BQ40Z50 DOD0 VS Vcell
For BQ40Z50 pack with correct chemical ID, Does the DOD0 for cells in Gauging status2 will update when gauge take OCV? Is the DOD0_x update based on the cell voltage?Is the direction that the higher...
View ArticleCells string over 1000V using bq76PL536
Dear all,We want to reach high voltage connecting 376 LiFePO4 series cells. As the bq76PL536A can monitor a stack up to 192 cells, would be possible split this stack in 2 and use 2 ICs monitoring 188...
View ArticleSchematic Review: BQ27421-G1
Hi Forum,I have customer in need of a schematic review for a UHF radio sleeve for smartphones. Please review the schematic for the part in the subject line. SCHEMATIC1 _ PAGE4.pdfThanks for your help!Jay
View ArticleBQ78350 coulomb counter went wrong after shutdown
Following a full discharge cycle matching the expected FCC by 0.1% (very good!!), I charged the pack to about 55% (~7300mAh).I sent (twice) the shutdown command to my BQ78350. It went down properly, or...
View Articlebq27421 footprint
Hello,Could someone please direct me to where to find a TI recommended PCB footprint for the bq27421? Thanks,
View ArticleBQEASY and NCR18650
I am going through the setup phase in BQEASY with a 27541 and was wondering how to determine what to enter for taper current? We are using a pack consisting of 3 groups of 6 cells in parallel to make...
View ArticleUsing More than one External Temp Sensor on a BP76920+BQ78350
From customer:Can you please find out if there is any way of getting more than one external temperature sensor on a bp76920+bq78350 - based solution? This is very important to us. If the answer is no,...
View ArticleBQ34Z100-G1 EVM
Hello,The BQ34Z100EVMproduct folder is not clear about which chip is being shipped on the board currently.The BOM in the EVM User's Guide for the BQ34Z100EVM lists the BQ34100PW-G1 as the IC gas gauge....
View ArticleBQ40Z50 BMS SMbus - Is it possible to alter the device address
Hello TI community,I am currently working on a 4s configuration 20 Ah battery pack and I was wondering if it is possible to change the device address for smbus purposes such that multiple devices can...
View Articlechemistry loading on bq78350 w/o bqstudio
How do one load a chemistry into the bq78350 without using bqstudio?
View ArticleBQ78350 DOD at EDV2 vs Battery Low
BQ78350 TRM p.52:" DOD at EDV2 should be initialized to (1 – Battery_Low%) × 16384, where Battery_Low% = Battery_Low% ÷ 2.56. "Battery_Low% = Battery_Low% ÷ 2.56 is suspect.Only Battery_Low%=0 can make...
View ArticleBQ78350 Wake From Sleep
When the BQ78350 wakes up from sleep mode, can it be configured to automatically turn on the DSG and CHG outputs?
View ArticleBQ78350 FCC vs reserve capacity vs update
Can you explain the relation between reserve capacity and full charge capacity when it comes to learning (FCC update)?BQ78350 TRM section 8.1.9 states:"The value of Reserve Capacity is subtracted from...
View Articlebq76940 - CHG_ON and DSG_ON failed to turn on
hi,please, whenever i set CHG_ON or DSG_ON, the SCD and OCD turned to 1 immediately that's caused both charge and discharge mosfet failed to turn on.when set CHG_ON, the SCD turned to 1 immediatelywhen...
View ArticleBQ2014: NAC is not updated
Use the BQ2014, and have obtained the charge capacity of Ni-MH batteries.NAC is not updated when you charge or discharge.Reproduction frequency is very low, it is not yet confirmed only once.1. I can...
View ArticleBq34z110: Transfer data to flash problem using micro controller in C,...
After many hours of trying, I still cannot change the bz34z110 flash content .The idea was to start with something easy like changing the serial number, as one can read it back to verify that the flash...
View ArticleImplementing the bq29702 for a single Li+ battery
Hello,I am searching for a battery protection chip capable of UVP, UVP . Overcurrent is not really necessary, because charging current is limited and supervised by the battery charging IC.Using TI's...
View ArticleFAS bit clear problem of bq34z110
Hello!The following problems occurred during my studying the bq34z110 (With EV2300).I changed to a mistake Unsealed code "0000 0000", and the Full Access Code "0000 0000" to have changed.Then [FAS] bit...
View ArticleClik here to view.
Depleted Voltage
Hello,We are developing a 2 cell pack with the bq20z95 gauge and bq24765 charger and have chosen a Depleted Voltage threshold of 5000mV and set the CS_XCHGLV bit, so that the DSG FET opens when the...
View ArticleZero Volt charging -- SLUS757C
I'd like some help with Zero Volt charging. SLUS757C, p. 3 states that the PMS pin should be connected to PACK to enable 0V precharge using the charge FET, yet SLUU264a, p. 35 suggests that PMS = GND...
View Article