SY5800A Overview
The SY5800A is a single stage Flyback and 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.
SY5800A Key Features
- Primary side control eliminates the opto-coupler
- Valley turn-on of the primary MOSFET to achieve
- 0.3V primary current sense reference voltage leads
- 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
- pact package: MSOP10 and SO8