bq78350 / Pre-charge current limiting resistor
Hi all,Our customer use the bq78350 in their design.We know bq78350 can set the pre-charge current by GUI or register.They found a pre-charge current limiting resistor in document of EVM. Our customer...
View ArticleQuestions about BQ27542-G1 Interrupt!
Hi All: The BQ27542-G1 Spec says [TDD]\[ISD]\[IMAX] can be configured to trigger Interrupt. But how to clear the [TDD]\[ISD]\IMAX] bit when they are setted?? I can't find certain describes in the...
View ArticleBQ34Z110, I2C- How to write with command. (Coding Step)
Hello everyone.Bq34z110 I2C- How to write with command???I was did the below steps.1.Read PackConfiguration() : 0x961 .2.Write 0x00 to 613.Write 40H (64 subclass ID) to 3E4.Write 0x00 (Offset) to...
View Articlebq20z90+bq29330 DSG external protection mosfet damage
Hi,We have some question need to clarify,please refer to below: 1) Can any protection components/ circuit be added to this positive line? Example, adding a TVS and etc2) What is the ESD level...
View ArticleBQ34z100 Calibration
I´m using the bq34z100-g1 EVM in a 9S1P configuration. bqStudio V1.3.45 Changing the voltage divider was successful, but calibration can not be executed. Also the programming function and exporting the...
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how access to bq34z110 CONTROL register.
http://cromagn.blogspot.kr/2015/01/set-up-test-usb-to-i2c-iic-spi-uart-ttl.html I bought I2C analyzer.how access to CONTROL regsiter ?I want to read CONTROL register. Control register acccess is...
View ArticleBQ40z50 sampling frequency/bandwidth
HiAs in subject, please share this data.Best regards
View ArticleReally basic BQ34Z100 question on SRN and SRP
New user to Fuel Gauge functionCan anyone tell me: Rsense is connected between SRP and SRNwhereSRP connects to BAT -ve (battery negative terminal)SRN connects to PACK -vewhere does PACK -ve suppose to...
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BQ40Z60EVM-578 not charging/discharging
I've have recently bought a BQ40Z60 eval kit with EV2300 interface and I'm trying to enable the charge and discharge FETs from BQStudio, but I'm not getting any output voltage on the VSYS terminal. The...
View Articlebq27541
We have been using the bq27541 for several years now for two differnet battery packs. Recently (today) while researching field problems I discovered that I could write our standard dfi file to our high...
View Articleupdate CHEM file
dear all,in BQ40Zxx and BQ20Zxx family,is there a way to change the Chem id data by writing word or block?or is it the only way to change is by BQeasy/BQstudio with the chem ID files.regards,
View ArticleBQ34Z110 lead acid gas suage
Our customer wants to develop a lead acid battery gas guage with >50A charge and discharge current. Do we have any good suggestion?I can see bq34Z110 is NRND. The only product seems to be...
View ArticleBQ34Z100-G1 without Thermistor?
We want to use the BQ34Z100-G1 with 4 NiMh-cells in series.The batteries are replaceable and spatial separated from the gas gauge, with a wired connection to the pcb.Max. Charge current is 1A.Can we...
View Articlebq27421 wrong state of charge value after hibernate
Hi,I am using the bq27421 on my custom board. It is connected to a 150 mA/H Lithium-ion battery. I only configure the bq27421 design capacity and termination voltage parameters. I am experiencing the...
View ArticleBq34z110 - I would like to know how to use the ' IAR Embedded Workbench ' to...
Hi.I would like to know how to use the ' IAR Embedded Workbench ' to write 'bq34z110 I2c'' HAL_StatusTypeDef HAL_I2C_Mem_Write(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress,...
View ArticleBQ27510 Bad battery capacity
Hi,On a device, we use a BQ27510 fuel gauge which measure a LiPo battery. We create the golden pack file for the battery and the electronics board. This device is in mass production and works pretty...
View Articlebq27520 Max Capacity ?
The datasheet mentions 32Ah, but there is a remark that 32Ah changed to 14500mAh, but the Rev. B datasheet is quite new, so could someone clarify what is the real max. capacity handled by bq27520...
View ArticleBQ78412 vs BQ34Z100-G1 - Battery Yuasa NPL38-12IFR
Dear team,My customer will soon test a new design and selected BQ74812 for its gas gauge.Since the project will be in production for several years, I guess this would be best for them to use...
View ArticleBQ27505 - EOL or at least NRND
Hi,Looks like the BQ27505YZGT-J5 is going EOL or at least NRND. I have been using it because of the small footprint. I would be interested in finding out about replacements - perhaps parts that use...
View ArticleBQ40z60 EVM - wakes up then sleeps in 30 seconds
Dear Forum, We recently got a BQ40z60EVM - 578, which is a charger and gauge board for use with Li-ion batteries with 2s-4s configuration. I am trying to test using 2 cells in series. As instructed in...
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