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UCC24624 - Dual-Channel Synchronous Rectifier Controller

General Description

The UCC24624 high-performance synchronous rectifier (SR) controller is dedicated for LLC resonant converters to replace the lossy diode output rectifiers with SR MOSFETs and improve the overall system efficiency.

Key Features

  • 230-V VD pins rating.
  • 23-ns turn-off delay to support LLC operating above resonant frequency and up to 625-kHz switching frequency.
  • Proportional gate drive to extend the SR conduction time.
  • Adjustable turn-off threshold for minimum body diode conduction.
  • Automatic standby mode detection with 180 µA of low standby current.
  • Wide 4.25-V to 26-V VDD operation range with internal clamp.
  • Adaptive turn-on delay for better DCM ring rejectio.

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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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UCC24624 SLUSD48C – JULY 2018 – REVISED MARCH 2022 UCC24624 Dual-Channel Synchronous Rectifier Controller for LLC Resonant Converters 1 Features • 230-V VD pins rating • 23-ns turn-off delay to support LLC operating above resonant frequency and up to 625-kHz switching frequency • Proportional gate drive to extend the SR conduction time • Adjustable turn-off threshold for minimum body diode conduction • Automatic standby mode detection with 180 µA of low standby current • Wide 4.25-V to 26-V VDD operation range with internal clamp • Adaptive turn-on delay for better DCM ring rejection • Two-channel interlock to prevent shoot-through • Integrated 1.