BQ78Z100 Texas instruments

BQ78Z100

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BQ78Z100

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Описание

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 I2C-compatible 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.

High-Accuracy Coulomb Counter with Input Offset
Error < 1 µV (Typical)
High-Side FET Drive Allows Serial Bus
Communication During Fault Conditions
Analog Front End with Two Independent ADCs
- Support for Simultaneous Current and Voltage
  Sampling
Bus Communications Interface Options
- I²C
- HDQ
SHA-1 Hash Message Authentication Code
(HMAC) Responder for Increased Battery Pack
Security
- Split Key (2 × 64) Stored in Secure Memory
Programmable Protection Levels for:
- Overcurrent in Discharge
- Short-Circuit Current in Charge
- Short-Circuit Current in Discharge
- Overvoltage
- Undervoltage
- Overtemperature
Supports a 1-mΩ to 3-mΩ Current Sense Resistor
Compact 12-Terminal SON Package (DRZ)

Cell chemistry	Li-Ion/Li-Polymer
Number of series cells	1-2 Cells
Communication interface	HDQ, I2C
Battery capacity (min) (mAh)	100
Battery capacity (max) (mAh)	32000
Implementation	Pack
External capacity indication	None
Features	Cell balancing, Impedance Track™ algorithm, Integrated Protector, SHA-1 Authentication
Operating temperature range (°C)	-40 to 85
Cell balancing	External, Internal
Rating	Catalog