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Freescale’s new battery sensor combines MCU and CAN with three-channel analog front end

Freescale Semiconductor (NYSE:FSL) has announced a new battery sensor that it says is the first to combine three measurement channels, a 16/32-bit MCU, and a CAN protocol module in a single package.

The MM9Z1J638 battery sensor measures key battery parameters for monitoring state of health (SOH), state of charge (SOC) and state of function (SOF) for early failure prediction. A flexible four-cell front-end architecture supports conventional 12 V lead-acid batteries as well as emerging battery applications such as 14 V stacked cell Li-on.

Freescale points out that new automotive technologies, such as start-stop functionality, regenerative braking and intelligent alternator control, are creating demand for more precise sensing of the battery’s state to provide early failure warnings.

“Our introduction of the industry’s first single-package, automotive-qualified intelligent battery sensor with MCU and CAN components will help automakers cope with increasing algorithm complexity and data communication demands as cars become more connected and intelligent,” said Freescale Senior VP James Bates. “Also featuring integrated functional safety support, the new MM9Z1J638 battery sensor helps to support vehicle reliability even as automotive electrical system complexities increase.”

Features of the MM9Z1J638 include:

  • 16/32 bit MCU, 128 K Flash, 8 K RAM, 4 K EEPROM
  • Integrated CAN protocol module
  • 3x 16-bit ADC for current, voltage and temperature
  • Support for up to four cells and up to 52 V inputs
  • Multiple low-power modes
  • Multiple wake-up triggers (current, temperature, etc.)
  • Configurable hardware filters
  • Robust LIN physical layer
  • 7 x 7 mm 48-pin QFN package


Source: Freescale Semiconductor


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