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 System Overview

The TIDA-010939 reference design is part of the TI-EVSE development platform for AM62L and represents a universal charging controller for AC and DC charging stations with open-source software stack. The complete platform consists of three separate parts, the AM62L-EVM, TIDA-010939, and the TIDA-010239.

The AM62L-EVM, serving as the main CPU, running the EVerest Open Source Software charging stack on Linux® is handling the digital communication with the EV. In addition to that, the EVM supports Ethernet and Wireless Connectivity for communications with the backend or a charge point management system, respectively. If required, the EVM can be used to support a display for HMI as well.

The TIDA-010939 acts as the front-end controller based on the MSPM0 microcontroller. The design controls the analog handshakes with the EV as well as safety functions like locking the charging plug and monitoring the temperature of the high-voltage contacts inside. The MSP communicates through Universal Asynchronous Receiver Transmitter (UART), a serial communication protocol with the AM62L.

Add the TIDA-010239 to include an AC charger. This reference design completes the platform with an isolated AC to DC power supply with backup power in case of a grid outage. The TIDA-010239 contains the high-voltage contractor and a driver to connect the electric vehicle to the grid. Additionally, the TIDA-010239 detects if the relay is welded.

The primary function of the charging controller is to connect all the systems required for charging together, and handling the communication between these systems and the electric vehicle. The communication with an EV is always done with an analog handshake. The exact requirements vary between the different charging standards. The TIDA-010939 offers circuitry to support the following standards Combined Charging System 1 and 2 (CCS1 CCS2), North American Charging Standard (NACS), Guobiao/Tuijian (GB/T), and Charge de Move (CHAdeMO).

In addition to the analog handshake, a second, high-level communication is required for DC-charging. In this case, not the onboard charger (OBC) of the EV, but the EVSE serves as the charger and needs to detect which voltage level and current limit is required to safely charge the EV battery. The standard ISO15118, which is used for CCS1, CCS2, and NACS, specifies Powerline Communication through a HomePlug Green PHY (HPGP) as physical layer, while GB/T and CHAdeMO use the CAN for this kind of communication. Therefore, the TIDA-010939 includes an HPGP and a dedicated CAN transceiver. Both elements are connected to the AM62L, as the processor handles the digital communication.

Additional safety functions which are required by the charging standards are either included on the TIDA-010939, or can be added by external TIDA reference designs. The onboard safety functions include temperature monitoring of the contacts in the charging cable and circuitry to control a motorized locking mechanism, designed to prevent removal of the cable during the charging cycle. The TIDA-010939 also includes connections for an external residual current detection (RCD) device, given by the TIDA-010237. To be able to connect further devices for testing, like a safety switch, or to control status LEDs, the TIDA-010939 supports two digital inputs (24V tolerant), one analog input (0V–12V) and three digital outputs (low-side switch).

To enable communication with peripherals like energy meters and power modules, the TIDA-010939 supports transceivers for RS-485, RS-232, and CAN.