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| Design Example Report Title Specification Application Author Document Number Date Revision 10.5 W Multi Output Isolated Power Supply using TNY267P Input: 160V - 275VAC Output: 9V/400mA, 5V/800mA, 3.3V800mA Set Top Box Power Integrations Applications Department DER-55 April 20, 2005 1.0 Summary and Features This document is an engineering prototype report describing a Set Top Box power supply utilizing a TinySwitch-II TNY267. * * * * * Low Component Count No X-Cap No Common Mode Choke Good Cross Regulation Very Low No Load Losses The products and applications illustrated herein (including circuits external to the products and transformer construction) may be covered by one or more U.S. and foreign patents or potentially by pending U.S. and foreign patent applications assigned to Power Integrations. A complete list of Power Integrations' patents may be found at www.powerint.com. Power Integrations 5245 Hellyer Avenue, San Jose, CA 95138 USA. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 Table Of Contents Introduction................................................................................................................. 3 Power Supply Specification ........................................................................................ 4 Schematic................................................................................................................... 5 Circuit Description ...................................................................................................... 6 4.1 Input EMI Filtering ............................................................................................... 6 4.2 Primary Clamp Snubber ...................................................................................... 6 4.3 Output filtering..................................................................................................... 6 4.4 Output Feedback................................................................................................. 6 5 PCB Layout ................................................................................................................ 7 6 Bill Of Materials .......................................................................................................... 8 7 Transformer Specification........................................................................................... 9 7.1 Electrical Diagram ............................................................................................... 9 7.2 Electrical Specifications....................................................................................... 9 7.3 Materials.............................................................................................................. 9 7.4 Transformer Build Diagram ............................................................................... 10 7.5 Transformer Construction.................................................................................. 10 Transformer Spreadsheets.............................................................................................. 11 Performance Data ........................................................................................................... 13 7.6 Efficiency........................................................................................................... 13 7.7 Regulation ......................................................................................................... 14 7.7.1 Load ........................................................................................................... 14 7.7.2 Line ............................................................................................................ 14 7.7.3 Cross Regulation........................................................................................ 15 8 Thermal Performance............................................................................................... 