BQ34Z653 Datasheet, PDF (15/25 Pages) Texas Instruments – SBS 1.1-Compliant Gas Gauge and Protection Enabled with Impedance Track with External Battery Heater Control and LCD Display

bq34z653
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SLUSB53 – JULY 2012
Gas Gauging
The bq34z653 uses the Impedance Track Technology to measure and calculate the available charge in battery
cells. The achievable accuracy is better than 1% error over the lifetime of the battery and there is no full charge
discharge learning cycle required.
See Theory and Implementation of Impedance Track Battery Fuel-Gauging Algorithm application note (SLUA364)
for further details.
Lifetime Data Logging Features
The bq34z653 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 bq34z653 supports authentication by the host using SHA-1.
Power Modes
The bq34z653 supports three different power modes to reduce power consumption:
• In NORMAL mode, the bq34z653 performs measurements, calculations, protection decisions and data
updates in 1-second intervals. Between these intervals, the bq34z653 is in a reduced power stage.
• In SLEEP mode, the bq34z653 performs measurements, calculations, protection decisions, and data updates
in adjustable time intervals. Between these intervals, the bq34z653 is in a reduced power stage. The
bq34z653 has a wake function that enables exit from SLEEP mode when current flow or failure is detected.
• In SHUTDOWN mode, the bq34z653 is completely disabled.
Copyright © 2012, Texas Instruments Incorporated
Product Folder Link(s): bq34z653
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