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Resonant LLC Half-Bridge DC/DC Converter (TIDM-RESLLC-DCDC)
This design is a digitally controlled 300W resonant LLC half-bridge DC/DC converter with added synchronous rectification. The resonant LLC power topology is valued for its inherently high levels of efficiency credited to high frequency, low loss resonant switching. However, implementation of such a power converter can be challenging since the control theory is based in frequency modulation of the converter rather than the more typically seen duty cycle modulation. This design guides users step-by-step through the complexities of a resonant LLC half-bridge converter, melding software and hardware design approaches to implement a complete high performance converter. The C2000™ Piccolo™ microcontroller is the digital controller for this design, enabling the resonant converter to operate at greater than 90% efficiency across wide load ranges, and with peak efficiency greater than 93%.
Full microcontroller-based control of resonant LLC half-bridge DC/DC converter 375-405V DC input, 12 DC output, 25A rated output (300W) >90% efficiency across wide load range with >93% peak efficiency Synchronous rectification support for increased power efficiency Zero voltage switching (ZVS) across entire load range for greater efficiency and reliability Convenient GUI for initial design evaluation, and detailed step-by-step documentation for further depth of evaluation NOTE: Software for this board can be found inside the controlSUITE™ software package. Download controlSUITE at ti.com/controlsuite. Once installed, navigate to "High Voltage LLC Resonant Developer's Kit" under the Development Tools -> Digital Power section.
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