BQ78Z100DRZT Part Information

Details for BQ78Z100DRZT by Texas Instruments

Electronic & Electrical Components > Semiconductors - ICs > Battery Management

Part Description

The bq78z100 device provides a fully integrated pack-based solution with a flash programmable custom reduced instruction-set CPU (RISC), safety protection, and authentication for 1-series to 2-series cell Li-Ion and Li-Polymer battery packs. The bq78z100 gas gauge communicates via an I2Ccompatible interface or single-wire HDQ interface and combines an ultra-low-power, high-speed TI bqBMP processor, high-accuracy analog measurement capabilities, integrated flash memory, an array of peripheral and communication ports, an N-channel FET drive, and a SHA-1 Authentication transform responder into a complete, high-performance battery management solution. The bq78z100 device provides an array of battery and system safety functions, including overcurrent in discharge, short circuit in charge, and short circuit in discharge protection for the battery, as well as FET protection for the N-channel FETs, internal AFE watchdog, and cell balancing. Through firmware, the devices can provide a larger array of features including protection against overvoltage, undervoltage, overtemperature, and more.

Part Downloads

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Part Features

  • Analog Front End with Two Independent ADCs u2013 Support for Simultaneous Current and Voltage Sampling
  • Bus Communications Interface Options u2013 I2 C u2013 HDQ
  • Compact 12-Terminal SON Package (DRZ)
  • High-Accuracy Coulomb Counter with Input Offset Error < 1 u00b5V (Typical)
  • High-Side FET Drive Allows Serial Bus Communication During Fault Conditions
  • Programmable Protection Levels for: u2013 Overcurrent in Discharge u2013 Short-Circuit Current in Charge u2013 Short-Circuit Current in Discharge u2013 Overvoltage u2013 Undervoltage u2013 Overtemperature
  • SHA-1 Hash Message Authentication Code (HMAC) Responder for Increased Battery Pack Security u2013 Split Key (2 u00d7 64) Stored in Secure Memory
  • Supports a 1-mu03a9 to 3-mu03a9 Current Sense Resistor

Part Specifications

Battery Management Function Authentication Fuel Gauge Protector
Battery Type LiFePO4 Li-Ion Li-Pol
Supply Voltage Min 2.2V
Supply Voltage Max 26V
Battery IC Case Style VSON
No. of Pins 12Pins
IC Interface Type I2C
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
RoHS Phthalates Compliant Yes
MSL MSL 2 - 1 year
SVHC No SVHC (27-Jun-2018)
RoHS Compliant

Alternative Part Descriptions

  • Impedance Track™ battery fuel (gas) gauge for 1-series to 2-series | Texas Instruments

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