Hello Guys,
This is the first time that I am posting to this forum. I hope I will enjoy the forum
I have couple of question regarding to a project that I am working now.
First of all, Let me describe what really I want to do.
I am designing efficient and cost effective buck converter for the >>12V systems and uCs.
I have these below parameters;
Vin= 14V up to 48V
Vout =5V ~ 3.3 Volt
Iout = 30mA
Fsw = 150kHz
According to the above values I have find my output inductor value 150uF
and for the output capacitor I have used 2200uF (I may change this capacitor, I am willing to hear your advise to which value I need to replace )
I am controlling my output with the voltage controlled PID compensator and also using Comparator to change my duty cycle.
But Unfortunately I am having a lot of problems with selection of mosfet!
First of all, I used n-channel mosfet and It was working good (at least I thought that it works good ) When I change it to logic level P-Channel, I could not switch the Mosfet!
Any suggestion to which mosfet brand or model should I Use ? Since I wanna have cheap solution, I don't want to use n channel due to its' drive circuit. Please suggest some p-channel
Also for the controlling of output voltage, can you advise me some cheap controller name?
I also would like to ask you if you can give me some application note or tutorial for the Buck converter?
This is the first time that I am posting to this forum. I hope I will enjoy the forum
I have couple of question regarding to a project that I am working now.
First of all, Let me describe what really I want to do.
I am designing efficient and cost effective buck converter for the >>12V systems and uCs.
I have these below parameters;
Vin= 14V up to 48V
Vout =5V ~ 3.3 Volt
Iout = 30mA
Fsw = 150kHz
According to the above values I have find my output inductor value 150uF
and for the output capacitor I have used 2200uF (I may change this capacitor, I am willing to hear your advise to which value I need to replace )
I am controlling my output with the voltage controlled PID compensator and also using Comparator to change my duty cycle.
But Unfortunately I am having a lot of problems with selection of mosfet!
First of all, I used n-channel mosfet and It was working good (at least I thought that it works good ) When I change it to logic level P-Channel, I could not switch the Mosfet!
Any suggestion to which mosfet brand or model should I Use ? Since I wanna have cheap solution, I don't want to use n channel due to its' drive circuit. Please suggest some p-channel
Also for the controlling of output voltage, can you advise me some cheap controller name?
I also would like to ask you if you can give me some application note or tutorial for the Buck converter?
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