Forum Post: RE: bq24250 VIN_DPM in SA mode
You have to write to one of the charger's I2C registers in order to enter HOST mode.Is the voltage at the charger IC's IN pin 4.7V or is that the voltage at the power source? There could be a voltage...
View ArticleForum Post: RE: bq34z110 update status
Hi Tom,I performed the "Chemistry ID Selection" steps and attached the log. Could you run it through your MathCad Tool and let me know if you have a match?Thanks,George
View ArticleForum Post: RE: Solar powered NiMh charger for 4 cells
Yes, a slow charge from the solar cells and a fast charge from an adapter would work.Adapter voltage (1.75V to 2V per cell plus 1 to 2V over head) of 8V should be ok.Remember to have at least C/3...
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Forum Post: BQ24297; query on USB host detection
Hi,We are planning to use USB charger BQ24297 in a new design based on OMAP4460 and we have the following queries on the battery charger design architecture:BQ24297 is capable of detecting the charger...
View ArticleForum Post: RE: bq24650 / without vias on the thermal pad
We do not have any data to support operation without vias in the power pad and since this is a quad QFN the only cooling is through the vias down into another plane.
View ArticleForum Post: RE: May I reset during bq34z110 optimization cycle?
Resets and parameter changes will cause the optimization cycle to abort and it will heave to be restarted. The device sets DOD points and collects charge data during this process that these actions...
View ArticleForum Post: RE: BQ34z110 programming
Error code 772 means NACK. Can you provide an oscilloscope picture of the SCL and SDA signals when you are initiating communications?
View ArticleForum Post: RE: Determining Chemistry ID for lead Acid Pack
Dear TomThank you very much for the information ,this is really helpfull,much appreciated Regards Peter
View ArticleForum Post: RE: BQ24278EVM not charging at rate set by R_ISET
If not connected to a battery's NTC, you can simulate the NTC with on board potentiometer. Keeping the voltage on TS at 1/2 of the DRV voltage (~2.5V) ensures charging.
View ArticleForum Post: RE: bq20z45 controlling the SMB-charger bq24707A or bq24725A.....
Tom,Thanks so much for your support. I did not manage to find anything about that topic in the documentation I have so I rather asked the Forum and you. Thanks again.Best regardsKjell
View ArticleForum Post: RE: bq24250 VIN_DPM in SA mode
Yes, that was my first instinct. But, as I lower the input voltage from 5V, the current draw from the source goes to zero around 4.7V.I plan to query the register to see where the VDPM is set, and to...
View ArticleForum Post: How to get CHEM-ID and DFI with BQ27531??
Now I am using Bq27531 and Bq24192 chipset to control the battery in my project, duing the development, I have some questions :1, How can I get CHEM-ID use the Bq27531 EVSW?? There is no BYEASY button...
View ArticleForum Post: RE: bq20z75 Problem Setting Cell Chemistry
I requested a custom senc file that was preset with our chemistry, cell count and gg file. That solved the problems.
View ArticleForum Post: RE: BQ27200 EEPROM programming
Dear Javo,more info:you can force the true ILMD value (your case ~3000mAh) , with EEPROM overwrite, and that will make it easier for the bq to identify end of discharge.also, if you set the taper...
View ArticleForum Post: RE: bq24086 stability and dropout voltage with remote battery
Hello Jeremy,I had another thought. What about placing an NPN BJT on the low side of the battery between the charger minus and battery minus.Tie the base to battery + through a resistor. Emitter to...
View ArticleForum Post: RE: BQ33100. connect more than 5 ultracapacitors
Thanks.I have others questionsi need to connect 5 ultracapacitors in serie of 3000 F.Is it possible to connect supercapacitors of this capacity (3000f) in the BQ33100EVM-001?.What is the range of...
View ArticleForum Post: RE: Battery charger for 1.5V (20mAh) battery
Hi Ryan,No problem. I will share more details about the battery once I get it. Thank you. Regards,Mahesh
View ArticleForum Post: RE: BQ24040 temperature threshold charging not entering disabled...
I used my evaluation board that just came in the mail and found the issue I was having:My assumption was that the CHG pin would go HIGH indicating that the battery charger wasn't charging the battery...
View ArticleForum Post: bq34z100 pin2 Ven weirdness
So after running an initial lot of a battery with bq34z100 fuel gauge I have one piece that is displaying some weirdness, I have 0V on pin 2 Ven, checking dataflash its showing a battlow, and measuring...
View ArticleForum Post: RE: Switching regulator causing radio sensitivity degradation
Thank you for help.CE is tied to ground.When battery is plugged in and load current is small, it is fine.When I increase the load current, I can see current jumping up and down on power supply current...
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