Hi , I am designing a charge controller for a 48V lead-acid battery . So i have to design a buck boost converter i selected inverting topology buck boost converter.
I am using mosfet IRFP150N . PIC microcontroller for pwm pulse 5khz , and a3120 gate drive optocoupler to mosfet gate from microcontroller.
design parameter are input voltage varies from 20V to 70V . output 54V (including losses) . L=2mH, C=1.62mF .
Problem is my capacitor burst for a input voltage of 25V from rps and there is no boosting operation for duty cycle increment .
someone guide me to design the converter .
I am using mosfet IRFP150N . PIC microcontroller for pwm pulse 5khz , and a3120 gate drive optocoupler to mosfet gate from microcontroller.
design parameter are input voltage varies from 20V to 70V . output 54V (including losses) . L=2mH, C=1.62mF .
Problem is my capacitor burst for a input voltage of 25V from rps and there is no boosting operation for duty cycle increment .
someone guide me to design the converter .
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