BQ40z60 TRM, What VDQ being set. What does it really mean?
VDQ is set in IT status, TRM description states "Discharge Qualified for Learning". Then I look at VDQ description in Manufacturing Access Gauging Status and it states "Discharge Disqualified form...
View ArticlePrimary Battery Fuel Gauge?
I am looking for Primary battery fuel gauges that work with Alkaline and Lithium primary batteries. Can you suggest some to me that have a widely adopted mcu interface (e.g. I2C, UART, SPI) and not HDQ...
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Impedance Track 3 for multi-cell LiFePO4 batteries
Hi,I was reading this app note And it talks about using IT3 algorithm with Lithium Phosphate batteries. On the list of devices IT3 is included on, it states the BQ20z6x series. However, on the website...
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BQ27742 - Lowering the Over Current Setting
BqChamps,I'm trying to design my BQ27742 to protect over current at 800mA.According to the datasheet this is set by the OCD register as follows.Note. OCD0 is mentioned twice, this appears to be an...
View ArticleBQ27411-G1 available capacity
HiI am currently having an issue with the BQ27411 device internal to a pack - roughly speaking I have a battery pack that contains a charger and coulomb counter. The cell is 2600mAh single cell,...
View ArticleBQ40z60 - Verify charging voltage calibration.
If I measure across VSYS and PGND on the bq40Z60EVM should this reading correlate to the bqStudio"Voltage" register?Tony
View ArticleUpdate to BQ40z50-R1
I notice there is a firmware update for the BQ40z50 device. The change list says that old devices can be upgraded.With the new BQStudio I have a BQ40z50-R1.bqz file but there is no option to program a...
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BQ40Z50-R1 CUVC, CUV problem
Welcome,I am testing of new Bq40z50-R1 in my project and I do not know how to set CUVC and CUV when the cell discharge @ -40^CIf I attach the load at -40 Celsius, the voltage across the cell...
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error in BQproduction for bq40z50
Hi all,I'm trying to operate the BQproduction system with HPA495 board.I have 2 problems which I need you assistance in solving:cannot see the check box of "cell board found" no: I am able to flash the...
View Articlebq2060a RELEARN FLAG
Datasheet states that thebq2060A sets the RELEARN_FLAG under any of three conditions: full reset, detection of 20 cycle counts without an FCC update, or a midrange voltage correction. The bq2060A...
View ArticleMinimum Voltage Output Equation SLUUA04A
In the document SLUUA04A, section 4.2 the equation for Minimum Voltage Output is Minimum Voltage Output = 610 * (1+R2/R1)which seems to make sense because R1 and R2 from figure 4-1 form a voltage...
View ArticleBQ27742 - Modify Default I2C Address
BqChamps,I'd like to modify the default I2C address from it's default which is 0xAA or 0xAB for write or read according to section 3.4 I2C Interface in the TRM. I wasn't able to find instructions or a...
View Articlebqstudio with bq27510-G3 no battery chemistry match
I am using the bq27510-G3 fuel gauge and cannot find a match for my battery. My battery is the VARTA LIC 18650-26 HC 2600mAh .I have updated the bqstudio software with the latest chemistry zip file...
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BQ27742 - Recalculating Checksum in BQStudio
BqChamps,We're playing around with the Overcurrent Protection Feature on this device and we noticed that we chantge the Overcurrent in Discharge configuration bits OCD2 OCD1 OCD0 to anything but the...
View Articlefiles for bq20z655-r1
Hello,I am using bq20z655-R1. and I wanna creat my golden image file.But I don't have any information about that!! it is the same procédure like bq20z95 ?Can I have the SLUA réference please?Thank you,
View ArticleBq40z50 not charging when EV2400 not present
I'm having an issue with a BQ40z50 fuel gauge. The pack will only charge if it's connected to an EV2400 and communicating with a PC. When I disconnect the SMBus communication lines, the pack stops...
View Articlebq40z60 - Does it support parallel cell configuration?
I have an application where we may need to increase battery design capacity. Would I be able to replace my 4S battery to a 4S2P?
View Articlebq40z50 Balancing conditions
Balancing starts when directly charging after discharging, without waiting for an OCV Measurement.Min Rsoc for Balancing is set to 80%, but it already starts balancing at a lower Rsoc. I am Using the...
View ArticleLow level I2C Comms on BQ27421-G1
Hi,I am trying to write a driver for BQ27421 for ARM Cortex processor.Just found a post here regarding I2C for BQ27425, do same rule apply for BQ27421?Also, is the address increment automatically done?...
View ArticlebqEVSW (bq27541 ev2300)
Hi Dear Frieds:RUN bqEVSWfollowing error messageRun-time error '339':Component 'bq80xRW.ocx' or one of its dependencies not correctly registered: a file is missing or invalidhow to solve this problem?
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