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PN8571 - Internal BJT Low Standby-Power QR Primary-side Converter

General Description

The PN8571 consists of a Low Standby-Power QuasiResonant(QR) Primary-Side controller and BJT, specifically designed for a high performance AC/DC charger or adapter with minimal external components.

PN8571 operates in primary-side sensing and regulation, so opto-coupler and TL431 could be eliminated.

Key Features

  • Vo 100% ±5% 60% ±5% Features.
  • Internal BJT switch.
  • Multi-mode and Quasi-Resonant technique.
  • ±5% CC Regulation at Universal AC input.
  • Primary-side Sensing and Regulation without TL431 and Opto-coupler.
  • Programmable Cable Drop Compensation.
  • No-need Control Loop Compensation Capacitor.
  • Excellent Protection include:.
  • Over Temperature Protection (OTP).
  • VDD Under/Over Voltage Protection(UVLO&OVP).
  • Cycle-by-Cycle Current Limiting (OCP).
  • CS Sho.

📥 Download Datasheet

Datasheet Details

Part number PN8571
Manufacturer Chipown
File Size 446.74 KB
Description Internal BJT Low Standby-Power QR Primary-side Converter
Datasheet download datasheet PN8571 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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PN8571 Chipown Internal BJT Low Standby-Power QR Primary-side Converter General description The PN8571 consists of a Low Standby-Power QuasiResonant(QR) Primary-Side controller and BJT, specifically designed for a high performance AC/DC charger or adapter with minimal external components. 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 compensation. In CC mode, the current and output power setting can be adjusted externally by the sense resistor at CS pin.