Freescale MM912J637汽车智能电池传感器(IBS)解决方案

Freescale公司的MM912J637是基于S12 MCU技术的汽车智能电池传感器(IBS),支持精密的电流,电压和温度测量,集成的LIN 2.1和LIN2.0接口进行通信,主要用在汽车电池电流/电压/温度监测,电池充电状态监测和电池完好状态监测以及混合动力汽车.本文介绍了MM912J637主要特性,方框图,模拟部分框图以及电流/电压/温度测量通路框图,简化应用电路和所需要外接元件表.

Intelligent Integrated Precision Battery Sensor

The MM912I637 (96 kB) and MM912J637 (128 kB) are fully integrated LIN Battery monitoring devices, based on Freescale S12 MCU Technology.

The device supports precise current measurement via an external shunt resistor, and precise battery voltage measurement via a series resistor directly at the battery plus pole. The integrated temperature sensor combined in the close proximity to the battery, allows battery temperature measurement.

The integrated LIN 2.1 interface makes the sensor feedback available on the LIN Bus.

MM912J637主要特性:

• Battery voltage measurement

• Battery current measurement in up to 8 ranges

• On chip temperature measurement

• Normal and two low-power modes

• Current threshold detection and current averaging in standby => wake-up from low-power mode

• Triggered wake-up from LIN and periodic wake-up
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