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AC/DC Switch Mode Power SupplyDesign Guidewww.fairchildsemi.com

AC/DC Switch Mode Power Supply Design GuideTable Of ContentsProduct InformationTotal Solutions.3Fairchild Power Switch (FPS ) .4-5Pulse Width Modulator (PWM) Controllers .6Power Factor Correction (PFC) Controllers.7Optocoupler Solutions .8Voltage References and Shunt Regulators .9High Voltage Switching Technologies.10Switch Mode Power Supply IGBTs.10High-Voltage MOSFETs .11Additional Discrete Components .12Design ExamplesExamples of Typical Application Circuits .13-221W Power Supply with less than 100mW Standby Power using FSD210 .13Dual Negative Output Non-Isolated Flyback using FSD200.1410W Single Output Isolated Flyback using FSDM0265RN and Zener Diode .1510W Multiple Output Isolated Flyback using FSD210 with Primary Side Regulation .162.5W Single Output Isolated Flyback using FSD200 with KA431 Reference.17180W-200W Quasi-Resonant Flyback with Input Power Factor Correction using KA5Q1265RF,FAN7527B, and FQP13N50C .18-1916W Multiple Output Isolated Flyback Converter using FSDM0265RN .2040W Isolated Flyback Power Supply using FSDM07652R .2124W Flyback Converter using 1500V IGBT and FAN7554 .22Design Ideas250W to 450W Desktop PC Forward Switch Mode Power Supply.23500W Telecom/Server Double Switch Forward Switch Mode Power Supply.24500W Telecom/Server ZVS Phase-Shift Full Bridge Switch Mode Power Supply .25Application Note HighlightsDesign Guidelines for Off-Line Flyback Converters using Fairchild Power Switch (FPS) – AN-4137 .26-27Power Factor Correction (PFC) Basics – AN-42047.28Choosing Power Switching Devices for SMPS Designs – AN-7010.29-30Global Power Resources Design Support .31www.fairchildsemi.com/acdc1

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AC/DC Switch Mode Power Supply Design GuideTotal SolutionsFairchild is the only semiconductor supplier that provides a complete portfolio for AC/DC switch mode power supplies.Whether your design is 1W or 1200W, Fairchild's solutions help achieve increased efficiency, reduce stand-by power,and support the industry's 1W initiatives. These solutions include: SuperFET technology that achieves world-classRDS(ON) and provides higher power density, reducing heat sink size, Green Fairchild Power Switch (FPS) that offersstate-of-the-art stand-by power supporting the industry's initiatives targeting less than 1W, and Power Factor CorrectionICs that decrease cost and increase system efficiency.SMPS IGBTsHigh Voltage MOSFETs Increase output power Reduce system cost Stealth Diode Co-Pack enhancesrecovery time 25% lower A * RDS(ON) minimizes system size100% Avalanche testedVoltage ranges from 60V to 1000VSuperFET offers best in class FOMPower Factor Correction (PFC) ControllersAdditional Discrete ComponentsVoltage References/Shunt Regulators Increase efficiency Increase usable PFC bandwidth andsimplifiy compensation Reduce ripple voltage and outputcapacitor size Reduce EMI and system noise Low-Voltage MOSFETs MOSFET and Schottky Combos Diodes and Rectifiers Bipolar Transistors and JFETs PFC Controlleror chMOSFETSwitchBridgeRectifierPWM ControllerTransformerFairchildPower SwitchOutputRectifieror MOSFETOptocouplerProgrammable output voltagesTemperature compensatedLow output noiseFast turn-on timeOutputFilterLoadVoltageReferenceOptically IsolatedError AmplifierPWM Controller Gr een c u r r en t m o d e r ed u c es p o w erc o n s u m p t i o n w i t h b u r s t m o d e o p er at i o n In t er n al s t ar t -u p s w i t c h Pr o g r am m ab l e s o f t s t ar t Ov er Vo l t ag e Pr o t ec t i o n (OVP)Optically Isolated Error AmplifierFairchild Power Switch (FPS) Green FPS reduces power consumption withburst mode operation Avalanche rated SenseFET Frequency modulation reduces EMI Built in soft startwww.fairchildsemi.com/acdc3 Single component solution vs. 2 components High isolation, 5,000V RMS Low tolerance results in easier design, fewercomponents Save board spaceOptocoupler MICROCOUPLER offers stable CTR up to 125 C Narrow Current Transfer Ratio (CTR) Multiple package types for ease of use

