Maker Pro
Login Join Maker Pro
Or sign in with

Menu

Connect With Us

Network

Search results

  1. noLimits

    Power Amplifier for thermoelectic cooler with Op-Amp and Power MOSFET PROBLEM

    Ok i should go to sleep now :D I guess this thing confuses me more than it should. What I don't get though is, it doesn't amplify this said current, this is rather just the current that controls the 3 A provided by the power supply or am I wrong again?
  2. noLimits

    Power Amplifier for thermoelectic cooler with Op-Amp and Power MOSFET PROBLEM

    Wait I thought it would be 2.93 A through the MOSFET? And these could be provided by the power supply? why less than 1 mA? I hope I'm not annoying you too much with all these questions, I just want to understand this thing and not just knowing what it does before touching it.
  3. noLimits

    Power Amplifier for thermoelectic cooler with Op-Amp and Power MOSFET PROBLEM

    It says in the data sheet of the controller that it provides 0-20 mA when the load is smaller than 500 Ω and if its greater than that, it switches to 0-10 V. So isn't it completely irrelevant for the opamp what the current in that circuit is for theres (almost) no current going in the opamp and...
  4. noLimits

    Power Amplifier for thermoelectic cooler with Op-Amp and Power MOSFET PROBLEM

    Hello duke37, thank you for your quick reply! So if I got that right the maximum current is 6 A for this thermoelectric cooler. That should mean I can also run it with 3 A but it doesn't cool as much -> this should not be an issue? I could reproduce your calculations fairly simple but I dont...
  5. noLimits

    Power Amplifier for thermoelectic cooler with Op-Amp and Power MOSFET PROBLEM

    Hello there! This is my first post, so please be kind if I do something wrong here :D I have a regulated circuit for a thermoelectric cooler (112.7 W, Impedance: 4.7 Ohms, max. Current 6 A, V max 29.8 V, max Temp change 74 °C). I know that this worked but it is somehow broken. So i need to...
Top