主要特点
- 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
主要应用
概述
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.
Applications
- LED lighting
- Down light
- Tube lamp
- PAR lamp
- Bulb lamp
