NewBie to MOSFET

Thread Starter

Ravi K

Joined Apr 9, 2021
1
Hi,

I am using 12v/9A battery as power source. if we want to switch on/off the power supply at high frequency i.e. above 100Khz, is MOSFET is the right choice, please advise which component can use?

Thanks in advance.
 

Papabravo

Joined Feb 24, 2006
16,836
Hi,

I am using 12v/9A battery as power source. if we want to switch on/off the power supply at high frequency i.e. above 100Khz, is MOSFET is the right choice, please advise which component can use?

Thanks in advance.
It depends on what is going to do the switching and also what the load looks like. We just don't have enough information.
 

Audioguru again

Joined Oct 21, 2019
3,550
The gate-source of a Mosfet has a fairly high capacitance. it takes a fairly high current to quickly charge and discharge that capacitance at your high frequency. Try using a dual complementary (one NPN and one PNP) pair of emitter-followers to drive the gate.
 

wayneh

Joined Sep 9, 2010
17,153
You might generate an illegal amount of radio frequency by switching that much current above 100kHz. Just something to think about.
 
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