|Package | PIN:||DRP | 6|
|Temp:||I (-40 to 85)|
- Provides Authentication of Battery Packs Through
SHA-1 Engine Based HMAC
- 160-Bytes One Time Programmable (OTP), 16-
- Internal Time-Base Eliminates External Crystal
- 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
Texas Instruments BQ26100DRPR
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.