BQ78350 KEYIN maximum input voltage?
The datasheet for BQ78350 is unclear regarding the maximum safe input voltage for KEYIN.We are getting field failures of devices and suspect the KEYIN pin fails (and sources voltage) (some are short...
View ArticleFailed Read Data with (Decimal Code) Error 772
I am currently trying to do a Battery Learning cycle using bq27520 EVM. I have successfully passed it before and now I am doing it on a different battery. But something has gone wrong during the...
View ArticleProgramming BQ27542 with df.fs file
I'm working on a design using the BQ27542 lithium-ion fuel gauge, and have created a golden file for my application. However, when I try to use Battery Management Studio to program the BQ27542 from...
View ArticleDoes the current calibration can be perform at 3.5 Amp instead of 2 Amps?
HI I'm currently performing a charge current test to a battery pack at 3.5 Amps and noticed a lot of variation between the DMM and fuel gage.Noticed that the error at 2 Amps is 11 mA but when I rised...
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Problems with SoC%, BQ3060
Hello. I have a problem that SOC% is not correct. When I discharge the battery it shows SoC 0% at 13V. Before the discharge I have written 30 in CEDV register. As shown in picture below. Is this value...
View ArticleLiMnO2 Fuel Gauge
I need a fuel gauge for 2 primary CR123A cells (LiMnO). I noticed previous posts about the bq34z100 (bq34z100-g1) which are over 2 years old. Any updates? Does TI have any App Notes about monitoring...
View ArticleBQ34Z110 vs. BQ34Z100-G1, Qmax, relaxation, etc. - request for AE call.
Greetings!We have a product developed over the last couple of years with the BQ34Z110 that's finally nearing roll-out after a long field trial. It looks like the '110 is no longer recommended for new...
View ArticleBattery Management Studio 1.3.45 hangs when switching to advance view of...
Subject says it all.That does not occur with release 1.3.42It happens on two computers. It is very repeatableResource monitor shows no wait chain problem.bqsbb.exe process uses 0% CPU time.Both...
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Runtime BQ78350-R1 register corruption/conflict (and documentation mismatch)
We have Cell Temperature Model Coeff A1 at 0x454F becoming corrupted on a B78350-R1.As a matter of fact, our software writes the Electronics Load register at 0x454E.Although the range is 0-255, the...
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bq27421-G1 current limit on integrated sense resistor
Hi team,If the current flowing through the integrated sense resistor on the bq27421-G1 is around 3A, is it possible to place a parallel resistor in the circuit so that there is not so much current...
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BQ20z90+BQ29330 chipset incorrect work after learning cycle
Dear sirs, good day!I have a problem with my LION controller based on the BQ20z90+BQ29330 chipset. After learning cycle and after all the steps described in SLUA421A doc BQ20x90 turns off both FETs:...
View ArticleBQ27510-G3 : learning cycle fails when discharging. Ra tables not updated
I am trying to create a golden image for the BQ27510-G3 gas gauge. I have determined the correct chemistry type for my battery and use this (1116) when running bqeasy in the bqEVSW application. I have...
View ArticleBQ40Z60 EVM
Hi Tom,I have a few questions related to the EVM and our design.1. What exactly does D2 do? The note on the schematic says to replace it with a 10ohm resistor when using 1S pack. We are using a 2S...
View ArticleBQ27510-G3 CheckSum problem
Dear,I'm using BQ27510-G3 and it is soldered on my PCB. It communicates with MCU over I2C. I've tested I2C communication with my scope, and it seems to be OK. I have a problem when I want to update...
View ArticleBQ27510-G3 Standard Command Write
Dear,I have a doubt about unsealing the BQ27510-G3. I want to write 0x0414 by using control commands. What is the right I2C sequence:Start 0xAA 0x00 0x00 0x00 Stop Delay66uS Start 0xAA 0x00...
View ArticleExtracting the dvi file
Hi,Can someone tell me how to extract and store the dfi file for personal backup from the bq27520 EVM?I do not have the gg file and used the existing flash image when starting the learning cycle. Can...
View Articlebq 40z60 EVM.
Hi Sir ,We have bq40z60 evm board, we are try to make golden image for 3S1P battery pack,Kindly share how to create golden image and learning cycle , calibration using bq40z60 or how to use bq40z60...
View ArticleBQ27621-G1 for Vanadium Pentoxide Lithium Coin Batteries
Hi,Can BQ27621-G1 be used for Vanadium Pentoxide Lithium Coin batteries? If not, what other solutions do I have? I actually prefer small products (like BQ27621-G1). Here is some examples of Vanadium...
View Articlebq 33100 5 Caps Balancing doesn´t work
I use the bq33100 EVM to charge and balance some capacitors (5 Caps with each 25F ;2,7V).My Power Supply (System Voltage): 15VChg Voltage / Current: 12400mV / 100mAThe voltages of the supercaps have a...
View ArticleBQ3060 Cell Balancing through pulsing FETS?
Hey Battery Fuel Gauge Team,A client of mine is utilizing the cell balancing feature of the BQ3060 set up with the external balancing circuit of P-channel MOSFETs, with 39 ohm 1W resistors. (~90mA of...
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