Internal HV Start-up Primary-Side Converter for LED without Auxiliary Winding

Product：PN8322

一、General Description 

The PN8322 consists of a high precision CC primary side controller and a power MOSFET, specifically designed for a highperformance low power LED lighting with minimal external components and duplex winding. The chip operates in primary-sidesensing and regulation, so opto-coupler and TL431 could be eliminated. The chip adopts a patent HV DMOS self-supply technology,so auxiliary winding and HV Start-up resistance could be eliminated. The chip offers complete protection coverage with automaticself-recovery feature including Cycle-by-Cycle current limiting protection (OCP) and feedback loop open protection (OLP), overtemperature protection (OTP) , and LED-open/short circuit protection etc. Internal HV Start-up circuit and the chip’s very lowconsumption help to meet high efficiency. In CC control, the current and output power setting can be adjusted externally by the senseresistor Rcs at CS pin.

二、Features

Internal 700V avalanche-rugged power MOSFET

Internal HV Start-up Circuit without external HV Start-upresistance

Primary-side Sensing and Regulation Without TL431 andOpto-coupler

Internal HV self-supply without auxiliary winding

±5% Constant current Regulation

Adjustable CC Regulation

Built-in Primary winding inductance compensation

Excellent Protection Coverage:

     Over Temperature Protection (OTP)

     Cycle-by-Cycle Current Limiting (OCP)

     LED open/short Protection

    Auto- recovery protection Mode         

         

三、Applications

GU10 LED spotlight

LED Bulb

四、Package/Order Information

五、Typical Application

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