Single Stage Flyback PFC Controller With Primary Side Regulation and PWM/Analog dimming-Silergy Corp._

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Single Stage Flyback PFC Controller With Primary Side Regulation and PWM/Analog dimming

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Product details

Supply Ability

Warranty(Year)：1 Year

Product Specifications

Product Description

Features

Primary side control eliminates the opto-coupler
PWM or Analog Dimming
Valley turn-on of the primary MOSFET to achieve low switching losses
0.3V primary 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: 15uA typical
Reliable short LED and Open LED protection
Power factor >0.90 with single-stage conversion.(Analog dimming only)
Compact package: SO8

Typical Application

Description

The SY5802 is a single stage Flyback and PFC controller targeting at LED lighting applications with PWM/Analog dimming. It is a primary side controller without applying any secondary feedback circuit for low cost, and drives the Flyback converter in the quasi-resonant mode to achieve higher efficiency. It keeps the Flyback converter in constant on time operation to achieve high power factor.