bq40z50 Overcharge Trip
While trying to run a learning cycle, I got an OverCharge trip, which turned off the Chg FET and halted the charging (gotta turn off Protections for learning cycles!).What I don't understand is why:...
View ArticleAdvanced bqMTester (HPA495 Advanced MTester Calibration Board)
Full Disclosure: I am not the (an) engineer in charge of this project, but have been tasked with improving our production calibration process.We are currently using the BQEasy Evaluation software for...
View ArticleBQ34z100-G1 TS pin
HiCan i check with you if my customer design does not have a thermistor, what should he do with the TS pin?Ivan
View ArticleBQ40Z60 USB 5V Charging
Hi,I try to program the evaluation board "bq40z60EVM" to be able to charge a 2s1p pack with 5V (500mA).It looks like the standard setup performes charging if Charge Voltage > pack Voltage.Which...
View ArticleProblems with BQ77PL900
Describe experience with this chip.Initially, the project - Car control and protect the battery cells 40.Initially tried to use it in standalone mode. As a result, the lower limit was too low for...
View ArticleBQ27411-G1, read values not possible to interpret
Hello everybody, i make a selfdesigned prototype with BQ27411-G1 for the LiPOone cell gauge. The µC that communicate with BQ27411-G1 over I2C is Atmega1284P. I try to read the all data(Temperature,...
View ArticleLooking for data on communicating with BQ9000
I'm constructing a battery tester for qualifying smart batteries in various handheld devices. So far I've had success in communicating with a variety of TI Gas Gauge chips in iPads, iPhones, Surface,...
View ArticleTemperature sensing for multiple cells
Hello all,I am in the process of designing a 4s1p battery pack where the cells are required to be thermally isolated from each other to prevent thermal runaway in any one cell from causing a cascade...
View ArticleBQ27531-G1 with BQ2429x chargers
I am using the BQ24296 with an ST fuel gauge in the design. ST appears to be leaving the fuel gauge market. So I get to redesign... Will the BQ27531-G1 work with the BQ2429x series as they are...
View ArticleFuel Gauging High-Rate Pulse Loads
Greetings.We have a new application with the following load profile: 25A (approx. 13C-rate) for 30ms followed by 12.5A for 970ms, rest for few minutes, repeat at least 100 times before recharge.Will...
View ArticleCan't able to read Manufacturer info in bq40z50
Hi,I am trying to read the manufacturer info by using SBS command value of 0x23 via i2c communication in BQ40Z50. But for that command i am receiving only chunk character as "0xFF". Anyone tell the...
View ArticleBQStudio Manual Control Panel Operation - BQ27742
Is there a guide to using the "Manual Control Panel" in BQStudio?We would like to understand how to "Enter Cmd" , set the Delay and Access StyleFor instance, how would one use the Manual Control Panel...
View ArticleP/N bq2060 false charge
Hi,I am using the bq2060 gas gauge ic to interface with 4 lithium cell batteries. lately i have been receiving failed batteries from the field. the failure mode is when the system reads the battery...
View ArticleIf you run BQ78350 BQSBB of test data The changing gender issues,
There is a problem of the test evaluation board BQ76940EVM I have a question.BQ76940 Evaluation Software as a data variable and then set the value of the electronic load When the load discharge the...
View Articlecode of BQ34Z100 communication with I2C
u8 ReadData(u8 command) { u8 temp=0; IIC_Start(); IIC_Send_Byte(0xaa); IIC_Wait_Ack(); IIC_Send_Byte(command); SDA_OUT(); IIC_SCL=0; IIC_SDA=1; Delay_us(100); IIC_Start(); IIC_Send_Byte(0xab);...
View ArticleBQ2084-V143 Data Overflow/Underflow ERROR
Hi,I'm working with a BQ2084-V143 and a BQ29312A and it works. I read all the Datas over SMBUS but I have an BATTERY STATUS ERROR todayIt makes 1 week I don't touch the battery pack and the charge is...
View ArticleEffective Current in bq27621
Hi TI,I have the question about Effective Current calculations in the bq27621 fuel gauge. I have the standard 4.2V Li-pol battery with 40 mAh capacity. I configured the gauge capacity and energy with...
View Articlebq40z50 min capacity
Hi,I have used the bq20z65 for 2 years but I cannot use it anymore as my project is getting bigger and now the capacity would be over 200Ah.I cannot use the bq20z65 cause the max programable capacity...
View Articlebq27421-G1A shows 100% SOC before the charging completes
Hi all,In my project i am using bq27421-G1A Fuel Gauge for Li-Polymer Battery measurement.I have configure fuel gauge battery parameters are:- Design Capacity = 108 mAhDesign Energy = 3.7 X 108 =...
View ArticleHDQ Mode for bq27742
Hello,We are using the bq27742 in HDQ mode. We are using a custom programming tool to program and calibrate our PCBAs (no TI tools). What is the sequence of commands to put the gauge into HDQ mode. Is...
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