Smart Battery Charger reading simulated battery
I am implementing a Smart Battery Charger reading data from the SMBus in order to charge a bq20Z90/bq29330-equipped battery. In order to test the performance of the charger, I am using a production...
View ArticleBQ20z45-R1 for UPS type application
HiAre there any recommendations for the BQ20z45-R1 data flash configuration to maintain RSOC accuracy if the battery normally only sees shallow discharges of a few %?Or, what is the minimum discharge...
View Articlebq40Z50 calibration
In section 11.2 of the 40z50 TRM, a reference to a "Calibration Application Note" is made.Does this document exist yet? This sounds like an ideal method of calibration in a production environment.
View ArticleBQ27510 always in sealed mode
Hi,I have a problem with a fuel gauge which is always in sealed mode.I have 2 board : A : my electronics card with bq27510 and battery ref BATB : the bq27510 evaluation board with the same batteryI...
View ArticlebqTester for bq34z110
I'm trying to read ROM file from bq34z110 as described in SLUA665 "Going to Production With the bq34z1xx".Unfortunately the "bqTester ROM Imager" from slvc109.zip (bqTester 1.02) doesn't recognize...
View ArticleBQ27541-V200 to G1 firmware update in end product
We have problems with V200 firmware and want to update to G1 (V200 got sudden capacity drops, G1 works fine).Is there any documentation or sample code for OMAP4 how to do the firmware update in end...
View ArticleBQ34Z100 ROM mode and I2C timing documentation
I am looking for real documentation (not just comments in a VB script) for ROM mode. It seems that ROM mode is largely undocumented - although slusau1b.pdf mentions BOOTROM mode, the command to enter...
View ArticleNeed help with DQ protocol to communicate with bq34z950
Hi there,I am writing code to communicate with a bq34z950 using DQ bus. I have read through bq34z950 data sheet about the signaling/timing. I have difficulty to find a complete description of...
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BQ33100 capacitance measurement more than 10 times capacitance
Hi,I used bq33100 EVK board and EV2300 to measure super capacitor stack's capacitance ( 5 pcs 22F/2.7V super capacitors series). In thoery, its capacitance should be 4.4F.But, I got below value: 43.5F...
View ArticleBQ2084 Manufacturer Access write not working
Hello,I am teaching myself on the bq2084 and bq29312. I am using an old hp laptop battery for the learning phase, as I have one and the circuitry is all there.I created a board with an AVR processor to...
View Articlebq40Z50 Overcharge Protection
The Alert for an Overcharge Protection is defined as:RemainingCapacity() ≥ FullChargeCapacity() , AND Internal charge counter > 0Overcharge Threshold is in mAh, but the default is a low value (300)....
View Articlebq40z50 - Application book
Dear all,I plan to use the bq40z50 in a new application. I am familiar with both the bq20z75 and the bq20z45 but bq40z50 is new to me. Therefore I have limited experience setting the DF parameters...
View ArticleBQ76940 does not respond to I2C
Hi TI experts,BQ76940 does not respond to any of the I2C commands. According to the oscilloscope traces, it does not generate ACK signal. (bus is not pulled down in the 9th clock cycle)I have double...
View Articlebq27531 Not updating SOC during Discharge
While bringing up a bq27531 design in MLC mode, the SOC during discharge does not change from 100% until discharge cutoff when it corrects to 0%.When I try the part in MLC w/SoH Comp or CCCV modes it...
View Articlebq27531 SOH is not changing
Hello again,During the past few months of bring up and testing I was reviewing my notes and noticed the SOH parameter hasn't changed since my initial learning cycle. I've been using the batteries down...
View Articlebq27531 - What changes with SoH-compensation?
I am experimenting with the SOH_EN bit and it doesn't seem to have much effect on CCCV or MLC profiles. Is there any App Note describing benefits for using SOH_EN, when it starts to take effect, etc?...
View Articlebq76PL536A Evaluation Module schematic and modifications to change EVM to 3 x...
The data sheet mentions full-size reference design schematics are available on request. Where are these located for the bqPL536A Evaluation Module?Secondly, how can the EVM be modified to configure it...
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bq76pl536A and 105 cells in seires
Hello so happy to have this forum :), please find attach document.We're designing a 105S lifepo4 battery bms, in fact there are two in series *total 210s*, but SPI is going to be separeted.then one...
View Articlebq2084 Permanent Failure Mode exit?
Hello,How do I clear the /SAFE output and PF Flag register, "using a series of ManufacturingAccess() commands" of the bq2084 Gas Gauge (for use with the bq29312 AFE)?Thank you
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BQ27510 Inconsistent Communication
Hello all,I am writing to see if anyone else has had any issues with inconsistent I2C data communication between the EV2300 and fuel gauge?I am seeing on most reads through the evaluation software that...
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