5

bq27500 Firmware Revision and Errata List

www.ti.com

bq27500 Firmware Revision and Errata List

Firmware

Shipment Form

IC Lot Codes

Discrepencies

Revision

v1.02

Samples and production

D4NE, A207,

1.

The part may not enter SLEEP Mode when discharge current is less

shipments

K042, K043,

than Sleep Current and greater than 0.

K04R

EVMs (sampled or

• SLUS785D data sheet: SLEEP mode is entered automatically if the

purchased))

feature is enabled (Operation Configuration [SLEEP] = 1) and

AverageCurrent () is below the programmable level Sleep Current.

• Operation: The part may not enter Sleep mode.

The affected material can be identified by the lot

2.

Fuel gauging with Load Mode = 1 (indicating the constant power model)

code on the bq27500 IC in the location shown in

does not operate properly.

Figure 1.

• SLUS785D data sheet: Section 5.2.1 allows the selection of a

constant current fuel gauge model or constant power fuel gauge

model.

• Operation: Only the constant current fuel gauge model operates

(Load Mode = 0) properly. For the bq27500, this is the

recommended configuration.

3.

Wake from HIBERNATE mode may require multiple communication

attempts.

• SLUS785D data sheet: Section 5.7.4. The gauge remains in

HIBERNATE mode until the battery is removed or the system issues

a direct I2C command to the gauge.

• Operation: Wake from HIBERNATE mode requires multiple direct

communication attempts.

4.

The part may not enter HIBERNATE mode with [HIBERNATE] = 1 in

CONTROL_STATUS

• SLUS785D data sheet: Section 5.7.4. The gauge enters

HIBERNATE when HIBERNATE = 1 in CONTROL_STATUS register

and a valid OCV measurement is taken AND the current drops

below Hibernate Current.

• Operation: The HIBERNATE bit will clear if the battery is not in a

relaxed state preventing entry into HIBERNATE mode.

SLUZ015B – October 2007 – Revised September 2008

bq27500 Errata (SLUS785)

3

Submit Documentation Feedback