EV2300 I2C Vout turn on
I can talk to a bq34z100 using the EV2300 with no problem as long as the I2C lines are pulled up from the battery. I am trying to program the device using pullups from the Vout line on the EV2300,...
View ArticleBQ78350 AOLD protection not working
Hi,We have a custom board on which we are using the BQ78350 with the BQ76940 to monitor and protect 15 cells. To avoid causing damage, we simulate the cells by connecting an external power supply...
View ArticleBQ40z50-R1 Accuracy
HiOur battery manufacturer is preparing a datasheet for our pack and they would like to know the following accuracies:COV Threshold Accuracy (mV)COV Recovery Accuracy (mV)CUV Threshold Accuracy (mV)CUV...
View Articlebq40z60 Chem ID needed
Hi,The Chem ID that was recommended previously (0x1268) did not provide good gauging so I collected data with a new pack (log file attached). The online GPC tool did not generate a report, so I am...
View ArticleCan bq40z60 operat as standalone charger after be programmed?
Hi, Tom,By default bq40z60's CHG FET and DSG FET are off. Can them be set on during manufacturing (like CHGR_EN bit) in the Manufacturing Status Init of Data Flash? In this way bq40z60 can act like a...
View ArticleCustomer is insisting that we write update status = 0x06 in our bq20z45...
"TI has made the following recommendation for update to the .senc file ...:On the xxx senc file, Update Status is shown as 02. For production, as a minimum, Update Status should be 06. Please make this...
View Articlebq78PL116 sequence
Hi Folks,For bq78PL116 am I right to say that:(1) Inputs to LDO1 and LDO2 are (V2-Vss) and (V4-V2) respectively? Because of that V2 got to “on” first (to activate LDO1) before V1 then follow by V4...
View ArticleCan I use BQ34Z100-G1 IC for lead acid battery 12V, 250Ah? Is there any way...
Can I use BQ34Z100-G1 IC for lead acid battery 12V, 250Ah? Is there any way to reduce current scaling and we can use this IC?
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BQ27510-G3 Checksum issue while changing the battery capacity
Hi,I fail to update the design capacity to 1800 (0x0708), can you ensure my step is correct? I done a read after i write new capacity and it report 0x07 0x08, which means my capacity changed...
View ArticleSpecial Commands to read information from BQ78350 Companion Chip ?
Dear Members, I am trying to use the BQ7694000 and BQ78350 companion chip with dsPIC33EP512MU810. I am using dsPIC33E to talk to the companion chip over SMBus. What i am planning to do is to...
View Articlebq34z100-g1 flash access
Hi,In the document (SLUSBZ5, p21) of the gauge, an example is given to access "Terminate Voltage". In the data flash summary table the name is "Cell Terminate Voltage" and not "Terminate Voltage" and...
View ArticleApplication of bq27441-g1 with 3.X Linux kernel
Hello!I have a device with bq27441-1g IC. My device is Freescale i.MX6q-based which works with Linux 3.10.53 kernel. I am trying to add bq27441 driver into kernel.I found bq27xxx-related menuentry in...
View Articlebq40z60 SoH, Charging current
I'm developing a Li-ion battery management solution in custom design. Everything works, except two things:SoH: Somehow the State of Health is 45% always, with new batteries, with dead ones, after weeks...
View ArticleBQ27542 State of Charge
I am working on a project using the BQ27542 Battery Gas Gauge paired with a BQ24296 Charge Controller and a user-replacable NCR18650B Li-ion MH12210 battery. I have evaluation modules for both the...
View ArticleSetting Design capacity using I2C programming doesn't change it
Dear Forum, I am using a BQ27441 G1B, fuel gauge on the EVM. I also have a EV2400 interface adapter, but for our purposes we need to operate the board programmatically. So I have connected it to a...
View ArticleBQ34Z100-G1 - chemical ID selection process
Hi Thomas,We are using bq34z100-G1 fuel gauge in our design. The battery that we are using does not have chem id in the list given by TI. So as suggested, we started to log the charging and discharging...
View ArticleSetting IPSCALE in SpecificationInfo() using the bqStudio.
Hello all,I am making a BMS using bq78350I need to measure currents of up to 100A, I read I can set IPSCALE to 0x01 in SpecificationInfo command to achieve that.1. I use bqStudio - where do I find...
View Articlebq34z100-g1 Flash access
Hi,In the documentation SLUSBZ5, p23, the following paragraph is not clear :"When in SEALED mode or when “0x01” BlockDataControl() does not contain “0x00”, data flash is no longeravailable in the...
View ArticleUsing community linux driver to program the BQ27441 Fuel Gauge
Dear Forum, I found two drivers, one specifically for BQ27441 (https://android.googlesource.com/kernel/tegra/+/b445e5296764d18861a6450f6851f25b9ca59dee/drivers/power/bq27441_battery.c ) and other a...
View ArticleBQ27541-G1 - state of charge smoothing
Hello,We are using the BQ27541-G1. I wanted to see if there is some more detail about the state of charge smoothing? It doesn't really say how SOC is changed, how fast, etc. in the datasheet. “When...
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