Hi All,

I have been looking into PWM lately. I understand the concept that a variable resistor generates a resistance and tells a controller what frequency to pulse the PWM output at; this pulsing signal can be fed to a MOSFET which will turn on and off at a rate to emulate the desired output voltage.

I am confused about amperage available. If a MOSFET is implimented which is capable of 10 amps, how can you be sure 10A can really be provided? Is there an amperage rating for the output on the PWM controller that has to be same-or-higher than the desired Amps you want available from the output MOSFET?

If someone can clear this up it would be appreciated, I'd like to understand this PWM concept fully!

Randy

I have been looking into PWM lately. I understand the concept that a variable resistor generates a resistance and tells a controller what frequency to pulse the PWM output at; this pulsing signal can be fed to a MOSFET which will turn on and off at a rate to emulate the desired output voltage.

I am confused about amperage available. If a MOSFET is implimented which is capable of 10 amps, how can you be sure 10A can really be provided? Is there an amperage rating for the output on the PWM controller that has to be same-or-higher than the desired Amps you want available from the output MOSFET?

If someone can clear this up it would be appreciated, I'd like to understand this PWM concept fully!

Randy

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