[SOLVED] Switching frequency data not available

[FreshmanNewbie]

Why do some dc-dc buck or boost converters do not have the switching frequency value in their datasheet?

For example: Link does not have switching frequency ?

Is it possible to get power dissipation of a dc-dc boost converter?

 

[barry]

Why do some dc-dc buck or boost converters do not have the switching frequency value in their datasheet?

For example: Link does not have switching frequency ?

Is it possible to get power dissipation of a dc-dc boost converter?

READ THE DATA SHEET!!

Right there, on page 4, is a graph of SWITCHING FREQUENCY VS. LOAD.

 

[KlausST]

Hi,

@barry: no need to shout...

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indeed it´s a PFM regulator. PFM means Pulse Frequency Modulator. Thus the frequency changes with load ... in a wide range.

In opposite the PWM regulator: Pulse width modulator. It varies the duty cycle ... while the frequency is about constant.

Klaus