Dear TI team,
I am currently assessing the feasibility of a project to determine its viability. The project requirements are as follows:
It involves designing an LED driver with the following specifications:
- Input voltage: AC or DC ranging from 12V to 48V.
- Output voltage and current: Capable of driving 11 or 22 LEDs in series within a voltage range of 19V to 82V at a constant current of 350mA.
- Efficiency exceeding 85%.
- Power Factor Correction (PFC) greater than 0.85.
- Operating temperature range of -40°C to 70°C, with storage temperature ranging from -60°C to 85°C.
I seek your guidance on the best topology for this project. Should I consider a sequence of a filter and bridge rectifier, followed by a booster and PFC, or a buck converter, or perhaps an alternative approach?
The LEDs can be controlled by a microcontroller (MCU) and a separate LED driver, utilizing a simple op-amp and MOSFET circuit.
Furthermore, if I opt for a basic bridge rectifier for AC input, and the customer later desires to use DC inputs, I anticipate potential losses in this section.
Your input on the most suitable topology is highly valued.
Best regards,
Farhad
