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Design Example Report
Title Specification Application Author Document Number Date Revision 10W Compact Power Supply using TOP245R Input: 90 - 300 VAC Output: 6V / 1.67A Water Purifier Power Integrations Applications Department DER-107 October 26, 2005 1.0
Summary and Features * * * * * * * 66kHz operation to reduce switching losses in TOPSwitch-GX, reduce standby power consumption and reduce burden on input EMI Filter Low profile EFD20 ESHEILD transformer construction Simple input -filter No Y-cap No X-cap 450 VDC input capacitors for increased reliability for continuous 300 VRMS operation No heat sink design - D2PAK TOPSwitch-GX and D-PAK output rectifier 10 W (continuous) / 18 W (peak) in 1.6 X 2.5 X 1"
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-107
10 W Compact Power Supply
October 26, 2005
Table Of Contents
1 2 3 4 Introduction................................................................................................................. 3 Power Supply Specification ........................................................................................ 4 Schematic................................................................................................................... 5 Circuit Description ...................................................................................................... 6 4.1 Input EMI Filtering ............................................................................................... 6 4.2 TOPSwitch Primary ............................................................................................. 6 4.3 Output Rectification ............................................................................................. 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 8 PIXL Transformer Spreadsheet................................................................................ 11 9 Performance Data .................................................................................................... 15 9.1 Efficiency........................................................................................................... 15 9.2 No-load Input Power.......................................................................................... 15 9.3 Regulation ......................................................................................................... 16 9.3.1 Load ........................................................................................................... 16 9.3.2 Line ............................................................................................................ 16 10 Waveforms............................................................................................................ 17 10.1 Drain Voltage and Current, Normal Operation .................................................. 17 10.2 Output Voltage Start-up Profile at Full Load...................................................... 17 10.3 Drain Voltage and Current Start-up Profile........................................................ 18 10.4 Load Transient Response (Load Step).............................................................. 19 10.5 Output Ripple Measurements............................................................................ 20 10.5.1 Ripple Measurement Technique ................................................................ 20 10.5.2 Measurement Results ................................................................................ 21 11 Control Loop Measurements................................................................................. 22 11.1 120 VAC Maximum and 3A Load ...................................................................... 22 11.2 240 VAC Maximum and 3A Load ...................................................................... 23 12 Conducted EMI ..................................................................................................... 24 13 Revision History .................................................................................................... 25
Important Notes: 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 isolated source to provide power 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.
Page 2 of 26
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DER-107
10 W Compact Power Supply
October 26, 2005
1 Introduction
This document is an engineering report describing a universal input 6 V / 10 W power supply utilizing a TOP245R. This power supply is intended to be used in a compact adapter for a water purification application. This supply has been design to operate at 300 VAC input continuously as well as provide a peak output current of 3 A for two minutes. The document contains the power supply specification, schematic, bill-of-materials, transformer documentation, printed circuit layout, and performance data.
Top
Bottom
Figure 1 - Populated Circuit Board Photograph
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DER-107
10 W Compact Power Supply
October 26, 2005
2 Power Supply Specification
Description Input Voltage Frequency No-load Input Power (240 VAC) Output Output Voltage 1 Output Ripple Voltage 1 Output Current 1 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 90 47