16 9 Waveforms ............................................................................................................... 17 9.1 Drain Voltage and Current, Normal Operation .................................................. 17 9.2 Output Voltage Start-up Profile ......................................................................... 17 9.3 Drain Voltage and Current Start-up Profile........................................................ 18 9.4 Load Transient Response (75% to 100% Load Step) ....................................... 19 9.5 Output Ripple Measurements............................................................................ 20 9.5.1 Ripple Measurement Technique ................................................................ 20 9.5.2 Measurement Results ................................................................................ 21 10 Conducted EMI ..................................................................................................... 23 11 Revision History.................................................................................................... 25 Important Note: Although this board is designed to satisfy safety isolation requirements, the engineering prototype has not been agency approved. Therefore, all testing should be performed using an isolation transformer to provide the AC input to the prototype board. Design Reports contain a power supply design specification, schematic, bill of materials, and transformer documentation. Performance data and typical operation characteristics are included. Typically only a single prototype has been built. 1 2 3 4 Page 2 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 1 Introduction This document is an engineering prototype report describing a Set Top Box power supply utilizing a TinySwitch-II TNY267. This power supply is intended as a general purpose evaluation platform for TinySwitch-II. The document contains the power supply specification, schematic, bill of materials, transformer documentation, printed circuit layout, and performance data. Figure 1 - Populated Circuit Board Photograph. Page 3 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 2 Power Supply Specification Description Input Voltage Frequency No-load Input Power (230 VAC) Output Output Voltage 1 Output Ripple Voltage 1 Output Current 1 Output Voltage 2 Output Ripple Voltage 2 Output Current 2 Output Voltage 3 Output Ripple Voltage 3 Output Current 3 Total Output Power Continuous Output Power Peak Output Power Efficiency Environmental Conducted EMI Safety Surge Meets CISPR22B / EN55022B Designed to meet IEC950, UL1950 Class II Symbol VIN fLINE Min 160 47 Typ Max 275 64 0.3 Units VAC Hz W V mV mA V mV mA V mV mA W W % Comment 2 Wire - no P.E. 50/60 VOUT1 VRIPPLE1 IOUT1 VOUT2 VRIPPLE2 IOUT2 VOUT3 VRIPPLE3 IOUT3 POUT POUT_PEAK 9 50 100 5 50 20 3.3 50 300 800 10.5 10.5 800 400 6% 20 MHz Bandwidth 5% 20 MHz Bandwidth 5% 20 MHz Bandwidth Measured at POUT (10.5 W), 25 oC 6 kV Surge Ambient Temperature TAMB 6 0 50 kV o 1.2/50 s surge, IEC 1000-4-5, Series Impedance: Differential Mode: 2 Common Mode: 12 100 kHz ring wave, 500 A short circuit current, differential and common mode Free convection, sea level C Page 4 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 3 Schematic Figure 2 - Schematic Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 5 of 26 DER-55 TNY267 Multi Output Power Supply April 20, 2005 4 Circuit Description 4.1 Input EMI Filtering C10, and C13 are the bulk capacitors. Together with L4, they form the EMI filter. TinySwitch-II's built-in frequency jitter helps achieve low EMI in spite of this very simple EMI filter. 4.2 Primary Clamp Snubber D3, R1, R2, and C1 form the primary clamp snubber to clamp the voltage spike at the Drain pin after turn-off. D3 is a 1N4007G, a glass-passivated version of the standard 1N4007, with controlled reverse recovery. Its use, along with R2, improves EMI and efficiency. If a controlled recovery diode is not available, a fast diode must be used instead. 