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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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UCC2540 датащи(PDF) 1 Page - Texas Instruments |
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UCC2540 датащи(HTML) 1 Page - Texas Instruments |
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1 / 37 page  UCC2540 SLUS539A − JUNE 2004 − REVISED AUGUST 2004 HIGHEFFICIENCY SECONDARY SIDE SYNCHRONOUS BUCK PWM CONTROLLER 1 www.ti.com 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 PowerPAD t Package SIMPLIFIED APPLICATION DIAGRAM APPLICATIONS D Secondary-Side Post Regulation (SSPR) for Multiple Output Power Supplies D Cascaded Buck Converters D Post Processing Converters for Bus Converter and DC Transformer Architectures DESCRIPTION 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 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 t technology that virtually eliminates body diode conduction losses in synchronous rectifiers. UDG−04057 V FB C1 OUT Input QP Main Output FB UCC25701 13 14 12 16 7 2 VEA− REF VDRV G2 G2S VDD UCC2540 19 18 20 17 9 3 8 COMP G2C CEA− BST G1 SWS SW 15 11 1 5 RSET RAMP PGND SS 4 SYNCIN R1 R2 RSNS AUX Output 10 TR Main Output PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright 2004, Texas Instruments Incorporated Predictive Gate Drive , TrueDrive, and PowerPAD, are a trademarks of Texas Instruments Incorporated. |
Аналогичный номер детали - UCC2540 |
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Аналогичное описание - UCC2540 |
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