产品概述

描述

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.

所有功能
Wide input voltage range 85 – 265 V_AC

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 V_AC

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
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	产品型号	状态	描述	类型	供应商
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