Bq27541-g1 holding SCL low indefinitely
We are seeing the following issue. When the battery voltage is brought below ~3.0 volts, the bq27541-g1 holds the I2C clock line low perpetually. It does not recover from that condition unless the...
View ArticleAbout the 1-wire communication product of fuel gauge IC
Hello all, Are there product that can communicate at 1-wire with the host in the fuel gauge IC that can indicate 2 cells? We have proposed a BQ40Z50 to customers. But BQ40Z50 isn't 1-wire...
View ArticlePlease advise RE: Block Write Capabilities of bq2060 - Probably not allowed
Thank you for past support.I am communicating with the bq2060(a) with my own custom firmware. Things are going well, using an I2C port driver to communicate.The bq2060 data sheet indicates that this...
View ArticleCell balancing
Hi,I am currently working with the BQ78350 and the BQ76920 to manage a 3-cell Li-Po battery. We are still in the process of understanding all the feature and intricacies of the devices.My question...
View ArticleBQ34Z100-G1 ChemID change
Hello,I am working with a standard SLA battery and want to change the Chem ID on the fuel gauge to an 0x080x version from the default 0x0107 set in the fuel gauge.I am looking for some more information...
View Articlebq76930EVM after purchasing an evaluation board, please help eupnida a very...
Hi Tom,It was glad.I have a problem of purchasing an evaluation board and test the BQ7830EVMQuestions to dream.Set the PROTECTION 2 (0X07) in the I2C and BQ76930 to 0XFFE-10A were then flown to a 10A...
View Articlebq34z100 JEITA compliance and Management Data Register (ChargeVoltage &...
For JEITA Compliance setting (T1,T2,T3,T4 ) of bq34z100, i set the JEITA to be :My gg'sFile Setting :JEITA T1 = 0 (C)JEITA T2 = 10 (C)JEITA T3 = 45 (C)JEITA T4 = 55 (C)When Battery Pack is Operating...
View ArticleSealed bq20z45R1, bqEVSW and extended SMB Registers
Hi Everyone,I want to verify in production a pack is actually sealed. The most straight-forward method would be to read the FAS and SS bits from the Operation Status register. But, I get NACK's when I...
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bq78350 ASCD, AOLD, OCD timing
Hello,I am hoping to get some clarification on the various short circuit and over-current timing mechanisms on the bq78350 + bq769x0 battery management system.We're relying on the short-circuit...
View Articlebq78350 BAT pin
Hello,If BAT pin measurements are disabled (DA Configuration [ExtAveEn] is clear), will the CEDV algorithm function? Will it use voltages from the AFE?Thanks,Jason
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bq20z75 Partial Flash memory erased issue
Here is a very urgent and strange issue for our bq20z75. Customer using the bq20z75 for a UPS. At first , that all things goes well for almost testing. However, today they found that the gauge reports...
View ArticleBQ27510 - usage
Hi,I am trying to use BQ27510 chip to control my single cell Li-ion battery. To be honest I am a bit lost now because of what I have read.1. I have chip connected through I2C to omap and I can...
View Articlebq40z60EVM battery always 100 %
Hi,I want to build a BMS for 3 LiFePO4 batteries (A123 1100 mAh, ID 0404).I’m using a bq40z60EVM-578, EV2300 and bqStudio (1.3.35).Charging and discharging works fine (auto stop if a cell reach a...
View ArticleBQ34Z100 cycle count algorithm clarifications
Good morning,I'm currently facing with another difficulty while using the BQ34Z100. I have to use the cycle count information provided by the BQ34Z100 and so I have to properly set the CC Threshold...
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BQ27621 integrated with IMX6 solo lite in Android
Hi,I am trying to integrate the BQ27621 with IMX6 Solo Lite in android platform.I get the driver for BQ27621 from below link:And i added the driver and compile it .When i ON the board and it works But...
View ArticleBQ34Z100-G1 - Full Charge Capacity Error, Temperature/SoH Anomalies
Setup:1. Target hardware used for testing has a BQ34Z100-G1 gas gauge and a BQ24725A charger. 2. The battery used is a 3S2P 4400 mAh Li-Ion pack built with LG ICR18650 S3 2200 mAh cells. 3. A West...
View Articlebq27510-G1 underestimating battery capacity
Team,I had a question regarding the BQ27510-G1 Fuel Gauge. We have recently had a fuel gauge greatly underestimate battery capacity. This was observed in an event where the fuel gauge made a large...
View ArticleI2C com to bq27425
I have read and reread the bq27425 spec. Unfortunately, I still do not understand what byte values I send to command() the chip. I tried to specify the I2C pattern for some of the bq27425 commands,...
View ArticleCommunication between two or more BQ34Z100
Hi,If I have 2 batteries and I have one BQ34Z100 for each and monitor each, how will I facilitate communication between the two boards and if I want to display the voltage of each battery separately on...
View ArticleBQ40Z50 standalone mode
Hi all!I try make charger circuit based on ltc4100 (custom board, 100% Compliant (Rev. 1.1) SMBus Support Allows for Operation with or without Host) and bq40z50 (bq40z50evm board, Supports Two-Wire...
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