The author perfected this article on December 28th

Catalog

Introduction to Power Topologies

I SMPS Topologies & Formulas

1. Buck

The input-output voltage relation:

Current through the transistor switch:

Voltage in the transistor switch:

Current through the diode:

Inverse voltage in the diode:

2. Boost

The input-output voltage relation:

Current through the transistor switch:

Voltage in the transistor switch:

Current through the diode:

Inverse voltage in the diode:

3. Buck-Boost

The input-output voltage relation:

Current through the transistor switch:

Voltage in the transistor switch:

Current through the diode:

Inverse voltage in the diode:

4. Sepic

The input-output voltage relation:

Current through the transistor switch:

Voltage in the transistor switch:

Current through the diode:

Inverse voltage in the diode:

5. Flyback

The input-output voltage relation:

Current through the transistor switch:

Voltage in the transistor switch:

Current through the diode:

Inverse voltage in the diode:

6. Forward

The input-output voltage relation:

Current through the transistor switch:

Voltage in the transistor switch:

Current through the diode:

Inverse voltage in the diode:

7. 2-Switch Forward

The input-output voltage relation:

Current through the transistor switch:

Voltage in the transistor switch:

Current through the diode:

Inverse voltage in the diode:

8. Active Clamp Forward

The input-output voltage relation:

Current through the transistor switch:

Voltage in the transistor switch:

Current through the diode:

Inverse voltage in the diode:

9. Half Bridge

The input-output voltage relation:

Current through the transistor switch:

Voltage in the transistor switch:

Current through the diode:

Inverse voltage in the diode:

10. Push Pull

The input-output voltage relation:

Current through the transistor switch:

Voltage in the transistor switch:

Current through the diode:

Inverse voltage in the diode:

II Book Recommendation

1. Switching Power Supply Design and Optimization

The latest techniques for designing state-of-the-art power supplies, including resonant (LLC) converters,The book covers modern topologies and converters and features new information on designing or selecting bandgap references, transformer design using detailed new design charts for proximity effects, Buck efficiency loss teardown diagrams, active reset techniques, topology morphology, and a meticulous AC-DC front-end design procedure.

By Sanjaya Maniktala

2. Switching Power Supplies A - Z, Second Edition

This book is the most comprehensive study available of the theoretical and practical aspects of controlling and measuring Electromagnetic Interference in switching power supplies, including input filter instability considerations.

By Sanjaya Maniktala

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Switched Mode Power Supply Design: SMPS Power Loss & Efficiency

Discussions on Switching Power Supply Topologies

Ten Principles of DC/DC Conversion Circuit Design

What is Pulse Width Modulation(PWM)

Ordering & Quality

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	PWR263S-20-3300F	Company:Bourns	Remark:RES SMD 330 OHM 1% 20W D2PAK	Package:TO-263-3, D²Pak (2 Leads + Tab), TO-263AB	PWR263S-20-3300F  Datasheet	In Stock:108 Inquiry	Inquiry
	MAX6804US29D2+T	Company:Maxim Integrated	Remark:Processor Supervisor 2.93V 2.85V to 5V 4-Pin(3+Tab) SOT-143 T/R	Package:TO-253-4, TO-253AA	MAX6804US29D2+T  Datasheet	In Stock:8225 Inquiry	Inquiry
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	MAX6315US45D3+T	Company:Maxim Integrated	Remark:IC RESET CIRCUIT 4.50V SOT143-4	Package:TO-253-4, TO-253AA	MAX6315US45D3+T  Datasheet	In Stock:23310 Inquiry	Inquiry