Forum Post: RE: BQ34Z100 ROM mode and I2C timing documentation
I am not aware of anything on the device that would cause that waveform. I can look at it on the bench, if you wan to send a pack to TI.
View ArticleForum Post: RE: bq40z50 unresponsive
A-ha! So both pages in the 40z50 TRM are incorrect!Thanks Tom!
View ArticleForum Post: bq500211A EVM Image
Hey guys, I work for the NexFET team and was putting together a presentation of EVMS TI's NexFETs are on. This will include the BQ50021A EVM. I wanted to include a picture of the board but I couldn't...
View ArticleForum Post: Calibrating bq34z100PWR for a 5 cell series battery
I am having a hard time calibrating a 5 cell series battery. The battery is 185Whrs, 10Ahrs.I can enter 10Ahrs in the design capacity in the data flash but cannot enter 185Whrs.I am attaching the .gg...
View ArticleForum Post: RE: battery chargecontroller BQ24450
Please read the data sheet and use the application circuit as a reference.
View ArticleForum Post: RE: bq76PL536A High cell count string
Hi Douglas,To answer your questions:1. No. Each IC is referenced to the bottom of the lowest cell it is connected to.2. BAT1 and BAT2 of each IC will be attached to the top of highest cell (5) it is...
View ArticleForum Post: RE: bq20z65 communication errors
Hello Onyx,I have observed that the communication dropouts are infrequent with low or no current (every 10s or so), but are very frequent with charge current. I see both NACK and T2H (clocking)...
View ArticleForum Post: RE: bq25570 Issue
The block diagram is not accurate. If VBAT_OK is not needed, you will need to ground both OK_PROG and OK_HYST in order to prevent overshoot.
View ArticleForum Post: RE: BQ24753A design
Hello Syed,I would suggest looking at something in the BQ247xx family.Once you have narrowed down the device you are interested in using the datasheet will typically have layout and design...
View ArticleClik here to view.
Forum Post: RE: BQ24272, is there any issue with the I2C interface?
Hello,I tested a BQ24272 EVM during charging and monitored the SCL and SDA lines with the scope. For my testing I shortened the watchdog reset to once a second to try to catch any issues that might be...
View ArticleForum Post: RE: How do I set the chemistry ID in bq3050?
You usually do not have to update the ChemID unless you are using a non Li-Ion chemistry. e.g. LiFePO4 If you want to change it, the you can usually access the device using one of the Impedance Track...
View ArticleForum Post: RE: BQ24251 question
Thanks for your responce jeff..But, why it is stated that no battery condition is valid in Datasheet.is it something related to BC1.2 specification?since, bq24251 incorporates NEW! Dead Battery...
View ArticleForum Post: Problem calibrating the bq27425-g2: fails on checksum verification
Hello,I am trying to calibrate my bq27425-g2 (connected through i2c line to my controller) using the attached file.It seems there is a problem with the time it takes to write the data to the chip.I...
View ArticleForum Post: RE: BQ24272, is there any issue with the I2C interface?
Thank you for your time Ryan!I change the capacitor of BYPASS PIN (pin 23) to 1uF from 0.1uF that a had in the first place. The datasheet recommend 0.1uF minimum capacitance. The things are better now....
View ArticleForum Post: RE: bq2084 more than 15Ah
Dear Tom,where did you find the maximum capacity of 65000mAh?I only found the maximum range of 65535..!??After a few cycles with more than 15000mAh everything is fine at the moment.Thanks!Norbert
View ArticleForum Post: RE: Problem in reading capacity
There are no plans to obsolete bq27541-G1 or any of our gauges. However, if you want to look at something newer then the bq27742-G1 is the very latest single-cell pack-side gauge and it integrates the...
View ArticleForum Post: RE: bq24250 VIN_DPM in SA mode
In our implementation the BQ24250 is in SA mode with EN1=1, EN2=0. This allows both input current limit and VDPM to be externally programmable with resistors. I selected a resistor for ICL but chose to...
View ArticleClik here to view.
Forum Post: BQ24278 charger output oscillating on battery insertion
Charger is "oscillating" on/off at ~4kHz (along with another longer period and repetitive event) when battery is inserted while external power present (this only happens with Vin between 5.1 and 5.3V)....
View ArticleClik here to view.
Forum Post: RE: About BQ24292I PMID connect Capacity
Hello Jasper,The capacitance on the PMID pin also serves as additional input capacitance for the the switch mode converter.Since the PMID pin is closer to the half bridge used to charge the battery...
View ArticleForum Post: RE: Calibrating bq34z100PWR for a 5 cell series battery
The text in the bqEVSW does not change, but the device will recognize it internally.
View Article