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microcontrolled buck converter battery charger

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s.manikandan

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I have to design VRLA battery charger for our ups higher rating application... i decide to go for dc/dc BUCK converter topology for our application...
Vin - 250 - 410V
Vo -72-230.4V
Io - 1 to 20A

I need to control the converter using microcontroller. I need to give command to the converter to operate in CONSTANT VOLTAGE mode at particular time and some other time CONSTANT CURRENT mode... how to implement this algorithm in controller.....

If we give command to work at particular voltage (ex: 129v),the pwm should change accordingly to give that voltage..
 

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