Battery Sensor with LIN for 12 V Lead-Acid Batteries

MM912_637

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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

Product Details

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Block Diagram

MM912 Block Diagram

MM912 Block Diagram
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Features

CPU Core

  • S12 microcontroller with 128 kByte (J) or 96 kByte (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
  • Load supply voltage 3.5 V (Min), 28 V (Max)

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Documentation

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Hardware

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4 hardware offerings

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    USB Multilink Universal

    USB Multilink Universal is an all-in-one BDM/JTAG debug probe Kinetis, LPC, i.MX RT, S32, HCS08, HC(S)12(X), S12Z, RS08, ColdFire V1/+V1, ColdFire V2-4, MPC5xxx, DSC. Sup...
    USB Multilink Universal By P & E Microcomputer Systems, Inc Gold Partner
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    CYCLONE FX By P & E Microcomputer Systems, Inc Gold Partner

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