 VIN_AC at 70V ILED=50% enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Figure 44. 115 VIN at full load EMI - neutral . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Figure 45. 230 VINat full load EMI - phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Figure 46. 100 VIN harmonic at full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Figure 47. 230 VIN harmonic at full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Figure 48. 115VIN_AC at 70 V-1.4 A - top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

AN5467List of figures

AN5467 - Rev 1 page 32/35

Figure 49. 230VIN_AC at 70 V-1.4 A - top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 50. 115 VIN_AC at70 V-1.4 A - bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 51. 230 VIN_AC at70 V-1.4 A - bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

AN5467List of figures

AN5467 - Rev 1 page 33/35

List of tablesTable 1. STEVAL-LLL008V1 power board electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Table 2. STEVAL-LLL008V1 Connectors and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Table 3. STEVAL-LLL008P1 bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Table 4. STEVAL-LLL008C1 bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Table 5. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

AN5467List of tables

AN5467 - Rev 1 page 34/35

IMPORTANT NOTICE – PLEASE READ CAREFULLY

STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to STproducts and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. STproducts are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement.

Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design ofPurchasers’ products.

No license, express or implied, to any intellectual property right is granted by ST herein.

Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product.

ST and the ST logo are trademarks of ST. For additional information about ST trademarks, please refer to www.st.com/trademarks. All other product or servicenames are the property of their respective owners.

Information in this document supersedes and replaces information previously supplied in any prior versions of this document.

© 2020 STMicroelectronics – All rights reserved

AN5467

AN5467 - Rev 1 page 35/35

http://www.st.com/trademarks

100 W high efficiency and low THD dimmable LED driver … · STEVAL-LLL008V1 evaluation kit power...

Documents

Transcript of 100 W high efficiency and low THD dimmable LED driver … · STEVAL-LLL008V1 evaluation kit power...