STDA040 August   2026 BQ76907-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2E-latch System Architecture
  6. 3Typical Design
    1. 3.1 Motor Drivers
    2. 3.2 Network Connection
    3. 3.3 Microcontroller
    4. 3.4 Backup Power
      1. 3.4.1 Discussion of Energy Requirements
        1. 3.4.1.1 Energy Needed By A Single Motor
        2. 3.4.1.2 Requirements for Multiple Motors
        3. 3.4.1.3 Usable energy stored
        4. 3.4.1.4 Derating the Capacitance
      2. 3.4.2 Charging Circuit
      3. 3.4.3 Discharging Circuit
      4. 3.4.4 Bidirectional Charge and Discharge Circuits
      5. 3.4.5 Cell Balancing Circuit
    5. 3.5 Position Sensors
  7. 4Future Trends and Innovations
  8. 5Conclusion
  9. 6References

3.2 Network Connection

The E-latch circuitry is connected to the vehicle network, typically through either a CAN or LIN connection. The E-latch circuitry receives commands regarding actions to perform and responds with status and diagnostic information. Often a single device, a system basis chip (SBC), includes the network transceiver, 12V-to-logic voltage regulator (either buck converter or linear LDO), and common functions such as a watchdog timer, voltage monitor, and so forth.

Texas Instruments has a broad portfolio of SBCs, see System Basis Chips on ti.com for more information.

BQ76907-Q1 Generic SBC Block Diagram Figure 3-5 Generic SBC Block Diagram