供应非隔离带高PFC恒流驱动方案SY5804A
SY5804A
General DeSCRJPTion
The SY5804A is a single stage Buck PFC controller targeting at LED lighting applications. It drives the Buck converter in the quasi-resonant mode to achieve higher efficiency. It keeps the Buck converter in constant on time operation to achieve high power factor.
Features
* Valley turn-on of the MOSFET to achieve low switching losses
* 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
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