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BQ25713B: Powering the BQ25713
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BQ27421-G1: SOC Reporting Incorrectly as 100%
Part Number:BQ27421-G1
I'm using the BQ27421-G1B in a design that is currently shipping, and we are occasionally seeing some strange SoC reporting upon initial power-on by the user.
At the factory, our battery is connected to our PCB, our user firmware is flashed onto our MCU, and then the MCU configures the fuel gauge with our battery characteristics (BATTERY_DESIGN_CAPACITY, etc.). The device is then shut down for shipping, and the fuel gauge remains in SLEEP mode until the end user receives the product and powers it on.
In at least one instance, we saw that the fuel gauge reported StateOfCharge as 100% upon initial power-on, despite the fact that our battery ships at 70~75%. During this time, the reported battery voltage was 4.05V (out of 4.35V) and temperature was about 29 C. At the same time, FullAvailableCapacity was 532 mAh and NominalAvailableCapacity was 406 mAh - which to me means that StateOfCharge should have been 406/532 => 76% or so. After ~6 hours of reporting 99~100%, during which current draw was <<1mA, state of charge dropped abruptly to 74% and started behaving properly after that.
Any idea why the fuel gauge may have reported SoC as 100% for so long, despite the fact that both the battery voltage and the NominalAvailableCapacity reading indicated a much lower value?
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BQ34Z100: BQ34Z100-G1
Part Number:BQ34Z100
Is there an easy way to convert from .gg image file from bqEVSW (Version 0.9.90) to .gg.csv or .srec image file used by bqStudio?
We have updated from BQ34Z100 to BQ34Z100-G1 and the old bqEVSW program doesn't recognize the new device and the new bqStudio doesn't recognize the old device or its golden image file.
Our production line is down until we can get the new bqStudio running. Any help will be appreciated.
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TPS2372-4EVM-006: D7 Details
Part Number:TPS2372-4EVM-006
Team,
What specs do you have for D7 used in the EVM? The BOM in the User's Guide doesn't seem to have any information.
Thanks.
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TPS51220A: Load transient failed
Part Number:TPS51220A
Hi Team,
While doing 100Hz load transient from zero load to full load, the 12V output voltage drop to 8.4V. Could you please help to check the schematic and see where should be modified, thank you.
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BQ40Z50-R1: Cell thermal fuse open
Part Number:BQ40Z50-R1
Hi,
We have an application use bq40z50R1 and once a while we notice one of thermal fuse in the cell (3 cells in parallel) always open. (The first connected cell) For this application; we solder 3 cells on the PCB before we programming the bq chip.
Another application we have; we actually program bq first then solder the batteries and I never see any single thermal fuse tripped at the few thousand builds.
My question is what exactly sequence is correct? Programming then soldering the cells or doesn’t matter.
Sidney
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LM5143-Q1: Configurable 1, 2, 4 phase design
Part Number:LM5143-Q1
Hi Support team
I am working on a design for my customer that is a bit unique.They want a configurable output with constant power, from a 48v DC input, The outputs either 24v at 2.5A or 12v at 5A or 6v at 10A. I think I can do this with a multi phase controller and use the same output inductors and same output caps by changing the switching frequency with a multi phase controller. So for example if i run the switcher at say 1MHz for a 24v output, one phase only, or at 500kHz 2phases for the 12v output, or 4 phases at 250KHz for the 5 volt output.
Is this possible with the LM5143?Or is there another device you would recommend?
Regards
Jeff Coletti
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LM3409: Design leds
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LM53603: Switcher Input Voltage range on Eval Board
Part Number:LM53603
Hi,
We are working with the TPS2549Q1EVM eval board (USB Charge Port). The design uses the LM53603AQPWPRQ1 Switching power supply. The schematic indicates an input voltage range of 7V-18V. That switcher has an input range of 3.5V-36V.
Our application needs the wider range, why is the TPS2549 eval board design limited to 18V?
Thank you
Rich
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BQ40Z80: BQ40Z80 last firmware version
Part Number:BQ40Z80
Hi.
My customer testing with bq40z80 evm.
They using BQstudio V1.3.86.3 and 4800_0_04-bq40z80.bqz.
BQstudio connected BQ40Z80, it is OK.
But when they try chemistry update, error is occurred after "Program selected chemistry"
Refer to below image.