4.3 Output filtering C3, C5, and C7 are the main output capacitors. C4, C6, and C8, along with L1, L2, and L3, form second-stage output filters. 4.4 Output Feedback Sensing resistors R4 and R5 detect any variation in the amplitude of the 3.3V and 5V outputs. These changes, due to changes in the output load or input voltage, are sampled to the input pin of the TL431 shunt regulator. The shunt regulator compares these variations with its internal voltage reference and drives a feedback current trough U1B proportional to the to the variations detected by R4 and R5. Opto-coupler U1 closes the control loop of the supply by transferring the feedback current to the output of the EN/UV pin on the primary side of the circuit. Page 6 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 5 PCB Layout Figure 3 - Printed Circuit Layout Page 7 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 6 Bill Of Materials Item Qty Value Part Reference 1 1 1 nF C1 2 1 1 nF C2 3 1 220 uF C3 4 3 100 uF C4 C6 C8 5 2 470 uF C5 C7 6 2 10 uF C10 C13 7 2 100 nF C11 C12 8 1 SB360 D1 9 1 UF5401 D2 10 1 1N4007GP D3 11 4 1N4007 D4 D5 D7 D8 12 1 SB350 D6 13 1 3.15 A F1 14 3 3.3 uH L1 L2 L3 15 1 1500 uH L4 16 1 150 k R1 17 1 100R R2 18 1 200R R3 19 1 20 k R4 20 1 6.34 k R5 21 11 k R6 22 1 3.3 k R7 23 1 10 k R8 24 1 275 Vac RV1 25 1 EF20 T1 26 1 PC817A U1 27 1 TNY267P U2 28 1 TL431 U3 Description 1 nF, 1 kV, Disc Ceramic 1 nF, Ceramic, Y1 220 uF, 35 V, Electrolytic, Low ESR, 90 mOhm, (10 x 12.5) 100 uF, 16 V, Electrolytic, Gen. Purpose, (5 x 11) 470 uF, 35 V, Electrolytic, Low ESR, 52 mOhm, (10 x 20) 10uF, 400V, Electrolytic 100 nF, 50 V, Ceramic, X7R 60 V, 3 A, Schottky, DO-201AD 100 V, 3 A, Ultrafast Recovery, 50 ns, DO-201AD 1000 V, 1 A, Rectifier, Glass Passivated, 2 us, DO-41 1000 V, 1 A, Rectifier, DO-41 50 V, 3 A, Schottky, DO-201AD 3.15 A, 250V,Fast, TR5 3.3 uH, 2.66 A 1500 uH, 0.45 A 150 k, 5%, 1/2 W, Carbon Film 100 R, 5%, 1/8 W, Carbon Film 200 R, 5%, 1/8 W, Carbon Film 20 k, 1%, 1/4 W, Metal Film 6.34 k, 1%, 1/4 W, Metal Film 1 k, 5%, 1/8 W, Carbon Film 3.3 k, 5%, 1/8 W, Carbon Film 10 k, 1%, 1/4 W, Metal Film 275 V, 23 J, 7 mm, RADIAL Bobbin, EF20,(E20/10/6) Horizontal, 10 pins Opto coupler, 35 V, CTR 80-160%, 4-DIP TinySwitch-II, TNY267P, DIP-8B 2.495 V Shunt Regulator IC, 2%, 0 to 70C, TO-92 Mfg NIC Components Corp Vishay United Chemi-Con United Chemi-Con United Chemi-Con Panasonic Panasonic Vishay Vishay Vishay Vishay Vishay Wickman Toko Tokin Yageo Yageo Yageo Yageo Yageo Yageo Yageo Yageo Littlefuse Epcos Isocom, Sharp Power Integrations Texas Instruments Page 8 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 7 Transformer Specification 7.1 Electrical Diagram Balance 1i i Turn Copper Foil Core hi ld 18 Turns 2*0.28mm Heavy Nyleze (bifil ) Primary 59 Turns 0.28mm Heavy l NC 10 9V ii 2 Turns 1*0.40mm Triple 5V i 1 iTurn 2*0.40mm Triple 1 9 3 8 2 4 EF20 3V3 2i i Turns 3*0.40mm Triple 6/7 l d Figure 4 -Transformer Electrical Diagram 7.2 Electrical Specifications 1 second, 60 Hz, from Pins 2-4 to Pins 6-10 Pins 2-4, all other windings open, measured at 100 kHz, 0.4 VRMS Pins 2-4, all other windings open Pins 2-4, with Pins 6-10 shorted, measured at 100 kHz, 0.4 VRMS 3000 VAC 1340H, 0/+20% 950 kHz (Min.) 50 H (Max.) Electrical Strength Primary Inductance Resonant Frequency Primary Leakage Inductance 7.3 Materials Description 2 Core: PC40EF20-Z, TDK or equivalent Gapped for AL of 327 nH/T Bobbin: EF20 Horizontal 10 pin Magnet Wire: 0.28mm Triple Isolated Wire: 0.4mm Copper Foil: 0.1mm*12mm Tape: 3M 1298 Polyester Film, 2.0 mils thick, 12 mm wide Varnish Item [1] [2] [3] [4] [5] [6] [7] Page 9 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 7.4 Transformer Build Diagram 9V/5V/3.3V W inding PIN 6/7 PIN 9 PIN 10 PIN 8 Balance W inding PIN 1 PIN 2 Primary W inding PIN 4 PIN 3 PIN 1 Core Shield W inding Figure 5 - Transformer Build Diagram 7.5 Transformer Construction Core Shield Tape Primary Basic Insulation Balance Winding Insulation 9V, 5V and 3V3 Winding Outer Wrap Final Assembly Start at Pin1. Wind 14 bifilar turns of item [3] from left to right covering a single full layer. Finish at Pin3. 