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SY5839 - Single Stage Buck PFC Controller

Description

The SY5839 is a single stage Buck PFC controller targeting at LED lighting applications.

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.

Features

  • Valley turn-on of the MOSFET to achieve low switching losses.
  • Power factor >0.90 with single-stage conversion.
  • Low start up current: 15µ A typical.
  • Quick start up.

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Datasheet preview – SY5839

Datasheet Details

Part number SY5839
Manufacturer Silergy
File Size 672.84 KB
Description Single Stage Buck PFC Controller
Datasheet download datasheet SY5839 Datasheet
Additional preview pages of the SY5839 datasheet.

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Full PDF Text Transcription

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Application Notes: AN_SY5839 Single Stage Buck PFC Controller For LED Lighting Preliminary datasheet General Description The SY5839 is a single stage Buck PFC controller targeting at LED lighting applications. 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. It adopts special design to achieve quick start up and reliable protection for safety requirement.
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