SDAA263 June   2026 TPS55289 , TPS55289-Q1 , TPS552892-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1E-latch System Introduction
    1. 1.1 Supercapacitor Characteristic
    2. 1.2 Typical Block Diagram of E-latch System
  5. 2 Supercapacitor Charging with Buck-boost Converter Based on CC/CV Control
    1. 2.1 Advantages of CC/CV Regulators for Supercapacitor Charging
    2. 2.2 Buck-Boost Dual-Loop With CC/CV
    3. 2.3 Output Current Monitoring
  6. 3Design Process
    1. 3.1 TPS5528x Family Part Selection
      1. 3.1.1 Current Capability
      2. 3.1.2 I2C Version and Non-I2C Version
      3. 3.1.3 Part Selection
    2. 3.2 Charge Voltage and Charge Current Setting
  7. 4Experimental Results
  8. 5Summary
  9. 6References

5 Summary

The E-latch with 5S supercapacitor design provides a robust, reliable emergency backup power system for automotive door mechanisms. The integration of advanced buck-boost converter technology with CC/CV control enables efficient supercapacitor charging while maintaining system simplicity and cost-effectiveness.

Key advantages of this design include:

  • Compliance with automotive safety standards
  • Fast emergency response capability
  • Long service life and minimal maintenance
  • Scalable architecture for various vehicle configurations