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PT4219 - Primary Side Offline LED Controller

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.

Key Features

  • Constant Current Control Without Secondary Feed back Accurate Constant Current Output Quasi-Resonant Mode Operation Ultra-low（10uA）Start Up Current Low Quiescent Current (1mA) VCC Under Voltage Protection Over Voltage Protection by Voltage Holding Cycle by Cycle Current Limit Rcs Open Circuit Protection Transformer Winding Short Circuit Protection Output Open/Short Circuit Protection Over Temperature Protection.

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Datasheet Details

Part number PT4219
Manufacturer PowTech
File Size 315.69 KB
Description Primary Side Offline LED Controller
Datasheet download datasheet PT4219 Datasheet

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Full PDF Text Transcription for PT4219 (Reference)

Note: Below is a high-fidelity text extraction (approx. 800 characters) for PT4219. For precise diagrams, tables, and layout, please refer to the original PDF.

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 facto...

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ry 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.