TI Amplifier Audio Power Transistors BQ26100DRPR NPN PNP

Features for the BQ26100

• Provides authentication of battery packs through SHA-1 engine based HMAC
• 160-byte 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

Description for the BQ26100

The bq26100 deviceprovides a method to authenticate battery packs, ensuring that only packs manufactured byauthorized sub-contractors are used in the end application. The security is achieved using theSHA-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 eachpack.

The bq26100 devicecommunicates to the system over a simple one-wire bi-directional serial interface. The 5-kbits/sSDQ bus interface reduces communications overhead in the external microcontroller. Thebq26100 device also derivespower over the SDQ bus line via an external capacitor.