TIDUF64A December   2023  – August 2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
    2. 1.2 PV Input with Boost Converter
    3. 1.3 Bidirectional DC/DC Converter
    4. 1.4 DC/AC Converter
  8. 2System Design Theory
    1. 2.1 Boost Converter
      1. 2.1.1 Inductor Design
      2. 2.1.2 Rectifier Diode Selection
      3. 2.1.3 MPPT Operation
    2. 2.2 Bidirectional DC/DC Converter
      1. 2.2.1 Inductor Design
      2. 2.2.2 Low-Voltage Side Capacitor
      3. 2.2.3 High-Voltage Side Capacitor
    3. 2.3 DC/AC Converter
      1. 2.3.1 Boost Inductor Design
      2. 2.3.2 DC-Link Capacitor
  9. 3System Overview
    1. 3.1 Block Diagram
    2. 3.2 Design Considerations
      1. 3.2.1 Boost Converter
        1. 3.2.1.1 High-Frequency FETs
        2. 3.2.1.2 Input Voltage and Current Sense
      2. 3.2.2 Bidirectional DC/DC Converter
        1. 3.2.2.1 High-Frequency FETs
        2. 3.2.2.2 Current and Voltage Measurement
        3. 3.2.2.3 Input Relay
      3. 3.2.3 DC/AC Converter
        1. 3.2.3.1 High-Frequency FETs
        2. 3.2.3.2 Current Measurements
        3. 3.2.3.3 Voltage Measurements
        4. 3.2.3.4 Auxiliary Power Supply
        5. 3.2.3.5 Passive Components Selection
    3. 3.3 Highlighted Products
      1. 3.3.1  TMDSCNCD280039C - TMS320F280039C Evaluation Module C2000™ MCU controlCARD™
      2. 3.3.2  LMG3522R030 650-V 30-mΩ GaN FET With Integrated Driver, Protection and Temperature Reporting
      3. 3.3.3  TMCS1123 - Precision Hall-Effect Current Sensor
      4. 3.3.4  AMC1302 - Precision, ±50-mV Input, Reinforced Isolated Amplifier
      5. 3.3.5  ISO7741 Robust EMC, Quad-channel, 3 Forward, 1 Reverse, Reinforced Digital Isolator
      6. 3.3.6  ISO7762 Robust EMC, Six-Channel, 4 Forward, 2 Reverse, Reinforced Digital Isolator
      7. 3.3.7  UCC14131-Q1 Automotive, 1.5-W, 12-V to 15-V VIN, 12-V to 15-V VOUT, High-Density > 5-kVRMS Isolated DC/DC Module
      8. 3.3.8  ISOW1044 Low-Emissions, 5-kVRMS Isolated CAN FD Transceiver With Integrated DC/DC Power
      9. 3.3.9  ISOW1412 Low-Emissions, 500kbps, Reinforced Isolated RS-485, RS-422 Transceiver With Integrated Power
      10. 3.3.10 OPA4388 Quad, 10-MHz, CMOS, Zero-Drift, Zero-Crossover, True RRIO Precision Operational Amplifier
      11. 3.3.11 OPA2388 Dual, 10-MHz, CMOS, Zero-Drift, Zero-Crossover, True RRIO Precision Operational Amplifier
      12. 3.3.12 INA181 26-V Bidirectional 350-kHz Current-Sense Amplifier
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
    2. 4.2 Note
    3. 4.3 Test Setup
      1. 4.3.1 Boost Stage
      2. 4.3.2 Bidirectional DC/DC Stage - Buck-Mode
      3. 4.3.3 DC/AC Stage
    4. 4.4 Test Results
      1. 4.4.1 Boost Converter
      2. 4.4.2 Bidirectional DC/DC Converter
        1. 4.4.2.1 Buck Mode
        2. 4.4.2.2 Boost Mode
      3. 4.4.3 DC/AC Converter
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
    2. 5.2 Tools and Software
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Authors
  13. 7Revision History

4.4.2.1 Buck Mode

Figure 4-8 and Table 4-2 show the efficiency of the bidirectional DC/DC converter functioning in buck mode at 400V DC-link output. The input battery voltages considered are 80V, 160V, 240V, and 320V and the table shows that the converter achieves peak efficiencies of 97.9%, 99.0%, 99.2%, and 99.4% respectively.

TIDA-010938 Bidirectional DC/DC Efficiency in Buck Mode Figure 4-8 Bidirectional DC/DC Efficiency in Buck Mode
Table 4-2 Bidirectional DC/DC Efficiency in Buck Mode
OUTPUT POWER EFFICIENCY AT VBat=80V OUTPUT POWER EFFICIENCY AT VBat=160V OUTPUT POWER EFFICIENCY AT VBat=240V OUTPUT POWER EFFICIENCY AT VBat=320V
0.2kW 97.9% 0.4kW 98.5% 0.4kW 98.5% 1.0kW 99.4%
0.3kW 97.9% 0.7kW 98.8% 0.8kW 99.1% 1.8kW 99.3%
0.5kW 97.4% 1.1kW 98.9% 1.3kW 99.1% 2.4kW 99.3%
0.7kW 97.6% 1.4kW 99.0% 1.8kW 99.2% 3.1kW 99.4%
0.9kW 97.7% 1.7kW 98.9% 2.3kW 99.2% 3.7kW 99.4%
1.0kW 97.9% 2.0kW 98.8% 2.8kW 99.2% 4.3kW 99.4%
1.2kW 97.9% 2.3kW 98.8% 3.2kW 99.2% 5.1kW 99.4%
1.4kW 97.9% 2.7kW 98.8% 3.8kW 99.2% 5.7kW 99.4%
1.5kW 97.9% 3.0kW 98.8% 4.3kW 99.2% 6.4kW 99.3%
1.7kW 97.8% 3.4kW 98.8% 4.8kW 99.1% 7.0kW 99.3%
1.9kW 97.7% 3.7kW 98.7% 5.3kW 99.1% 7.3kW 99.3%
2.0kW 97.6% 4.0kW 98.7% 5.7kW 99.0%
2.2kW 97.6% 4.4kW 98.6% 6.3kW 99.0%
2.4kW 97.4% 4.7kW 98.5% 6.8kW 98.9%