1 layer of item [6] for mechanical fixing. Start at Pin 4. Wind 59 turns of item [4] in 2 layers (about 32T in the first Layer and 27T in the second Layer) from left to right (Isolated with one layer tape item [6]). Finish on Pin2. 1 layer of item [6] for basic insulation. Start on pin 1 using item [5] at the start leads. Wind 1 turns of copper shield. Apply next step tape item [6] first before close this winding to avoid copper shortage. Use 2 layers of item [6] for basic insulation Start at Pin 10. Wind 2 turns of item [4] from right to left. Terminate on Pin 9. In the same layer start at Pin 9. Wind 1 bifilar turn of item [4] and terminate on Pin 6. Again in the same layer start at Pin 7. Wind 2 trifilar turns of item [4] and terminate on Pin 8. Wrap windings with 2 layers of tape item [6]. Assemble and secure core halves so that the tape wrapped EF core is at the bottom of the transformer. Varnish impregnate (item [7]). Page 10 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 Transformer Spreadsheets INPUT INFO ENTER APPLICATION VARIABLES VACMIN 160 VACMAX 270 fL 50 VO 5 PO 10.24 n 0.75 Z tC CIN 10 ENTER TinySwitch-II VARIABLES TinySwitch-II tny267 Chosen Device TNY267 ILIMITMIN ILIMITMAX fS fSmin fSmax 110 VOR VDS VD 0.6 KP OUTPUT UNIT Volts Volts Hertz Volts Watts 0.50 3.00 mSeconds uFarads Minimum AC Input Voltage Maximum AC Input Voltage AC Mains Frequency Output Voltage Output Power Efficiency Estimate Loss Allocation Factor Bridge Rectifier Conduction Time Estimate Input Filter Capacitor Universal Power Out 12W 0.42 Amps 0.48 Amps 132000.00 Hertz 120000.00 Hertz 144000.00 Hertz Volts 10.00 Volts Volts 1.14 115 Doubled/230V 19W TinySwitch-II Minimum Current Limit TinySwitch-II Maximum Current Limit TinySwitch-II Switching Frequency TinySwitch-II Minimum Switching Frequency (inc. jitter) TinySwitch-II Maximum Switching Frequency (inc. jitter) Reflected Output Voltage TinySwitch-II on-state Drain to Source Voltage Output Winding Diode Forward Voltage Drop Ripple to Peak Current Ratio (0.6 PC40EF20-Z * Core Effective Cross Sectional Area Core Effective Path Length Ungapped Core Effective Inductance Bobbin Physical Winding Width Safety Margin Width (Half the Primary to Secondary Creepage Distance) Number of Primary Layers Number of Secondary Turns DC INPUT VOLTAGE PARAMETERS VMIN VMAX CURRENT WAVEFORM SHAPE PARAMETERS DMAX IAVG IP IR IRMS TRANSFORMER PRIMARY DESIGN PARAMETERS LP NP ALG BM BAC ur LG BWE OD INS DIA AWG CM CMA Info 179.12 Volts 381.84 Volts Minimum DC Input Voltage Maximum DC Input Voltage 0.39 0.08 Amps 0.42 Amps 0.45 Amps 0.15 Amps Maximum Duty Cycle Average Primary Current Minimum Peak Primary Current Primary Ripple Current Primary RMS Current 1134.14 uHenries 58.93 326.60 nH/T^2 2763.39 Gauss 1381.69 Gauss 1674.52 0.10 mm 24.40 mm 0.41 mm 0.06 mm 0.35 mm 28.00 AWG 161.27 Cmils 1105.22 Cmils/Amp Primary Inductance Primary Winding Number of Turns Gapped Core Effective Inductance Maximum Flux Density, (BP<3100) AC Flux Density for Core Loss Curves (0.5 X Peak to Peak) Relative Permeability of Ungapped Core Gap Length (Lg > 0.1 mm) Effective Bobbin Width Maximum Primary Wire Diameter including insulation Estimated Total Insulation Thickness (= 2 * film thickness) Bare conductor diameter Primary Wire Gauge (Rounded to next smaller standard AWG value) Bare conductor effective area in circular mils CAN DECREASE CMA < 500 (decrease L(primary layers),increase NS,smaller Core) TRANSFORMER SECONDARY DESIGN PARAMETERS Lumped parameters Page 11 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 ISP ISRMS IO IRIPPLE CMS AWGS DIAS ODS INSS VOLTAGE STRESS