AC/DC Switch Mode Power Supply Design GuideFairchild Power Switch (FPS)Fairchild's FPS products are highly integrated off-line power switches with a fully avalanche rated SenseFET and acurrent mode PWM IC (see Burst Mode Operation figure below). The Green FPS products help reduce the system'sstand-by power to below 1Watt with the burst mode operation. Advanced burst mode operation supports 1W standby power regulations Integrated frequency modulation reduces EMI emissionsFPS Parallel Dice Solution(Side-by-Side)IpkFBVccGNDFPS Single Die Solution(BCDMOS)VFBGNDGNDGNDDrainVstr Various protection and control functions reduce Bill-of-Material costsPWMICSenseFETBurst Mode Operation Reduces Stand-ByPower to Less than formNormal NotSwitchingFrequency Modulation Reduces OverallElectromagnetic Interference (EMI)Peak Level LimitPeak Level LimitPeak WaveformQuasi Peak Waveform100kHz100kHz onFSD210FSD210EMI reduction can be accomplished by modulating the switching frequency of a SMPS.Frequency modulation can reduce EMI by spreading the energy over a wider frequency range.www.fairchildsemi.com/acdc4

AC/DC Switch Mode Power Supply Design GuideFairchild Power Switch (FPS)Green FPSPartNumberApplicationPO(max) (W)85-265VACPO(max) (W)230VAC 15%Peak Current HV-FET RatingLimit (A)(V)RDS(ON) max (Ω)SwitchingFrequency (V)FrequencyMod. (kHz)PackageTO220-5LFSCM0565RCSTB, LCD Monitor70852.56502.266YesFSCM0565RDSTB, LCD Monitor50652.56502.266YesD2PAK-5LFSCM0765RCSTB, LCD Monitor859536501.666YesTO220-5LFSCM0765RDSTB, LCD Monitor607036501.666YesD2PAK-5LFSCQ0765RTCTV, DVD, Audio , DVD, Audio V, DVD, Audio TCTV, DVD, Audio Electronics17021086500.65QRCNoTO220F-5LFSD1000PC Main Aux , LCD1213.6Adjustable700970NoDIPH-12FSD200BCharger, Aux Power570.370032134YesLSOP-7FSD200BMCharger, Aux Power570.370032134YesDIP-7FSD210BCharger, Aux Power570.370032134YesDIP-7FSD210BMCharger, Aux Power570.370032134YesLSOP-7FSDH0265RLDVDP, STB, Fax, Printer,Scanner, Adapters20271.56506100YesLSOP-8FSDH0265RNDVDP, STB, Fax, Printer,Scanner, Adapters20271.56506100YesDIP-8PC Aux, STB, DVD,12170.765019100YesDIP-8PC Aux, STB, , STB, Printer, Fax,Scanner, Adapters12231.26501050YesLSOP-8FSDL0165RNDVDP, STB, Printer, Fax,Scanner, Adapters12231.26501050YesDIP-8FSDL0365RLDVDP, STB, Printer, DM0265RNB DVDP, STB, Fax, Printer,Scanner, Adapters20271.5650667YesDIP-8FSDM0365RLDVDP, STB, Fax, Printer,Scanner, Adapters24302.156504.567YesLSOP-8FSDM0365RNB DVDP, STB, Fax, Printer,Scanner, H321LScanner, AdaptersFSDL0365RNBDVDP, STB, Printer, Fax,Scanner, AdaptersFSDL321PC Aux, STB, DVD,AdaptersFSDL321LPC Aux, STB, DVD,AdaptersFSDM0565RBLCD ,STB, Adapters48562.36502.266NoTO220F-6LFSDM07652RBLCD ,STB, Adapters56642.56501.666NoTO220F-6LFSDM311Aux Power, Adapters12200.556501970NoDIP-8FSDM311LAux Power, om/acdc5

