UCC24636

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design UCC24636 SLUSCG2A – MARCH 2016 – REVISED MARCH 2016 UCC24636 Synchronous Rectifier (SR) Controller With Ultra-Low Standby Current 1 Features 1 Secondary-Side SR Controller Optimized for 5-V to 24-V Output Discontinuous/Transition Mode Only Flyback Converters Volt-Second Balance Control Enables Highest Rectifier Efficiency Compatible with PSR and SSR Flyback Controllers Ultra Low 110-µA Standby Current Consumption Auto-Detect Standby Mode Disables SR Switching for Lower No-Load Power Consumption SR Turn-Off Independent of RDSON and Parasitic Inductance Operating Frequency Up to 130 kHz Wide VDD Range from 3.6 V to 28 V Adaptive Gate Drive Clamp Open and Short Pin Fault Protection 2 Applications AC/DC Adapters For Smartphones and Tablets USB Chargers with Type-C Connectors Notebook and Ultrabook Adapters High Efficiency Flyback Converters in Industrial SMPS High Efficiency Auxilliary Power In Server and Desktop Applications 3 Description The UCC24636 SR is a compact, 6-pin secondaryside synchronous rectifier MOSFET controller and driver for high efficiency Flyback converters operating in Discontinuous (DCM) and Transition mode (TM). Unlike traditional SR controllers which measure the SR MOSFET drain voltage, UCC24636 implements a volt-second balance control method to determine the turn off transition of the SR MOSFET; hence, SR conduction ti...