1. Dr. Unnikrishnan P.C. Professor, EEE
EE305 Power Electronics
Dr. Unnikrishnan P.C.
Professor, EEE

2. Switched Mode Regulators
Modern electronic devices use digital electronic circuits and integrated circuits, both needs regulated DC power supplies.
SMPS is widely used as it reduces the size and weight
A filter (LC) at the output reduces ripples in the chopper
PWM is generally employed to control the switching operation of the chopper

3. SMPS

4. DC Regulator topologies
(a) DC regulators without isolation 1. Buck Regulator 2. Boost Regulator 3. Buck-Boost Regulator 4. Cuk Regulator (b) DC regulators with isolation 1. Flyback Regulator 2. Forward Regulator 3. Push-Pull Regulator 4. Half Bridge Regulator 5. Full Bridge Regulator

5. Buck Regulator

6. Buck Regulator-Analysis

8. Buck Regulator-Analysis…..

9. Buck Regulator-Analysis…..

10. Buck Regulator-Analysis…..