TPS54340B-Q1: fixed Switching frequency over 2Mhz

Dexter Choi

Expert 2795 points

Part Number: TPS54340B-Q1
Other Parts Discussed in Thread: LMR14020-Q1

Dear sir,

Vin is variation at 24V ~ 32V because main power is automotive (24V BATTERY).

Vin : 24V ~ 32V

Vout : 12V

Iout : 2A

I have a question as below.

when vin is variation between 24V and 32V. switching frequency is fix? or changing?

we want to fix switching frequency over 2Mhz because of EMI issue.

over 4 years ago

0 Arief Hernadi over 4 years ago

TI__Mastermind 23815 points

Hi,

As long the part does not hit minimum on time, current limit, or drop out some kind of fault condition, then yes, the part should operate in 2MHz switching frequency.

I believe there is more better parts that is design with better EMI performance such as LM53625 (http://www.ti.com/product/LM53625-Q1) or LMR14020-Q1 http://www.ti.com/product/LMR14020

These parts are design with spread spectrum features which have EMI consideration in mind

Thanks

-Arief

Power management

Power management forum

TPS54340B-Q1: fixed Switching frequency over 2Mhz