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PT4219

Part Number	PT4219
Manufacturer	PowTech
Description	Primary Side Offline LED Controller
Published	Jul 21, 2014
Detailed Description	PT4219 Primary Side Offline LED Controller with Active PFC GENERAL DESCRIPTION The PT4219 is a primary side constant cur...
Datasheet	PT4219 PDF File

Overview

PT4219 Primary Side Offline LED Controller with Active PFC GENERAL 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.
The device uses extremely low startup and low quiescent current to achieve high efficiency.
A complete set of integrated protection functions allows the PT4219 to protect against all fault conditions such as VCC under-voltage, VCC over-voltage, cycle by cycl...

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