Regulator for Peltier Element

[Irina]

For my thesis, I have to design a regulator which controls a Peltier Element (12V, 5 A) to control the temperature in a mini fridge.
I was told I have to measure the temperature inside the fridge with pn junction, compare it to a given value and use the resulted difference to make a PWM command to the Peltier.
I designed a circuit, but I can't manage to simulate it in Spice, so I can't know if the components are dimensioned correctly.
Could you please tell me if I should modify anything?
Thanks a lot!

 

[Colin Mitchell]

You simply turn the module and off with a schmitt trigger arrangement and the thermistor.
You will need a fan and heatsink to keep the module cool.

 

[Irina]

Ok, thank you!
But are the components dimensioned correctly, so that nothing gets burnt and there is enough voltage at the output, so that the NMOS can function?