Inductance on input of TPS54360

Vladimir Aparin

Other Parts Discussed in Thread: TPS54360

I'm using WEBENCH generated schematics for TPS54360 based powersource (5.46V 3A)

When i'm adding coil between source and VIN pin of IC i can't reach required current. Max output - 1A.
Without coil all's work fine.

Have are any additional requirements for Inductance on input of TPS54360?

over 12 years ago

0 JohnTucker over 12 years ago

TI__Guru**** 191445 points

You should be able to place an inductor is series with your VIN source. Make sure the input bypass capacitor is after the inductor and as close to the IC VIN and GND pins as possible. make sure the DCR of the inductor is low and the inductor is rated for the input current.

0 Anthony F over 12 years ago in reply to JohnTucker

TI__Mastermind 35165 points

You may also require some damping. The following article explains this very well. http://www.eetimes.com/document.asp?doc_id=1273268

Also the following application note on conducted emissions can be used help you choose the right damping capacitor based on the added input inductance. http://www.ti.com/lit/an/snva489c/snva489c.pdf

Best Regards,
Anthony

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Inductance on input of TPS54360