LM63625QDRREVM: Switching node Rise and fall time

Sathish Raja

Prodigy 210 points

Part Number: LM63625QDRREVM

Hi,

I am calculating Switching loss in the power supply.

So I am inneed of the Rise and fall time of Switching node voltage.

Vin=24V Vout=3 3V Io=1A(max)

Kindly send me the details.

over 3 years ago

0 Daniel Li14 over 3 years ago

TI__Mastermind 27040 points

HI Raja:

could you let me know is it based on default EVM frequency?

Thanks

0 Sathish Raja over 3 years ago in reply to Daniel Li14

Prodigy 210 points

No,Switching frequency = 985Khz

0 Daniel Li14 over 3 years ago in reply to Sathish Raja

TI__Mastermind 27040 points

Hi Raja:

got it, we will test it and send to you the data.

Thanks

0 Sathish Raja over 3 years ago in reply to Daniel Li14

Prodigy 210 points

Hi Daniel,

Please send me those values(Rise/fall time) soon.

I have another question.

What is the leakage current of Rt pin(frequency setting pin)?

Thanks

Sathish

0 Daniel Li14 over 3 years ago in reply to Sathish Raja

TI__Mastermind 27040 points

HI Raja:

I will send to you next monday, for leakage current, you mean excpet the current go through Rt ?

0 Sathish Raja over 3 years ago in reply to Daniel Li14

Prodigy 210 points

Hi Daniel,

Please ignore the leakage current question raised.

Kindly send me the values for Rise/fall time.

Thanks

Sathish

0 Daniel Li14 over 3 years ago in reply to Sathish Raja

TI__Mastermind 27040 points

falling : 3ns, which is around 8V/ns

rasing:7ns, which is around 3.5V/ns

+1 Sathish Raja over 3 years ago in reply to Daniel Li14

Prodigy 210 points

Hi Daniel,

Thank you.

If its default frequency of 2.1MHz would these values still be valid.

If it differs kindly send me those values also.

Thanks

Sathish

0 Daniel Li14 over 3 years ago in reply to Sathish Raja

TI__Mastermind 27040 points

yes, we test both frequency, it is same.

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LM63625QDRREVM: Switching node Rise and fall time