Dear Team,
The customer is using LM5051 and find out it can't block the reverse current successfully.
The customer needs using extra circuit(RC73 and RC7) to cheat the LM5051.
Also, when they test the short circuit on CC62, the reverse current will go to 1000A.
Do you have any ideas what is wrong here?
Besides, the customer is considering the competitor's device, if you want to know the specific device please send me a mail.
BR
Kevin
Part Number:CSD25310Q2
Hi Sir,
Could you please recommend an alternative MOSFET for AP4453GYT-HF for Oring funtion (Vin is 5V)?
I couldn't find a similar spec MOSFET in our website so I'm not sure which should I choose for my customer.
Thank you very much.
Best regards,
Candice
Part Number:BQ27742-G1
Hello,
As i have now golden image files, and i want to add my df.fs file directly into flash memory of fuel gauge via microcontroller (STM32L0), because in my project i am working with this microcontroller. So can you please help me that how can i write df.fs file in flash memory . maybe i can use pragma syntax. But i have never worked with it flash and pragma. so please give me answer that how can i do that. If possible please give me refrence of code as well.
Regards,
Reena Patel
Part Number:LM5067
Hello,
We are using Hot swap controller part# LM5067 in one of our design.
The calculated current passing though mosfet will be 20 amps @ -ve 48V.
I have attached the power calculator sheet in which there is some issue(Cell# F48).
We would like to use the mosfet part#IPB020NE7N3G. Datasheet of the same also has been attached.
Please suggest to rectify the power calculator sheet.
Regards,
Jainendra
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Part Number:BQ78Z100
BQ27750 how to disable zero-volt charging. My customer needs to forbid 0V charging for safety reasons.
And how to disable zero-volt charging?
Someone can help me to solve the problem?
And I setting pre-charge current，pre-charge start voltage, charge voltage low to 0.
But zero-volt charging is working yet.
Part Number:BQ27750
BQ27750 how to disable zero-volt charging. My customer needs to forbid 0V charging for safety reasons.
And how to disable zero-volt charging?
Someone can help me to solve the problem?
And I setting pre-charge current，pre-charge start voltage, charge voltage low to 0.
But zero-volt charging is working yet.
Part Number:TPS56428
Dear Experts,
Condition: Input 12V, output 3.7V, loading 2.5A
We found high side Vds of TPS54628 will be about 18V.
Is TPS54628 high/low Vds rating the same as 20V (22V<10ns)? Could you help checking voltage rating spec of high side Vds?
If answer is yes, 18V is over our 85% derating guideline.Would you think it will be a risk?
Part Number:UCC28881
Hello,
I have the 270Vdc line, and I must make auxillary power supply 15V for logic IC.
I was recommended to use UCC28881 (back converter)
I assembled the scheme in accordance with application from DATA of the component
I applied the recommended calculator to calculate the values of all components.
Cvdd = 100nF
Rfbt = 130k
Rfbb = 10k
Cfb = 800nF (470nF parallel to 330nF)
L = 400uH
Cout = 220uF
Rout = 27k
When you turn on the input voltage 270Vdc, output voltage rises to 15V, but after 150 msec it drops to 5.5V.
What am I doing wrong?
Thanks,
Leonid
Part Number:BQ34110
Hi team,
my customer is using bq34110 as the gauge of UPS battery now. they have a few questions on the application of bq34110. Can you help answer below questions?
1. If the customer only need measure the discharge curve during calibration. Please help check if the steps is correct. charge the battery to full charged status(no data need to record during this procedure)----> left it alone for 3 hours ( record some battery data)-----> discharge the battery to cut-off voltage point and record the data during this procedure-----> left the board alone again and record some data.
2. During the high rate discharge procedure, the temperature of the batteries rise rapidly, the temperature is 25℃ at the starting of discharge and it run up to 45℃ at the end of discharge. Will the temperature difference affect the GPC tools calculation?
3. According to the design of BMS, the battery will be charged with a small current (about 100mA), as the instantaneous discharge current may reach 100A. The current range is very large. And bq34110 is unlikely to detect 100mA current. Will this affect the SOC for Gauge calculation and cause the battery can't be 100% charged? Is there any solution to solve this issue?
Dear TI,
In my design the LiPO is charged using TPS61175. But I cannot find a battery protection IC for LiPO at 7.4V (2 cell) and charged at 2A.
Do TI has any battery protection IC for 7.4V?, I suppose I cannot use any 4.2V protection IC, am I correct?
Can you please direct to correct battery protection IC/
Thank you
Manimaran
Part Number:LM5067
Dear
We're using LM5067-1 (latch-off version) as hot swap controller. And two of power FETs are used in parallel.
The circuit is now starting to mass-product. But in the ON/OFF test, only one of two paralled FETs is sometimes dead. The failure rate is % not PPM.
The on/off test is occured at 3 different input voltages, i.e. minimum, nominal and maximum input voltage.
The nominal dc input voltage is -48Vdc and specially the FET failure are mainly occured at the highest input voltage (-65Vdc).
The output load doesn't seem like being related to this failure.
The FET P/N is below...
1st vendor: IRF100B201 (TO220AB, IR/Infineon)
2nd vendor: FDP036N10A (TO220, Fairchild/ONsemi)
The two FETs are assembled with heat sink.
Another information which you need to consider is that this failure is occured on specific lot of FET. Other FETs which have other manufacuring lot are mostly fine.
So the customer is now exclude the FETs of specific lot and adopting other lots. I think that is just a temporary measure. Sooner or later, this failure will be occured as production increases.
I researched related information and I initially suspects that the root cause may be difference of FET Vt.
I referenced the document which is titled by "Reliability Issues for Hot Swappable Devices"
The document link is ... https://www.eetimes.com/document.asp?doc_id=1273013
But as far as I know, there are no big difference of specications of FET including Vt. So I don't know exactly which is problematic - unbalanced Vt or below/above specific Vt.
Now I'm trying to test Vt of FET by using curve tracer. But there is a little problem to rent a curve tracer. As soon as I get the curve tracer, I'll test and let you know its result.
Anyway, what's your opinion on this failure?
If you need the customer circuit (related to hot swap circuit), pls let me know.
Honestly, I'm third party on this project. There are end-customer (global communication equipment company), intermediate customer, OEM development company, and me!)
In order to share detailed design information in public, the customer permission will be needed.
Thanks
Michael
Part Number:BQ27542-G1
we find that, the SOC shows 0% suddenly, then back to normal SOC value, did you find such issue on this chip?
Part Number:BQ40Z60
Hi,
I use my hardware which is a copycat of the bq40z60 EVM.
In the battery management studio, i notice an odd. When I charge a battery, The dashboard gauge frequently indicates well over 2000mA, while the maximum charge current is confined to 2000mA on the tab Data Memory > Advanced Charge Algorithm as shown in the picture.
Is the dashboard gauge precise? Or does another parameter for the current exist?
Thanks,
J.H.Kim
Part Number:TPS65217
we are designning devices with AM3352 and TPS65217B ,
power rails of Tps65217b can't work normally, we removed all loads( removed R530,R534,R537,R538,R540,R542,R545), VLDO1 can hold 5 seconds without PWR_EN, only holds 50mS with PWR_EN. No output on other rails. following is the schematic of TPS65217B.
Part Number:LMR16030
Dears,
My customer to do the AT&T certification but they reported that we are failing with a strong component at 106.8 MHz.
Could you please check if you see this and what could be done to fix it? Thanks!
Part Number:BQ27411-G1
Hi, TI experts,
I don't find the current calibrate function in bqstudio. How to calibrate current?