UCC2540
Hocheffizienter sekundärer synchroner Abwärts-PWM-Controller
UCC2540
- On-Chip Predictive Gate Drive™ for High-Efficiency Synchronous Buck Operation
- Dual ±3-A TrueDrive™ Outputs
- 1-MHz High Frequency Operation with 70-ns Delay from SYNCIN to G1 Output
- Leading Edge Modulation
- Overcurrent Protection using a Parallel Average Current Mode Control Loop
- 3 Modes to Support 2.7-V to 35-V Bias Operation
- Reverse Current Protection for Output Stage
- User Programmable Shutdown
- ±1.0% Initial Tolerance Bandgap Reference
- High Bandwidth Error Amplifiers
- Thermally Enhanced HTSSOP 20-Pin PowerPAD™ Package
- APPLICATIONS
- Secondary-Side Post Regulation (SSPR) for Multiple Output Power Supplies
- Cascaded Buck Converters
- Post Processing Converters for Bus Converter and DC Transformer Architectures
Predictive Gate Drive, TrueDrive, and PowerPAD are a trademarks of Texas Instruments Incorporated.
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 øJC to accommodate the dual high-current drivers on board.
Technische Dokumentation
| Typ | Titel | Datum | ||
|---|---|---|---|---|
| * | Data sheet | High-Efficiency Secondary Side Synchronous PWM Controller datasheet (Rev. C) | 10 Okt 2008 |
Bestellen & Qualität
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