Texas Instruments | bq40z50-R2 v2.08 to v2.11 Change List (Rev. A) | Application notes | Texas Instruments bq40z50-R2 v2.08 to v2.11 Change List (Rev. A) Application notes

Texas Instruments bq40z50-R2 v2.08 to v2.11 Change List (Rev. A) Application notes
Application Report
SLUA880A – March 2018 – Revised April 2018
bq40z50-R2 v2.08 to v2.11 Change List
ABSTRACT
This document describes the changes made from bq40z50-R2 v2.08 to v2.11, as well as new features
and bug fixes The bq40z50-R2 ICs will continue shipping with v2.08 pre-programmed, but v2.11 is
available for download from ti.com. All previous versions of bq40z50 ICs can be upgraded to run v2.11.
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Contents
Introduction ................................................................................................................... 2
Change Details ............................................................................................................... 3
Trademarks
All trademarks are the property of their respective owners.
SLUA880A – March 2018 – Revised April 2018
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BQ40Z50-R2 v2.08 to v2.11 Change List
Copyright © 2018, Texas Instruments Incorporated
1
Introduction
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Introduction
bq40z50-R2 firmware version 2.11 has been released to enable several feature additions and
performance improvements.
To work with bq40z50-R2 v2.11, download and install the latest version of the Battery Management Studio
(bqStudio) evaluation software from ti.com. Alternatively, place a copy of the 4500_2_11-bq40z50R2.bqz
file in to the following directory before launching bqStudio: C:\ti\BatteryManagementStudio\config.
The existing bq40z50, bq40z50-R1, and bq40z50-R2 integrated circuits and evaluation modules (EVMs)
can be upgraded to bq40z50-R2 v2.11 firmware by programming the .srec firmware file for v2.11.
An installer is available from the Software section of the bq40z50-R2 product folder on ti.com, which
places the v2.11 .srec and .bqz files on the PC. If users have any existing golden .srec files used for the
bq40z50-R2 v2.08 firmware, they can be migrated to v2.11.
The recommended steps to migrate from v2.08 to v2.11 firmware using bqStudio follow:
1. Program an existing v2.08 .srec golden file in to a bq40z50EVM.
2. Export a .gg.csv file with _v208_golden.gg.csv in the filename.
3. Use the CHEM_ID button to confirm the chemistry ID used in the file.
4. Program the default v2.11 .srec file.
5. Export a .gg.csv file with bq40z50-R2_v211_default.gg.csv in the filename.
6. Compare the two files. Copy the firmware versions and build numbers from the v2.11 file header to the
v2.08 file and save the new file with _v211_goldendraft.gg.csv in the filename.
7. Import the new gg.csv file into the IC.
8. Program the desired chemID using the Chemistry plugin—this overwrites the learned Ra tables and Ra
flags back to the default and unlearned values, so the user must manually update the tables back to
the learned values after programming the chemID.
9. Review all other data flash parameters and modify if desired.
10. Export a new _v211_golden.gg.csv file.
11. Export a new _v211_golden.srec file to use for production.
No change in gauging performance is expected due to the firmware upgrade, but testing is recommended
to ensure the process was followed correctly.
2
BQ40Z50-R2 v2.08 to v2.11 Change List
Copyright © 2018, Texas Instruments Incorporated
SLUA880A – March 2018 – Revised April 2018
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Change Details
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2
Change Details
Table 1. Change Details
CHANGE HIGH-LEVEL
DESCRIPTION
Repair timing issue with
AD conversions on entry
to and exit from Sleep.
bq40z50-R2 v2.11
bq40z50-R2 v2.08
COMMENTS
If Sleep mode is
used there is a small
but non-zero chance
for incorrect ADC
Sleep mode should not be enabled if using v2.08, or
readings to occur,
there is a possibility for a false PF to occur.
leading to large
temporary jumps in
measured voltages
and temperatures.
Bug fixed.
Add new
[CUDEP_REQ_CHG]
option to the Protection
Configuration data flash
parameter.
New feature.
Bit is marked as
[CUDEP_REQ_CHG].
Feature does not
exist.
Bit is marked as
[RSVD].
When enabled, the charging voltage and current
requested will be non-zero during the CUDEP period
(when SUV_MODE = 1).
When the battery voltage is below CVUV and the
gauge wakes up from shutdown, some systems using
v2.08 firmware were unable to charge the battery. The
following happens:
On wake up from shutdown, the gauge performs a
copper deposition check. As part of this check the
following tasks are carried out:
1) Turn off DFET and CFET.
2) Request Charging Voltage and Charging Current = 0
(in v2.08).
Some chargers interpret the request for Charging
Voltage = 0 to mean that they should turn off
completely. This can result in no power from the
battery or charger and the system may crash.
In v2.11 the user has the option to enable this bit to
specify a non-zero Charging Voltage and Charging
Current during the copper deposition check period.
Actual charge current would be blocked during the
check because FETs will be off temporarily.
Prevent sleep during
copper deposition check
period.
Will not sleep during
CUDEP period.
Sleep allowed
during CUDEP
check period.
In v2.11, when [SUV_MODE] is enabled the gauge will
not be allowed to enter Sleep mode at POR until the
SUV check has passed.
Fix timing for [CS_CV]
feature.
Time Interval units are Time interval units
1 s.
are 0.8 s. This does
This matches
not match
documentation.
documentation.
Only relevant if Charging Configuration: [CS_CV] is
enabled. This feature is disabled by default in both
versions.
ASCC, AOLD, and
ASCD Latch Counters
Fix AFE latch safety
decrement and reset
never clearing due to
correctly, per
latch decay gated by latch documentation. Okay
status.
to use ASCCL,
AOLDL, and ASCDL
protections if desired.
ASCC, AOLD, and
ASCD Latch
Counters do not
decrement and reset
per documentation,
possibly causing
These protections are disabled by default in both
spurious ASCCL,
versions.
AOLDL, and ASCDL
protection to be
triggered.
Recommend
keeping these
protections disabled.
Removed Valid Wake up
Data flash parameter
Comm check Delay from
not present.
data flash.
Data flash
parameter visible
but unused.
SLUA880A – March 2018 – Revised April 2018
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This parameter is not used in either version, so it has
been hidden.
BQ40Z50-R2 v2.08 to v2.11 Change List
Copyright © 2018, Texas Instruments Incorporated
3
Revision History
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Revision History
Changes from Original (March 2018) to A Revision ....................................................................................................... Page
•
•
4
Changed column headers of Change Details table to include version number ................................................... 3
Added the Removed Valid Wake up Comm check Delay row to the Change Details table ..................................... 3
Revision History
SLUA880A – March 2018 – Revised April 2018
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Copyright © 2018, Texas Instruments Incorporated
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