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Blown BQ76940
Hi,We are working with the BQ76940 EVM board and the BQ76940 chip on the board just blew. We are fairly confident that it is the LDO that burnt by looking at the image below. When measuring the...
View Articlebq40z50 - how to start
Hi,we will use the bq40z50 for an 2-Cell Li-Ion battery pack in an microcontroller driven device.I've read the thread "Introduction to Multi-Cell Gas Gauges" on top of this forum and some other...
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BQ27510-G2 Where SLEEP+ MODE?
I can't see the [SNOOZE] bit.. it's just Reserved.I using the recently EVSW 9.92 [2013.3.5]Firmware: Version 1.23DataSheet BQ27510-G2 [2010.8 SLUS948] explain about the SNOOZE and SLEEP+.But I can't...
View Articlebq2050h
I want to use bq 2050h for battery capacity indication, I have successfully used it with led as given in datasheet. Now I want to interface it with some controller and I need help in doing this. How...
View ArticleAdvice on circuit for 4 li-ion cells mounted in series without charging function
Hello everyone,I'm designing a system which shall be powered with batteries.I intended to use 4 individual li-ion cells (18650) placed in a holder. There is no charging function as the user will use an...
View ArticleUsing SLA battery with bq40z50 + bq24725A
Hi,We have designed the follow Li-Ion battery solution:-Charger: bq24725A + uController;-Battery Gas Gauge: bq40z50.It worked quite well, but now we have to change the battery from Li-Ion do sealed...
View ArticleBQ7718xx
Dear SirIf I would like to use 2 series of 18650 battery in my product and our end-customer can change each of 18650 battery by themselvesBut about protect solution / Voltage Balance / Reverse battery...
View Articlebq20z95
We are using the bq20z95 chipset on a system. During initial builds of the systems, the chipsets were programmed with lifetime data updates turned on, and the boards were tested to ensure alarms and...
View ArticleDFI MISS-WRITE OF BQ27510-G2
Hi~Our customer use BQ27510-G2.Our customer did mis-write bq27520_3_02.dfi instead of bq27510_1_23.dfi.So, Our customer can't I2C interface to device.Our customer want method default setting reset by...
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Optimization cycle in BQ34Z110 ; VOK flag not set
Hi all,We are using BQ34Z110 fuel gauge in one of our designs to operate with a 12V 7AH lead acid battery. We have completed the configuration,calibration part & now want to run a optimization...
View ArticleProduction programming bq27541-v200
I found the bq Multi-Station Tester Software and source code v2.29 on another post in this forum.It looks pretty close to what I need (except for a different serial number scheme), but doesn't seem to...
View ArticleQuestion about reading instantaneous discharge current with gas gauge devices
Hello!I am interested in using one of your fuel management ICs (especially, e.g. bq27530) in a new project. I would like to have the normal fuel gauging functions provided.However, I am interested in...
View ArticleBQ3055 data flash access
Hi, I am having trouble accessing the data flash. Datasheet says it can be accessed by writing the row offset to 'manufacture access' and reading the entire row of 32 bytes from 'manufacture input'....
View ArticleBQ27530 InstantaneousCurrent() vs. AverageCurrent()
The TRM for the BQ27530 shows InstantaneousCurrent and AverageCurrent read values. However, both of them show an update rate of 1 second - is this correct?
View ArticleBq34z100 Control and Block commands
Hi ,I wanted to know about how control command and its subsequent 2byte sub commands retrieve data.We are considering a code to send command 1 byte at a time to fetch the data.So if suppose i want to...
View Articlebq769x0 GND position
On the bq76940 EVM, GND is wired directly to the bottom cell. Thus, the internal battery circuitry consumption is not monitored through the sense resistor.Can GND connection be shifted between the...
View ArticleProblem with learning cycle of bq27000
Hi,We have a problem with needing too many learning cycles for new batteries using the bq27000.It seems that one learning cycle is not enough for our battery (capacity 830mAhr).After a learning cycle...
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BQ34Z100 4 LED configuration ( 2 LED not lighting up )
I am configuring the BQ34Z100 to 2-in series cell ( LiFePo4 ) and is intending to use 4 LED and a tact switch. The schematics .I managed to link the fuel gauge to my EV2300 . And also able to get the...
View Articlebq77910A vs bq77PL900 vs bq76930 - 10 cell LI ION cordless tool battery pack
For a 10 cell cordless power tool battery pack, which of these part numbers would be best? Or would there be another ideal component?The difference I see is that the bq76930 is only the analog front...
View ArticleCFET vs ALERT for BQ28Z560-R1
Dear Sir.What is the key difference between JFET and ALERT for BQ28Z560-R1?GPIO can be configured as a alert pin when the fault event occurred. Can I think CFET mode is H/W configuration and ALERT mode...
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