zhiling0229
Member level 1
Hi guys,
I'm rather new in power switching circuits.
I'm using a IRF 640 N-channel mosfet with the drain connected to approximately 9 V and the source to the load. I'm using the MOSFET as a switch to turn on my power supply using a microcontroller this power supply will be fed into a 5V regulator and a 3.3 V regulator.
I have a few problems.
The voltage drop I measure is approximately 1.6 V which drops to about 7.4 V. I'm worried that it is not enough to regulate my regulator at 5V.
Is there any other way to do it instead of using IGBT cause IGBT is really expensive.
I look in the datasheet the Vgs that was written was min 2V to max 4V does this means that I only can send a pulse to the gate in this range? Or can I send a 5V logic pulse to it?
Thanks a lot
I'm rather new in power switching circuits.
I'm using a IRF 640 N-channel mosfet with the drain connected to approximately 9 V and the source to the load. I'm using the MOSFET as a switch to turn on my power supply using a microcontroller this power supply will be fed into a 5V regulator and a 3.3 V regulator.
I have a few problems.
The voltage drop I measure is approximately 1.6 V which drops to about 7.4 V. I'm worried that it is not enough to regulate my regulator at 5V.
Is there any other way to do it instead of using IGBT cause IGBT is really expensive.
I look in the datasheet the Vgs that was written was min 2V to max 4V does this means that I only can send a pulse to the gate in this range? Or can I send a 5V logic pulse to it?
Thanks a lot