HT7L4661 Active PFC Non-isolation Buck LED Lighting Driver With Dimming Function
Feature
• Non-isolation buck topology...
HT7L4661 Active PFC Non-isolation Buck LED Lighting Driver With Dimming Function
Feature
Non-isolation buck topology
Wide AC input range − from 85VAC to 265VAC High Power Factor of >0.9 without additional
circuitry
Internal 650V high
voltage JFET for quick startup
Provides 5V LDO output
Accurate constant current (< ±3%)
Includes linear dimming function
Low operating current to maximise conversion efficiency
Under-
voltage lockout with hysteresis
Full protection functions for enhanced safety –– Maximum gate drive output clamp –– VCC over
voltage protection − VCC OVP –– VCC under-
voltage lockout with hysteresis − VCC UVLO –– Output LED string over current protection –– Output LED string short protection –– Output LED string open protection –– CS, ZCD pins open protection –– On-chip Vver temperature protection − OTP
Small 10-pin MSOP package
Applications
General illumination
E26/27,...
