SPRADE3 January   2024 ADS8329 , LM5180 , LMR38010 , OPA182 , TMS320F28384D , UCC27524

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Magnet of the MRI
    2. 1.2 Key Challenge to Design a Power Supply to Driver Superconductor
  5. 2Four-Phase Interleaving Phase-Shifted Full Bridge Power Supply Design
  6. 3Sub-System Description
    1. 3.1 Micro-Controller
    2. 3.2 Auxiliary Power Supply
    3. 3.3 Current Sensing
    4. 3.4 ADC Interface
    5. 3.5 MOSFET Driver
  7. 4Summary
  8. 5References

3.1 Micro-Controller

In this design, TI proposes TMS320F28384D as digital micro-controller due to the powerful functionality and low cost. The main benefits as follows.

  • Two TMS320C28x 32-bit CPU-core and one Arm Cortex-M4 processor can meet real-time control requirements
  • Abundant interface and connectivity to ease engineer design and potential communication application
  • Enough internal flash and RAM can meet most system requirements
  • 32 PWM (Pulse Width Modulator) channels to meet most of the MOSFET drive requirements
  • Four 16-bit,1.1 MSPS ADCs with 12 differential or 24 single-ended inputs. The ADC can also be configured to 12-bit/3.5 MSPS/24 channel. This ADC can be used to monitor current flowing through the full bridge
  • Other interfaces: 4-SPI, 4 UART, 2 IIC, Ethernet, USB2.0

TI also provides digital power supply libraries or demo code to support customers to quickly develop their system. Phase-Shifted Full Bridge DC/DC Power Converter Design Guide discusses the digital phase shifted full bridge DC-DC power-converter design with TI DSP.