BP3278 is an LED driver chip with high efficiency and high PF value that supports triac dimming. The chip operates in the critical continuous conduction mode of inductive current and is suitable for LED driver power supplies with Boost structure. The BP3278 chip adopts gate drive and high-voltage power supply mode. With only a few peripheral components, it can achieve excellent constant current characteristics, greatly saving system cost and volume. BP3278 has multiple protection functions, including LED open-circuit protection (overvoltage protection), chip temperature overheating adjustment, etc. BP3278 is packaged in SOP-8.