bq20z65-R1

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SLUS990 – DECEMBER 2009

Lifetime Data Logging Features

The bq20z65-R1 offers lifetime data logging, where important measurements are stored for warranty and

analysis purposes. The data monitored include:

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Lifetime maximum temperature

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Lifetime maximum temperature count

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Lifetime maximum temperature duration

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Lifetime minimum temperature

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Lifetime maximum battery cell voltage

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Lifetime maximum battery cell voltage count

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Lifetime maximum battery cell voltage duration

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Lifetime minimum battery cell voltage

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Lifetime maximum battery pack voltage

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Lifetime minimum battery pack voltage

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Lifetime maximum charge current

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Lifetime maximum discharge current

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Lifetime maximum charge power

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Lifetime maximum discharge power

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Lifetime maximum average discharge current

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Lifetime maximum average discharge power

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Lifetime average temperature

Authentication

The bq20z65-R1 supports authentication by the host using SHA-1.

Power Modes

The bq20z65-R1 supports 3 different power modes to reduce power consumption:

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In Normal Mode, the bq20z65-R1 performs measurements, calculations, protection decisions and data

updates in 1 second intervals. Between these intervals, the bq20z65-R1 is in a reduced power stage.

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In Sleep Mode, the bq20z65-R1 performs measurements, calculations, protection decisions and data update

in adjustable time intervals. Between these intervals, the bq20z65-R1 is in a reduced power stage. The

bq20z65-R1 has a wake function that enables exit from Sleep mode, when current flow or failure is detected.

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In Shutdown Mode the bq20z65-R1 is completely disabled.

Copyright © 2009, Texas Instruments Incorporated

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