MM912_637: Battery Sensor with LIN for 12 V Lead-acid Batteries

Overview

The NXP^® MM912_637 battery sensors are integrated battery monitoring devices that allow simultaneous measurement of current and voltage for precise determination of SOC (State of Charge), SOH (State of Health), and other parameters.

The integrated temperature sensor combined with the close proximity to the battery allows battery temperature measurement
Multiple application-specific hardware blocks reduce MCU overhead and related power consumption
Configurable low-power modes with automated battery state observation and sophisticated wake-up capability further reduce current consumption
The integrated LIN 2.1 interface allows communication and control of battery monitoring functions

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Features

Product Longevity Program

This product is included in NXP’s product longevity program, with assured supply for a minimum of 10 years after launch

CPU Core

S12 microcontroller with 128kByte(J) or 96kByte(I) Flash
4 kByte Data Flash
6 kBytes of RAM
Background debug (BDM)

Standard I/O

8 x MCU General Purpose I/O including SPI functionality
4 x 5V GPIO including one Wake Up capable High Voltage Input (PTB3/L0)
16-Bit, 4 Channel - Timer Module (TIM16B4C)
8-Bit, 2 Channel - Pulse width modulation module (PWM)

Application Specific Functions

Battery Voltage Measurement
Battery Current Measurement in up to 8 ranges
Accurate internal oscillator (for extended accuracy an external quartz oscillator may be used)
Normal and 2 low-power modes
Communication via LIN 2.1, LIN2.0 bus interface
Triggered wake-up from LIN and periodic wake-up
Signal Low Pass Filtering (Current, Voltage)
PGA (programmable low-noise gain amplifier) with automatic gain control feature
Current threshold detection and current averaging in standby/wake-up from low-power mode
External Temperature Sensor Option (TSUP, VTEMP)
Optional 2nd external voltage sense input (VOPT)
On-chip temperature measurement
Industry standard EMC compliance