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

2.2.4.4 Schematics

The CC1 line carries a 12V signal with a maximum current of 12mA limited by the 1kΩ resistor R73. For ChaoJi, two additional switches (S0 and S1) are required. To accomplish this action, the TS12A4515 device is used. The TS12A4515 is a single-pole, single-throw (SPST), low-voltage, single-supply CMOS analog switch, with very low switch on-state resistance. The device can handle rail-to-rail analog signals and can continuously supply ±20mA of current which exceeds the required maximum of 12mA in this application. The TS12A4515 is a normally closed (NC) type, so no control signal is needed if the circuit is to follow the GB/T 18487 standard. The digital inputs have 0.8V to 2.4V logic thresholds, providing compatibility with the MSPM0 microcontroller, when control is needed. If a normally open (NO) switch is preferred, the TS12A4514 can be used instead.

TIDA-010939 GB/T - ChaoJi Circuit Figure 2-11 GB/T - ChaoJi Circuit

To monitor Detection Point 1, the CC1 signal is connected to a non-inverting amplifier. Since ChaoJi uses high-value resistors (100kΩ) on the CC1 line, the sensing circuit must present a high-impedance input to avoid loading the signal and causing inaccurate voltage readings. This is implemented with the TLV9151 amplifier. The TLV9151 is part of the TLV915x family (TLV9151, TLV9152, and TLV9154) of 16V, general purpose operational amplifiers. These devices offer exceptional DC precision and AC performance, including rail-to-rail output, low offset (±125µV, typical), low offset drift (±0.3µV/°C, typical), and 4.5MHz bandwidth. With an input voltage range which exceeds the supply rails and rail-to-rail output, it makes an excellent choice to enable the correct measurement of the 12V CC1 signal, while using a 12V supply.

To scale the amplifier output to the ADCs valid input range (0V–3.3V), a voltage divider consisting of R78 and R79 is used. In case S0 is open and no EV is connected, R77 provides a high-impedance path to ground, preventing the CC1 signal from floating.