Hello Everyone,
I am building a buck-boost converter for my exam. I use a 9V battery to provide the input voltage and an arduino to provide the PWM signal for the mosfet (IRLZ44N). It operates at 60 kHz. When I change the duty cycle with the potentiometer it works fine in buck mode but as soon as it reaches a higher voltage range (when it is in boost mode) it just suddenly goes back to zero volt. The same happened with and without load resistor. Why is that? I might have just overlooked something obvious, I don't know. Any help would be appreciated. Components used: 1N5819 schottky diode, IRLZ44N mosfet, 220uF/35V electrolytic capacitor, 33uH/3A inductor, 100kohm potentiometer.
I am building a buck-boost converter for my exam. I use a 9V battery to provide the input voltage and an arduino to provide the PWM signal for the mosfet (IRLZ44N). It operates at 60 kHz. When I change the duty cycle with the potentiometer it works fine in buck mode but as soon as it reaches a higher voltage range (when it is in boost mode) it just suddenly goes back to zero volt. The same happened with and without load resistor. Why is that? I might have just overlooked something obvious, I don't know. Any help would be appreciated. Components used: 1N5819 schottky diode, IRLZ44N mosfet, 220uF/35V electrolytic capacitor, 33uH/3A inductor, 100kohm potentiometer.