BQ20Z655-R1_13 Datasheet, PDF (15/25 Pages) Texas Instruments – SBS 1.1-COMPLIANT GAS GAUGE AND PROTECTION ENABLED WITH IMPEDANCE TRACK™

bq20z655-R1
www.ti.com
SLUSAN9 – AUGUST 2011
Lifetime Data Logging Features
The bq20z655-R1 offers lifetime data logging, where important measurements are stored for warranty and
analysis purposes. The data monitored include:
• Lifetime maximum temperature
• Lifetime maximum temperature count
• Lifetime maximum temperature duration
• Lifetime minimum temperature
• Lifetime maximum battery cell voltage
• Lifetime maximum battery cell voltage count
• Lifetime maximum battery cell voltage duration
• Lifetime minimum battery cell voltage
• Lifetime maximum battery pack voltage
• Lifetime minimum battery pack voltage
• Lifetime maximum charge current
• Lifetime maximum discharge current
• Lifetime maximum charge power
• Lifetime maximum discharge power
• Lifetime maximum average discharge current
• Lifetime maximum average discharge power
• Lifetime average temperature
Authentication
The bq20z655-R1 supports authentication by the host using SHA-1.
Power Modes
The bq20z655-R1 supports three different power modes to reduce power consumption:
• In Normal Mode, the bq20z655-R1 performs measurements, calculations, protection decisions and data
updates in 1 second intervals. Between these intervals, the bq20z655-R1 is in a reduced power stage.
• In Sleep Mode, the bq20z655-R1 performs measurements, calculations, protection decisions and data update
in adjustable time intervals. Between these intervals, the bq20z655-R1 is in a reduced power stage. The
bq20z655-R1 has a wake function that enables exit from Sleep mode, when current flow or failure is detected.
• In Shutdown Mode, the bq20z655-R1 is completely disabled.
Copyright © 2011, Texas Instruments Incorporated
Product Folder Link(s): bq20z655-R1
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