Hi Abhishek,
I recommend using the LM25143 quickstart calculator: https://www.ti.com/tool/LM5143DESIGN-CALC
Set Vout = 20V first and derate the ceramic output capacitance accordingly. Then fix the compensation values and check the loop with Vout =…
Hi Malakondareddy,
Can you send more specifics of the circuit you're trying to simulate - Vin range, Vout, Iout, Fsw - and I will try it. As an alternative, please refer to the LM25149 quickstart calculator https://www.ti.com/tool/LM5149-LM25149DESIGN…
Hi Nicolas,
I suspect you have huge inductor core loss and/or FET switching loss.
Send on a completed quickstart calculator file so we can examine the power losses: https://www.ti.com/tool/LM5146DESIGN-CALC
PS: given the max Vin of 58V, the LM5145…
Hi Mohsin,
It's good practice to fill out the quickstart calculator for your design https://www.ti.com/tool/LM63460-LM64460DESIGN-CALC .
Note that 1.2uH seems high here. We use a 0.76uH in the EVM, and that's for a 5V output. You may use 0.47uH or…
Hi Andrew,
No, the slope comp is not applicable in that calculation. Take a look at the LM5143 quickstart calculator to assist with the design.
https://www.ti.com/tool/LM5143DESIGN-CALC
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Tim
Part Number: LM5017 Hello TI,
Kindly point me to central repository for latest proven version of Calc xlsx sheet (Tried search in TI e2e as well as google, but all lead to e2e forum only)
One gets to see number of these being shared in e2e forum, appearing…
Hello Frank,
Yes, you can try to reduce the switching frequency by adjusting the RON resistor. please use the design calculator to modify your design to a lower switching frequency making sure you do not violate any critical specifications.
FLYBUCK-FLYBACK…
Part Number: LM5180-Q1 Other Parts Discussed in Thread: LM5180 , LM5181 Tool/software: I start to do worst case analysis for our design and I have some confusion about the LM5180 PSR flyback converter quickstart tool and datasheet.
Datasheet- https://www…
Hi Lionel,
I don't think it should be an issue as long as you aren't in violation of the high side current limit.
I recommend to use the quickstart calculator in addition to your calculations as a sanity check:
https://www.ti.com/tool/LM5017-QUICKSTART…
Hi Sun,
Thanks for using the e2e forum.
You mentioned the VDD_OUT is 0V. This would also mean that the initial DC power supply has 0V, as there is a direct path from input to output in a boost topology. Even if the device is inactive, the output voltage…