bq27421-G1 and PMIC
We are planning to add fuel gauge function to our handheld device based on AM335x + TPS65217C PMIC (a beaglebone black clone).In bq27421-G1 TRM page 10, section 2.4.6 HIBERNATE Mode, quote:It is the...
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Impedance Track Algorithm not working as expected ?
Hi, We are currently testing the BQ34Z110EVM and are facing difficulties ...You can see from the screen bellow that the State of Charge is not being properly calculated, as there are discontinuities...
View Articlestacking BQ76940 + BQ78350 combo
I am working on an automotive EV BMS, and I really like some of the BQ76940 specs working in combo with BQ78350 .The BMS I would like to design would have 30 x 100AH, in an 1P30S configuration.I want...
View ArticleBQ78350 disable ALERT signal on BQ769x0
Hi,We are using the BQ78350 with the BQ76940 and the documentation for the BQ769x0 says that we need to write to the SYS_STAT register to clear the bit that set the ALERT pin.The 0x58 SBS command from...
View ArticleLow power gas gauge for CR123
Hello,I'm interested in a fuel gauge for a removable, non-rechargeable CR123 (LiMnO2) battery that would operate under very low-power conditions. As a starting point, an average current consumption of...
View Articlewhat's the I2C signal's voltage when BQ34Z100 is in the full sleep mode
Hi what's the BQ34Z100 I2C signals's (SDA and SLC) voltage when BQ34Z100 is in the full sleep mode? is it 3.3 V or 0V? Best regards,zhiyong
View ArticleBQ27541 - RSENSE Resistor Purpose
Hi Sir/Madam,Can you please explain me the purpose of Rsense resistor which is connected between SRP & SRN pin of BQ27541-G1?.The resistance range mentioned in data sheet is around 5mOhm to...
View ArticleBQ27500DRZR-V130 alternate part
Hi Pls advise on below As per web info BQ27500DRZR-V130 is NRND & mentioned alternate part as BQ27150-G3. Is it drop in replacement. Also please let me know the software compatibility of the new...
View ArticleUse TI-27621-G1 gauge to update RAM parameter but get FAILURE and why?
When our device insert battery (4200mAh) for the system, I would like to update RAM parameterby changing default 2425mAh to 4200mAh to get correct charge info from gauge. but when I follow spec’s...
View ArticleBQ27510 Dataflash Programming
Hello,I want to read and write the flash in production like described in SLUA449 with a visual basic program. There are diagrams explain the way to read and write the flash at the beginning of page 9...
View ArticleBQ34Z110 for Panasonic baterries
Good morning,we're trying to measure capacity of battery by BQ34Z110. Could you send me please chemID (config file) for Panasonic LC-R127R2PG1? We've tried to ask manufacturer of battery, but we were...
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Bq34z110 cominication problem with EV2300
Hi, Im trying to connect with my Bq34z110 EVM with an EV2300 to the evaluation software using the I2C and I get the next message Followed byI have checked the conections and there are fine, I have...
View Articlebq27010, primary Lithon battery,DCOMP,discharge compensation coefficient
HiI am using BQ27010 to monitor battery capacity for primary Lithion battery. there is no charge activity in this application.with my load at a constant discharge rate, the reported time to empty is...
View ArticleBQ20z65 Charge Pump Maximum Voltage
Hello Ti.1. We are in middle of a safety related certification which requires us to declare BQ20z65 Internal Charge Pump Maximum Voltage under any fault condition.2. Or otherwise specify the charge...
View ArticleFuel gauge for primary battery with flash memory
I require a fuel gauge and an hour-counter for a 36V 8Ah LiSO2 primary battery. (12 series connected Lithium Sulphur Dioxide cells of 3V each).The fuel gauge should only be powered when a switch is...
View ArticleBQ34Z100 FCC and RC suddenly drops or goes to 0 after 19 cycles
Dear all,Our fuel gauge works with LI-ION pack 20S20P or 20S10P and measuring voltage from lower 10 cells.We were looking on forum but we cant find out what we do wrong.Everything seems to be OK, we...
View ArticleBQ20z95 PEC verification bug
We have a Medical device using a vendors product that uses the BQ20z95 gauge. We want to use PEC as SMBus data verification in our SMBus host device acting as master requesting data from the BQ20z95...
View Articlebq24735 and the bq40Z50 for Lithium Ion battery Management
Hi,I wish to use the bq24735 and the bq40Z50 for a 4 cell Lithium Ion battery system. I have ordered both EVMs. I wish to clarifyIf I can hang both the bq40zEVM and bq24735 EVM off the battery pack...
View ArticlebqEVSW for the bq20z75-v180
I am using bq Evaluation Software Version 0.9.59. This version of software does not support the bq20z75-v180. The software help says "Any target that does not appear on the screen is not supported by...
View Articlehow are TS faults reported on BQ24266?
How are TS faults reported on the BQ24266?On BQ24266 datasheet page 4TS pin5 description is: “Battery Pack NTC Monitor. Connect TS to the center tap of a resistor divider from DRV to GND. The NTC is...
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