BQ26100 Datasheet PDF - TI

The bq26100 device provides a method to authenticate battery packs, ensuring that only packs manufactured by authorized sub-contractors are used in the end application. The security is achieved using the SHA-1 hash function inside the widely adopted keyed-hash message authentication code (HMAC) construction. A unique 128-bit key is stored in each bq26100 device, allowing the host to authenticate each pack.

●The bq26100 device communicates to the system over a simple one-wire bi-directional serial interface. The 5-kbits/s SDQ bus interface reduces communications overhead in the external microcontroller. The bq26100 device also derives power over the SDQ bus line via an external capacitor.

● Provides Authentication of Battery Packs Through

●SHA-1 Engine Based HMAC

● 160-Bytes One Time Programmable (OTP), 16-

●Bytes EEPROM

● Internal Time-Base Eliminates External Crystal

●Oscillator

● Low-Power Operating Modes:

● Active: < 50 µA

● Sleep: 8 µA Typical

● Single-Wire SDQ Interface

● Powers Directly From the Communication Bus

● 6-Lead VSON Package