Part Number:TPS23521
hello
My Customer Request the Reference Design for -48V, 1.6KW.
What should I do when Retry Behavior status?
Load Condition : -48V, 7A
Used TPS23521EVM-001.
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TPS23521: Request the Reference Design for -48V, 1.6KW
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TPS54618: Can I use another voltage rail on EN pin for power sequencing?
Part Number:TPS54618
Dear expert,
Can I use another voltage rail on EN pin for power sequencing? I want to enable TPS54618 once another 1.8V rail is ready. I use an RC circuit for EN pin like below.
However, I notice that EN pin has an internal pull up current source, which may finally cause 1.9uA reverse current into my 1.8V rail. Will this be a problem? Maybe I can only use open drain output to EN pin?
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TPS3895: TPS3895ADRYT binary datecode
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TPS54332: can TPS54332 maintain a stable +5V output within a input voltage range from 6.75V to 10.8V (maximum load current)?
Part Number:TPS54332
I am going to use TPS54332 in my design, my product will be powered by a battery, the nominal voltage of battery is 10.8V, the cut off voltage of battery is about 6.75V, so the input voltage range of TPS54332 is from 6.75V to 10.8V, the output voltage of TPS54332 will be +5V, my question is: can TPS54332 maintain a stable +5V voltage output within this input voltage range with maximum load current?
Thanks and best regards
Kelvin
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BQ2970: BQ29700 Vocc range spec
Part Number:BQ2970
hi
what is the range of Vocc?
According to Datasheet,
i find that Vocc range is from -10mV to 10mV when TA=25°C (page 6)
But in table 2 on page 20, Charge Overcurrent detection (OCC) voltage = -70mV.
Could you help to expain it?
Thanks a lot!
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TPS2121: TPS2121 VQFN-HW cad drawing / model
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UCC28780: Competition is ONsemi
Part Number:UCC28780
Hello E2E,
Our customer choised the NCP1568 of ONsemi for next new design. We compared the performance of competing products with UCC 28780.
Competitor is very strong. I think TI will not beat the competitor. Does TI release even better products?
Regards,
ACGUY
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LM73606: Switching Node Fluctuation (falling edge)
Part Number:LM73606
Hi team,
I'm an FAE supporting some industrial customers in Japan.
Please let me ask you about LM73606EVM.
Switching node of LM73606 was fluctuated when falling as shown in below.
Is this normal operation for this device?
Operating condition:
Input Voltage: 15V
Output Voltage: 5V
Discrete component parameter: default
Iout: Upper is 6A, Lower is 0.1A in below image. Both of them are constant current
I'm looking forward to hearing back from you.
Best regards,
Shota Mago
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BQ34110: if the BQ34110 can automatically distinguish the different capacity batteries with the same chemical and if the BQ34110 can automatically distinguish the batteries with the different chemical
Part Number:BQ34110
Hi ALL：
Q1:
I want to know if the BQ34110 can distinguish the different capacity batteries with the same chemical. for example, I have some NICAD batteries on my hand,but the batteries have different cell nums and so have different capacity.when the system power on if the bq34110 can go on a Self-learning . by the Self-learning, the BQ34110 can get the battery cell nums and to distinguish the different battery.finnaly I need to write differnt parameters to bq34110 dataflash
Q2:
I want to know if the BQ34110 can distinguish the batteries with the different chemical. for example, I have some NICAD batteries and LiFePO4 batteries hand.when the system power on if the bq34110 can go on a Self-learning . by the Self-learning , the BQ34110 can distinguish the NICAD batteries and the LiFePO4 batteries. finnaly I need to write different parameters to bq34110 dataflash.
I want to use the unified software to manager the different Specification battery！
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LM34904: The /Pok pin, doesn't get high with expected volatges on overcurrent or when Enable signal is low.
Part Number:LM34904
Need to know proper value of pull up resistor that needs to be connected with Pok, to get its level at least 3.3V.
Presently with a pull up resistor of 10 k and VCC 5V, signal goes as high as 1.88V, with 5k, goes upto 2.5V on reducing the pull up resistor to 5k, and 2.6V on reducing value of pull up to 1k.
