bq769x0 Shutdown and Wake Up
Hello,What pins are active in the bq769x0 during shutdown? Are the CAPx pins low to their respective references? I assume REGOUT would be off.I'm going to use the bq76930, but I need a way to wake it...
View ArticleDataFlash Checksum
Hi,I have written an app to write a DFI file to my BQ20z65-R1 (or BQ20z95) which, as per SLUA355, does the following:Puts the device in ROM mode Erases a row (x11) Write a row (x10) <repeat on every...
View ArticleBQ27520 have some question of learning cycle
we use the BQ27520 Gas Gauge on my device . first we use the BQESW software and bqeasy option to setting all of battery data flash and parameter step by step. we have some question , and need to...
View ArticleBQ34Z110 optimize
hi,we used powersonic PS12200NB battery. it's 20Ah/12V lead acid battery.could we characterize battery according datasheet Optimization process? or we need use mathcad to characterize the...
View Articlebq40z50 - how to start
Hi,we will use the bq40z50 for an 2-Cell Li-Ion battery pack in an microcontroller driven device.I've read the thread "Introduction to Multi-Cell Gas Gauges" on top of this forum and some other...
View ArticleNeed help generating a golden image with a BQ20z75
I'm currently in the process to make a golden image for one of our customer.The battery pack is build around 2 Panasonic NCR18650A in serial and a small board build around a BQ20Z75v-180.We use an...
View Articlebq40Z50 calibration
In section 11.2 of the 40z50 TRM, a reference to a "Calibration Application Note" is made.Does this document exist yet? This sounds like an ideal method of calibration in a production environment.
View ArticleLooking for help in choosing a Fuel gauge for robotics application
I am new to battery management and I have been reading a great deal of information causing information overload and confusion. I am working with a 4S3P lithium Battery pack with an external charger and...
View ArticleProblem with recalculating percentual stat of Battery charge at BQ20Z45-R1
Hello,I have a calibrated battery pack, with 4S4P(16psc) composed of battery cells NCR18650B, and when I start the discharge cycle, occurs multiple times recalculated parameter "Full charge Capacity"...
View ArticleWhich BM IC should I choose?
Hi,I am trying to choose a suitable SBS 1.1 compliant design for a 4S2P or 4S3P Li-Ion pack. I have googled but been unable to find very many ready-made packs that would suit my needs. I am therefore...
View ArticleBq34z100 higher capacity
Hello,I am student in Austria and a develop in my diploma project a mobile power supply for notebooks. I use the bq34z100 for fuel gauging. Our LiIon Batteries has a capacitiy from 68Ah. The bq34z100...
View Articlebq20z451 version 0511
Hi All !I have bq20z451 v.0511SEAL = ONQuestion: how to initiate the procedure UNSEAL?If someone knows - please write me an email: vvg@skyline.od.uaAny ideas - are welcome.Chip name: bq20z451 H/W...
View ArticleActive cell balancing
Dear All,I am looking for active cell balancing approaches from TI and came across the power pump technology. I was really interested in it and thought of building one such active cell balancing...
View ArticleBq20z4x lifetime data become "0" issue
Hi,I met a pack, the initial phenomenon is power over-consumption cause VSHUT and SUV flag set.When got and wake up the pack, observed the lifetime were show “0”, we export and write failure SENC to...
View ArticleProblem with learning cycle of bq27000
Hi,We have a problem with needing too many learning cycles for new batteries using the bq27000.It seems that one learning cycle is not enough for our battery (capacity 830mAhr).After a learning cycle...
View Articlebq34z100 has unreliable SoC when there is high current on start up
We are using a bq34z100 to gas gauge a 3 cell Li ion battery. Our circuit is very similar to Figure 8 Multi-Cell and 5-LED Display in the bq34z100 datasheet. The usual current draw for our product is...
View ArticleClik here to view.
BQ Evaluation Software : Modifying Data Flash using GUI
Hi ,I am using the BQ34Z100 EVM with BQ Evaluation S/W , I am able to write to Control() from the data RAM screen but can't modify the Data Flash Contents , The following are the steps i took to...
View Articlebq34z110 Accesing data flash
Hello I am using an application with bq34z110 for monitoring 2 batteries. I use a standard microcontroller for communicating with bq through I2C interface. It is not clear for me how to use extended...
View ArticleBQ34Z100 Voltage Calibration on EVM
Dear all,I'm trying to do the "Design Steps" with the EVM board, EVM software and a 10S1P li-Ion battery. At step 3, i set the voltage divider to 42000mV, VOLSEL is set and Number Of Cells is 10. There...
View ArticleCommunicate with bq27621 & bq27441
Hi all,I am facing a big problem in communicate with these chip by I2C protocol (I use F28335 I2C module) . Write or read registers of these chip is really strange. Sometime got right results but...
View Article