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TPS54340B-Q1: fixed Switching frequency over 2Mhz

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.