Datasheet

bq34z100

www.ti.com

SLUSAU1B –MAY 2012–REVISED DECEMBER 2012

Table 8. Current Model Used when Load Mode = 0

Load Select Value Current Model Used

0 Average discharge current from previous cycle: There is an internal register that records the average

discharge current through each entire discharge cycle. The previous average is stored in this register.

1 (default) Present average discharge current: This is the average discharge current from the beginning of this

discharge cycle until present time.

2 Average Current: based on the AverageCurrent()

3 Current: based on a low-pass-filtered version of AverageCurrent() (τ=14s)

4 Design Capacity / 5: C Rate based off of Design Capacity /5 or a C / 5 rate in mA.

5 Use the value specified by AtRate()

6 Use the value in User_Rate-mA: This gives a completely user configurable method.

If Load Mode = 1 (Constant Power) then the following options are available:

Table 9. Constant-Power Model Used when Load Mode = 1

Load Select Value Power Model Used

0 (default) Average discharge power from previous cycle: There is an internal register that records the average

discharge power through each entire discharge cycle. The previous average is stored in this register.

1 Present average discharge power: This is the average discharge power from the beginning of this discharge

cycle until present time.

2 Average Current × Voltage: based off the AverageCurrent() and Voltage().

3 Current × Voltage: based on a low-pass-filtered version of AverageCurrent() (τ=14s) and Voltage()

4 Design Energy / 5: C Rate based off of Design Energy /5 or a C / 5 rate in mA .

5 Use whatever value specified by AtRate().

6 Use the value in User_Rate-mW/cW. This gives a completely user-configurable method.

Reserve Cap-mAh

Reserve Cap-mAh determines how much actual remaining capacity exists after reaching 0

RemainingCapacity(), before Terminate Voltage is reached. A loaded rate or no-load rate of compensation can

be selected for Reserve Cap by setting the [RESCAP] bit in the Pack Configuration register.

Reserve Cap-mWh/cWh

Reserve Cap-mWh determines how much actual remaining capacity exists after reaching 0 AvailableEnergy(),

before Terminate Voltage is reached. A loaded rate or no-load rate of compensation can be selected for

Reserve Cap by setting the [RESCAP] bit in the Pack Configuration register.

Design Energy Scale

Design Energy Scale is used to select the scale/unit of a set of data flash parameters. The value of Design

Energy Scale can be either 1 or 10 only.

When using Design Energy Scale = 10, the value for each of the parameters in Table 10 must be adjusted to

reflect the new units. See X10 MODE.

Table 10. Data Flash Parameter Scale/Unit-Based on Design Energy Scale

Data Flash Parameter Design Energy Scale = 1 (default) Design Energy Scale = 10

Design Energy mWh cWh

Reserve Energy-mWh/cWh mWh cWh

Avg Power Last Run mW cW

User Rate-mW/cW mWh cWh

T Rise No Scale Scaled by X10

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