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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Ten Principles of DC/DC Conversion Circuit Design

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Ordering & Quality

Photo	Mfr. Part #	Company	Description	Package	PDF	Qty
	IS42S32400F-7TL	Company:ISSI	Remark:IC SDRAM 128M 143MHZ 86TSOP	Package:86-TFSOP (0.400", 10.16mm Width)	IS42S32400F-7TL  Datasheet	In Stock:1104 Inquiry	Inquiry
	CM2020-00TR	Company:ON Semiconductor	Remark:IC HDMI TX PORT P/I 38-TSSOP	Package:38-TFSOP (0.173", 4.40mm Width) Exposed Pad	CM2020-00TR  Datasheet	In Stock:183990 Inquiry	Inquiry
	MC9S12C64CPBE	Company:NXP / Freescale	Remark:IC MCU 16BIT 64KB FLASH 52LQFP	Package:52-LQFP	MC9S12C64CPBE  Datasheet	In Stock:2429 Inquiry	Inquiry
	MC9RS08KA1CPC	Company:NXP / Freescale	Remark:IC MCU 8BIT 1KB FLASH 8PDIP	Package:8-DIP (0.300", 7.62mm)	MC9RS08KA1CPC  Datasheet	In Stock:91 Inquiry	Inquiry
	STTH12R06G-TR	Company:STMicroelectronics	Remark:DIODE GEN PURP 600V 12A D2PAK	Package:263AB	STTH12R06G-TR  Datasheet	In Stock:11035 Inquiry	Inquiry
	MC33742PEG	Company:NXP / Freescale	Remark:IC SYSTEM BASE W/CAN 28SOIC	Package:28-SOIC (0.295", 7.50mm Width)	MC33742PEG  Datasheet	In Stock:28162 Inquiry	Inquiry
	MAX811SEUS-T	Company:Maxim Integrated	Remark:IC MPU V-MONITOR 2.93V SOT143-4	Package:TO-253-4, TO-253AA	MAX811SEUS-T  Datasheet	In Stock:33630 Inquiry	Inquiry
	RB400DT146	Company:Rohm Semiconductor	Remark:DIODE SCHOTTKY 40V 500MA SMD3	Package:TO-236-3, SC-59, SOT-23-3	RB400DT146  Datasheet	In Stock:9266 Inquiry	Inquiry
	DS1233DZ-15+T&R	Company:Maxim Integrated	Remark:IC 4.125V NO PBR 15% SOT223	Package:TO-261-4, TO-261AA	DS1233DZ-15+T&R  Datasheet	In Stock:3228 Inquiry	Inquiry
	MAX6315US31D3+T	Company:Maxim Integrated	Remark:IC RESET CIRCUIT 3.08V SOT143-4	Package:TO-253-4, TO-253AA	MAX6315US31D3+T  Datasheet	In Stock:13364 Inquiry	Inquiry