PN8571
description
The PN8571 consists of a Low Standby-Power Quasi Resonant(QR) Primary-Side controller and BJT, specifically designed for a high performance AC/DC charger or adapter with minimal external ponents.
PN8571 operates in primary-side sensing and regulation, so opto-coupler and TL431 could be eliminated. In CV mode, multi-mode and quasi resonant technique is utilized to achieve high efficiency, avoid audible noise and make the system meeting Energy star level VI. Good load regulation is achieved by the built-in cable drop pensation. In CC mode, the current and output power setting can be adjusted externally by the sense resistor at CS pin.
PN8571 offers plete protections including Cycle-by Cycle current limiting protection (OCP), over voltage protection (OVP), open loop protection (OLP), over temperature protection (OTP) and CS open or short protection (CS O/SP) etc.
Application
- Switch AC/DC Adapter
- Battery Charger
- Set-top box power supply
Output Features
Vo...
