bq40z60 - Pre-Charge functionality?
Hi,Why does the bq40z60 require a separate pre-charge FET with current limiting resistor if it has already a built-in "smart" charger which would be able to adjust its charging current according to the...
View Articlebq40z60 - LED driver FET capacitors?
Hi,The evaluation board of the bq40z60 has a 330k + 1uF LP-Filter in the gates of all LED driver FETs. Nothing is mentioned about the reasoning behind. Is this RC-Filter required or can it be removed...
View ArticleBQ27531 not supported by bqstudio or bqEVSW
Hi All,I've had success with the bq27532 and bqStudio but have now moved to the bq27531 for a new design.The bqStudio (version 1.3.47) application does not recognize the bq27531 as a supported...
View Articlebattery gauge for BQ25892
Hello guys, I am wondering if there is any battery fuel gauge designed to work as master for BQ25892?. Like BQ24193 has its IC bq27531, it operates in slave for uC, but as master for bq24193. Can you...
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【Calibration Problem】 BQ 78350
I'm having trouble with having some errors on perform calibration. 0xF081 & 0XF082 GUI & Firmware is the latest versionHow should I do.?THANK YOU VERY MUCH!!!!
View Articlebq27542-g1 Communicate line protection
As subject, I saw there is particular protection circuit for bq27542-g1 communication line in bq27542 datasheet. Is that necessary? Because I didn't see protection circuit for communication line before...
View ArticleWhat determines end of discharge voltage on BQ3060?
Hello.I thought the CUV was the voltage at which battery stops the discharge, so I set it to 2.5V (2.5x4=10V).But now I noticed the battery is discharging only to 11.5V and then stops the discharge?Are...
View Articlebq33100 EVM- Charger connection
Hello there,I have got one BQ33100 EVM board which I want to use with 3 series Ultra-caps. As per EVM application note, I need to change R4, R5, R6, and R7 to lower the charging voltage. If that being...
View ArticlebqEASY returns "Error Logging Data: Overflow"
I ran 2 learning cycles, logging every 5 seconds, as recommended in a TI app note. It ran for a total of 4 days. The last 2 entries complain of 'possible logging error'. Now, bqEASY gives the error,...
View ArticleBQ27742 - Is it possible to use common RC filter for VCPWR and BAT pins....
Hello,I am in the process of prototyping small wearable electronic device which uses BQ27742 for battery management. It's DSBGA package is quite demanding for PCB manufacturers.My story is that I am...
View ArticleBQ34Z100-G1 State of Charge Instantly drops to 0% on Load
Hi EveryoneI am using the BQ34Z100 EVM Module to analyse a Li-Ion battery but find that after performing a learning cycle the "Update Status" never changes to "05" and as soon as I put a load on it to...
View ArticleChem ID for the BQ27530-G1
Hello,i need the Chem ID for this log file. I tried it with the Mathcad sluc138, but it doens't work.thanks.(Please visit the site to view this file)
View ArticleBQ40Z60 FET temperature measurement.
Hi,I need support to understand how the temperature measurement is carried out in BQ40Z60.according to description4.8 ThermistorsThe bq40z60 supports up to four external NTC thermistors. Each...
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bqStudio anomalies
Recently updated bqStudio to version 1.3.45. There are duplicate icons for some features (Calibration, Watch and Data Graph): see attached pic.Pressing any of these gives error messages, including this...
View ArticleBQ78350 precharge time
Hi everybody,how I can determine the precharge time for the bq78350 or is there a measurement for the voltage between pack- and pack+? I couldnt find anything in the documents about this.Thanks a...
View ArticleBQ40Z60 - Battery Pack Charging Current too HIGH
Hi,I made my own BQ40Z60 PCB based on original TI's EVM. Everything works great except charging current control. It looks there is no control.I'm using 4-cells of US18650V3 in 4S configuration. Device...
View ArticleBQ78350/Bq76940: Enter shipmode and normal mode without host-µC
Hi everybody,is there a way to change from shipmode to normalmode and h other way round without a host-µC?I am thinking about using the GPIO-pins for that but I read this just works with a host via...
View ArticleUpdate Status and Max Error bq20z65-r1
I try to do a golden file with bq20z65-r1 and battery from A123 ANR26650m1B.I follow all application report without success:When I do learning cycle, I enable IT and Update Status change to 04.I charge...
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Is random high frequency pulses can hung BQ3060?
Hello. My device has micro-controller on in which communicates to BQ3060.When battery discharges and stops the discharge, microcontroller doesn't shut down instantly but in last few miliseconds it...
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bq40z50-R1 Data Memory error
Trying to edit the highlighted value in CTO and get the following error, attempting to edit it to 5000mA
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