IRF250 Mosfet Amplifier Circuit Diagram

IRF250 Mosfet amplifier is using for HI-FI audio systems. Nowadays it is used as a power subwoofer amplifier driver board. The IRF250 MOSFET amplifier circuit is very easy to build, because of few components we get the power output around 200 watts at 4-ohm impedance.

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Contents

200w IRF 250 amplifier circuit diagram

Components required

PART NUMBER	QUANTITY
IRFP 250 mosfet	4
2N5401 PNP transistor	3
MJE340 NPN transistor	1
BD 139 Transistor	1
1uf/50v capacitor	1
470uf/63v	4
100uf/63v	1
4.7uf/63v	1
300 pf capacitor	1
100nf	4
10pf	2
22pf	1
5k potentiometer	1
1N4007 diode	4
Resistors not mentioned

The power amplifier is working with four pair of IRF250 mosfets. They are easily avilabe in nearest electronic shops. the circuit is assembled and the working is awsome.

The four irf250n MOSFET circuit designed as a mono audio amplifier. you can able to make it as a stereo audio amplifier by building the same circuit. connect left and right input audio signals to use as a powerful stereo audio amplifier. The working audio signal range is very awesome. it can work at the audio signals from 20HZ to 20Khz range. The 20Hz range the bass region work and performance is very nice.

IRF250 mosfet amplifier circuit supply voltage

The power supply for the better working we will provide the input voltage of 45v. The symmetrical or dual polarity supply to be injected. That’s mean -45 v 0v +45v respectively. use 50v nearest transformer with 5Amps for mono. If you are using this amplifier in the stereo mode you need to add extra power to the supply means you need to increase the input ampere up to 8 amperes.

For rectification, purposes use 35amps bridge metal diode and use a capacitor of 4700uf at least. increase the pair of irf250 MOSFET to increase the power output of the audio amplifier. you can able to increase the audio amplifier power up to 500watts.

Also, check other interesting Audio amplifier circuits here