Typ
Max 300 64 0.5
Units VAC Hz W V mV A
Comment
2 Wire - no P.E.
50/60
VOUT1 VRIPPLE1 IOUT1 POUT POUT_PEAK
6 100 1.67 10 18 75
5% 20 MHz bandwidth
W W %
2 minute duration Measured at POUT (10 W), 25 oC
4
kV
Surge Ambient Temperature TAMB
4 0 40
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
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DER-107
10 W Compact Power Supply
October 26, 2005
3 Schematic
Figure 2 - Schematic
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DER-107
10 W Compact Power Supply
October 26, 2005
4 Circuit Description
The schematic in Figure 2 shows an off-line Flyback converter using the TOP245R. The circuit is designed for 90 VAC to 300 VAC input and 6 V, 1.67 A output, with a transient load requirement of 3 A for 2 minutes in duration. 4.1 Input EMI Filtering Capacitor C1, C2 and L1 form in input p-filter for differential-mode conducted EMI. Common-mode conducted EMI is reduced with the ESHIELD winding technique employed in the transformer construction. A input X-capacitor and a Y-capacitor to bridge the isolation barrier are not required, due to the ESHIELD transformer construction and frequency dithering of the TOPSwitch-GX. 4.2 TOPSwitch Primary Rectifier bridge BR1 and C1, C2 provide a high voltage DC BUS for the primary circuitry. The DC rail is applied to the primary winding of T2. The other side of the transformer primary is driven by the integrated MOSFET in U1. Diode D4, R7, R3 and C6 clamp leakage spikes generated when the MOSFET in U1 switches off. Resistor R8 sets the low-line turn-on threshold to approximately 69 VAC, and also sets the over-voltage shutdown level to approximately 320 VAC. R2 sets the U1 current limit to approximately 75% of its nominal value. This limits the output power delivered during fault conditions. C5 bypasses the U1 CONTROL pin. C4 has 3 functions. It provides the energy required by U1 during startup, sets the auto-restart frequency during fault conditions, and also acts to roll off the gain of U1 as a function of frequency. R1 adds a zero to stabilize the power supply control loop. Diode D3 and C12 provide rectified and filtered bias power for U3 and U1. The Frequency pin (F-pin) of U1 is tied to the Control pin (C-pin) to set the operating frequency of the U1 to 66kHz. 4.3 Output Rectification The output of T2 is rectified and filtered by D6, C9, and C10. Inductor L2 and C11 provide additional high frequency filtering. 4.4 Output Feedback Resistors R9 and R10 divide down the supply output voltage and apply it to the reference pin of error amplifier U2. Shunt regulator U2 drives optocoupler U3 through resistor R12 to provide feedback information to the U1 CONTROL pin. The optocoupler output also provides power to U1 during normal operating conditions. Components C4, C13, R1, R11, and R12 all play a role in compensating the power supply control loop. Capacitor C4 rolls off the gain of U1 at relatively low frequency. Resistor R1 provides a zero to cancel the phase shift of C4. Resistor R12 sets the gain of the direct signal path from the supply output through U2 and U3. Components C13 and R11 roll off the gain of U2.
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DER-107
10 W Compact Power Supply
October 26, 2005
5 PCB Layout
Figure 3 - Printed Circuit Layout
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DER-107
10 W Compact Power Supply
October 26, 2005
6 Bill Of Materials
