ADI AD7284八路锂电池检测系统方案
ADI公司的AD7284是八路锂电池检测系统,包含了混合动力汽车和备份锂电池所有的通用监测功能,电池电压精度(TUE)±3 mV,ADC分辨率14位,VDD工作电压10V-40V,片内集成了5V稳压器,主要用在锂电池检测,电动和混合动力汽车以及固定的电源应用.本文介绍了AD7284主要特性,功能框图,应用电路以及包括EV-AD7284TMSDZ(主板)和EV-AD7284SSSDZ(从板)在内的评估板AD7284主要特性和框图以及两个器件菊花链接图.
The AD7284 contains all the functions required for the general-purpose monitoring of stacked Li-Ion batteries, as used in hybrid electric vehicles and battery backup applications.
The AD7284 has multiplexed cell voltage and auxiliary, analog-to-digital converter (ADC) measurement channels supporting four to eight cells of battery management. The device provides a maximum total unadjusted error, TUE, (cell voltage accuracy) of ±3 mV that includes all the internal errors from input to output. The primary ADC resolution is 14 bits.
The AD7284 also includes an integrated secondary measurement path that validates the data on the primary ADC. Other diagnostic features include the detection of open inputs, communication, and power supply related faults.
The AD7284 cell balancing interface outputs control the external field effect transistors (FETs) to allow discharging of individual cells.
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