BQ76930 as stand-alone fail safe
Dear Sir/Madam,I was thinking to use the BQ76930 as a battery monitor with passive top balancing. From the datasheet, I read the AFE BQ76930 will shut down the power circuit if an error occurs, it just...
View ArticleBQ40Z50 > cannot get capacity to move from 100%
Hi,I am experimenting with the bq40z50evm kit connected to two Panasonic cells in series. I'm using bqStudio 1.3.24. I am unable to get the impedence tracking functioning, unsure whether I'm missing...
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bqEasy Automatic Chemistry Selection Fail
HiI ran the automatic chemistry selection tool in bqEasy and got this error at the end "Run-time error '9': Subscript out of range", when selecting "Match Best Chemistry".I didn't skip any step in the...
View ArticleBQ78350 TRM overload missing field descriptions
Hi,We are currently setting the protection registers for the BQ78350.We are looking for the description of the fields for the overload protection, AOLD Thresholds and Delays to be more specific.There...
View Articlebq34z100 learning cycle problem
I know there have been other posts on this subject, but my problem seems to be slightly different. My battery is not updating Qmax or Updated Status on either charge or discharge, but all the relevant...
View ArticleBQ2084 seal/unseal problem
Dear All, We do development of battery pack based on BQ2084/BQ29312 and I´ve sealed this chip. There is no info how to unseal it in datasheet. BQ2048 evaluation software via EV2300 asks for some...
View Articlebq77PL900 or bq76930 separate charge/discharge paths?
Can either the bq77PL900 or bq76930 be used in a configuration that has separate discharge and charge paths?
View ArticleLost register in bq78350
I can't find the register "Min SAFE Activation Voltage" (end of section 4.3 in bq78350 TRM) in bqStudio nor can I find it in the Data Flash Summary Table (18.1).Does it really exist?Frederic
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FullChargeCapacity Changes
Hello,I'm having trouble with a 4 cell pack based around the bq20z95. Specifically, the FullChargeCapacity figure won't seem to settle. We have tested the cells with a battery analyser and found that...
View ArticleBQ27510-g2 programming using bqfs
Hi,We were programming BQ27510 with bqfs file using custom USB to I2C kit and we’re encountering errors during the Read and Compare Data command. USB to I2C communication is working as we were able to...
View Articlesome doubts on system side gauge(BQ27425)
I have some doubts regarding system side gauge.1. power on device immediately when a well-relaxed battery is attached.(no adaptor is attached)in above case, if the gauge can provide the accurate SOC？...
View Articlebq34z100 Control Sub Commands
I'm writing firmware for a MSP430F5638 to read the bq34z100 fuel gauge using I2C and have the standard and extended commands working, but have a few questions about reading the control sub command...
View ArticleBQ77PL900 Startup Timing
I have a question about the startup timing diagram for the bq77pl900. I'm interesting in the analog pins, not the digital I2C, etc. The only timing I found on the data sheet was on page 15 for the...
View ArticleBQ28550DRZR-R1 programming specification request
Hello,Let me ask you provide us programming specification for BQ28550DRZR-R1. I mean programming specification for non-volatile memory inside.Thank you in advance.BR,Frantisek
View ArticleBQ34z110 programming
Hi,I want to know if BQ34z110 can be programmed using some microcontroller I2C interface?
View Articlebq34z100 extended data command programming
Hello All,I plan to use the bq34z100 with a 6S LiPo pack but I'm really confused about how to configure the design capacity, design energy and the terminate voltage for my application. It would be...
View ArticleBQ76925 EVM Calculating Offset and Gain correction
I'm having an issue with figuring out the gain and offset correction of the BQ76925 and how it's being calculated in the Evaluation Softtware. As far as I understand from the data-sheet the values are...
View ArticleCycleCount incrementing with bq30z554 while pack at Rest
I am using a bq30z554-R1 and have issues with the CycleCount() continuously incrementing, usually about 3cycles per second until it maxes out at FFFF. In Settings/Configuration/Gauging_Configuration,...
View ArticleNTC with bq27541
In the datasheet of bq27541,The thermistor circuit requires the use of an external 10-kΩ thermistor with negative temperature coefficient (NTC) thermistor with R25 = 10 kΩ ± 1% and B25/85 = 3435 kΩ ±...
View Articlebq76pl536A / supply current before master access
Hello,Could you plase let me know the supply current of slave device before master accessing ?Since sleep bit is active default, is supply current 45uA(typ) of ICCprotect ?Best Regards,Ryuji Asaka
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