BQ26150 Datasheet, PDF (1/16 Pages) Texas Instruments – BATTERY PACK SECURITY AND AUTHENTICATION IC FOR PORTABLE APPLICATIONS (bqSECURE)

bq26150
www.ti.com
SLUS641A – JANUARY 2005 – REVISED JULY 2005
BATTERY PACK SECURITY AND AUTHENTICATION IC
FOR PORTABLE APPLICATIONS (bqSECURE™)
FEATURES
• Provides Authentication of Battery Packs
Through a Programmable CRC With a 96-bit
Unique Device ID
• 16 Bytes of User-Programmable Nonvolatile
Memory
• 12.5 KV IEC ESD Protection on HDQ Input
• Internal Time-Base Eliminates External
Crystal Oscillator
• Low-Power Operating: <30 µA
• Single-Wire HDQ Interface
• Powered Directly From the Communication
Bus
• Pass-Through HDQ Version Supports Existing
Packs With Gas Gauges
• Small 5-Pin SC 70 package
APPLICATIONS
• Cellular Phones
• PDA and Smart Phones
• MP3 Players
• Digital Cameras
• Internet Appliances
• Handheld Devices
DESCRIPTION
The bq26150 provides a method to authenticate battery packs, ensuring that only packs manufactured by
authorized sub-contractors are used in the end application. The bq26150 uses a 96-bit unique device ID, device
unique 16-bit seed, and a 16-bit device specific CRC to provide security. The device ID, CRC seed, and CRC
polynomial coefficients are stored securely in each bq26150 device, allowing the host to authenticate each pack.
The bq26150 communicates to the system over a simple one-wire, bidirectional serial interface. The 5 kbits/s
HDQ bus interfaces reduces communications overhead in the external microcontroller. The bq26150 also uses
the HDQ bus to charge an external capacitor that provides power to the bq26150.
TYPICAL APPLICATION
Optional Battery Monitor/Gas Gauge
Pack +
HDQ
R3
5 kW
0.01 mF
5
4
bq26150
1 23
Protector
R2
100 kW
V_CC
V_SS
HDQ
GPIO
SRP
SRN
BAT
+
R1
0.02 W
Pack -
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
bqSECURE is a trademark of Texas Instruments.
PRODUCT PREVIEW information concerns products in the forma-
tive or design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the
right to change or discontinue these products without notice.
Copyright © 2005, Texas Instruments Incorporated