UCC2540 - Texas Instruments

UCC2540 High-Efficiency Secondary Side Synchronous PWM Controller

The UCC2540 is a secondary-side synchronous buck PWM controller for high current and low output voltage applications. It can be used either as the local secondary-side controller for isolated dc-to-dc converters using two-stage cascaded topologies or as a secondary-side post regulator (SSPR) for multiple output power supplies. The UCC2540 runs with the synch.

Features

D On-Chip Predictive Gate Drivet for High-Efficiency Synchronous Buck Operation D Dual ±3-A TrueDrivet Outputs D 1-MHz High Frequency Operation with 70-ns Delay from SYNCIN to G1 Output D Leading Edge Modulation D Overcurrent Protection using a Parallel Average Current Mode Control Loop D 3 Modes to Support 2.7-V to 35-V Bias Operation D Reverse Current Protection for Output Stage D User Programmable Shutdown D ±1.0% Initial Tolerance Bandgap Reference D High Bandwidth Error Amplifiers D Thermally Enhanced HTSSOP 20-Pin PowerPADt Package SIMPLIFIED APPLICATION DIAGRAM APPLICATIONS D Secondary.