LM5115: Is the frequency of LM5115 fixed and how to set it?

Jerry Hsueh

Expert 2730 points

Part Number: LM5115
Other Parts Discussed in Thread: LM5145

Hi TI

We want to design a non-isolated power supply.

Input is 12-48V, output is 1.0V/10A. Is LM5115 feasible?

Is the frequency of LM5115 fixed and how to set it?

Thank you

Jerry

over 5 years ago

0 Frank De Stasi over 5 years ago

TI__Guru 64695 points

The Webench design tool should be able to help you find a solution based on your design specifications.

0 Jerry Hsueh over 5 years ago in reply to Frank De Stasi

Expert 2730 points

Hi Frank

Thank you.

But I could not find LM5115 on Webench to simulate it.

Jerry

0 Frank De Stasi over 5 years ago in reply to Jerry Hsueh

TI__Guru 64695 points

Sorry, I did not realize it was not on Webench.

I will pass your question to an Apps engineer with more experience with this device.

0 David Baba over 5 years ago

TI__Mastermind 33090 points

Hello Jerry,

The clock frequency is set by the Ramp pin, refer to EQ 6 in the Datasheet.

However, there are many other devices suitable for the specification mentioned above, is there any particular reason why the LM5115 was chosen, other than a post secondary side DC to DC converter?

For example for the specification above, please consider the LM5145.

Hope this helps?

Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

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LM5115: Is the frequency of LM5115 fixed and how to set it?