Buck Converter (Wide range of Input Voltage to Output a fixed Voltage)

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MrsssSu

Joined Sep 28, 2021
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Hi People :),
This is a step up dc to dc converter. This schematic inputs a 15V and outputs a 22V DC. However, I want the input range to be between 3V to 50V and all gives the same constant 22V DC output current. How can this be done with UC 3845. I have attached the schematics below and spice files. Can anyone help to edit the schematic and add some components so that the this circuit can take a range of input voltages?

Thank you for reading :)
Quest
 

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