UCC24624 Overview
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.
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 rejection
- Two-channel interlock to prevent shoot-through
- Integrated 1.5-A source and 4-A sink capability gate driver for N-channel MOSFETs
- 8-pin SOIC package
