TIDM-RESLLC-DCDC

Resonant LLC Half-Bridge DC/DC Converter

TIDM-RESLLC-DCDC

Design files

Overview

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%.

Features
  • 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.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU256.PDF (1373 K)

Reference design overview and verified performance test data

TIDU257.PDF (1514 K)

Reference design overview and verified performance test data

TIDC318.ZIP (442 K)

Detailed schematic diagram for design layout and components

TIDR457.PDF (93 K)

Detailed schematic diagram for design layout and components

TIDR458.ZIP (106 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDR459.PDF (2226 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

C2000 real-time microcontrollers

TMS320F28027C2000™ 32-bit MCU with 60 MHz, 64 KB flash

Data sheet document-pdfAcrobat PDF
C2000 real-time microcontrollers

TMS320F28027-Q1Automotive C2000™ 32-bit MCU with 60 MHz, 64 KB flash

Data sheet document-pdfAcrobat PDF
Linear & low-dropout (LDO) regulators

TPS795500-mA, low-dropout voltage regulator with enable

Data sheet document-pdfAcrobat PDF open-in-new HTML

Start development

Hardware

Development kit

TMDSHVRESLLCKIT — HV Resonant LLC Developer’s Kit

CAUTION: This equipment operates at high voltages and currents which can result in hazardous electrical shock. Please make sure you understand and follow all necessary safety precautions prior to purchasing and operating.

TMDSHVRESLLCKIT is a DIMM100 controlCARD based motherboard evaluation module (...)

Out of stock on TI.com

Technical documentation

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View all 5
Type Title Date
Technical article Do more in digital power, from line to load, with three new TI Designs May 20, 2014
Design guide Resonant LLC Half-Bridge DC/DC Converter Hardware Design Guide Mar. 14, 2014
More literature Resonant LLC Half-Bridge DC/DC Converter Quick Start Guide Mar. 14, 2014
Design guide Resonant LLC Half-Bridge DC/DC Converter Software Design Guide Mar. 14, 2014
More literature Designing an LLC Resonant Half-Bridge Power Converter Jul. 26, 2011

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