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

3.4.4 Bidirectional Charge and Discharge Circuits

In addition to separate buck circuits for charging and boost circuits for discharging, Texas Instruments also offers chips with both charging and discharging functions in the same chip. These chips, such as the TPS61383-Q1, LM51772-Q1, and BQ25853-Q1 have the advantage of a single inductor rather than one for buck and one for boost, as well as features such as automatic switch-over from charging to discharging when needed.