Part Number:BQ40Z50-R2
1.GPCRA0 and learning cycle both affect the Qmax and Ra table. right? but have a different instruction guide, which one should i use. thanks
GPCRA0---------，sluubc9--------Simple Guide to GPC Golden GG Maker Tool
learing cycle ------------slua597_------------Achieving The Successful Learning Cycle
2.GPCRB --- this tool optimized Rb,,, but i can't find this param in dataflash ,only find Ra table ,,why? --- i use bq40z50R2 .
Part Number:BQ27750
Hello TI team,
I plan to use the BQ27750 for a battery monitoring of the 18650, and now I have some puzzles about the schematic.
[ Question ]
1. I integrated the TPS61072 5V boost chip and BQ27750 on a single board. Is the BAT_PWR (PACK+ in BQ27750 IC ) of the schematicas the input of the TPS61072 IC or the VCC_BAT(Cell BAT+) as the input of the TPS61072 IC? The schematic is as follows, which design is more reasonable, or you have better suggestions.
2. If VCC_BAT is the input to the TPS61072 IC, what should I do with PACK+PACK- in the BQ27750 schematic?
3. 
If it is convenient, please help check if the schematic has any deficiencies.
Thank you in advance.
Ting
Part Number:BQ27426
Hi, I've searched BQ27426 TRM but can't understand the parameters meaning.
Do we have more detailed document to tell what below parameters mean and how to set them? The gauge is used along with BQ24259.
Dsg current threshold
Chg current threshold
Quit current
Design capacity
design energy
terminate voltage
taper rate
taper voltage
Part Number:BQ78350
Hi for all,
I would have a question regarding on HostFET Control mode.
We turn on the DSG MOSFET(via SMBUS), it will be on immediatly. But if we turn on the MOSFET, we can not turn off immediatly the MOSFET. We have to wait 4sec to go in off state.
Could you please clarify for me why? Is this time predefined?!
Thank you in advance!
Best regards
Adam
Part Number:BQ78350
Hello,
The AFE_OVRD and SS are toggling as show in the video:
(Please visit the site to view this video)
Why this is happening?
The description in the reference guide is too short and not clear:
AFE_OVRD:
The device can detect an external override signal sent to the companion bq769x0 AFE that can cause
permanent failure of the battery. This new option provides a temporary fault detection that acts on the
FETs. The permanent failure option is not affected by this change.
SS (Bit 11): SAFETY mode status
1 = Active
0 = Inactive
Regards,
Part Number:BQ27742-G1
How can the BQ27742 deal with SMPL Sudden Momentary Power Loss? if the battery is removed for 0.1msec; how the BQ27742 deals with this? Would the discharge FET comes on again to power up the system assuming the charger is not connected?
Part Number:BQ40Z50-R1
Hi,
for certain reasons i need to write a small application to program the srec-File to a bq40z50r1 with a EVM2400. Its due to a fully automated production-tool (calibrating etc.).
Does anybody know, where to get this SDK?
Thanks in advance
Sigi
Part Number:BQ40Z60
First, let me comment on the linked thread. I get similar behavior when programming new bq40z60 boards as is described in this closed thread from 2017.
I find that bqStudio (v1.3.54.1) hangs whenever the firmware version on the chip is different than the firmware selected by bqStudio. For me, this happens when I:
1) Attach a new board to EV2300 after having bqStudio running with a different board running newer firmware. It doesn't seem to be able to cope with the change and hangs. I have to kill it from task manager and restart.
2) When I program a golden srec into a new chip. The new srec includes changes the firmware to 4600_0_15. Since the chips appear to be pre-programmed with 4600_0_13 firmware, the firmware change also hangs bqStudio.
Question:
Do all bq40z60 chips come with 4600_0_13 fimrware?
Is 4600_0_15 the most up-to-date firmware?
What does the "Execute after programming" button do in firmware upgrading? Do we have to Execute? O can we just power cycle after programming?
Thank you,
Ryan
Part Number:BQ27441-G1
Hello TI community, I'm new to this forum but I've been using TI's products for a while, first I want to describe you what I'm doing before getting into problem details. I designed a PCB containing mainly a BLE Soc, BQ27441-G1 IC and other components, one of my application requirements is to read once per second Battery State of Charge (%) and observe it using a Mobile App (e.g., BLE sniffer). However, I've been having some troubles with it.
What Have I done?
Firstly, I read BQ27441-G1 datasheet and Technical reference manual in order to understand initialization and data acquisition process. Then, before designing my own C library, I included Sparkfun C++ library for BQ27441-G1 IC into my project, I compared what the library does with the technical reference manual initialization seudo code (i.e., setting a new Design Capacity). I've configured other parameters apart from Design capacity such as: Terminate voltage and Taper voltage, but didn't change the outcome.
Which Battery Do I use?
I'm using a Li-Polymer battery with the following characteristics:
Capacity: 500mAh.
Voltage: 3,7V.
What are my results?
Design Capacity is configured successfully but State of Charge value varies between 1 to 2% (even though Battery is fully charge), Battery voltage says 3345 mV when is fully charge and in open circuit but it says 3241 mV when battery is sourcing the PCB, but I'm not sure this value is correct due to Multimeter readings say Battery voltage is actually 4000mV instead of 3241mV.
Questions and doubts:
Thank you very much for your time, I'll be waiting for your answer
Part Number:BQ27542-G1
Hi team,
I got the same question from my customer.
Which is correct the reference manual or BQ Studio?