PARAMETERS VDRAIN PIVS TNY267 Multi Output Power Supply 8.23 Amps 3.55 Amps 2.05 Amps 2.90 Amps 710.80 Cmils 21.00 AWG 0.73 mm 4.07 mm 1.67 mm April 20, 2005 Peak Secondary Current Secondary RMS Current Power Supply Output Current Output Capacitor RMS Ripple Current Secondary Bare Conductor minimum circular mils Secondary Wire Gauge (Rounded up to next larger standard AWG value) Secondary Minimum Bare Conductor Diameter Secondary Maximum Outside Diameter for Triple Insulated Wire Maximum Secondary Insulation Wall Thickness 632.84 Volts 24.44 Volts Maximum Drain Voltage Estimate (Includes Effect of Leakage Inductance) Output Rectifier Maximum Peak Inverse Voltage TRANSFORMER SECONDARY DESIGN PARAMETERS (MULTIPLE OUTPUTS) 1st output VO1 5 5.00 Volts Output Voltage (if unused, defaults to single output design) IO1 0.8 0.80 Amps Output DC Current PO1 4.00 Watts Output Power Output Diode Forward Voltage Drop VD1 0.60 Volts Output Winding Number of Turns NS1 3.00 Output Winding RMS Current ISRMS1 1.39 Amps Output Capacitor RMS Ripple Current IRIPPLE1 1.13 Amps Output Rectifier Maximum Peak Inverse Voltage PIVS1 24.44 Volts CMS1 AWGS1 DIAS1 ODS1 2nd output VO2 IO2 PO2 VD2 NS2 ISRMS2 IRIPPLE2 PIVS2 CMS2 AWGS2 DIAS2 ODS2 3rd output VO3 IO3 PO3 VD3 NS3 ISRMS3 IRIPPLE3 PIVS3 CMS3 AWGS3 DIAS3 ODS3 Total power 277.65 Cmils 25.00 AWG 0.46 mm 4.07 mm Output Winding Bare Conductor minimum circular mils Wire Gauge (Rounded up to next larger standard AWG value) Minimum Bare Conductor Diameter Maximum Outside Diameter for Triple Insulated Wire 3.3 0.8 0.6 Volts Amps 2.64 Watts Volts 2.09 1.39 Amps 1.13 Amps 16.84 Volts 277.65 Cmils 25.00 AWG 0.46 mm 5.84 mm Output Voltage Output DC Current Output Power Output Diode Forward Voltage Drop Output Winding Number of Turns Output Winding RMS Current Output Capacitor RMS Ripple Current Output Rectifier Maximum Peak Inverse Voltage Output Winding Bare Conductor minimum circular mils Wire Gauge (Rounded up to next larger standard AWG value) Minimum Bare Conductor Diameter Maximum Outside Diameter for Triple Insulated Wire 9 0.4 0.5 Volts Amps 3.60 Watts Volts 5.09 0.69 Amps 0.57 Amps 41.98 Volts 138.83 Cmils 28.00 AWG 0.32 mm 2.40 mm 10.24 Watts Output Voltage Output DC Current Output Power Output Diode Forward Voltage Drop Output Winding Number of Turns Output Winding RMS Current Output Capacitor RMS Ripple Current Output Rectifier Maximum Peak Inverse Voltage Output Winding Bare Conductor minimum circular mils Wire Gauge (Rounded up to next larger standard AWG value) Minimum Bare Conductor Diameter Maximum Outside Diameter for Triple Insulated Wire Total Output Power Page 12 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 Performance Data 7.6 Efficiency 0.8 0.75 0.7 Efficiency in % 0.65 0.6 0.55 0.5 0.45 0.4 150 170 190 210 230 250 270 290 Input Voltage in V Figure 6 - Efficiency vs. Input Voltage, Room Temperature, 50 Hz Page 13 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 7.7 Regulation TNY267 Multi Output Power Supply April 20, 2005 7.7.1 Load 3 2 Tolerance of NOM. Value in % 1 0 -1 0 -2 -3 -4 -5 Load Percent of NOM. Load in % 20 40 60 80 100 120 9V 5V 3V3 Figure 7 - Load Regulation, Room Temperature 7.7.2 Line 2 1 0 -1 150 -2 -3 -4 -5 Input Voltage in V -5 5V 3V3 Tolerance of Nom. Value in % 170 190 210 230 250 270 290 Figure 8 - Line Regulation, Room Temperature, Full Load Page 14 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 7.7.3 Cross Regulation TNY267 Multi Output Power Supply April 20, 2005 Min Load (X) Max Load (M) Load Combinations 9V 5V 3V3 XXX XXM XMX MXX XMM MXM MMX MMM Min (V) Max (V) % Below % Above 9V Rail (A) 0.1 0.4 Voltage (V) 9.1 9.52 9.29 8.78 9.67 9 8.95 9.12 8.78 9.67 -2.44 7.44 5V Rail (A) 0.02 0.8 Voltage (V) 4.95 5.17 4.73 4.93 4.81 5.06 4.74 4.81 4.73 5.17 -5.40 3.40 3V3 Rail (A) 0.3 0.8 Voltage (V) 3.29 3.21 3.36 3.29 3.32 3.24 3.35 3.31 3.21 3.36 -2.73 1.82 Page 15 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 