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HEV/EV OBC & DC/DC converter

Integrated high voltage (OBC & DC/DC)

Products and reference designs
Block diagram

Integrated high voltage (OBC & DC/DC)

Block diagram

Overview

Our integrated circuits help you create integrated high voltage combination of onboard charger (OBC) and DC/DC converter designs that enable 2-in-1 integration for higher power density and lower BOM.

Design requirements

Integrated high voltage (OBC and DC/DC) systems require:

  • High performance and fast digital control loops enabling highly efficient power conversion and increased power density.
  • Simplified and efficient integration of bidirectional OBC to support V2X and DC/DC converter for pre-charge function.
  • Control integration using single microcontroller for both OBC and DC/DC.

Block diagram

Find products and reference designs for your system.

Integrated high voltage (OBC & DC/DC)

AC power from grid AC power from grid OBC DC/DC primary power stage OBC DC/DC primarypower stage OBC DC/DC secondary power stage OBC DC/DC secondarypower stage Sensors Sensors Temperature Sensor Temperature Sensor Gate driver Gate driver Isolated gate driver Isolated gate driver Controller Controller MCU MCU PFC power stage PFC power stage Shunt / magnetic Shunt / magnetic Bias supply Bias supply PMIC PMIC AC/DC EMI filter AC/DC EMI filter EMI filter EMI filter OBC to DC/DC communication OBC to DC/DC communication Digital isolator Digital isolator Shunt / magnetic Shunt / magnetic 12V battery 12V battery Shunt / magnetic Shunt / magnetic Shunt / magnetic Shunt / magnetic Circuit breaker Circuit breaker HSSC HSSC HVLV DC/DC primary power stage HVLV DC/DC primarypower stage HVLV DC/DC secondary power stage HVLV DC/DC secondarypower stage Controlled DC to HV battery Controlled DC to HV battery HV battery HV battery DC power from HV battery DC power from HV battery Controlled DC to LV battery Controlled DC to LV battery PWM PWM PWM PWM Isense Isense Isense Isense Isense Isense Isense Isense Vsense Vsense Vsense Vsense Vsense Vsense Vsense Vsense Vsense Vsense Isense Isense Tsense Tsense Non-isolated gate driver Non-isolated gate driver Current amplifier/ Hall sensor Current amplifier/ Hall sensor Voltage amplifier Voltage amplifier Non-isolated DC/DC supply Non-isolated DC/DC supply Isolated DC/DC supply Isolated DC/DC supply Protections Protections Comparator Comparator Voltage reference Voltage reference High-side switch driver High-side switch driver Voltage supervisor & watchdog Voltage supervisor & watchdog EVSE communication EVSE communication Wireless Wireless PLC PLC CAN CAN HV battery HV battery HV Supervisor HV Supervisor Supply voltage monitoring Supply voltage monitoring HV supervisor HV supervisor Supply voltage monitoring Supply voltage monitoring LV supervisor LV supervisor

Controller

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The digital processing performs the signals processing and overall control algorithm. It governs the operations of the DC/DC converter and communicates with the vehicle usually via CAN and the cell supervision units. The digital processing may be based on a single or multiple safety microcontrollers.

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Microcontrollers (MCUs) & processors (6)
C2000 real-time microcontrollers
  • TMS320F28P659DK-Q1—C2000™ 32-bit MCU, 2x C28x+CLA CPU, Lock Step, 1.28-MB flash, 16-b ADC, HRPWM, CAN-FD, AES
    Data sheet: PDF | HTML
  • TMS320F280036-Q1—Automotive C2000™ 32-bit MCU 120-MHz 256-KB flash, FPU, TMU with CLA, AES and CAN-FD
    Data sheet: PDF | HTML
  • TMS320F28P559SJ-Q1—Automotive C2000™ 32-bit MCU, 1x C28x + 1x CLA, 150-MHz, 1.1-MB flash, 5x ADCs, CLB, AES and NNPU
    Data sheet: PDF | HTML
  • TMS320F280039C-Q1—Automotive C2000™ 32-bit MCU 120-MHz 384-KB flash, FPU, TMU with CLA, CLB, AES and CAN-FD
    Data sheet: PDF | HTML
  • TMS320F2800157-Q1—Automotive C2000™ 32-bit MCU 120-MHz 256-KB flash with HRPWM, CAN-FD, lockstep ASIL B, grade 0 and 1
    Data sheet: PDF | HTML
  • TMS320F280049C-Q1—Automotive C2000™ 32-bit MCU w/ 100 MHz, FPU, TMU, 256 KB flash, CLA, InstaSPIN-FOC, CLB, PGAs, SDFM
    Data sheet: PDF | HTML
  • TIDM-02000—Peak current-mode controlled phase-shifted full-bridge reference design using C2000™ real-time MCU
    Design guide: PDF | HTML Schematic: PDF
  • TIDM-02009—ASIL D safety concept-assessed high-speed traction, bi-directional DC/DC conversion reference design
    Design guide: PDF | HTML Schematic: PDF
  • TIDM-BIDIR-400-12—Bidirectional 400-V/12-V DC/DC Converter Reference Design
    Design guide: PDF Schematic: PDF
  • TIDM-PSFB-DCDC—Phase-Shifted Full Bridge DC/DC Power Converter Reference Design
    Design guide: PDF Schematic: PDF

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