Item QTY Ref Des Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 1 2 1 2 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 BR1 C4 C6 C11 C12 D3 D4 D6 F1 L1 L2 R1 R2 R3 R7 R8 R9 R10 R11 R12 RV1 T2 U1 U2 U3 600 V, 1 A, Bridge Rectifier, SMD, DFS 47 uF, 16 V, Electrolytic, Gen. Purpose, (5 x 11) 2.2 nF, 1 kV, Disc Ceramic 100 uF, 10 V, Electrolytic, Low ESR, 500 mOhm, (5 x 11.5) 10 uF, 50 V, Electrolytic, Gen. Purpose, (5 x 11) 200 V, 300 mA, Fast Switching, DO-35 1000 V, 1 A, Rectifier, Glass Passivated, SMA 60 V, 6 A, Schottky, SMD, DPAK 3.15 A, 250V, Slow, TR5 1000 uH, 0.28 A 3.3 uH, 5.5 A, 8.5 x 11 mm 6.8 R, 5%, 0805 13.7 k, 1%, 0805 200 k, 5%, 1 W, Metal Oxide 75 R, 5%, 1/8 W, Metal Film, 0805 2.2 M, 5%, 1/4 W, Carbon Film 6.65 k, 1%, 1/4 W, Metal Film, 1206 4.75 k, 1%, 1/4 W, Metal Film, 1206 3.3 k, 5%, 1/8 W, Metal Film, 0805 100 R, 1%, 1/8 W, Metal Film, 0805 300 V, 23 J, 7 mm, RADIAL Bobbin, EFD20, Horizontal, 8 pins TOPSwitch-GX, TOP245R, TO-263-7C 2.495 V Shunt Regulator IC, 1%, -40 to 85C, SOT23 Opto coupler, 35 V, CTR 80-160%, 4-DIP C1 C2 22 uF, 450 V, Electrolytic, 105C (16 x 25) C5 C13 100 nF, 50 V, Ceramic, X7R C9 C10 560 uF, 25 V, Electrolytic, Very Low ESR, 29 mOhm, (8 x 20) Value DFS06 22 uF 47 uF 100 nF 2.2 nF 560 uF 100 uF 10 uF BAV21 S1M 6CWQ06 FUSE 1mH 3.3uH 6.8 13.7 k 200 k 75 2.2 M 6.65 k 4.75 k 3.3 k 100 VARISTOR Littlefuse BEFD20_8P/Yih-Hwa Enterprises TOP245R LM431 PC817A Power Integrations National Semiconductor Isocom, Sharp V300LA4 YW-272-03B TOP245R LM431BCM ISP817A, PC817X1 Yageo RSF200JB-200K Mfg Vishay Nichicon United Chemi-Con Panasonic NIC Components Corp Rubycon United Chemi-Con United Chemi-Con Vishay Vishay IR Wickman Tokin Toko Mfg Part Number DFS06 UVZ2W220MHD KME16VB47RM5X11LL ECU-S1H104KBB NCD222K1KVY5F 1EZLH560K8X20 LXZ10VB101ME11LL KMG50VB10RM5X11LL BAV21 S1M 6CWQ06 3821315041 SBC3-102-281 R622LY-3R3M
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DER-107
10 W Compact Power Supply
October 26, 2005
7 Transformer Specification
7.1 Electrical Diagram
Figure 4 - Transformer Electrical Diagram
7.2
Electrical Specifications
1 second, 60 Hz, from Pins 1-4 to Pins 5-8 Pins 3-4, all other windings open, measured at 100 kHz, 0.4 VRMS Pins 3-4, all other windings open Pins 3-4, with Pins 5-8 shorted, measured at 100 kHz, 0.4 VRMS 3000 VAC 606 H, -7/+7% 800 kHz (Min.) 100 H (Max.)
Electrical Strength Primary Inductance Resonant Frequency Primary Leakage Inductance
7.3
Materials
Description Core: EFD20/3F3 AL = 104nH/T Bobbin: 8-pin Magnet Wire: #35 AWG Heavy Build Magnet Wire: #27 AWG Heavy Build Tape: 3M 3mm wide Tape, 3M Tape, 3M Copper tape 1.5 mil thick X 8mm wide Varnish
2
Item [1] [2] [3] [4] [5] [6] [7] [8] [9]
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DER-107
10 W Compact Power Supply
October 26, 2005
7.4
Transformer Build Diagram
Figure 5 - Transformer Build Diagram
7.5
Transformer Construction
Bobbin Preparation Primary Margin Primary Basic Insulation Bias Winding Basic Insulation Primary Margin Balanced Shield Winding Reinforced Insulation Secondary Margin Secondary Winding Outer Wrap Core Preparation Outer Belly band Final Assembly
Align bobbin to have pins 1-4 facing the mandrill Apply 3 mm wide margin on either side of bobbin with item [5]. Match height of primary and bias windings. Start at Pin 3. Wind 76 turns of item [3] in approximately 2 layers, finish on Pin 4. Use one layer of item [6] for basic insulation. Starting at Pin 2, wind 14 turns of item [3] uniformly across bobbin width in a single layer. Finish at Pin 1. Use one layer of item [6] for basic insulation. Apply 3 mm wide margin on either side of bobbin with item [5]. Match height of balanced shield winding. Start temporarily on pin 6. Wind 4 turns of quadrifilar item [4] uniformly across the bobbin width in a single layer. Finish on pin 4. Cut start of winding at 90-degree bend to center of bobbin window. Use three layers of item [7] for reinforced insulation. Apply 3 mm wide margin on either side of bobbin with item [5]. Match height of secondary winding. Start at Pin 5. Wind 6 trifilar turns of item [4]. Spread turns evenly across bobbin in a single layer. Finish on Pin 8. Wrap windings with 3 layers of tape (item [7]). Affix cores (item [1]) with tape [5]. Wrap one turn of copper tape [8] around outer core. Ensure copper tape makes contact with core halves. Solder wire from pin 2 of bobbin to copper bellyband. Wrap three layers of tape [7]. Varnish impregnate (item [9]).
