TIDM-1001

Two Phase Interleaved LLC Resonant Converter Reference Design Using C2000™ MCUs

TIDM-1001

Design files

Overview

Resonant converters are popular DC-DC converters frequently used in server, telecom, automotive, industrial and other power supply applications. Their high performance (efficiency, power density, etc.), improving requirements of the various industry standards, and the ever increasing power density goals have made these converters a good choice for medium to high power applications.

This design implements a digitally controlled 500W two phase interleaved LLC resonant converter. The system is controlled by a single C2000™ microcontroller (MCU), TMS320F280025C, which also generates PWM waveforms for all power electronic switching devices under all operating modes. This design implements a novel current sharing technique to accurately achieve current balancing between phases.

NOTE:  There is an older version of this design using F2837x device available in ControlSUITE.

Features
  • Digitally controlled two phase interleaved LLC resonant DC-to-DC converter
  • Excellent current sharing between phases without any additional hardware
  • Peak efficiency: 94.5%; efficiency > 90% for all loads above 10% of rated load
  • PowerSUITE support for easy adaptation of software for a customized power level
  • Fault protection: phase/output over-current, output over-voltage, and input under-voltage and overvoltage
  • Phase shedding with programmable limits

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

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

TIDUCT9A.PDF (14320 K)

Reference design overview and verified performance test data

TIDRQC9A.PDF (658 K)

Detailed schematic diagram for design layout and components

TIDRQD0.PDF (119 K)

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

TIDRQD1.PDF (782 K)

Detailed overview of design layout for component placement

TIDRQD3B.ZIP (2499 K)

Files used for 3D models or 2D drawings of IC components

TIDCDA4B.ZIP (400 K)

Design file that contains information on physical board layer of design PCB

TIDRQD2B.PDF (2165 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

TMS320F280021C2000™ 32-bit MCU with 100 MHz, FPU, TMU, 32-KB flash

Data sheet document-pdfAcrobat PDF open-in-new HTML
C2000 real-time microcontrollers

TMS320F280021-Q1Automotive C2000™ 32-bit MCU with 100 MHz, FPU, TMU, 32-KB flash

Data sheet document-pdfAcrobat PDF open-in-new HTML
C2000 real-time microcontrollers

TMS320F280023C2000™ 32-bit MCU with 100-MHz, FPU, TMU, 64-kb flash

Data sheet document-pdfAcrobat PDF open-in-new HTML
C2000 real-time microcontrollers

TMS320F280023-Q1Automotive C2000™ 32-bit MCU with 100 MHz, FPU, TMU, 64-KB flash

Data sheet document-pdfAcrobat PDF open-in-new HTML
C2000 real-time microcontrollers

TMS320F280023CC2000™ 32-bit MCU with 100 MHz, FPU, TMU, 64-KB flash, CLB

Data sheet document-pdfAcrobat PDF open-in-new HTML
C2000 real-time microcontrollers

TMS320F280025C2000™ 32-bit MCU with 100-MHz, FPU, TMU, 128-kb flash

Data sheet document-pdfAcrobat PDF open-in-new HTML
C2000 real-time microcontrollers

TMS320F280025-Q1Automotive C2000™ 32-bit MCU with 100 MHz, FPU, TMU, 128-KB flash

Data sheet document-pdfAcrobat PDF open-in-new HTML
C2000 real-time microcontrollers

TMS320F280025CC2000™ 32-bit MCU with 100-MHz, FPU, TMU, 128-kb flash, CLB

Data sheet document-pdfAcrobat PDF open-in-new HTML
C2000 real-time microcontrollers

TMS320F280025C-Q1Automotive C2000™ 32-bit MCU with 100 MHz, FPU, TMU, 128-KB flash, CLB

Data sheet document-pdfAcrobat PDF open-in-new HTML
Buck modules (integrated inductor)

PTH08080W2.25 A, 4.5-V to 18-V Input Wide Adjust Miniature Power Module

Data sheet document-pdfAcrobat PDF
High-speed op amps (GBW>=50MHz)

OPA3652.2V, 50MHz, Low-Noise, Single-Supply Rail-to-Rail Operational Amplifier

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS795500-mA, low-dropout voltage regulator with enable

Data sheet document-pdfAcrobat PDF open-in-new HTML
Low-side drivers

UCC27524A5-A/5-A dual-channel gate driver with 5-V UVLO, enable, and negative input voltage handling

Data sheet document-pdfAcrobat PDF open-in-new HTML
SR & load share controllers

UCD7138Low-side Power MOSFET Driver With Body Diode conduction Sensing

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

Technical documentation

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Type Title Date
* Design guide Two-Phase Interleaved LLC Resonant Converter Design With C2000™ Microcontrollers (Rev. A) Jan. 02, 2020
White paper Taking charge of electric vehicles – both in the vehicle and on the grid (Rev. A) Jun. 17, 2020
Technical article How to scale real-time control resources and sustain platform development in power conversion applications Mar. 20, 2020
White paper Cities grow smarter through innovative semiconductor technologies Jul. 07, 2017

Related design resources

Hardware development

EVALUATION BOARD
TMDSCNCD280025C TMS320F280025C controlCARD evaluation module

Software development

SOFTWARE DEVELOPMENT KIT (SDK)
C2000WARE-DIGITALPOWER-SDK DigitalPower software development kit (SDK) for C2000™ MCUs
IDE, CONFIGURATION, COMPILER OR DEBUGGER
POWERSUITE powerSUITE - Digital Power Supply Design Software Tools for C2000™ MCUs

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