Internal HV Start-up High-accuracy Primary-Side Converter
for LED without Auxiliary Winding--PN8328

一、General Description

The PN8328 consists of a high precision CC primary side controller and a power MOSFET, specifically designed for a high
performance low power LED lighting with minimal external components and duplex winding. The chip operates in primary-side
sensing 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 automatic
self-recovery feature including Cycle-by-Cycle current limiting protection (OCP) and feedback loop open protection (OLP), over
temperature regulation (OTC) , Rcs open/short Protection and LED-open/short circuit protection etc. Internal HV Start-up circuit and
the chip’s very low consumption help to meet high efficiency. In CC control, the current and output power setting can be adjusted
externally by the sense resistor Rcs at CS pin.

二、Features
■ Internal 650V avalanche-rugged power MOSFET
■ Internal HV Start-up Circuit without external HV Start-up
resistance
■ Primary-side Sensing and Regulation Without TL431 and
Opto-coupler
■ Internal HV self-supply without auxiliary winding
■ Patented Built-in Line compensation circuit
■ ±3% Constant current Regulation
■ Adjustable CC Regulation
■ 0.5% precision Line voltage Compensation
■ Built-in Primary winding inductance compensation
■ Excellent Protection Coverage:

三、Applications

LED flat panel lamp
LED external power supply

五、Typical Circuit

FREE HOT LINE:+86-400-788-7770

Tel:+86-769-81150556　　　 Mob:+86-18929103949 Ms Tang
Tel: +86-769-85638990　　　Mob:+86-18923224605  Ms Ye
Email: ye shaoqin@ctc-semi.com       QQ:2485843216

Fax:+86-769-83351643

 

Head office:  No.8, Yanhe East Street, Ailingkan Village, Dalingshan Town,  Dongguan City, Guangdong Province, China

Foshan office: No.169 Rongqi Road,Ronggui Village,Shunde District,Foshan City,Guangdong Province,China

Shenzhen office:Baifuhui Industrial Park,Jianshedonglu Road,Longhua District,Shenzhen City,Guangdong Province,China

Zhongshan office:Shijihaoting,Longchang Road,Dongsheng Village,Zhongshan City,Guangdong Province,China

Hangzhou office:Jiangnanmoka,Wenyan Village,Xiaoshan District,Hangzhou City,Zhejiang Province,China

 

Office Website: www.topctc.com