UCC2540 Series
High Efficiency Secondary Side Synchronous Buck PWM Controller
Manufacturer: Texas Instruments
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Key Features
• On-Chip Predictive Gate Drive™ for High-Efficiency Synchronous Buck OperationDual ±3-A TrueDrive™ Outputs1-MHz High Frequency Operation with 70-ns Delay from SYNCIN to G1 OutputLeading Edge ModulationOvercurrent Protection using a Parallel Average Current Mode Control Loop3 Modes to Support 2.7-V to 35-V Bias OperationReverse Current Protection for Output StageUser Programmable Shutdown±1.0% Initial Tolerance Bandgap ReferenceHigh Bandwidth Error AmplifiersThermally Enhanced HTSSOP 20-Pin PowerPAD™ PackageAPPLICATIONSSecondary-Side Post Regulation (SSPR) for Multiple Output Power SuppliesCascaded Buck ConvertersPost Processing Converters for Bus Converter and DC Transformer ArchitecturesPredictive Gate Drive, TrueDrive, and PowerPAD are a trademarks of Texas Instruments Incorporated.On-Chip Predictive Gate Drive™ for High-Efficiency Synchronous Buck OperationDual ±3-A TrueDrive™ Outputs1-MHz High Frequency Operation with 70-ns Delay from SYNCIN to G1 OutputLeading Edge ModulationOvercurrent Protection using a Parallel Average Current Mode Control Loop3 Modes to Support 2.7-V to 35-V Bias OperationReverse Current Protection for Output StageUser Programmable Shutdown±1.0% Initial Tolerance Bandgap ReferenceHigh Bandwidth Error AmplifiersThermally Enhanced HTSSOP 20-Pin PowerPAD™ PackageAPPLICATIONSSecondary-Side Post Regulation (SSPR) for Multiple Output Power SuppliesCascaded Buck ConvertersPost Processing Converters for Bus Converter and DC Transformer ArchitecturesPredictive Gate Drive, TrueDrive, and PowerPAD are a trademarks of Texas Instruments Incorporated.
Description
AI
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-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 synchronization signal from either the primary side or the high duty cycle quasi-dc output of bus converters or dc transformers. For higher efficiency, it also incorporates the Predictive Gate Drive™ technology that virtually eliminates body diode conduction losses in synchronous rectifiers.
The UCC2540 is available in the extended temperature range of –40°C to 105°C and is offered in thermally enhanced PowerPAD™ 20-pin HTSSOP (PWP) package. This space saving package with standard 20-pin TSSOP footprint has a drastically lower thermal resistance of 1.4°C/W øJCto accommodate the dual high-current drivers on board.
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-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 synchronization signal from either the primary side or the high duty cycle quasi-dc output of bus converters or dc transformers. For higher efficiency, it also incorporates the Predictive Gate Drive™ technology that virtually eliminates body diode conduction losses in synchronous rectifiers.
The UCC2540 is available in the extended temperature range of –40°C to 105°C and is offered in thermally enhanced PowerPAD™ 20-pin HTSSOP (PWP) package. This space saving package with standard 20-pin TSSOP footprint has a drastically lower thermal resistance of 1.4°C/W øJCto accommodate the dual high-current drivers on board.