Features

•

System architecture based on transition mode boost PFC, half bridge LCC and

synchronous rectification (full bridge)

•

•

Output can be configured in constant current (CC) or constant voltage (CV)

mode:

–

300 W maximum O/P power rating

–

CV mode: 48.5 V ± 1%

–

CC mode: 6.25 A ± 2.5% with voltage drop from 36 to 48 V

•

Peak efficiency >93.5%

•

Power Factor > 0.9 for load > 33% of max. load of the input voltage range

•

THD < 20% for load > 25% of max. load of the input voltage range

•

Dimming control in CC mode configuration:

–

0-10 V control

–

1% resolution

–

analog dimming

•

Soft start

•

Protections: I/P and O/P under and overvoltage protection, O/P open/no load

circuit protection, O/P short/overload circuit protection

•

Digitally controlled by STM32F334R8

•

RoHS compliant

•

WEEE compliant (2012/19/UE RAEE II)

Description

The STEVAL-LLL009V1 digitally controlled 300 W power supply consists of power

factor correction (PFC) and half-bridge LCC resonant converter power stages.

An STM32F334R8 microcontroller implements DC-DC and output synchronous

rectification digital control, while the PFC is driven in transition mode by the L6562AT

controller. The system supports constant voltage (CV) and constant current (CC)

operation.

MDmesh K5 and MDmesh DK5 Power MOSFETs are used in the PFC and LCC

half-bridge, respectively, to ensure maximum efficiency, while the STripFET F7 Power

MOSFET is employed to reduce conduction losses in the synchronous rectification

stage on the secondary side.

Both the primary and secondary sections are supplied by an off-line flyback

circuit based on VIPER267KDTR high voltage converter for ultra-wide input which

provides regulated voltages to the control board, the gate driver ICs and the signal

conditioning circuits.

Formal testing and measurement results confirm the ability and performance of

ST power products combined with comprehensive digital control to deliver high

efficiency, power factor near unity, and low THD across wide input voltage and load

conditions.

Product summary

300 W output digitally

controlled HV AC

Input HB LED driver

STEVAL-

LLL009V1

Firmware for STEVAL-

LLL009V1 based on

STM32F334R8 MCU

STSW-

LLL009FW

Mainstream mixed

signal MCU ARM

Cortex-M4 core with

DSP and FPU

STM32F334R8

Galvanically isolated

4 A half-bridge dual

channel gate driver

STGAP2D

N-channel 950 V,

0.275 Ohm typ., 17.5

A MDmesh DK5

Power MOSFET in

TO-247 package

STW20N95DK5

N-channel 950 V,

0.275 Ohm typ., 17.5

A MDmesh K5 Power

MOSFET

STW20N95K5

N-channel 100 V,

0.0068 Ohm typ., 80

A STripFET F7

Power

MOSFET in

TO-220 package

STP100N10F7

300 W very high AC input voltage LED driver with digital power control

STEVAL-LLL009V1

Data brief

DB4318 - Rev 1 - November 2020

For further information contact your local STMicroelectronics sales office.

www.st.com

Applications

LED Lighting and

Controls