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STEVAL-LLL004V1

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75 W digitally controlled constant current LED driver reference design

Quantity $ per Unit Savings
1 - 2$138.420%
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In stock
$138.43
Parameter NameParameter Value
Target ApplicationLED Lighting
Core ProductSTD11N60M2-EP, VIPER012LS
ECCN US3A991.a.2
ECCN EUNEC
Packing TypeNot Applicable
ROHS Compliance GradeEcopack2
GradeIndustrial
Package NameCARD

The STEVAL-LLL004V1 digitally controlled constant current LED driver reference design features a PFC stage and two DC-DC converters designed to work in transition mode (TM) for optimal efficiency.


The LED driver can deliver 75 W output power and implements both analog and digital techniques for flicker free dimming down to 0.5% of the maximum brightness level. The board features high efficiency, a very high power factor above 0.97, and a low THD across wide input voltage and load conditions, thanks to the high performance ST power products and the advanced algorithms running on the 32-bit STM32F0 microcontroller.

Key features
  • Wide input voltage range 85 – 265 VAC
  • Transition Mode PFC
  • Two constant current outputs working in transition mode based on different topologies:
    • Buck topology
    • Inverse buck topology
  • Output current: 500 mA ±2.5%
    • Number of LEDs connected at output: 16 – 24 white LEDs (3.3 V each)
  • PFC > 0.97 and THD < 20% at full load with input voltage 85-265 VAC
  • Peak Efficiency at maximum load ≅ 90%
  • Comprehensive safety protections:
    • Open/no-load circuit protection
    • Short-/overload circuit protection
  • Soft start implementation
  • LED dimming range: 0.5% to 100%
    • Analog dimming
    • Digital dimming
  • Dimming control options:
    • Push button
    • 0-10 V input
  • Meets EN55022 Class B
  • WEEE and RoHS compliant