BQ28550-R1 Datasheet, PDF (1/42 Pages) Texas Instruments – Single Cell Li-Ion Battery Gas Gauge

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bq28550-R1
SLUSAS4A – OCTOBER 2012 – REVISED SEPTEMBER 2014
bq28550-R1 Single Cell Li-Ion Battery Gas Gauge and Protection
Not Recommended for New Designs
Check for Samples: bq28550-R1
1 Features
• A Comprehensive Single-Cell Li-Ion Battery Gas
Gauge and Protection Integrates All Essential
Functions:
– Low-Side N-CH FET Protection Control
– JEITA/Enhanced Charging
– Authentication
• Records Battery Gas Gauge Information
• Protection Functions Help to Prevent:
– Short-Circuit
– Overcurrent Charge and Discharge
– Overvoltage Charge (Overcharge)
– Undervoltage (Over-Discharge)
• Firmware Control of Discharge FET
• SHA-1/HMAC Battery Authentication
• General Purpose I/O Configurable for One of the
Following:
– CFET Control
– ALERT Output
• I²C Communications Interface with SBS
Command Set Operation
• 12-pin, 2.50-mm x 4.00-mm SON Package
2 Applications
1
3 Description
The Texas Instruments bq28550-R1 battery gas
gauge provides current and voltage protection, and
secure, SHA-1/HMAC authentication for single-cell
Lithium-Ion battery packs. Designed for battery-pack
integration, the bq28550-R1 requires host
microcontroller firmware support for implementation.
A system processor communicates with the bq28550-
R1 using a serial interface to obtain remaining battery
capacity, system run-time predictions, and other
critical battery information.
The bq28550-R1 gas gauge uses an accurate gas
gauging algorithm to report the status of the cell. The
gauge provides information such as state-of-charge
(%), run-time-to-empty (min.), charge-time to full
(min.), battery voltage (V), and pack
temperature (°C).
The bq28550-R1 gas gauge also features integrated
support for secure battery-pack authentication, using
the SHA-1/HMAC authentication algorithm.
Device Information⁽¹⁾
DEVICE NAME
PACKAGE
BODY SIZE
bq28550-R1
VSON (12)
4.00 mm × 2.50 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
• Tablet PCs
• Slates
• Digital Still and Video Cameras
• Handheld Terminals
• MP3 or Multimedia Players
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.