bq78350 - FCC is not updated and MaxError=100
Hello,What are the steps to make MaxError be less than 100... I set learning cycle count to 3, still after 3 full cycles MaxError=100 and FCC is not updated.* one thing is the device is in sleep mode...
View ArticleBQ34z653 Configuration Issues
I am working on a design with the BQ34z653 chip and I am having some issues:Firstly, there is software available online for the older BQ34z651 chip but there doesn't seem to be any available for the...
View ArticleBQ40Z60 SYSPRES and LED
Several posts indicate that the BQ40Z60 datasheet pinout for SYSPRES (pin 15) and the ALRET (pin 14) are swapped (SYSPRES should be p14, ALERT should be pin 15, like the EVM.)The question is - are the...
View Articlebq76930 evaluation software: value box flashing red
I may have damaged the bq76930evm in some way and am trying to diagnose the issue. Thus far on the Evaluation Software the system control 1 register value box is flashing red and the numbers will...
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BQ20Z75 RSOC jump
Hi Sir1. Below show one of the BQ20Z75 project test, RC and FCC doesn’t have a big change but Why RSOC jumps? And ASOC has update correct? RSOC= RM x 100/FCC, but Qmax, FCC and RM don't change a lot.2....
View Articlebq34z100EVM schematic source files
We are interested in using bq34z100 in our design. We need schematic source files of bq34z100EVM evaluation board so that we can make fine changes as per our application and impliment in the design.
View Article[VOLTAGE_CONSIST] for bq40z50-R1?
In TRM, page 55[VOLTAGE_CONSIST]: Voltage Consistency Check. This function helps to prevent an RSOC jump. Theflag should be set to 1 as default.But where is the [VOLTAGE_CONSIST] bit in DF? I can't...
View ArticleNegative cell resistance values cause Ra update to fail during learning cycle
Hello everyone!I am using a BQ78Z100 device with 2 550mAh LiPo cells in series. The cells are definitely not charactarized by ti so I did the chemID calculation using the GPC Tool. I got a match with a...
View ArticleBQ34Z100-G1 related to SLUA664
SLUA664 shows many examples of BQ34Z100 Data Flash configuration, and has images of several screen captures, but does not indicate what software is in use with these functions. Is it BQ-Studio, or...
View ArticleBQ34Z100-G1 How is the external LED shift register driven?
Hello, I have 1 specific question on the bq34z100-G1 battery gauge chip – I could not find any detailed information on how the external LED shift register is driven, besides which pin is...
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bq78350-R1 srec read error
Hello.We are using the BQ78350-R1 associated with EV2300 and BQ studio (v1.3.45).We want make srec file from to Device but find the USB Timeout error.What is this problem solutions ?Thanks.
View ArticleBQ34Z100-G1 bad capacity
We make tests on BQ34Z100-G1 with NiMH pack and we have problem of capacity.Yesterday, we make test of 2C discharge and there was a capacity fall. When the BQ34Z100-G1 believe the battery was empty,...
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bq40z60 strange learning cycle behaviour
Hi, I have the bq40z60evm board connected to an EV2400 on a 4-cell Li-Ion pack with CGR18650C batteries. I have set Minimum output Voltage / Voltage Resolution accordingly to bq40z60 Charging Voltage...
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bq34z100EVM giving 2x discharge current when viewed with bqStudio 1.3.52
cannot figure out why this is happening. Description of setup:EVM silkscreen: PWR111 Rev. B bq34z1xxEVMQRcode:1419714754FCHIP stamp: 34Z100 2BKG4 A2TVbq programmed with firmware...
View ArticleDoes BQ34Z100G1 needs to always be energized?
I would like to know if BQ34Z100G1 needs to always be energized. In our application, the system connected to the LiFePO4 battery may stay weeks without the battery being charged again. As a result, if...
View ArticleReserve Battery Capacity and No Load Reserve Capacity for bq40z50-R1
In TRM, page 48No Load Reserve Capacity — The PSNoLoadResCap threshold is programmed to a value in mAh based on how much capacity to reserve for powering the RTC for a period of time after RSOC is...
View ArticleComplete Getting Started Guide for bqStudio and bq40z60
I have a bq40z60 in my circuit. I was been able to get bqStudio connected to my in circuit bq40z60 following the getting started in the EVM documentation. This seems to be where the "Getting Started"...
View ArticleHDQ to i2c converter
Hi,I have a battery designed with HDQ communication. it’s all working great! I want to use two batteries (parallel) in a product that can communicate with I2C only. Is there any way to convert HDQ to...
View Articlebq40z60 Custom PCB - not giving VSYS voltage output
Hi,I'm working on a custom implementation based on the BQ40Z60EVM for power management in a refreshable braille display prototype. The device is being powered by a 3000mAh 3S1P (11.1V) LiPo battery...
View ArticleBQ27425-G2A short circuit capability
Customer asked: I am using the Fuel gauge BQ27425-G2A together with Swing 5300 from Boston Power. I am concerned about inrush current and short circuit capability of the current sensor in...
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