I think BQ40Z80's FW version(V0.02) is not match bqz version(V0.04).
Can you provide last firmware of BQ40Z80?
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TPS568215: PGOOD threshold min/max value
Part Number:TPS568215
Hello,
I have a question about PGOOD threshold value.
My customer wants to know min and max value of PGOOD threshold.
On datasheet, there is only typical value.
Could you tell me?
Thanks and best regards,
Ryo Akashi
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BQ78350-R1: How to set the design capacity?
Part Number:BQ78350-R1
Hi:
I have made a BMS with BQ78350+BQ76940+12Cells.
In fact, there are two battery groups and each group is made up of 6 cells.
The data showed on the label of the group is listed as below:
6 Cells
22.2V
222.0Wh
10000mAh
Now, the question is how to change the design capacity in bqStudio?
How to change the Design Capacity cWh?
How to change the Design Voltage?
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UCC28740: Switching stop at during startup
Part Number:UCC28740
Hi all,
https://e2e.ti.com/support/power-management/f/196/t/792304
I added a question in this thread. Please answer this thread somebody.
Regards,
ACGUY
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TPS53681: TI Vcore 450A solution
Part Number:TPS53681
Hi Sir,
Our Customer product is Xilinx VU9P platform FPGA card, next will change to VU13P Current up to 450A,
They are evaluating IR XDPE132G5C 16 Phase solution, Does TI have 12phase or similar IR 16Phase solution can be share to me?
Hugo
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External parts of TPS61196
We have questions about TPS61196.
Question 1. Capactior of REF pin.
In datasheet p.1 Simplified Schematic,
Capacitor of REF pin is 2.2µF.
But Capacitor of REF pin is 0.33µF in EVM User's guide.
Please tell us the reason why value of capacitance are different.
Question 2.
Please tell us the purpose of C4 in datasheet p.1 Simplified Schematic.
We can't find this capacitor in the Functional Block Diagram datasheet p.11.
Question 3.
Please tell us the reason why R5 is added in datasheet p.1 Simplified Schematic.
Best regards,
Takahiro Nishizawa
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TPS546C20A: TPS546C20 Two Phase mode
Part Number:TPS546C20A
TPS546C20 Two Phase mode:
1,Can you work in a hardware-only way without PMBUS?
2,Since the PM_BUS feature is not used, protection functions such as OCP/OVP/UVP are implemented on external lines. Please also confirm what is the default OCP/OVP/UVP protection point within the IC and how to adjust it to avoid conflict with the protection point on the external line?
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BQPRODUCTION: BQPRODUCTION with Windows 10 Is this Works ?
Part Number:BQPRODUCTION
Hi
Thank you very much many help us.
I have one question for BQPRODUCTION .
We thinking use BQPRODUCTION for mass production with BQ40Z50R2.
Yes , we know EV2300 use for this BQPRODUCTION and we got Windows 10 64bit Driver.
But BQPRODUCTION document request for Windows 7 , we have very simple question .
Can possible use BQPRODUCTION with Windows 10 condition ??
* EV2300 already work at Windows 10 .
Thanks and Regard
March Jasper ( Japan Disty Sugimoto )
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TPS23751: PMP11254 Schematic
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Software Problems of BQ76930 Evaluation Board
Hello, I bought the BQ76930 evaluation board and matching EV2400. I encountered some problems when using it. In the middle of these high and low position instructions, it is said that it can manually set high and low position. But when we connected the battery to the experiment, after a low position, it quickly refreshed its original high position, unable to achieve manual positioning. Then we put a battery off some electricity, and he should be balanced, but the software still didn't respond, and he didn't help us balance. So this software can only read but not write?
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TPS1H100-Q1: /ST status
Part Number:TPS1H100-Q1
Hi all
Would you mind if we ask TPS1H100-Q1?
Table1 shows the operation of /ST signal.
</ST operation in case of TPS1H100-Q1>
No load : Low
With load : High
Short to GND(Current limit) : Low
In case of load, /ST operation was High. Is it correct operation?
</ST operation in case of TPS4HXXX-Q1 or TPS2HXXX-Q1>
No load : High
With load : High
Short to GND(Current limit) : Low
Is it correct operation?
We could not find these description on the datasheet.
Kind regards
Hirotaka Matsumoto
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