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the project is about the inverting buck boost converter. means that the output voltage polarity is different from input voltage. just a simple buck boost converter basic topology actually. the problem is that when i use an optocoupler, the 5V output from microcontroller is isolated from the gate...
i do not know if my circuit is correct or not. but the voltage at the gate can have the highest pulse value at 7V only which is not satisfy the Vgs,th = 10V. My lecturer told me that i need 15V to drive the gate. Please help me.. :bang::bang::cry::cry:
What do you mean that high side switching is more difficult? So, I should change to the low side configuration instead of high side? Can you explain in detail how the simple npn can help me?
I'm very sorryyyyyyyy for asking toooooo muchhhhh :cry: :cry:
Thank you FvM. Yes, in the previous thread someone had suggested TLP250 for my project but i couldnt find any at my place. Because of the very short time, i tried another alternatives suggested by my lecturers and friends such as bootstrap capacitor circuit, push pull circuit but it seems that...
Thank you KlausST. But how should i make the signal into the mosfet gate similar to the one i generated from the microcontroller? i thought the optocoupler had transferred the pwm signal, isnt it? hmm
Hi!
How to increase the voltage from optocoupler 4n35? i had connected the input pin of the optocoupler to the output pin of the microcontroller. the other pin is connected to the groud. for the other side of the optocoupler, for emitter i connect it to ground. collector is to the vcc and to the...
Thank you for your response. It means that i do really need a driver, isn't it? so, the hardware connection would be AT89S52 to DRIVER IC to MOSFET? sorry, this part is really confusing ? The input voltage will be 12V from battery source and the B-B circuit will step down the voltage to 5V.
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Hi,
I am working on a project to design a basic Buck-Boost Converter by using a 8051-based microcontroller.
However, I have a very little knowlegde on the hardware implementation especially on driving the mosfet by PWM generated on AT89S52.
Can i drive a mosfet directly from the AT89S52...
Hi, I am working on a simple project to design a basic Buck-Boost Converter by using a 8051-based microcontroller. But, I have a very low knowledge about the hardware implementation. Can i directly drive a mosfet from AT89S52? What is mosfet driver actually? Can anyone help me on how to connect...
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