Part Number:UCC25600
Hi, I am using your excel design tool for a new design with the UCC256404. I would like to make some changes that are not allowed in the worksheet. Do you by any chance have a Mathcad worksheet that is not locked for this?
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UCC25600: UCC256404
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UCC28740: Calculation Tool Inductance Value
Part Number:UCC28740
Hello,
We are working with the UCC28740 design spreadsheet calculator and had a question.
- In box C54 I see a calculated primary inductance of 493uH (which is expected) with a 0.9 ohm sense resistor (recommended 0.089).
- Then if I change the "Actual Current Sense Resistor" from 0.9 ohm to 0.075 (which is lower than recommended 0.089) then the calculated inductance drops to 41uH.
- I don't see why the sense resistor value would affect the inductance so much?
>>>>> Excel Calculation with 0.9 ohm sense resistor >>>>>
>>>>> Excel Calculation with 0.075 ohm sense resistor >>>>>
>>> Calculation Tool >>>
(Please visit the site to view this file)
Thanks very much for your help. Keith
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BQ25895: what is the meaning of battery load in BQ25895?
Part Number:BQ25895
Hi there,
Our customer had question about how to understand the register to enable/disable battery load and BAT_LOADEN from our datasheet duo to it had no detail description about it.
And I check the datasheet ,Could it be described as to enable Battery discharge load curren?
Big thanks！
Eason
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BQ24618: Pin 3 of this device was oscillating
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LMZ12008EVAL: Can't locate Gerber files as mentioned in data sheet
Part Number:LMZ12008EVAL
Please help- We are trying to locate the Gerber files for 12008Eval board for testing. Datasheet says they are located in the associated product folder, but w can't locate them. Any ideas?
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TPS62142: TPS62142 load regulation issue at higher input voltages
Part Number:TPS62142
I am using the TPS62142 to regulate from 12V input to 3.3V output. The output also feeds a supercap circuit but is protected by a diode so there is no back current. The supercap generate 3.3V for an MPU. We have noted brownout issues with the MPU that we had not been able to correlate with any failure mechanisms but now we have been able to find a repeatable issue. With the TPS62142 at 12V input there are not issues. If we increase the input voltage up to 16V from 12V there are no issues. However, if we power up the system with the input voltage >14.76V (but <16V) the TPS62142 (which is rated 17V input max) starts to lose output regulation, leading to oscillation and reduced current that disables supercap charging. Per the data sheet the only issue I would see at the higher input voltages would be the switching frequency being reduced by approximately 500kHz (but still over 1MHz). It almost seems like the higher input voltage causes the regulator to operate like a lightly loaded regulator with oscillation. The circuit is directly from the datasheet and the layout looks very much like the layout in the datasheet (Rev. E of the datasheet). If we power up at 15V so that we have the issue but reduce the input to 14V then ramp back up there is no issue. It only occurs when the input voltage is >14.76V at power up. We were thinking that the supercap inrush at power up might be an issue but think that this would be more of an issue at 12V than 15V due to the higher headroom. Can you give me some direction on what we should look at next? Although the issue is intermittent is happens often enough that just saying we have bad parts doesn't seem valid. The part does not get very hot so we do not think we have a thermal issue. Thank you.
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LEDSPIMCUEVM-879: LEDSPIMCUEVM-879: DOWNLOADING GUI SOFTWARE
Part Number:LEDSPIMCUEVM-879
I am unable to find the software for my evaluation kits I just received. There is nothing in the box, no link, disk or otherwise. How do I get the EVM kit GUI software?
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TPS3701: Internal parasitic capacitance
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TPS63020: Is Quiescent Current for both or each of the VIN or VINA
Part Number:TPS63020
Dear sir/madam,
From the datasheet of the TPS63020DSJR, we see that the quiescent current is listed as VIN and VINA in the same row. Does this mean that the quiescent current total for both is shown or do we need to double the values shown for our quiescent current estimate.
Thank you.
Best regards,
--
Adriel Siew
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TPS546C23: four TPS546C23 in two power modules
Part Number:TPS546C23
I want to design a dual power system. The two power supplies are 1+1 redundant backup. If one of the power modules is unplugged, the other module works normally. Each power module needs to supply 5V/50A current. If each module uses two TPS546C23, can the output of the four TPS546C23 in two modules be connected together ? We need load balancing.
If 4 X TPS546C23 can't be stacked, is there any good solution?
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BQ40Z80: BQ40Z80 Firmware for 7s
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BQ25601: BQ25601 device
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TPS24750: What will happen when Rset open before power on?
Part Number:TPS24750
Hi Experts,
We want to know what will happen when Rset resistor opened before power on?
Can it output normally? or what function will be affected?
Thanks.
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TPS53353: TPS53353 PGOOD Signal shake issue.
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BQ34Z100: BQ34Z100PWR Programming Guide
Part Number:BQ34Z100
Dear Team
My customer is asking if BQ34Z100PWR has
1.Programming Guide.
2.Bring-up Initial code.
3.Application Notes for supporting SW bring-up
could you please help?
thank you
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LM5170-Q1: LM5170 as charger
Part Number:LM5170-Q1
Hi Team
My customer has question for LM5170 as charger, but requires SW to do this.
Do we have any related document as below?
thank you
1.Programming Guide.
2.Bring-up Initial code.
3.Application Notes for supporting SW bring-up
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TPS92692: TPS92692 Buck-boost current issue
Part Number:TPS92692
My customer spec as follow:
Vin : 14 ~ 28V , Vout : 24V , Iout : 1A ,
Currently encountering input 24V, the output current cannot reach 1A,
At present, the test input and the output LED VF voltage need to be 8V,
the output current can reach 1A, please help us with any suggestions, Thanks.
Circuit and design tool as an accessory.
(Please visit the site to view this file)(Please visit the site to view this file)
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LM5143-Q1: gate drivers during enable off
Part Number:LM5143-Q1
Hi there,
I have a crowbar across the output to shorten them. To check the crowbar status I plan to add a small voltage into the output caps, measure the voltage and shorten them and measure the voltage.
I have checked the manual but did not find information according gate driver position (H/L) during Enable=OFF. May be its hidden in the text....
Could you give me a tip according this, thanks.
Frank
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BQ76PL455A-Q1: voltage measurement wrong
Part Number:BQ76PL455A-Q1
Hello,
I am trying to balance 13 cells using EM1402 evaluation board. But while monitoring the cell voltages using bq76pl455-q1 , the voltage of 6th and 7th channel is reporting wrong. Rest all voltages are measuring correctly . what might be the probable problem ?
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TPS2121: Which source is used and the State of ST PIN
Part Number:TPS2121
Voltage on PR1: 1.99V
Voltage on CP2: 1.64V
Which source will be used and what will be the state of ST pin when each of this drops to 0V ?
Thanks in advance
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