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DER-107
10 W Compact Power Supply
October 26, 2005
8 PIXL Transformer Spreadsheet
ACDC_TOPSwitchGX_113004; Rev.2.2; Copyright Power Integrations Inc. 2004
INPUT
INFO
OUTPUT
UNIT
TOP_GX_FX_113004.xls: TOPSwitch-GX/FX Continuous/Discontinuous Flyback Transformer Design Spreadsheet
ENTER APPLICATION VARIABLES VACMIN 85 VACMAX 300 fL 50 VO 6 PO 18 n 0.73 Z 0.5 VB 15 tC 3 CIN ENTER TOPSWITCH-GX VARIABLES
TOP-GX Chosen Device KI
Volts Volts Hertz Volts Watts
Volts mSeconds uFarads
44
Maximum AC Input Voltage AC Mains Frequency Output Voltage Output Power Efficiency Estimate Loss Allocation Factor Bias Voltage Bridge Rectifier Conduction Time Estimate Input Filter Capacitor
TOP245
TOP245 0.8 1.296 1.584 h 66000 61500 70500 82 10 0.5 0.7 0.9415 Power Out
Universal 60W
115 Doubled/230V 85W External Ilimit reduction factor (KI=1.0 for default ILIMIT, KI <1.0 for lower ILIMIT) Use 1% resistor in setting external ILIMIT Use 1% resistor in setting external ILIMIT Half (H) frequency option 66kHz TOPSwitch-GX Switching Frequency: Choose between 132 kHz and 66 kHz TOPSwitch-GX Minimum Switching Frequency TOPSwitch-GX Maximum Switching Frequency Reflected Output Voltage TOPSwitch on-state Drain to Source Voltage Output Winding Diode Forward Voltage Drop Bias Winding Diode Forward Voltage Drop Ripple to Peak Current Ratio (0.4 < KRP < 1.0 : 1.0< KDP<6.0)
ILIMITMIN ILIMITMAX Frequency (F)=132kHz, (H)=66kHz fS fSmin fSmax VOR VDS VD VDB KP
Amps Amps
Hertz Hertz Hertz Volts Volts Volts Volts
ENTER TRANSFORMER CORE/CONSTRUCTION VARIABLES
Core Type Core
efd20
EFD20 P/N:
EFD20-3F3
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DER-107
Bobbin
10 W Compact Power Supply
EFD20_BOBBIN 0.58 5.7 1800 16.4 3 2 6 0.58 5.7 1800 16.4 P/N: cm^2 cm nH/T^2 mm mm
October 26, 2005
CSH-EFD20-1S-8P 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
AE LE AL BW M L NS DC INPUT VOLTAGE PARAMETERS VMIN VMAX
81 424
Volts Volts
Minimum DC Input Voltage Maximum DC Input Voltage
CURRENT WAVEFORM SHAPE PARAMETERS DMAX IAVG IP IR IRMS TRANSFORMER PRIMARY DESIGN PARAMETERS LP NP NB ALG BM BP BAC ur LG BWE OD INS DIA AWG CM CMA Warning
0.54 0.30 1.07 1.01 0.47 606 76 14 106 1480 2187 696 1408 0.65 20.8 0.27 0.05 0.22 32 64 137
Amps Amps Amps Amps uHenries
Maximum Duty Cycle Average Primary Current Peak Primary Current Primary Ripple Current Primary RMS Current Primary Inductance Primary Winding Number of Turns Bias Winding Number of Turns Gapped Core Effective Inductance Maximum Flux Density at PO, VMIN (BM<3000) Peak Flux Density (BP<4200) 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 !!!!!!!!!! INCREASE CMA>200
(increase L(primary layers),decrease NS, larger Core)
nH/T^2 Gauss Gauss Gauss
mm mm mm mm mm AWG Cmils Cmils/Amp
TRANSFORMER SECONDARY DESIGN PARAMETERS (SINGLE OUTPUT EQUIVALENT) Lumped parameters Peak Secondary Current ISP 13.52 Amps
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DER-107
ISRMS IO IRIPPLE CMS AWGS DIAS ODS INSS VOLTAGE STRESS PARAMETERS VDRAIN PIVS PIVB
10 W Compact Power Supply
5.48 3.00 4.59 1097 19 0.91 1.73 0.41 Amps Amps Amps Cmils AWG mm mm mm
October 26, 2005
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
616 40 96
Volts Volts Volts
Maximum Drain Voltage Estimate (Includes Effect of Leakage Inductance) Output Rectifier Maximum Peak Inverse Voltage Bias Rectifier Maximum Peak Inverse Voltage
TRANSFORMER SECONDARY DESIGN PARAMETERS (MULTIPLE OUTPUTS) 1st output VO1 6.0 6 Volts IO1 3.000 3 Amps PO1 18.00 Watts VD1 0.5 0.5 Volts NS1 ISRMS1 IRIPPLE1 PIVS1 CMS1 AWGS1 DIAS1 ODS1 2nd output VO2 IO2 PO2 VD2 NS2 6.00 5.484 4.59 40 1097 19 0.91 1.73 Amps Amps Volts Cmils AWG mm 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
6.0 1.670 10.02 0.5 6.00
Volts Amps Watts Volts
Output Voltage Output DC Current Output Power Output Diode Forward Voltage Drop Output Winding Number of Turns
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DER-107
ISRMS2 IRIPPLE2 PIVS2 CMS2 AWGS2 DIAS2 ODS2
10 W Compact Power Supply
3.053 2.56 40 611 22 0.65 1.73 Amps Amps Volts Cmils AWG mm mm
October 26, 2005
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
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DER-107
10 W Compact Power Supply
October 26, 2005
9 Performance Data
All measurements performed at room temperature, 60 Hz input frequency. 9.1 Efficiency
Figure 6 - Efficiency vs. Input Voltage, Room Temperature, 60 Hz.
