Question

1. Buck Converter:

• Theory, schematic, operation, advantages, application, duty cycle, efficiency
• Design calculation

Example:

              Input voltage:                       min 12V max 17V

           Output voltage:                    nominal (regulated) 15V

           Nominal load current:        3 A            

           Max Switching frequency:             20 kHz

          Output voltage ripple:        25 mV

Draw the schematic, find L, C, Diode current, max drain voltage, max and min duty cycle

Answer 1

The buck converter is a DC-DC converter that efficiently converts a high voltage to a low voltage efficiently. Efficient power conversion extends battery life, reduces heat, and allows for smaller gadgets to be built. The buck converter can be used in lots of cool applications.Buck converters  find most of their applications in high-performance dc drive systems, e.g. electric traction, electric vehicles, and machine tools. The dc motors with their winding inductances and mechanical inertia act as filters resulting in high-quality armature currents. The average output voltage of buck converter is a linear function of the switch duty ratio.