Regards,
Ogasawara
Part Number:BQ34110
Dear,
I want to use BQ34110 in the NiMH battery gauge calculation, but I don't know what is the work flow of using this parts. I have following questions want to know:
1) How to test the data of the battery to get accurate modeling of the battery, what equipment do I need?
2) when get the data, how to convert the data to the message of registers setting of BQ34110?
3) is there any document to help debug the issue of BQ34110?
Thanks.
Part Number:BQ34Z100
Hi Team,
Currently I have to design a battery operated device where battery features are 7.4V , 10AH battery capacity with number of cells =6.
As I went through the datasheet of BQ34Z100 fuel gauge there is no description on number of cells ,can this IC used along with my battery with 6 cells, Please suggest?
Regards,
Karthik
Part Number:BQ27510-G2
first I was able to read SOC registers. then I unclip the battery from board and then again clipped it to board.. now it is showing 0 only for all registers
Part Number:BQ27510-G2
I am getting values in State of charge registers. How to convert them in percentage value...
Part Number:BQ40Z60
Hi,
Here i ask about my issue in charging. My device doesn't do charging (the current meter doesn't show the charging current) although already plugged adapter, toggled CHG_FET, toggled CHARGER_EN. My questions are :
- Which register should i define for charging current ?
- Should i toggle DSG_FET too for charging ?
I use 3S configuration.
Kindly please answer my questions.
Part Number:BQ27421-G1
Hello Sirs,
Would you pls help to reply how BQ27421 enter hibernate mode ? TKS !
Attach file is test code .(Please visit the site to view this file)
==========================================================================================================================
Refer to bq27421 Technical Reference Documentation Section [2.4.6 HIBERNATE Mode], the steps to make the chip enter hibernation mode are as followed:
l Power on
l SET_CFGUPDATE()
l Set Hibernate V = 5000 mV
l Set FH Setting 0 = 0
l Set FH Setting 1 = 1
l Set FH Setting 2 = 0
l Set FH Setting 3 = 0
l SOFT_RESET()
After that, the chip should enter hibernation mode when the voltage is less than 5000mv.
So we test it with the code in attached file.
Then we met the issue. There are two signs to make us infer that it did not enter hibernation mode but was in sleep mode:
1. In the specification, the supply current of hibernation is about 9ua higher than shutdown, but we found that the actual test chip supply current is about 21ua higher than that in shutdown mode, which is just like the current in sleep mode.
2. In the sleep and wait_hibernate state, the chip will update data every 20 seconds, which will cause the supply current value rise in the jump, and it happened.
In order to eliminate the possibility that the configuration error or conditions do not match, we did a few tests to reread the configuration.
The configuration is actually written correctly, and some status values are as follows:
Averagecurrent () 0x1 (mostly less than 1ma) Voltage () 0xe39 CONTROL_STATUS () 0x5e Flags () 0 0x18e |
So, pls help us to check:
Part Number:BQ34Z100EVM
Tool/software:TINA-TI or Spice Models
Dear TI,
I have bought an ev2300 and bq34z100evm. my computer can connect to ev2300, but ev2300 can not connect to bq34z100evm.
there are two Communication ports in bq34z100evm, i2c and HDQ,I have tried both of them. Buy the way, I have also detected the voltage of i2c and HDQ with a multimeter,there is not any signal in i2c,but get some signal in HDQ. I wonder how to connect to bq34z100evm,please.
Part Number:BQ27750
Hello there,
we are using the BQ27750 to monitor 2 cells in a 2p-configuration. Each cell has 200mAh, so 400mAh in total. I've attached the datasheet of the cells.
At first we've had some issues with determining the ChemID and running a successful learning cycle. Eventually I could determine a ChemID using the GPC tool and bqStudio though. The ChemID recommended by TI (the one with the smallest error) was 3608. Since the 3608 is labelled as 'obsolete' in bqStudio, we selected the one with the second smallest error, 2155. This one has a max. error of 2.67%.
Now that we've set this ChemID and configured the most important current and voltage thresholds, the Learning Cycle also seems to run as it should (it is still ongoing).
But now I've come across something that might be a big problem for us in the future application of the BQ27750:
I have started the Learning Cycle using the BQ27750EVM and I've set the current thresholds (taper current, charge/discharge current threshold, quit current) to convenient values that allow me to finish the Learning Cycle. That is: Taper current = 11mA, Currentcharge/discharge current threshold = 8mA, quit current = 4mA. I also tried to stick to the rule that the taper current should be larger than the discharge current threshold which should be larger than the quit current:
"Charge termination taper current > charge and dishcharge current threshold > quit current"
The currents we expect in our application are much smaller though. The estimated discharge current goes as low as 2 or even 1mA. So if I set the discharge current threshold to 1mA (which is already sketchy), I have no chance to set a reasonable quit current.
So in the end I've got two big questions:
- How should I set the current thresholds and can we expect accurate long-term behavior by the BQ27750 in this configuration? If not, which kind of errors do we have to expect, regarding SoC, SoH etc.?
- Is the BQ27750 even suitable for this configuration with currents this low? Or would to suggest any other IC? Is there any workaround we can implement to make this work?
Thank you very much for your help.
Kind regards,
Benjamin
Part Number:BQ34Z100
Hello
after negative experience with bq34110 trying impedance track guage bq34z100, recently purchased eval board and power it up according to quidck strat manual.
unfortunatelly, following instructins I am not able to update chemistry for 0434
do somebody knows what is wrong? Config: EV2400 + BQ34Z100EVM
Thanks a lot
later, TRIED BQ GAS GUAGE eval SW from ti page and I was able to update required chemistry file:
