AN3222 Datasheet, PDF (1/18 Pages) STMicroelectronics – Demonstration board user guidelines

AN3222
Application note
Demonstration board user guidelines
for low-side current sensing with the TS507 operational amplifier
Introduction
This application note describes the STEVAL-ISQ013V1, a demonstration board specifically
designed for low-side current sensing with the TS507 operational amplifier.
Power management mechanisms are found in most electronic systems. Current sensing is
useful for protecting your applications. The low-side current sensing method consists in
placing a sense resistor between the load and the circuit’s ground. The resulting voltage
drop is amplified using the TS507.
This document describes how to accurately measure the current in your applications. It
provides:
● the advantages of the low-side current sense method.
● the schematics and layout of the demonstration board.
● a description of the TS507's main features.
● a method for selecting the most appropriate components for your application.
● theoretical and practical results.
Figure 1. Demonstration board
October 2010
Doc ID 17551 Rev 1
1/18
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