HB5814

Single-stage Buck Controller HB5814 HB5814 overview for non-isolated LED lighting is a single-stage, high-precision LED constant current control chip with active power factor correction for 85VAC-265VAC full range input voltage non-isolated BUCK LED power structure. As a result of the critical continuous inductor current mode, power MOS at zero current state, the switching losses can be reduced, while increasing the efficiency of the transformer. Using a constant on-time mode of operation allows the simplification of peripheral circuits and high power factor correction. Chip provides multiple protection detection function can achieve high reliability LED lighting systems. Feature can be used to achieve a single-stage PFC converter> 0.90 power factor correction non-isolated ultra-low BUCK architecture startup current (typically 12uA) 0.8A / 1.6A MOSFET driver capacity current critical continuous mode to achieve low switching losses short and open LED protection primary side-by-cycle current limiting output voltage chip power supply flows through the COMP fast clamping overvoltage and undervoltage protection over temperature protection automatic restart function ISEN electrical short-circuit detection gate drive voltage clamp 11V, lower switching losses using TSOT23-6 package , minimalist peripheral applications. Application GU10 / E27 LED bulb lights, spotlights LED PAR30, PAR38 LED fluorescent lamp LED lighting Other