主要特点
- Valley turn-on of the MOSFET to achieve low switching losses
- Aux-winding for ZCS detection and bias current optional
- 0.3V current sense reference voltage leads to a lower sense resistance thus a lower conduction loss
- Internal high current MOSFET driver: 1A sourcing and 2A sinking
- Low start up current: 15µA typical
- Reliable short LED and Open LED protection
- Power factor >0.90 with single-stage conversion
- Compact package: SO8
主要应用
概述
The SY5803 is a single stage Buck-Boost PFC controller targeting at LED lighting applications. It drives the Buck-Boost converter in the quasi-resonant mode to achieve higher efficiency. It keeps the Buck-Boost converter in constant on time operation to achieve high power factor.
Applications
- LED lighting
- Down light
- Tube lamp
- PAR lamp
- Bulb lamp