9.2
No-load Input Power
Figure 7 - Zero Load Input Power vs. Input Line Voltage, Room Temperature, 60 Hz
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DER-107 9.3 Regulation
10 W Compact Power Supply
October 26, 2005
9.3.1 Load
Figure 8 - Load Regulation, Room Temperature
9.3.2 Line
Figure 9 - Line Regulation, Room Temperature, Full Load
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DER-107
10 W Compact Power Supply
October 26, 2005
10 Waveforms
10.1 Drain Voltage and Current, Normal Operation
Figure 10 - 90 VAC, Full Load. Upper: IDRAIN, 0.5 A / div Lower: VDRAIN, 100 V, 2 s / div
Figure 11 - 265 VAC, Full Load Upper: IDRAIN, 0.5 A / div Lower: VDRAIN, 200 V / div
10.2 Output Voltage Start-up Profile at Full Load
Figure 12 - Start-up Profile, 120VAC 1 V, 2 ms / div.
Figure 13 - Start-up Profile, 240 VAC 1 V, 2 ms / div.
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DER-107
10 W Compact Power Supply
October 26, 2005
10.3 Drain Voltage and Current Start-up Profile
Figure 14 - 90 VAC Input and Maximum Load. Upper: IDRAIN, 0.5 A / div. Lower: VDRAIN, 100 V & 1 ms / div.
Figure 15 - 265 VAC Input and Maximum Load. Upper: IDRAIN, 0.5 A / div. Lower: VDRAIN, 200 V & 1 ms / div.
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DER-107
10 W Compact Power Supply
October 26, 2005
10.4 Load Transient Response (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 16 - Transient Response, 120 VAC, 75-10075% Load Step. Bottom: Load Current, 1 A/div. Top: Output Voltage 2000 mV, 5V offset, 1ms / div.
Figure 17 - Transient Response, 120 VAC, 100-180100% Load Step Bottom: Load Current, 1 A/ div. Top: Output Voltage 200 mV 5V offset, 1 ms / div.
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DER-107
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October 26, 2005
10.5 Output Ripple Measurements 10.5.1 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 18 and Figure 19. 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 18 - Oscilloscope Probe Prepared for Ripple Measurement. (End Cap and Ground Lead Removed)
Figure 19 - Oscilloscope Probe with Probe Master 5125BA BNC Adapter. (Modified with wires for probe ground for ripple measurement, and two parallel decoupling capacitors added)
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DER-107
10 W Compact Power Supply
October 26, 2005
10.5.2 Measurement Results
Figure 20 - Ripple, 120VAC, Full Load. 2 ms, 20 mV / div
Figure 21 - Ripple, 240VAC, Full Load. 2 ms, 20 mV / div
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DER-107
10 W Compact Power Supply
October 26, 2005
11 Control Loop Measurements
11.1 120 VAC Maximum and 3A Load
Figure 22 - Gain-Phase Plot, 120 VAC, Maximum Steady State Load Vertical Scale: Gain = 8 dB/div, Phase = 40 /div. Crossover Frequency = 2.66 kHz Phase Margin = 88.11
Figure 23 - Gain-Phase Plot, 120 VAC, 3A Load Vertical Scale: Gain = 12 dB/div, Phase = 40 /div. Crossover Frequency = 1.32 kHz Phase Margin = 84.02
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DER-107
10 W Compact Power Supply
October 26, 2005
11.2 240 VAC Maximum and 3A Load
Figure 24 - Gain-Phase Plot, 240 VAC, Maximum Steady State Load Vertical Scale: Gain = 8 dB/div, Phase = 40 /div. Crossover Frequency = 11.11 kHz Phase Margin = 57.14
Figure 25 - Gain-Phase Plot, 240 VAC, 3A Load Vertical Scale: Gain = 12 dB/div, Phase = 40 /div. Crossover Frequency = 7.26 kHz Phase Margin = 71.65
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DER-107
10 W Compact Power Supply
