SWITCHMODE™ Power Supply Reference Manual

ForwardSMPSRMEvery new electronic product, except those that are battery powered, requires converting off–line115 Vac or 230 Vac power to some dc voltage for powering the electronics. The availability of designand application information and highly integrated semiconductor control ICs for switching powersupplies allows the designer to complete this portion of the system design quickly and easily.Whether you are an experienced power supply designer, designing your first switching powersupply or responsible for a make or buy decision for power supplies, the variety of informationin the SWITCHMODE Power Supplies Reference Manual and Design Guide should proveuseful.ON Semiconductor has been a key supplier of semiconductor products for switching power suppliessince we introduced bipolar power transistors and rectifiers designed specifically for switchingpower supplies in the mid–70’s. We identified these as SWITCHMODE products. A switchingpower supply designed using ON Semiconductor components can rightfully be called aSWITCHMODE power supply or SMPS.This brochure contains useful background information on switching power supplies for those whowant to have more meaningful discussions and are not necessarily experts on power supplies. It alsoprovides real SMPS examples, and identifies several application notes and additional designresources available from ON Semiconductor, as well as helpful books available from variouspublishers and useful web sites for those who are experts and want to increase their expertise. Anextensive list and brief description of analog ICs, power transistors, rectifiers and other discretecomponents available from ON Semiconductor for designing a SMPS are also provided. Thisincludes our newest GreenLine, Easy Switcher and very high voltage ICs (VHVICs), as well ashigh efficiency HDTMOS® and HVTMOS® power FETs, and a wide choice of discrete productsin surface mount packages.For the latest updates and additional information on analog and discrete products for power supply andpower management applications, please visit our website: (http://onsemi.com).MEGAHERTZ, POWERTAP, SENSEFET, SWITCHMODE, and TMOS are trademarks of Semiconductor Components Industries,LLC. HDTMOS and HVTMOS are registered trademarks of Semiconductor Components Industries, LLC.GreenLine, SMARTMOS and Motorola are trademarks of Motorola Inc.http://onsemi.com3