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NCP1345 - High-Voltage Quasi-Resonant Flyback Controller

General Description

The controller enters fault mode if the voltage on this pin is pulled above or below the fault thresholds.

precise pull up current source allows direct interface with an NTC thermistor.

Feedback input for the QR Flyback controller.

Key Features

  • a precise, primary side based output current limiting circuit to ensure a constant output current limit regardless of programmed output voltage, or nameplate output power. The quasi.
  • resonant (QR) current.
  • mode flyback stage features proprietary valley.
  • lockout circuitry to ensure stable valley switching down to the 6th valley, then transitions to frequency foldback mode to reduce switching losses. As the load decreases further, the NCP1345 enters skip mode to manage the pow.

📥 Download Datasheet

Datasheet Details

Part number NCP1345
Manufacturer onsemi
File Size 953.32 KB
Description High-Voltage Quasi-Resonant Flyback Controller
Datasheet download datasheet NCP1345 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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High-Voltage Quasi-Resonant Flyback Controller With USB-PD Optimization NCP1345 The NCP1345 is a highly integrated quasi−resonant flyback controller suitable for designing high−performance off−line USB−PD and USB Type−C power converters. The included dual−pin VCC architecture allows direct connection to the aux winding for simplified VCC management with a reduced parts count and increased performance. The NCP1345 also features a precise, primary side based output current limiting circuit to ensure a constant output current limit regardless of programmed output voltage, or nameplate output power.