October 26, 2005
12 Conducted EMI
Figure 26 - Maximum Steady State Load, 120 VAC/ 60 Hz, and EN55022 B Limits (LINE)
Figure 27 - Maximum Steady State Load, 120VAC/60 Hz, and EN55022 B Limits (Neutral)
Figure 28 - Maximum Steady State Load, 240 VAC/ 60 Hz, and EN55022 B Limits (LINE)
Figure 29 - Maximum Steady State Load, 240VAC/60 Hz, and EN55022 B Limits (Neutral)
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DER-107
10 W Compact Power Supply
October 26, 2005
13 Revision History
Date 10-26-05 Author RSP Revision 1.0 Description & changes Initial Release Reviewed KM/JC/VC
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DER-107
10 W Compact Power Supply
October 26, 2005
For the latest updates, visit our website: www.powerint.com
Power Integrations reserves the right to make changes to its products at any time to improve reliability or manufacturability. Power Integrations does not assume any liability arising from the use of any device or circuit described herein. POWER INTEGRATIONS MAKES NO WARRANTY HEREIN AND SPECIFICALLY DISCLAIMS ALL WARRANTIES INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. PATENT INFORMATION The products and applications illustrated herein (including transformer construction and circuits external to the products) 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 grants its customers a license under certain patent rights as set forth at http://www.powerint.com/ip.htm. The PI Logo, TOPSwitch, TinySwitch, LinkSwitch, DPA-Switch, EcoSmart, PI Expert and PI FACTS are trademarks of Power Integrations, Inc. Other trademarks are property of their respective companies. (c)Copyright 2005 Power Integrations, Inc.
Power Integrations Worldwide Sales Support Locations
WORLD HEADQUARTERS 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 GERMANY Rueckertstrasse 3 D-80336, Munich Germany Phone: +49-89-5527-3910 Fax: +49-89-5527-3920 e-mail: eurosales@powerint.com JAPAN Keihin Tatemono 1st Bldg 2-12-20 Shin-Yokohama, Kohoku-ku, Yokohama-shi, Kanagawa ken, Japan 222-0033 Phone: +81-45-471-1021 Fax: +81-45-471-3717 e-mail: japansales@powerint.com KOREA RM 602, 6FL Korea City Air Terminal B/D, 159-6 Samsung-Dong, Kangnam-Gu, Seoul, 135-728, Korea Phone: +82-2-2016-6610 Fax: +82-2-2016-6630 e-mail: koreasales@powerint.com 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 5F, No. 318, Nei Hu Rd., Sec. 1 Nei Hu Dist. Taipei, Taiwan 114, R.O.C. Phone: +886-2-2659-4570 Fax: +886-2-2659-4550 e-mail: taiwansales@powerint.com
CHINA (SHANGHAI) Rm 807-808A, Pacheer Commercial Centre, 555 Nanjing Rd. West Shanghai, P.R.C. 200041 Phone: +86-21-6215-5548 Fax: +86-21-6215-2468 e-mail: chinasales@powerint.com
INDIA 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
EUROPE HQ 1st Floor, St. James's House East Street, Farnham Surrey, GU9 7TJ United Kingdom Phone: +44 (0) 1252-730-140 Fax: +44 (0) 1252-727-689 e-mail: eurosales@powerint.com
CHINA (SHENZHEN) Room 2206-2207, Block A, Elec. Sci. Tech. Bldg. 2070 Shennan Zhong Rd. Shenzhen, Guangdong, China, 518031 Phone: +86-755-8379-3243 Fax: +86-755-8379-5828 e-mail: chinasales@powerint.com
ITALY Via Vittorio Veneto 12 20091 Bresso MI Italy Phone: +39-028-928-6000 Fax: +39-028-928-6009 e-mail: eurosales@powerint.com
APPLICATIONS HOTLINE World Wide +1-408-414-9660 APPLICATIONS FAX World Wide +1-408-414-9760
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Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com

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