BQ27200 EEPROM needed or not
Hi all,it is a topic that was discussed here before but not cristal clear and it is pretty crucial for design.We plan to go into mass production with this chip and our designed PCB containing it.we...
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BQ77908 High Altitude Balloon Mission - Recovery from Single Event Upset
I will be flying a BQ77908 battery pack on a high altitude balloon mission where a single event upset may latch up the device. Where is the best place to put a MOSFET switch in order to cycle the...
View ArticleHow to unseal BQ20z75?
Hi there,I tried to perform a Permanent Fail Clear(PFkey) with command 0x62, 1st word 0x2673, 2nd word 0x1712.But the chip is sealed. I read through the unseal section and security section, but it's...
View Articlebq34z110EVM Design Steps procedure. Optimization Cycle problem.
Hello,I'm using the bq34z110.The battery is 24V, 12Ah Lead-Acid (12 cells).The chip correctly read the voltage and current of the pack. The number of series cells is programmed to 12.When I try to...
View Articlebq20z45-R1 reading parameter Min and Max value
Please tell me the Min and Max value of the following reading parameters.-Temperature-Voltage-Current-Cell Voltage[1:4]In the datasheet, each parameter register has Min and Max value.ex) Voltage: Min...
View ArticleBQ20Z75DBTR-V160 I2C latch-up
We are working on a Battery Management system which its battery pack is installed with BQ20Z75BTR-V160 gas gauge. The communication lines (i.e. SMBD and SMBC bus) circuitry is as per page 15...
View ArticleDoes BQ20z65-R1 PRES pin have an internal pull up resistor?
In the BQ20z65-R1, the /PRES pin is an active low signal and can be left floating when not used. This suggests there is an internal pull up, but I cannot find any reference to one in the datasheet or...
View Articlebq34z100 Current Calibration
Hi!What is the process to calibrate the current for the 34z100? I am writing a custom program to perform that function. I can perform the cal with the EV2300/bqEVSW, but I can't find the basic...
View ArticleBQ27510 Learning Cycle Problem
Currently I am having mainly 2 issues regarding bq27510-g2 learning cycles. 1. Chemistry Learning Cycle: I ran chemistry learning cycle with one battery three times. And all three times it...
View ArticleOpen Cell fault after assembly
Dear all,I have received my PCB with schematic that was discussed here in the Forum.RE: BQ77910, FET oscillatesI have a repeating issue.I have a series FET connection method (discharge and charge FET...
View ArticleMulti-Battery LiPo Monitoring and Charging
Hi,I have a complex smart battery system to design. Before I start a more thorough evaluation I wanted to make sure I had covered all the bases that need covering. I can upload copies of the various...
View ArticleBQ27541-v200 Internal Temperature Sensor
Hi there,We're using the BQ27541-v200 fuel gauge in our battery pack with an external thermistor populated as well.(a) Without any calibration (i.e. the internal & external offset values are "0"),...
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Grounding BQ34Z100
Hi!We are designing schematics with BQ34Z100 and have the following question:Could the BQ34Z100 ground be connected to PACK- instead of BAT- as drawn on Figure 7.bq34z100EVM-001 Schematic?Possible...
View Articlebq34z100 VEN input high level threshold
I think high level input is needed to VEN pin for detection of push button ON.So, I want to know the high level threshold. Please let me know that information.And I have one more question.In datasheet...
View ArticleBQ3050 Behaviour&Settings
Hello,We are currently designing an electronic board with a 4S1P Li-Ion battery pack and use a BQ3050 battery gauge. After many tests, we have tuned the gauge parameters (according to the file...
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BqGaugeStudio and BqCONFIG not worked with EV2300??
Dear Sir,I need to review status table of gauge IC bq27425-G2A and I had a problem when working with EV2300 tool (PCB : HPA002 rev B).I downloaded 3 application tools from website page for product...
View ArticlePR1010 Gerbers
Hi BMS Team,Can you please provide Gerbers for the PR1010 Battery Emulator board?Thanks,
View Articlebq34z100 some basic getting started questions
Hello, We are looking at using the bq34z100 fuel gauge in a high-capacity 16s design. I have some basic questions to clarify some issues with regards to configuring the flash, and working with the...
View ArticleBQ3060 Current and Temperature Calibration
Hi,I'm working on an automated BQ3060 data flash programmer and calibrator for use in manufacturing. The only documentation I have found on calibration is SLUA502. In this document, the example...
View ArticleBattery Insertion / Battery detect in BQ27425-G2
Hello,I have some doubts regarding how does the battery detection in the BQ27425-G2 work. We are designing a system powered always by a battery that will never be removed, so we will always have the...
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