PT4219 Description
The PT4219 is a primary side constant current controller which can achieve high power factor in a single stage converter, targeted to applications in solid state lighting. It is designed for the flyback topology, and regulates output current accurately without the secondary feedback loop. PT4219 works in quasi-resonant mode to reduce the MOSFET switching loss.
PT4219 Key Features
- Constant Current Control Without Secondary Feed back Accurate Constant Current Output Quasi-Resonant Mode Operation Ultr