Is this behaviour of IC acceptable?
As /Pok is an Open drain pin, so what voltage levels can be connected, to pull-up.
Regards,
Puneet
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TPS40200-HT: SS pin resistor
Part Number:TPS40200-HT
Hi,
1M ohm register is connected on reference circuit as below.
Why is this register located?
What is a risk if there is not this resistor?
Best Regards,
Kuramochi
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BQ24715: Watchdog suspend issue
Part Number:BQ24715
Hello
Customer testing EC FW with PCB which has BQ24715 inside.
They find the charge is suspended since watch dog timer is enabled(default: 175sec).
After disable watch dog timer by setting reg 0x12 to 0x065E, the charge is still suspended automatically.
Supposedly we don't need to write charge volt/current to keep charging after disable watch dog timer, right?
BR
Patrick
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TPS65916： SMPSX_SW has no output voltage
Part Number:TPS65916
Dear all,
The original output voltages are all normal.
When I connect the SMPSX_FDBK to the inductor and connect to SMPSX_SW, the LDO output voltage becomes 0, and other voltages will be wrong.
LDO_IN is 3.3V.
Is there any reason why I ignored it?
thanks,
Dan
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TPS61372: Boost for Audio AMP
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Detect the power detection of electrical switches and send to Wireless Analog and digital converter
I am looking for the IC packages which will help me to test the power status of around 32 electrical switches with some threshold setup and will send the signal one by one to wireless analog to digital converter.
Any circuit sample for testing or IC package to make this solution work with Single wireless converter will be a great help.
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BQ27Z561: Fuel Gauge Selection Query
Part Number:BQ27Z561
1. Do TI has dedicated Linux based software to support the IC for battery calibration?
2. Any specific process to follow for charge-discharge cycle calibration as per the battery capacity?
3. Do we get final INI file (golden file) with given IC and the battery to support (4.2V operating voltage)?
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UCC28950: Question about Overcurrent protection on short-circuit test condition
Part Number:UCC28950
When tested the short-circuit condition for UCC28950, output FET were broken.
I think that overcurrent protection could not response because inlush current is too fast on short-circuit test condition.
Please let me know about two points below for measure the overcurrent protection and short-circuit test condition;
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①Is there countermeasure for FET broken by external component?
I think that small Css become fast response for overcurrent protection, is this good idea?
If there the other idea, please let me know.
②Is there any document for short-circuit test on UCC28950(or UCC28951)?
⇒For example, application note, reference design, design guideline, etc.
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Customer condition is below;
・Input： 750V
・Output： 140V/10A
・fsw： 100kHz
・Configured overcurrent protection threshold： 16.5A
・Inlush current on short-circuit test： About 50A
・Four output FET are also broken
・FET： IPW90R340C3（Infineon）
・FET Driver： UCC27528
・Switching voltage is clean (no problem for high overshoot and overvoltage)
Best regards,
Satoshi
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UCC28950EVM-442: Question about function and setting
Part Number:UCC28950EVM-442
I have three points question below for UCC28950EVM-442;
①When measured voltage waveform near the transformer, attached below.
It look a little gap:⊿t=162ns, is it normal operation?
②Component selection of D5 and D11.
The other board(750Vin ⇒ 140Vout/10A) using 1000V/3A diode for reduce ringing, but troubling large power dissipation.
I want to know way to good choice these diode.
③Is there layout guideline for Transformer?
Customer will use PQ core transformer, they are worrying about bad influence for field magnetic.
I want to know information about field magnetic and careful points on board.
※EVM external components is default setting.
Best regards,
Satoshi
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UCC28064A: for 2-ph Interleaved flyback
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LM5021: how do we improve load regulation for muliple output fylback as conventional tips?
Part Number:LM5021
hi, team.
this is Suzuki.
i have a question regarding isolated flyback ,multiple related load regulation.
now i've designed isoalted fflyback, but I dont know how to improve my design to be improved especially load regulation for the output rail it doesnt regulate.
are there any tips or apps note to know how to improve it ?
thanks.
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