使用 DS2746 来识别基于识别电阻的电池组

摘要： DS2746 有两个辅助输入允许电压取样的电阻分压电路 ；这些投入是测量热敏电阻器或电池包鉴定电阻器的理想选择。本应用指南描述了如何计算未知电阻器的电阻 (中欧姆），以便正确识别基于识别电阻的电池组。

Maxim > App Notes > BATTERY MANAGEMENT

Keywords: DS2746, battery, identification, ID, auxiliary input, resistor Sep 11, 2006

APPLICATION NOTE 3889
Using the DS2746 to Identify a Battery-Pack Based on an
Identification Resistor

Abstract: The DS2746 has two auxiliary inputs to allow voltage sampling of resistor divider circuits; these
inputs are ideal for measuring thermistor or battery-pack identification resistors. This application note
describes how to calculate the resistance (in ohms) of the unknown resistor in order to properly identify a
battery pack based on an identification resistor.


Calculating Unknown Resistance

The VOUT pin drives a resistive divider formed by a known resistor and an unknown resistance that is to be
measured. The device repor