ADI AD8450电池测试和监控的模拟前端和控制器解决方案
ADI公司的AD8450是用于电池测试和监控的精密模拟前端和控制器.集成的精密可编程增益仪表放大器(PGIA)测量电池充电/放电电流,而可编程增益差动放大器(PGDA)测量电池电压,内部激光调整电阻网络设置PGIA和PGDA的增益:PGIA增益为26×, 66×,133×和200×;PGDA增益为0.2×,0.27×,0.4×和0.8×.主要用在电池测试和形成以及电池模块测试.本文介绍了AD8450功能框图和详细框图,以及评估板AD8450-EVALZ/ADP1972-EVALZ主要特性,框图,评估板的电源板和模拟控制板电路图,材料清单和PCB设计图.
The AD8450 is a precision analog front end and controller fortesting and monitoring battery cells. A precision programmablegain instrumentation amplifier (PGIA) measures the batterycharge/discharge current, and a programmable gain differenceamplifier (PGDA) measures the battery voltage.
Internal laser trimmed resistor networks set the gains for thePGIA and the PGDA, optimizing the performance of theAD8450 over the rated temperature range. PGIA gains are 26,66, 133, and 200. PGDA gains are 0.2, 0.27, 0.4,and 0.8.
Voltages at the ISET and VSET inputs set the desired constantcurrent (CC) and constant voltage (CV) values. CC to CVswitching is automatic and transparent to the system.
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