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
	MC33880PEW	Company:NXP / Freescale	Remark:IC SRL SWITCH OCT W/SPI 32SOIC	Package:32-SOIC (0.295", 7.50mm Width)	MC33880PEW  Datasheet	In Stock:1064 Inquiry	Inquiry
	RC0603FR-071KL	Company:Yageo	Remark:RES SMD 1K OHM 1% 1/10W 0603	Package:SMD	RC0603FR-071KL  Datasheet	In Stock:39061200 Inquiry	Inquiry
	XC6SLX100-N3FGG676I	Company:Xilinx Inc.	Remark:IC FPGA 480 I/O 676FBGA	Package:FBGA	XC6SLX100-N3FGG676I  Datasheet	In Stock:82 Inquiry	Inquiry
	UPSD3212CV-24U6	Company:STMicroelectronics	Remark:IC MCU 8BIT 80KB FLASH 80TQFP	Package:TQFP80	UPSD3212CV-24U6  Datasheet	In Stock:1200 Inquiry	Inquiry
	DS1816R-5+T&R	Company:Maxim Integrated	Remark:IC 3.06V OD 5% SOT23-3	Package:TO-236-3, SC-59, SOT-23-3	DS1816R-5+T&R  Datasheet	In Stock:7060 Inquiry	Inquiry
	1N4148W-7-F	Company:Diodes Incorporated	Remark:DIODE GEN PURP 100V 300MA SOD123	Package:SOD-123	1N4148W-7-F  Datasheet	In Stock:5270000 Inquiry	Inquiry
	FLC10-200H	Company:STMicroelectronics	Remark:IC FIRE LIGHTER CIRCUIT I-PAK	Package:TO-251-3 Long Leads, IPak, TO-251AB	FLC10-200H  Datasheet	In Stock:5153 Inquiry	Inquiry
	RD0306T-H	Company:ON Semiconductor	Remark:DIODE GEN PURP 600V 3A TP	Package:TO-251-3 Long Leads, IPak, TO-251AB	RD0306T-H  Datasheet	In Stock:6530 Inquiry	Inquiry
	70V7599S166BCI8	Company:IDT	Remark:SRAM 128K x 36 Synchronous Bank-Switchable Dual-Port SRAM	Package:	70V7599S166BCI8  Datasheet	In Stock:2 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