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
	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
	MC9S08QD4CSC	Company:NXP	Remark:IC MCU 8BIT 4KB FLASH 8SOIC	Package:SOIC8	MC9S08QD4CSC  Datasheet	In Stock:41393 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
	PM8110	Company:QUALCOMM	Remark:power-supply-charger-ic-chip-PM8110	Package:BGA	PM8110  Datasheet	In Stock:1833 Inquiry	Inquiry
	SS15P3S-M3/86A	Company:Vishay	Remark:DIODE SCHOTTKY 30V 15A TO277A	Package:TO-277, 3-PowerDFN	SS15P3S-M3/86A  Datasheet	In Stock:87640 Inquiry	Inquiry
	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
	A3P030-1QNG48I	Company:Microsemi	Remark:IC FPGA 34 I/O 48QFN	Package:48-VFQFN Exposed Pad	A3P030-1QNG48I  Datasheet	In Stock:146 Inquiry	Inquiry
	LM3S9B90-IQC80-C5	Company:Texas Instruments	Remark:IC MCU 32BIT 256KB FLASH 100LQFP	Package:LQFP-100	LM3S9B90-IQC80-C5  Datasheet	In Stock:2320 Inquiry	Inquiry
	MAX4507EAP	Company:Maxim Integrated	Remark:IC SIGNAL LINE PROTECTOR 20-SSOP	Package:20-SSOP (0.209", 5.30mm Width)	MAX4507EAP  Datasheet	In Stock:2254 Inquiry	Inquiry
	MR301-24	Company:NEC	Remark:	Package:DIP	MR301-24  Datasheet	In Stock:121 Inquiry	Inquiry