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AP39303 - QUASI-RESONANT PWM SWITCHER

General Description

The AP39303 is a highly integrated power switcher with a built-in Quasi-Resonant (QR) PWM controller and a 700V high performance power MOSFET.

AP39303 is specially designed for offline power supply that requires ultra-low standby power, high-power density and comprehensive protection.

Key Features

  • are included, such as brown out protection, cycle-by-cycle current limit, VCC Over Voltage Protection (VOVP), Secondary-side Output OVP (SOVP) and UVP (SUVP), internal OTP, Over Load Protection (OLP) and pins’ fault protection. Combined with Diodes Incorporated’s synchronous controller APR347, AP39303 system can achieve the higher power conversion efficiency and the better thermal performance. Features.
  • Quasi-Resonant Operation under all Line and Load Condition.
  • Peak Current Mode Contr.

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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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NEW PRODUCT A P39303 Description The AP39303 is a highly integrated power switcher with a built-in Quasi-Resonant (QR) PWM controller and a 700V high performance power MOSFET. AP39303 is specially designed for offline power supply that requires ultra-low standby power, high-power density and comprehensive protection. Coordinating with secondary side USBPD or quick charger controller to provide a Flyback charger solution. At no load or light load, the IC will enter the burst mode to minimize standby power consumption. The minimum switching frequency (typical: 24kHz) is set to avoid the audible noise. When the load increases, the IC will enter QR mode with frequency foldback to improve system efficiency and EMI performance.