STMicroelectronics STEVAL-LLL004V1 LED Driver
STMicroelectronics STEVAL-LLL004V1 LED Driver is a digitally controlled constant current LED driver. The PFC stage and the two DC-DC converters are designed to work in transition mode to optimize efficiency. The STMicroelectronics LED driver can deliver 75W of output power.
The driver can dim the LEDs to 0.5% of the maximum brightness level through analog and digital approaches. The operation is flicker-free across the entire dimming range using either of the dimming techniques. The board features high efficiency, a power factor almost equal to one, and a low THD percentage across wide input voltage and load conditions. This is thanks to the high-performance ST power products and the advanced algorithms running on the 32-bit STM32F0 microcontroller.
Features
- Wide input voltage range 85–265VAC
- Transition Mode PFC
- Two constant current outputs working in transition mode based on different topologies:
- Buck topology
- Inverse buck topology
- Output current: 500mA ±2.5%
- Number of LEDs connected at output: 16–24 white LEDs (3.3V each)
- PFC > 0.97 and THD < 20% at full load with input voltage 85-265 VAC
- Peak Efficiency at a 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
- 0-10V input
- Meet IEC55022 Class B
- WEEE and RoHS-compliant
Additional Resources
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發佈日期: 2019-01-17
| 更新日期: 2024-01-16