PWM CONTROLLED DC-DC BOOST CONVERTER DESIGN AND IMPLEMENTATION

Abstract

In this study DC-DC boost converter circuit was designed and implemented. The converter input voltage range determined as 9V-30V DC and output voltage of boost converter is created as 48V DC. This converter has potential uses 48V compatible applications. In this circuit design, the implementation of a PWM DC/DC boost converter contains two subsystems – a conventional PWM boost converter and a control circuit. A PIC microcontroller is used to send the gating signals to a driver which drives the Metal-Oxide-Semiconductor Field Effect Transistors (MOSFET), allowing the converter’s output to be kept steady at 48V and 220 W through pulse width modulation, even with a fluctuating input voltage. A switching frequency of 100 kHz was achieved, and PWM control method was used for switching. The use of a PWM boost converter allows for a variable input and constant output. The output is regulated by the control circuit which adjusts the duty cycle of the gating pulse to maintain a constant output