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

1 Current Sensing

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