ZMD ZSSC1856 Intelligent Battery Sensor IC

Zentrum Mikroelektronik Dresden (ZMD) introduced their ZSSC1856 Intelligent Battery Sensor IC. The ZSSC1856 chip is ideal for fuel saving start/stop systems and other solutions for measuring state of health (SOH), state of charge (SOC) or state of function (SOF) of a vehicle’s battery. The ZSSC1856 comes in a QFN32 5×5 package of only 0.85mm height. It is priced at 3.84 EUR (5.40 USD) for low volume. An evaluation kit, application notes and samples are available.

The ZSSC1856 Intelligent Battery Sensor has built-in self-test and diagnostic functions. It’s calibrated on-chip temperature sensor eliminates the need for calibration of external components. During sleep mode, the chip periodically monitors the discharge of the battery. Measurement cycles and different wakeup conditions like current, voltage or temperature thresholds are user controlled.

The new ZMD IC is designed for low power consumption. It uses less than 100A in sleep mode, and operates with 10 to 20mA in normal mode. The ZSSC1856 can be supplied with voltages from 4.2 to 18V and is directly connected to the vehicle’s battery. The ZSSC1856 is AECQ100 qualified and specified for temperatures from 40 to +125°C.

The battery sensor IC features an internal 18-bit Sigma/Delta ADC with on-chip voltage reference and two input channels. One channel is for measuring IBAT via the voltage drop at the external shunt resistor. The second channel is used to measure VBAT and the temperature. An ARM core, a highly reliable 96kB flash/EE memory with ECC and 8kB SRAM, is available to execute specific software for calculating the battery states. The device communication interface supports LIN 1.3, 2.0 and 2.1 specifications.

ZSSC1856 Intelligent Battery Sensor IC Highlights

  • Smallest footprint in the industry
  • Minimum power consumption without sacrificing performance
  • Unique ADC resolution enabling higher accuracy
  • Enables implementation of smallest possible sensor modules
  • Reduces BOM and saves board space
  • Evaluation kit, application notes and samples are available

More info: Zentrum Mikroelektronik Dresden AG (ZMDI)