LM3409: Questions about the maximum switching frequency for LM3409 supported

Jacky Wang(QD)

Genius 10410 points

Part Number: LM3409

Hi Team,

Our customer wants to know what's the maximum switching frequency supported for LM3409? Can you help to check it?

Thanks a lot!

over 2 years ago

+1 fhoude over 2 years ago

TI__Mastermind 19035 points

Hello Jacky,

This is not a fixed frequency part. It is a hysteretic controller. The frequency is dependent on conditions, Roff, and Inductance values. It should be able to go to 2+ MHz and we have a min on time requirement of 115ns, but if you go much higher than 2MHz the switching losses can really add up. The best way to figure out if this will work for their application is to get an EVM, do calculations outlined in the datasheet and test it in their application.

-fhoude

0 Jacky Wang(QD) over 2 years ago in reply to fhoude

TI__Genius 10410 points

Hi Fhoude,

Got it, thanks for the reply.

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LM3409: Questions about the maximum switching frequency for LM3409 supported