AC/DC Switch Mode Power Supply Design GuidePulse Width Modulator (PWM) ControllersSimilarly to Green FPS, the FAN7601, FAN7602, and 7610 are green PWM controllers, offering burst mode operationduring stand-by mode allowing the design to meet the International Energy Agency's (IEA) "1-Watt Initiative". Burst mode operation Operating frequency of up to 300kHz Operating current 4mA (max) Programmable soft start 20mSBurst Mode Operation DiagramVOBurst mode operation: In order to minimize the power dissipationin standby mode, the Green PWMs implement burst modefunctionality. As the load decreases, the feedback voltagedecreases. As shown in the figure, the device automatically entersburst mode when the feedback voltage drops below VBURL. At thispoint switching stops and the output voltages start to drop at arate dependent on standby current load. This causes the feedbackvoltage to rise. Once it passes VBURH switching starts again. Thefeedback voltage falls and the process repeats. Burst mode operationalternately enables and disables switching of the power MOSFETthereby reducing switching loss in standby mode.VFHVBURHVBURLIdsVdsTimePWM ControllersPartNumberNumber ofOutputsControlModeSwitchingFrequency (kHz)Supply VoltageMax (V)Output CurrentMax (A)DutyRatio ageStartupCurrent (µA)30198200SO-8200.2598Internal SwitchDIP-8, SO-8, SSOP-1065200.2575Internal SwitchDIP-8, SO-8, SSOP-10QRC200.5–Internal SwitchDIP-14, geKA3842A1Current500301100200DIP-8, SO-14KA3842B1Current500301100450DIP-8, SO-14KA3843A1Current500301100200DIP-8, SO-14KA3843B1Current500301100450DIP-8, SO-14KA3844B1Current50030150450DIP-8, 8KA7500C2Voltage300420.25–1000DIP-16, P-16ML48231Voltage100030–801100DIP-16, SO-16NOTE: FAN7602 and FAN7610 under development*Burst Mode Operation reduces system standby power to 1W or lesswww.fairchildsemi.com/acdc6

AC/DC Switch Mode Power Supply Design GuidePower Factor Correction (PFC) Standalone and PFC/PWM Combo ControllersFairchild’s full line of both stand alone PFC controllers and PFC/PWM combo controllers offer crucial cost-and energysaving solutions that address the demanding requirements of a diverse range of medium-and high-power Switch ModePower Supply (SMPS) designs. Offerings include both continuous/discontinuous devices Current fed gain modulator for improved noise immunity Synchronized clock output to reduce system noise and to synchronize to downstream converter Patented one-pin voltage error amplifier with advanced 2012000060VINIIN7VIN1IINBefore Power Factor 00After Power Factor CorrectedSimplified Application CircuitsDC VOUTAC VINAC VINDC ouplerReferenceStand-Alone PFC ControllersPFC/PWM Combo ControllersPower Factor Correction Stand-Alone ControllersPartNumberPFC ControlOperating Current(mA)Startup Current(µA)PackageFAN7527BDiscontinuous Mode360DIP-8, SOP-8FAN7528Discontinuous Mode2.540DIP-8, SOP-8KA7524BDiscontinuous Mode6250DIP-8, SOP-8KA7525BDiscontinuous Mode4200DIP-8, SOP-8KA7526Discontinuous Mode4300DIP-8, SOP-8ML4821Average Current Mode26600DIP-18, SOIC-20FAN4810Average Current Mode5.5200DIP-16, SOIC-16FAN4822Average Current Mode22700DIP-14, SOIC-16Fpwm OverFpfcOperating Current(mA)PWM Duty CycleMax (%)Power Factor Correction Combo ControllersPartNumberFAN4800PFC ControlStartup Current(µA)PackageAverage Current Mode15.549200DIP-16, SOIC-16FAN4803-1Input CurrentShaping Mode12.550200DIP-8, SOIC-8FAN4803-2Input CurrentShaping Mode22.550200DIP-8, SOIC-8ML4824-1Average Current Mode11650700DIP-16, SOIC-16ML4824-2Average Current Mode21645700DIP-16, SOIC-16ML4826Average Current Mode22250700DIP-20www.fairchildsemi.com/acdc7

AC/DC Switch Mode Power Supply Design GuideOptocoupler SolutionsThe MICROCOUPLER package platform of optocouplers reduces board space and offers stable CTR up to 125 C,while offering high input to output isolation voltages. High Current Transfer Ratio, CTR at low IF Operating Temperature Range, Top

AC/DC Switch Mode Power Supply Design Guide Similarly to Green FPS, the FAN7601, FAN7602, and 7610 are green PWM controllers, offering burst mode operation during stand-by mode allowing the design to meet the International Energy Agency's (IEA) "1-Watt Initiative". Burst mode operation Operating frequency of up to 300kHz Operating current 4mA (max) Programmable soft start 20mS .