LZC811

LZC811 PSR & PFC LED Driver Controller General Description Fly-back topology The LZC811 is a single-power stage, Real-Current control to meet accurate isolated and primary side offline LED lighting output current regulator which achieves high power factor. Very less components The proprietary real-current control method Programmable input AC voltage can control the LED current accurately from compensation the primary side information. It can Leading Edge Blanking on CS/FB pin significantly simplify the LED lighting system Protection Features design by eliminating the secondary side Building in hysteresis OTP feedback components and the opto-coupler. VDD over voltage protection The LZC811 integrates active power factor Cycle by cycle current limiting on CS correction and works in Quasi Resonance pin mode (QRM) in order to reduce the Secondary peak current protection MOSFET switching losses. With a building in on CS pin 700V start-up MOSFET, IC can eliminate the Output short to GND protection power loss caused by start-up resistors to Output programmable over voltage provide a high efficiency solution for lighting protection applications. The external programmable FB and CS pins default protection line voltage compensation provides a more Application circuit precise output current throughout the universal AC input voltage range. The leading edge blanking circuit on the CS/FB input removes the signal glitch and results in reduced ext...