This document summarizes the design of a 50W flyback converter with an input voltage of 5V, output voltage of 10V, and switching frequency of 200kHz. The converter is designed to operate in continuous conduction mode for loads between 10W and 50W, with maximum output voltage ripple of 1.5% of the output voltage. The design calculations show that a 22uF capacitor is required to limit the output ripple to the specified level. Simulation waveforms confirm the output voltage is 10V with 1A current, while the inductor current is 2A with 0.3A ripple.

1. EE 560: Power Electronics Converter
Flyback Converter
Name : Akash Vishwakarma
Roll No. : 224102101 20th Spt. 2022
1 Objective:
Design a 50 W flyback converter with maximum ripple in output voltage as 1.5 % of output
voltage.The converter is working in continuous conduction mode for a load variation of 10 W to
50 W.Parameters of the converters are input voltage (Vin) = 5 V, output voltage (Vo) = 10 V,
switching frequency (fs) = 200 kHz, N1 = N2.
2 Flyback Converter Design:
2.1 Filter Capacitor
• The capacitor value is calculated using the given output voltage ripple as 1.5%:
∆Vc =
∆Q
C
=⇒ 0.05 ∗ Vo =⇒ C =
DIo
fC
(1)
• Therefore, the value of the inductor is C = 22 µF.
2.2 Simulation model of Flyback Converter:
1

2. 3 Waveforms and Results:
Output Voltage 10V Output Current 1A
Inductor Current 2A Ripple in Inductor Current 0.3A
2