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Forum Post: RE: Question about the V_drop out in BO24203
Hi,I just looked into the datasheet and to my amazement I noticed the same thing:I guess, a TI representative sheds some light on this issue!Regards,Gautam
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Forum Post: [BQ24168] No return to normat from battery fault status
Hello~Connect the AC adapter to system, and then when testing the experiment for remove & mount of the battery (several timesfor short periods of time), sometimes charger status does not return to...
View ArticleForum Post: RE: BQ2000 Frequency Operation Calc
II believe your issue on changing the frequency is that you are using the ZXCT1009 current sense IC on the high side, which we do not use.The output impedance of this device is different than the 0.1...
View ArticleForum Post: RE: BQ34Z100 - Capacity goes to zero with no load after a day or two
Hi Tom,I still haven't got the failure to happen with the logger running, I'll run it for a few more days.One thing that we might be doing wrong is Impedance Tracking is not enabled. According to the...
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Forum Post: BQ77910a stacking - upper BQ shows Short Circuit Charge flag...
Dear All,We designing big project for some company and we need help with our design.We have two BQ77910a stacked with series fet configuration. Schematics are based on design note: The Basic Circuits...
View ArticleForum Post: Not able to change the qmax cell 0 value in bq34z1xx
I am trying to update the initial value of the Qmax cell 0. but the value is not getting loaded and the i get NACK for the checksum data. i am sensing it because of the automatic q max value update. Is...
View ArticleForum Post: RE: BQ33100 Schematic Design
Hi Gang,1. The design is pretty much straight forward. As can be seen in the data sheet, the schematic is for a 5 series cap.2. if you look at the recommended voltages on page 4 of the data sheet, the...
View ArticleForum Post: RE: BQ2057 - Battery Charging While in Circuit
There is internal leakage through the IC SNS line. We recommend placing an isolation diode or FET on the Battery side of the pass element.
View ArticleForum Post: RE: BQ24161B SDA/SCL Pull-Up Voltages
We have used the bq2416x parts will I2C lines pulled up as high as 3.3V without incident.
View ArticleForum Post: RE: BQ20Z75 high current consumption issue
Hi Onyx,Thanks for your quick reply. I will check on my circuit and get back to you if there is any issue on current consumption of the board. I would like to know how do i identify whether it has gone...
View ArticleForum Post: RE: BQ34Z100 Host System Calibration
Shirley,We do not have a document published with calibration code examples for the bq34z100, but the process flow should be that same as that shown in the SLUA640 document. The read and write command...
View ArticleForum Post: RE: BQ34Z100 Write with standard command
Shirley,Data must be read in blocks, modified and written back into the device in blocks. Have you tried the process flow example shown on page 11 of SLUA665?RegardsTom
View ArticleForum Post: RE: BQ77910A recovery from OC (Over Current) and SCD (Short...
I know the frustration. As you indicate the currents will be the same for series or parallel configuration. With series configuration the transients will feed into the part not only through the cells...
View ArticleForum Post: RE: update firmware at production
Hi Tom, Noted. Thanks for your quick reply.Best regards,Shirley
View ArticleForum Post: RE: Gas gauge selection
Thanks for your care and suggestions GauthamWe will try to do the sameRegards,Naveen K
View ArticleForum Post: RE: Not able to change the qmax cell 0 value in bq34z1xx
Are you seeing the NACK's while using the EV2400 or your uC? I have verified that these parameters can be changed using the EV2400. If you are seeing NACK's while using this interface, then your device...
View ArticleForum Post: RE: BQ34Z100 - Capacity goes to zero with no load after a day or two
ShaneWe do not set IT to enabled as a default in the golden file, because the device should be calibrated, etc. before IT takes control of the pack. Sending the IT Enable is well documented in our pack...
View ArticleForum Post: RE: BQ77PL900 Circuit Suddenly Not Working
I would not expect the conformal coat to cause a problem.If multiple (all?) boards are having the same apparent undervoltage, I'm sure you have checked the obvious cell count configuraiton.The IC is...
View ArticleForum Post: RE: BQ34Z100 Write with standard command
Hi Tom,I see, my steps are wrong.I haven't tried with it yet, will read the flow again and try with it later. May I know what are the commands that I shall send to read the Alert register in order to...
View ArticleForum Post: RE: BQ77910A recovery from OC (Over Current) and SCD (Short...
Dear WM5295,I had a small change of approach,I have a gas gauge on the circuit that is connected to B+ through a tactical switch.basically I connected B+ through the tactical switch to CHGST. as I...
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