SDAA159 October   2025 XTR200

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Detailed Description
    1. 2.1 Current Measurement
    2. 2.2 Current Transmission
    3. 2.3 Additional Output Circuitry
    4. 2.4 Simulations
  6. 3Summary
  7. 4References

3 Summary

This document outlines the key considerations when designing current monitor circuitry that complies with the OCP M-CRPS specification. The example circuit shown here makes use of a high-precision current shunt amplifier as well as the XTR200 current transmitter to produce a scaled down representation of the output current on a 12V bus. The use of the XTR200 allows for the sensitivity of the circuit to be user-configurable to meet the required transfer functions in the M-CRPS standard. The circuit additionally includes output clamping to limit the output voltage to approximately 3.3V as well as presence detection functionality for backwards compatibility. Simulations of the circuit's performance show excellent precision, transient response, and clamping functionality. The high performance, small size, and integration make the XTR200 an excellent choice for current monitor outputs in power supplies for enterprise computing applications.