This post explains for the LED Controller.
The Part Number is BP2822.
The function of this semiconductor is Non-isolated Buck LED constant current controller.
The package is DIP 8 Pin Type
Manufacturer: BPS ( http://www.bpsemi.com/ )
Preview images :
The BP2822 is a high-precision LED constant current control chip, used in non-isolated step-down LED power supply systems, suitable for full-range AC voltage input or 12V~600V DC voltage input.
The BP-2822 integrates a 600V power MOSFET inside, requiring only a few external components to achieve excellent constant current characteristics.
1. Built-in 600V power MOSFET
2. Source drive, no need for auxiliary winding power supply
3. Up to ±3% LED current accuracy
4. Up to 93% system efficiency
5. LED short circuit protection
6. CS sampling resistor short circuit protection
7. Chip over temperature protection