8 Thermal Performance Temperature (C) Item Ambient 5V Output Diode 3.3V Output Diode Transformer (T1) TinySwitch (U2) 160 230 VAC VAC 50 62 64.2 65 85 50 66 67 68 86 275 VAC 50 68 68 69 89 Page 16 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 9 Waveforms 9.1 Drain Voltage and Current, Normal Operation Figure 9 - 160AC, Full Load. Upper: IDRAIN, 0.25 A / div Lower: VDRAIN, 200 V, 5 s / div Figure 10 - 275 VAC, Full Load Upper: IDRAIN, 0.25 A / div Lower: VDRAIN, 200 V / div 9.2 Output Voltage Start-up Profile Figure 11 - Start-up Profile, 160 VAC 5 ms / div. Upper: 5V Output, 2/ div Lower: 3V3 Output, 1/ div Figure 12 - Start-up Profile, 275 VAC 5 ms / div. Upper: 5V Output, 2/ div Lower: 3V3 Output, 1/ div Page 17 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 9.3 TNY267 Multi Output Power Supply April 20, 2005 Drain Voltage and Current Start-up Profile Figure 13 - 160 VAC Input and Maximum Load. Upper: IDRAIN, 0.5 A / div. Lower: VDRAIN, 200 V & 2 ms / div. Figure 14 - 275 VAC Input and Maximum Load. Upper: IDRAIN, 0.5 A / div. Lower: VDRAIN, 200 V & 2 ms / div. Page 18 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 9.4 Load Transient Response (75% to 100% Load Step) In the figures shown below, signal averaging was used to better enable viewing the load transient response. The oscilloscope was triggered using the load current step as a trigger source. Since the output switching and line frequency occur essentially at random with respect to the load transient, contributions to the output ripple from these sources will average out, leaving the contribution only from the load step response. Figure 15 - Transient Response, 230 VAC, 75-10075% Load Step (5V Output). Top: 5V Output Bottom: 3V3 Output 50 mV, 500 s / div. Figure 16 - Transient Response, 230 VAC, 75-10075% Load Step (3V3 Output) Upper: 5V Output Bottom: 3V3 Output 50 mV, 2 ms / div. Page 19 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 9.5 Output Ripple Measurements 9.5.1 Ripple Measurement Technique For DC output ripple measurements, a modified oscilloscope test probe must be utilized in order to reduce spurious signals due to pickup. Details of the probe modification are provided in Figure 17 and Figure 18. The 5125BA probe adapter is affixed with two capacitors tied in parallel across the probe tip. The capacitors include one (1) 0.1 F/50 V ceramic type and one (1) 1.0 F/50 V aluminum electrolytic. The aluminum electrolytic type capacitor is polarized, so proper polarity across DC outputs must be maintained (see below). Probe Ground Probe Tip Figure 17 - Oscilloscope Probe Prepared for Ripple Measurement. (End Cap and Ground Lead Removed) Figure 18 - Oscilloscope Probe with Probe Master 5125BA BNC Adapter. (Modified with wires for probe ground for ripple measurement, and two parallel decoupling capacitors added) Page 20 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 9.5.2 Measurement Results Figure 19 - Ripple, 160 VAC, Full Load. 9V Output 2 ms, 50 mV / div Figure 20 - 5 V Ripple, 275 VAC, Full Load. 9V Output 2 ms, 50 mV / div Figure 21 - Ripple, 160 VAC, Full Load. 5V Output 2 ms, 50 mV /div Figure 22 - 5 V Ripple, 275 VAC, Full Load. 5V Output 2 ms, 50 mV / div Page 21 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 Figure 23 - Ripple, 160 VAC, Full Load. 3V3 Output 2 ms, 50 mV /div Figure 24 - 5 V Ripple, 275 VAC, Full Load. 3V3 Output 2 ms, 50 mV / div Page 22 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 10 Conducted EMI Figure 25 - Conducted EMI, Maximum Steady State Load, 230 VAC, 50 Hz, and EN55022 B Limits Secondary Ground Floating Figure 26 - Conducted EMI, Maximum Steady State Load, 230 VAC, 50 Hz, and EN55022 B Limits Secondary Ground connected to Artificial Hand Page 23 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 Figure 27 - Conducted EMI, Maximum Steady State Load, 230 VAC, 50 Hz, and EN55022 B Limits Secondary Ground Floating (Without