Power PSo C 101 Intro to Power Converters

Power PSo. C 101: Intro to Power Converters

Course Outline Section 1: Power Converter Overview Section 2: Power Converter Circuit Elements Section 3: Operating Principle Section 4: Converter Topologies Section 5: Converter Transfer Functions Section 6: Control Techniques

Course Objectives At the end of this course, you should be able to: Define the functional requirements for a power converter Identify power converter variants and their constituents Explain the principle of operation of power converters List basic topologies and their transfer functions Explain the concept of commonly used control techniques

1 Power Converter Overview

What is Power Converter? A power converter is an electronic circuit that processes power in its available form and converts it to the required voltage/power levels that the devices specifically demand

Common Converter Characteristics • • Voltage regulation Efficiency Noise, Distortion, Power Factor Communications interface Size Safety Protection

2 Power Converter Circuit Elements

Power Converter Components Semiconductor Switch • Unidirectional • Bidirectional

Power Converter Components

Power Converter Components Inductor • Lossless reactive circuit element • Stores energy in its magnetic field • Instantaneous voltage proportional to rate of change of current § Steady state average voltage across the inductor equals zero.

Power Converter Components Capacitor • Lossless reactive circuit element • Stores energy in its dielectric field • Instantaneous current proportional to rate of change of voltage • Steady state average current through the capacitor equals zero.

3 Operating Principle

Operating Principle

4 Converter Topologies

Power Converter Topologies Buck: Vo <= Vi Boost: Vo >= Vi Buck-boost: Vo <=> -Vi

5 Converter Transfer Functions • Converter Transfer Functions

Steady State Transfer Function - Buck Vo = D. Vi

Steady State Transfer Function - Boost Vo = Vi/(1 -D)

Steady State Transfer Function – Buck-Boost Vo = -D. Vi/(1 -D)

6 Control Techniques • Control Techniques

Control Techniques – Voltage Mode

Control Techniques – Peak Current Mode

Course Summary Overview to power converters and its common characteristics basic circuit elements used in a power converter operating principle of converters 3 basic topologies the buck, boost and buck-boost state transfer functions for the basic converter types Peak Current and voltage mode techniques

Next Steps • On-Demand Training NOW • Hands-On Workshops • Webinars www. cypress. com/training • Learn More about PSo. C hardware design tools and PSo. C-based solutions at www. cypress. com/psoc Support Technical Resources www. cypress. com/support Online Support CYPros www. cypress. com/designresources Phone Hotline, (425) 787 -4814 Technical Reference Manual Datasheets/Application Notes Reference Designs