SBOA595A May   2024  – October 2024 AMC1202 , INA169 , TMCS1108

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Current Sensing
  5. 2Key Challenges of Current Sensing for Negative Power Supply
  6. 3Proposed Current Sensing Designs for Negative Power Supply
    1. 3.1 Hall Current Sensor
    2. 3.2 Current Sensing Based Isolated Amplifier
    3. 3.3 Current Sensing Based Isolated ADC
    4. 3.4 Current Sensing Based Difference Amplifier
  7. 4Summary
  8. 5References
  9. 6Revision History

Abstract

In medical systems or industry systems, designer often need to monitor system current in case fault, monitor system power status or current for control system. There are many current sensing amplifier available in the market but most of them are designed for sensing current in a positive output power supply applications and cannot directly be used for negative output power supply designs. This application note introduces four methods to use TI designs to sense current for a negative output power supply.