Y-Cap) Page 24 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 11 Revision History Date April 20, 2005 Author HM Revision 1.0 Description & changes Initial Release Reviewed VC / AM Page 25 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-55 TNY267 Multi Output Power Supply April 20, 2005 For the latest updates, visit our Web site: www.powerint.com Power Integrations may make changes to its products at any time. Power Integrations has no liability arising from your use of any information, device or circuit described herein nor does it convey any license under its patent rights or the rights of others. POWER INTEGRATIONS MAKES NO WARRANTIES HEREIN AND SPECIFICALLY DISCLAIMS ALL WARRANTIES INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS. PATENT INFORMATION The products and applications illustrated herein (including circuits external to the products and transformer construction) may be covered by one or more U.S. and foreign patents or potentially by pending U.S. and foreign patent applications assigned to Power Integrations. A complete list of Power Integrations' patents may be found at www.powerint.com. The PI Logo, TOPSwitch, TinySwitch, LinkSwitch, and EcoSmart are registered trademarks of Power Integrations. PI Expert and DPA-Switch are trademarks of Power Integrations. (c) Copyright 2004, Power Integrations. WORLD HEADQUARTERS Power Integrations 5245 Hellyer Avenue, San Jose, CA 95138, USA Main: +1-408-414-9200 Customer Service: Phone: +1-408-414-9665 Fax: +1-408-414-9765 e-mail: usasales@powerint.com AMERICAS Power Integrations, Inc. 4335 South Lee Street, Suite G, Buford, GA 30518, USA Phone: +1-678-714-6033 Fax: +1-678-714-6012 e-mail: usasales@powerint.com CHINA (SHENZHEN) Power Integrations International Holdings, Inc. Rm# 1705, Bao Hua Bldg. 1016 Hua Qiang Bei Lu, Shenzhen, Guangdong, 518031, China Phone: +86-755-8367-5143 Fax: +86-755-8377-9610 e-mail: chinasales@powerint.com GERMANY Power Integrations, GmbH Rueckertstrasse 3, D-80336, Munich, Germany Phone: +49-895-527-3910 Fax: +49-895-527-3920 e-mail: eurosales@powerint.com ITALY Power Integrations s.r.l. Via Vittorio Veneto 12, Bresso, Milano, 20091, Italy Phone: +39-028-928-6001 Fax: +39-028-928-6009 e-mail: eurosales@powerint.com JAPAN Power Integrations, K.K. Keihin-Tatemono 1st Bldg. 12-20 Shin-Yokohama, 2-Chome, Kohoku-ku, Yokohama-shi, Kanagawa 222-0033, Japan Phone: +81-45-471-1021 Fax: +81-45-471-3717 e-mail: japansales@powerint.com KOREA Power Integrations International Holdings, Inc. 8th Floor, DongSung Bldg. 17-8 Yoido-dong, Youngdeungpo-gu, Seoul, 150-874, Korea Phone: +82-2-782-2840 Fax: +82-2-782-4427 e-mail: koreasales@powerint.com SINGAPORE (ASIA PACIFIC HEADQUARTERS) Power Integrations, Singapore 51 Newton Road, #15-08/10 Goldhill Plaza, Singapore, 308900 Phone: +65-6358-2160 Fax: +65-6358-2015 e-mail: singaporesales@powerint.com TAIWAN Power Integrations International Holdings, Inc. 17F-3, No. 510, Chung Hsiao E. Rd., Sec. 5, Taipei, Taiwan 110, R.O.C. Phone: +886-2-2727-1221 Fax: +886-2-2727-1223 e-mail: taiwansales@powerint.com UK (EUROPE & AFRICA HEADQUARTERS) 1st Floor, St. James's House East Street Farnham, Surrey GU9 7TJ United Kingdom Phone: +44-1252-730-140 Fax: +44-1252-727-689 e-mail: eurosales@powerint.com CHINA (SHANGHAI) Power Integrations International Holdings, Inc. Rm 807, Pacheer, Commercial Centre, 555 Nanjing West Road, Shanghai, 200041, China Phone: +86-21-6215-5548 Fax: +86-21-6215-2468 e-mail: chinasales@powerint.com APPLICATIONS HOTLINE World Wide +1-408-414-9660 INDIA (TECHNICAL SUPPORT) Innovatech 261/A, Ground Floor 7th Main, 17th Cross, Sadashivanagar Bangalore, India, 560080 Phone: +91-80-5113-8020 Fax: +91-80-5113-8023 e-mail: indiasales@powerint.com APPLICATIONS FAX World Wide +1-408-414-9760 ER or EPR template - Rev 3.4 - Single sided Page 26 of 26 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com |
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