矽力杰华南区一级代理

The SY5814A 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: 0.25A

sourcing and 0.5A sinking

• Low start up current: 15µA typical

• Reliable short LED and Open LED protection

• Power factor >0.90 with single-stage conversion.

• Compact package: SOT23-6