BQ27421 average current
I'm having an issue measuring average current with the BQ27421 gas gauge IC. It will sometimes give the correct value (8-10mA for my system), but for long stretches it will output 0mA, which is...
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bq40z50-R1 Enter Emergency Shutdown Through MFC
Does the codes 0x207C 0x043D are right in TRM? I can't shutdown the gauge through MFC within 4s.Alternately, sending a Manual FET Control (MFC) sequence using the steps below also puts the gauge tothe...
View ArticleBQ34Z100-G1 voltage and current measurement error/offset
Hello,I'm using the BQ34Z100-G1 EVM together with my 7S2P battery pack, and I have gone thorugh all the steps of voltage, current and temperature calibration and right now I'm running the optimasation...
View ArticleProblem with BQ34Z100-G1 Learning cycle
We make tests on BQ34Z100-G1EVM with NiMH pack and we have problem in learning cycle. The pack is in RELAX for 50 hours and the OCVTAKEN flag is not set. So, we can’t finish the learning cycle. Can you...
View Articlebq34z100-g1 Lifetime Data: Lifetime Min/Max Pack Voltage
Hi,i'm not sure whether i understand the meaning of Lifetime Min/Max Pack Voltage correctly and what are useful values to start with for our application.We are using the YUASA NP7-12 Lead Acid...
View ArticleBQ34Z100-G1 calibration Issue
We have some questions on the calibration of BQ34Z100-G1. 1. We found that the CC offset value cannot go to zero after calibration complete.Does this current from BQ34z100-G1 must be exactly ‘0’...
View ArticleBQ34Z100 G1 P1, P2 Pin HW Design
Hi,In our design we use HW SN74HC164 (as reference design) for LED control, wherein P1 and P2 is connected to the IC input A, B, and CLK. Since we use the HW mainly with I2C, we have not assembled the...
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BQ78350-R1 DSG and CHG lines closed (XDSG, XCHG are on) all the time
Hi all,I have connected the BQ76940EVM to a battery pack.my XDSG and XCHG flags a permanently on.I programmed the default firmware of BQ78350-R1, and defined all "Data Memory" parameters.I send FET_EN...
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bqStudio export error
Hello,I'm trying to export my data registers for backup and I'm getting the error shown in attached image.Please assist.
View ArticleHDQ wakeup hibernate mode failed issue still exist in bq27542-G1
As title,for bq27541, it can not communicate with device under hibernate in hdq mode. is this still exist in bq27542?
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[bq34z100-g1] can't be calibrated to "zero current"
We have problem to do the calibration to bq34z100-g1. After we calibrate the Board offset and CC offset to the bq34 (by Battery Management Studio), the report value of current ISN’T “zero”, but a tiny...
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BQ40Z60 Design. Voltage drop on ACP
Hello!I am creating a 2S1P design with BQ40Z60 close to the reference EMV-Design.However, i experience voltage drops from ~12V to 8.6V on the ACP-Pin (usingBQStudio for reading this value), when the...
View ArticleBq34z100 learning cycle, MaxError is always 0%
Hi.I have started the learning cycle for bq34z100 exactly according to the SLUA334B document after configuration according to section 9.2.2.1 Step-by-Step Design Procedure from bq34z100-g1 document...
View ArticleBQ27426 - not getting 100% at SOC
Hi,The main issue is that I'm not getting 100% SOC with the BQ27426. It's stopping at 99% and not rising further.My settings are the following:Battery is 110 mAh lithium ion battery.Gauge modified...
View Articlebq34z100 reading manufacturer info block A
Hi,I'm trying to read the manufacturer info block from a bq34z100 gas gauge. The gas gauge is connected via i2c to a NXP LPC1768 micro controller.Unfortunately reading the data isn't possible in a...
View ArticlebqEV2300 and bqEV2400
Hello,I need to re-install bqEV2300 (Needed for bq30Z55) and bqEV2400 (Needed for bq 40z50-R1) to work with Windows 10.Please let me know where is the best place to download and install the above...
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ADC Sampling time for bq40z50 in normal mode
According to bq40z50-R1 TRM, the device takes voltage, current, and temperature readings every 250 ms. I am trying to measure TS1 pin to check the behavior. The result is shown as attachment. Based on...
View ArticleBQ40z50-r1
Hello there,I have a problem with the temperature calibration of the BQ40z50-R1“Calibration – Calculated external sensor two temperature correction is out of range” ( Sometimes the error also shows as...
View ArticleBattery gauge bq40z50-R1 design question
We are designing a new product and want to integrate a Li-Ion battery ( 2 cells in series) with battery gauge. The product will have one mother board with power circuits and several other circuits for...
View Articlebq34z100-G1 ALERT signal pins
Table 21 of the datasheet has a column called "Config Register Hex Code".Based on the LED mode used, a value is given. In my case, I'm using Mode 3 with the 10-LED Expander with I2C.In bqStudio, in...
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