Hi. I'm facing a problem with a DC-DC Buck Converter here
I'm on the project about to build a Solar Charging to battery
I plan to use a 7.2V 2800mAh for the battery and 20V 1.12A Solar cell here
and to use the buck converter I using Arduino as Microcontroller to control it on "Constant Current and Constant Voltage Mode" a
And I used the Orcad to simulate the buck converter that I want the input 20V 50kHz & output around 0.6mA
After this I tried to build it with MOSFET / Diode and use only resistance as load (Not using the Battery yet)
but the voltage don't even go through the MOSFET even if I add the gate voltage to 15V (I use STB80NF55)
here is the picture of the circuit of buck converter I simulated
http://upic.me/show/54738967
Any Suggestion on MOSFET and Diode to use & how to calculate the L,C of Buck ? Thx
Edit : As if I know I have to use the Gate Driver here since the Vgs have to be over the voltage of battery, but atleast I want to know the output to see the different here)
I'm on the project about to build a Solar Charging to battery
I plan to use a 7.2V 2800mAh for the battery and 20V 1.12A Solar cell here
and to use the buck converter I using Arduino as Microcontroller to control it on "Constant Current and Constant Voltage Mode" a
And I used the Orcad to simulate the buck converter that I want the input 20V 50kHz & output around 0.6mA
After this I tried to build it with MOSFET / Diode and use only resistance as load (Not using the Battery yet)
but the voltage don't even go through the MOSFET even if I add the gate voltage to 15V (I use STB80NF55)
here is the picture of the circuit of buck converter I simulated
http://upic.me/show/54738967
Any Suggestion on MOSFET and Diode to use & how to calculate the L,C of Buck ? Thx
Edit : As if I know I have to use the Gate Driver here since the Vgs have to be over the voltage of battery, but atleast I want to know the output to see the different here)
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