UCC24624 Datasheet Dual-Channel Synchronous Rectifier Controller

Manufacturer: Texas Instruments

Overview: UCC24624 SLUSD48C – JULY 2018 – REVISED MARCH 2022 UCC24624 Dual-Channel Synchronous Rectifier Controller for LLC Resonant Converters.

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UCC24624 dual-channel synchronous rectifier controller by Texas Instruments - Datasheet Preview

Datasheet Details

Part number	UCC24624
Manufacturer	Texas Instruments
File Size	1.95 MB
Description	Dual-Channel Synchronous Rectifier Controller
Download	UCC24624 Download (PDF)

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.

The UCC24624 SR controller uses drain-to-source voltage sensing method to achieve on and off control of the SR MOSFET.

Proportional gate drive is implemented to extend the SR conduction time, minimize the body diode conduction time.

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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