Setting input current for smart charger (bq24747) without host processor.
Hello,I am creating a stand-alone battery pack for a product using the bq20z65 gas gauge and bq24747 smart charger.The customer has requested that the battery pack be chargeable when removed from the...
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Default short circuit on BQ3050
Hello,My problem is the short circuit, because I have try different values in the AFE SC Dsg Cfg register and I don't have different values with an oscilloscope.For example:with 0x77 programmed in AFE...
View ArticleSet bq27541 into HDQ mode
Hi all,We are using the BQ27541 (BQ27541DRZR-V200) fuel gauge device for a battery pack.It's currently set in I2C mode (as per factory default), and we would like to change it toHDQ/single-wire mode. I...
View ArticleUnsealing bq27531
The Sept 2013 TRM SLUUA96 section 5.3 describes how to go to SEALED, UNSEALED and FULL-ACCESS modes.It refers to named addresses "Unseal Key 0", "Unseal Key 1"... but nowhere in the document are the...
View Articlebq27541-G1 lost connection at firmware programming
Hello,we have some defective Battery units with the gas gauge bq27541-G1.The communication over I2C is lost.Is there any way to get an access to the device?Like a bootloader or so.I think there was an...
View Articlebq27421- conditions for Qmax update?
I am cycling a Li-Poly cell with a bq27421 -G1A EVM, and am yet to see QMAX_Up or RES_UP flags set after several charge/discharge and relax cycles.Looking through user guide, I see:"After the initial...
View ArticlebqMTesterS and the .NET environment
My customer is having difficulties with the BQ active X controls, please see below. What can we do to help her?Hi. I am having some problems compiling and running an application using the active x...
View Articlebq MultiStation Tester error report
HiI'm attempting to use the bq MultiStation Tester (version 2.1.4) but i keep getting"Error: Expected -1 boards, Found 0"does anyone know why i get this and how to fix it so i an connect to...
View Articlebq27530 questions
In the bq27530 datasheet there is mention of the bq27530-G1 Technical Reference Manual. Where can I find that document? It looks like the BQ27530EVM comes with a EV2300 interface board, is that...
View Articlebq27421-G1A not reporting 100% SOC after a full charge
Hi,I'm currently working on a project that uses the fuel gauge IC mentioned in the subject for our battery management circuit.The problem that I noticed in our current setup is that every time the...
View ArticleBQ34z110 battery testing methods.
I am using this IC just to test the health of a battery. 1. Is it possible to test the battery, with a generic optimization cycle created using the same kind of battery without any chargers or load?2....
View ArticleBQ34z110 data command for current.
I am trying to find the data command for measuring the actual current, I couldnt find in the data sheet. but it is displayed on the software. whats the command for current?thank you.
View ArticleBQ3050 will not enable charge until SMBus activity
I have a BQ3050 implementation using four Li-Ion cells. I connect the battery pack to a charger and the BQ3050 will not turn on the charge FET. I found that if I connect the EV2300 pod to the pack for...
View ArticleHow do you communicate with multiple batteries that are wired in series over...
How do you communicate with multiple batteries that are wired in series? The problem is that each SMBus ground is at a different voltage, so they cannot be connected together unless the SMBus is...
View ArticleBq20z75-v180 .senc file
1). Where I can find .senc file for the same for software Bq20z75 v1.81.2). I have Bq20z75 v180 IC, but software reads V1.81. What's the difference.3). I have Bq20z75 v160 IC, by programming V180...
View ArticleReg BQ26220 Sleep mode
Hi everyone,I promoted BQ26220 to one of my customer, they are evaluating it. In the EVM software, i set some threshold potential in MODE/WOE regsiters using WOE2,1 & 0 bits. When the value across...
View Articlebq27531 flash file
Is there a document describing how to write the dfi file to the Bq27531 flash?There seems to be a document "Going to production with the bq2754x" and another "Going to production with the bq275xx"...
View Articlebq20z60 sleep and shutdown modes
Hi,I am programming a bq20z60 and after several tests I have seen that for some reason I cannot enter SLEEP and SHUTDOWN modes. I have tried to follow the SLUU386 reference manual but still is not...
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Bq20z75 with wrong .DFI
Dear all,I would appreciate any comments to the following question:At first, Bq20z75 was sealed. I try to unseal it by using the different version .DFI file. After programming Dataflash Image(.DFI...
View ArticleContents of ROM and DFI files
Hello,I am currently evaluating a BQ34Z110 with the EVM board. I have set the data flash parameters up, carried out a calibration and learning cycle. While reading through the 'going to production'...
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