NCP1345 - High-Voltage Quasi-Resonant Flyback Controller

Product Overview

ON Semiconductor

Datasheet Details

Part number	NCP1345
Manufacturer	ON Semiconductor
File Size	953.32 KB
Description	High-Voltage Quasi-Resonant Flyback Controller
Datasheet	NCP1345 Datasheet
Additional preview pages of the NCP1345 datasheet.

Product details

Description

Pin Name Pin Number Function Fault 1 The controller enters fault mode if the voltage on this pin is pulled above or below the fault thresholds.A precise pull up current source allows direct interface with an NTC thermistor.FB 2 Feedback input for the QR Flyback controller.Allows direct connection to an optocoupler.ZCD/OPP 3 A resistor divider from the auxiliary winding to this pin provides input to the demagnetization detection comparator and sets the OPP compensation level.It

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.

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Published: Sep 1, 2024 |