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SLUS785D Datasheet(PDF) 2 Page - Texas Instruments |
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SLUS785D Datasheet(HTML) 2 Page - Texas Instruments |
2 / 5 page 4 bq27500 Firmware Revision and Errata List bq27500 Firmware Revision and Errata List www.ti.com Firmware Shipment Form IC Lot Codes Discrepencies Revision v1.00 Samples A207, A20E 1. The BAT_GD pin does not operate properly based on temperature. EVMs (sampled or • SLUS785D data sheet: The BAT_GD pin and the CHG_INH bit in purchased) the Flags () register are to change state based on the values programmed in data flash (Charge Inhibit Temp Low and Charge Inhibit Temp High) as described in Table 4-4 of section 5.3.4. • Operation: The BAT_GD pin and CHG_INH bit are not influenced by the data flash values Charge Inhibit Temp Low and Charge Inhibit Temp High. The BAT_GD pin changes state when temperature exceeds the value programmed in data flash OT Chg. 2. The XCHG bit does not operate properly. • SLUS785D data sheet: The XCHG bit is set when the temperature falls outside the range set by the data flash values Suspend Temp Low and Suspend Temp High as described in Table 4-4. • Operation: The XCHG bit is not influenced by the data flash Suspend Temp Low and Suspend Temp High values. The affected material can be identified by the lot code 3. The part may not enter SLEEP Mode when discharge current is less on the bq27500 IC in the location shown in Figure 1. than Sleep Current and greater than 0. • SLUS785D data sheet: SLEEP mode is entered automatically if the feature is enabled (Operation Configuration [SLEEP] = 1) and AverageCurrent () is below the programmable level Sleep Current. • Operation: The part may not enter Sleep mode. 4. Fuel gauging with Load Mode = 1 (indicating the constant power model) does not operate properly. • 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. 5. 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. 6. 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 • Operation: The HIBERNATE bit will clear if the battery is not in a relaxed state preventing entry into HIBERNATE mode. 2 bq27500 Errata (SLUS785) SLUZ015B – October 2007 – Revised September 2008 Submit Documentation Feedback |
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