TIDUFE6A September   2025  – December 2025

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 Control Pilot
        1. 2.2.1.1 Signals
        2. 2.2.1.2 Duty Cycle
        3. 2.2.1.3 Signal State
        4. 2.2.1.4 Control Pilot Signal Circuit
        5. 2.2.1.5 EV Simulation Circuit
      2. 2.2.2 HomePlug Green PHY - Powerline Communication
        1. 2.2.2.1 HomePlug Green PHY Circuit
      3. 2.2.3 Proximity Pilot
        1. 2.2.3.1 Type 1 and NACS
        2. 2.2.3.2 Type 2
        3. 2.2.3.3 Proximity Detection Circuit
      4. 2.2.4 GB/T – ChaoJi
        1. 2.2.4.1 Signals
        2. 2.2.4.2 GB/T
        3. 2.2.4.3 ChaoJi
        4. 2.2.4.4 Schematics
        5. 2.2.4.5 EV Simulation
      5. 2.2.5 CHAdeMO
        1. 2.2.5.1 Signals
        2. 2.2.5.2 Standard
        3. 2.2.5.3 Schematics
          1. 2.2.5.3.1 High-Side Switch (CS1)
          2. 2.2.5.3.2 Low-Side Switch (CS2)
          3. 2.2.5.3.3 Proximity Detection
          4. 2.2.5.3.4 Vehicle Charge Permission
        4. 2.2.5.4 EV Simulation
      6. 2.2.6 Pluck Lock
        1. 2.2.6.1 Signals
        2. 2.2.6.2 Schematics
        3. 2.2.6.3 Motor Driver
        4. 2.2.6.4 Solenoid Driver
      7. 2.2.7 Temperature Sensing
        1. 2.2.7.1 Signals
        2. 2.2.7.2 Schematics
        3. 2.2.7.3 Calculation
      8. 2.2.8 Connectivity
        1. 2.2.8.1 RS-485
        2. 2.2.8.2 RS-232
        3. 2.2.8.3 CAN
      9. 2.2.9 General Purpose Input/Output
        1. 2.2.9.1 Digital Input
        2. 2.2.9.2 Analog Input
        3. 2.2.9.3 Digital Output
    3. 2.3 Highlighted Products
      1. 2.3.1 MSPM0G3507
      2. 2.3.2 AM62L
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Required Hardware and Software
    2. 3.2 Test Setup
      1. 3.2.1 Power Supply Options
      2. 3.2.2 XDS110 Debug Probe
        1. 3.2.2.1 Application (or Back Channel) UART
        2. 3.2.2.2 Using an External Debug Probe Instead of the Onboard XDS110
      3. 3.2.3 Connecting to the AM62L-EVM
      4. 3.2.4 Connector, Pin Header, and Jumper Settings
    3. 3.3 Test Results
      1. 3.3.1 Control Pilot
        1. 3.3.1.1 TLV1805 Output Rise and Fall Time
        2. 3.3.1.2 Control Pilot Signal Voltage Accuracy in Different States
      2. 3.3.2 GB/T ChaoJi
        1. 3.3.2.1 GB/T Signal Voltage Accuracy
        2. 3.3.2.2 ChaoJi Signal Voltage Accuracy in Different States
      3. 3.3.3 Digital and Analog Input
        1. 3.3.3.1 Digital In
        2. 3.3.3.2 Analog In
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
    2. 4.2 Tools and Software
    3. 4.3 Documentation Support
    4. 4.4 Support Resources
    5. 4.5 Trademarks
  11. 5About the Author
  12. 6Revision History

2.2.6.3 Motor Driver

The requirements for driving the locking actuator vary between manufacturers. This design supports motors rated for 12V. Even if the DRV8220 can supply up to 1.76A of output current, the device is protected by a 1.5A input fuse. To control the amount of output current, the duty cycle of the PWM signal can be adjusted.

To monitor the state of the locking actuator, the charging inlet or connector typically provides a feedback mechanism. Normally, this mechanism changes the total resistance depending on the state of the lock. By forming a voltage divider with this circuit, the state can be measured through an ADC of the MSPM0 microcontroller.

In this reference design, resistor R108 (1kΩ) is used to form the voltage divider with the feedback circuitry of the locking mechanism. An ESD protection Diode (D26) is placed at the signal input to protect the MSPM0 microcontroller. A voltage-drop caused by the feedback circuitry also enables the LED D27 to indicate if the charging pluck is locked.

TIDA-010939 CCS, GBT Pluck Lock Feedback CircuitFigure 2-19 CCS, GBT Pluck Lock Feedback Circuit

To create a voltage divider with the feedback circuitry of the locking mechanism, a 1kΩ resistor R108 is used on the reference design. The ESD protection diode D26 is placed at the input of the signal to protect the MSPM0 microcontroller. A voltage-drop caused by the feedback circuitry enables the LED D27.