TI SLUS785D

Errata
SLUZ015B – October 2007 – Revised September 2008
bq27500 Errata (SLUS785)
1
Summary
This errata summarizes the discrepancies among firmware versions 1.00, 1.02, 1.06, and 1.08 of the
bq27500 and the data sheet, SLUS785D.
• Part Numbers—bq27500drzr, bq27500drzt, and bq27500EVM
• Lot Code—A207, A20E, DHNE, K042, K043, K04R (See Section 3 package markings diagram to
identify affected material)
• Product Type—bq27500 IC samples (or purchased), bq27500 EVM sampled or purchased
• Device Version—1.00, 1.02, 1.06, 1.08
2
Discrepancies
See the following tables for a list of discrepancies for device versions 1.00, 1.02, 1.06, and 1.08.
3
Identification of Affected Materials
The affected material can be identified by the top-side brand on the bq27500 IC in the location shown in
Figure 1, as LLLL.
Figure 1. bq27500 IC Markings
BQ
2750
TI S
LLLL
o
Note:
BQ
TI
S
LLLL
O
Symbol in lower case
TI logo
Assembly site
Lot Code (e.g. A207)
Pin 1 Locator
IC Markings are left-aligned.
SLUZ015B – October 2007 – Revised September 2008
Submit Documentation Feedback
bq27500 Errata (SLUS785)
1
bq27500 Firmware Revision and Errata List
4
www.ti.com
bq27500 Firmware Revision and Errata List
Firmware
Revision
Shipment Form
IC Lot Codes
v1.00
Samples
A207, A20E
EVMs (sampled or
purchased)
Discrepencies
1. The BAT_GD pin does not operate properly based on temperature.
•
SLUS785D data sheet: The BAT_GD pin and the CHG_INH bit in
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
2
bq27500 Errata (SLUS785)
•
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.
SLUZ015B – October 2007 – Revised September 2008
Submit Documentation Feedback
bq27500 Firmware Revision and Errata List
www.ti.com
5
bq27500 Firmware Revision and Errata List
Firmware
Shipment Form
Revision
v1.02
Samples and production
shipments
IC Lot Codes
D4NE, A207,
K042, K043,
K04R
EVMs (sampled or
purchased))
The affected material can be identified by the lot
code on the bq27500 IC in the location shown in
Figure 1.
Discrepencies
1. The part may not enter SLEEP Mode when discharge current is less
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.
2. 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.
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
SLUZ015B – October 2007 – Revised September 2008
Submit Documentation Feedback
•
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.
bq27500 Errata (SLUS785)
3
bq27500 Firmware Revision and Errata List
6
www.ti.com
bq27500 Firmware Revision and Errata List
Firmware
Revision
Shipment
Form
IC Lot Codes
v1.06
Samples and
production
shipments
Any other code not
listed for Revision
v1.00 or v1.02.
The affected material can be identified by the lot code on
the bq27500 IC in the location shown in Figure 1
Discrepencies
1.
2.
3
4
5
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.
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 tak0en 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.
The part enters HIBERNATE mode based on battery voltage less
than Hibernate Voltage unconditionally.
•
SLUS785D Datasheet: Section 5.7.4. The gauge enters
HIBERNATE when a valid OCV measurement is taken.
•
Operation: The part enters HIBERNATE mode
unconditionally with Vcell (battery voltage) less than
Hibernate Voltage.
The part may exit HIBERNATE mode on I2C communication
which is not directed to the bq27500.
•
SLUS785D data sheet: Section 5.7.4. I2C communication
that is not directed to the gauge does not wake the
gauge.
•
Operation: The part may exit HIBERNATE mode on 12C
communication which is not directed to the gauge
The part does not always take an OCV reading upon exiting
HIBERNATE mode.
•
SLUS785D data sheet: Section 5.7.4. After waking, the
gauge can proceed the initialization of battery information
(eg OCV).
•
Operation: The part may not always take an OCV reading
upon exiting HIBERNATE mode.
Firmware revision v1.08 of bq27500 (Part number bq27500-V100) corrects the discrepancies in firmware revision v1.06.
4
bq27500 Errata (SLUS785)
SLUZ015B – October 2007 – Revised September 2008
Submit Documentation Feedback
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements,
and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should
obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are
sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard
warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where
mandated by government requirements, testing of all parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and
applications using TI components. To minimize the risks associated with customer products and applications, customers should provide
adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right,
or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information
published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a
warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual
property of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied
by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive
business practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional
restrictions.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all
express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not
responsible or liable for any such statements.
TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably
be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing
such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products
and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be
provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in
such safety-critical applications.
TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are
specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military
specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at
the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use.
TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are
designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated
products in automotive applications, TI will not be responsible for any failure to meet such requirements.
Following are URLs where you can obtain information on other Texas Instruments products and application solutions:
Products
Amplifiers
Data Converters
DSP
Clocks and Timers
Interface
Logic
Power Mgmt
Microcontrollers
RFID
RF/IF and ZigBee® Solutions
amplifier.ti.com
dataconverter.ti.com
dsp.ti.com
www.ti.com/clocks
interface.ti.com
logic.ti.com
power.ti.com
microcontroller.ti.com
www.ti-rfid.com
www.ti.com/lprf
Applications
Audio
Automotive
Broadband
Digital Control
Medical
Military
Optical Networking
Security
Telephony
Video & Imaging
Wireless
www.ti.com/audio
www.ti.com/automotive
www.ti.com/broadband
www.ti.com/digitalcontrol
www.ti.com/medical
www.ti.com/military
www.ti.com/opticalnetwork
www.ti.com/security
www.ti.com/telephony
www.ti.com/video
www.ti.com/wireless
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2008, Texas Instruments Incorporated