Datasheet

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bq2084-V143

SLUS732 – SEPTEMBER 2006

VOD

The VOD bit enables a 1-s time delay in the setting of the CVOV and CVUV bits in PackStatus.

0 No delay

1 1-s delay

Misc Configuration (low) DF 0x2b

b7 b6 b5 b4 b3 b2 b1 b0

LEDRCA PFET1 PFET0 NR CHGFET 0 0 DSGOT

LEDRCA

The LEDRCA bit programs the LED to blink when there is a RemainingCapacityAlarm.

0 The LEDs blink when there is a RemainingCapacityAlarm.

1 The LEDs are off when there is a RemainingCapacityAlarm.

PFET1, PFET0

The PFETx bits define the precharge FET operation. See the bq29312 data sheet for more detail.

0,0 The bq29312 ZVCHG FET is turned on for precharge. Assumes charger has precharge function.

0,1 The charge FET is turned on for precharge. Assumes charger has precharge function.

1,0 The bq29312 OD FET is turned on for precharge. Assumes charger does not have precharge function.

1,1 Not defined, unpredictable operation

The NR bit defines whether the bq2084-V143 is to be used with a nonremovable system battery. If set to

indicate a nonremovable system battery there are additional clear conditions for a battery failure due to

overcharge, overcurrent, and overload. The additional conditions besides battery removal (defined as the loss

system present pin going high) are either detection of an opposite current of that caused the failure or when

AverageCurrent() is less than Clear Fail Current DF 0x61, 0x62 for a time defined by Fault Reset Time DF

0x130. Also, for a nonremovable battery the charge FET is left on for discharge current failures and the

discharge FET is left on for charge current failures.

0 Removable battery, battery fail conditions cleared by battery removal only.

1 Nonremovable system battery.

CHGFET

The CHGFET bit programs the charge FET to remain on even after a charge terminate condition.

0 The charge FET is turned off after a charge termination condition.

1 The charge FET is turned on after a charge termination condition.

DSGOT

When this bit is set, it allows the DSG FET to remain on after overtemperature in charge conditions

0 bq2084-V143 turns both FETs off during an overtemperature in charge

1 bq2084-V143 only turns off the CHG FET during overtemperature in charge

Misc Configuration 2 (low byte) (0x139)

b7 b6 b5 b4 b3 b2 b1 b0

0 0 SSTRING NVCELL CCDSG SOCL CVFC DEPFET

SSTRING

When this bit is set, it enables an additional 15 characters of storage for both SBS.ManufacturerName( ) and

SBS.DeviceName( ). (Storage is in separate area of data flash)

0 ManufacturerName( ) and DeviceName( ) strings are 11 and 7 characters respectively

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