SY5882FAC中文资料Single Stage Flyback and PFC Controller with Primary Side Control for LED Lighting and Multiple Dimming Mode Option数据手册Silergy规格书

描述 Description

The SY5882 is a single stage Flyback and PFC controller targeting at LED Dimming applications, which can achieve up to 5% dimming level and high precision for all loading range. It is a primary side controller without applying any secondary feedback circuit for low cost, and drives the converter in the quasi-resonant mode to achieve higher efficiency. It keeps the converter in constant on time operation to achieve high power factor.

特性 Features

• 5.5%~100% Dimming Range.
• CV mode for Bias supply at <5% Dimming Signal.
• Primary side control eliminates the opto-coupler.
• Valley turn-on of the primary MOSFET to achieve low switching losses
• 0.3V primary current sense reference voltage leadsto a lower sense resistance thus a lower conduction loss.
• Internal high current MOSFET driver:0.19A sourcing and 0.63A sinking
• Low start up current:34uA typical
• Reliable short LED and Open LED protection
• Power factor>0.90 with single-stage conversion.(Analog dimming only)
• Compact package: SO8

应用 Application

• LED Dimming