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| Design Example Report Title Specification Application Author Document Number Date Revision 3.15W Adapter with < 100 mW standby using LNK500P Input: 90 - 264 VAC Output: 4.5V / 0.7A General Purpose Power Adapter Power Integrations Applications Department DER-111 October 26, 2005 1.0 Summary and Features * * * * * No load power consumption ~89 mW @ 230 V Uses LNK500 Low cost, low parts count No Y-cap needed to meet CISPR-22 EMI Very low AC leakage current 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-111 3.15 W General Purpose Adapter October 26, 2005 Table Of Contents Introduction................................................................................................................. 3 Photograph................................................................................................................. 3 Power Supply Specification ........................................................................................ 4 Schematic................................................................................................................... 5 Circuit Description ...................................................................................................... 6 5.1 Input Rectification, Bulk Capacitance and EMI Filtering ...................................... 6 5.2 Primary DRAIN Voltage Clamp Circuit ................................................................ 6 5.3 Auxiliary Bias Supply........................................................................................... 6 5.4 Output Rectification and Filtering ........................................................................ 6 5.5 Output Voltage Sensing and Feedback............................................................... 6 6 PCB Layout ................................................................................................................ 7 7 Bill Of Materials .......................................................................................................... 8 8 Transformer Specification........................................................................................... 9 8.1 Electrical Diagram ............................................................................................... 9 8.2 Electrical Specifications....................................................................................... 9 8.3 Materials............................................................................................................ 10 8.4 Transformer Build Diagram ............................................................................... 10 8.5 Transformer Construction.................................................................................. 11 9 Transformer Spreadsheets....................................................................................... 12 10 Performance Data................................................................................................. 14 10.1 Efficiency........................................................................................................... 14 10.2 No-load Input Power.......................................................................................... 14 10.3 Load and Line Regulation ................................................................................. 15 11 Thermal Performance ........................................................................................... 16 12 Waveforms............................................................................................................ 17 12.1 Drain Voltage Normal Operation ....................................................................... 17 12.2 Output Voltage Start-up Profile ......................................................................... 17 12.3 Drain Voltage Start-up Profile............................................................................ 18 12.4 Output Ripple Measurements............................................................................ 19 12.4.1 Ripple Measurement Technique ................................................................ 19 12.4.2 Measurement Results ................................................................................ 20 13 Conducted EMI ..................................................................................................... 21 14 Revision History .................................................................................................... 22 1 2 3 4 5 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. Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 2 of 23 DER-111 3.15 W General Purpose Adapter October 26, 2005 1 Introduction This document is an engineering report describing a 4.5 VDC, 700 mA CV adapter utilizing a LNK500P. The LNK500P is implemented as a low-side switch. Cancellation techniques are adopted in the transformer design to make the power supply meet EMI without Y capacitors. The document contains the power supply specification, schematic, bill of materials, transformer documentation, printed circuit layout, and performance data. 2 Photograph Figure 1 - Populated Circuit Board Photograph Page 3 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 3.15 W General Purpose Adapter October 26, 2005 3 Power Supply Specification Description Input Voltage Frequency No-load Input Power (230 VAC) Output Output Voltage 1 Output Ripple Voltage 1 Output Current 1 Efficiency Environmental Conducted EMI Safety Ambient Temperature TAMB Meets CISPR22B / EN55022B Designed to meet IEC950, UL1950 Class II Symbol VIN fLINE Min 90 47 Typ Max 265 64 0.1 Units VAC Hz W V mV A % Comment 2 Wire - no P.E. 50/60 VOUT1 VRIPPLE1 IOUT1 4.5 100 0.7 72 7% 20 MHz Bandwidth Measured at POUT (43 W), 25 oC 0 40 o C Free convection, sea level Page 4 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 3.15 W General Purpose Adapter October 26, 2005 4 Schematic Figure 2 - Schematic Page 5 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 3.15 W General Purpose Adapter October 26, 2005 5 Circuit Description This circuit is configured as a Flyback operating in discontinuous conduction mode. The low standby consumption is achieved by using a high gain opto-coupler, using a bias winding that provides about 8 V during no-load, and by designing a low-capacitance transformer. 5.1 Input Rectification, Bulk Capacitance and EMI Filtering AC input power is rectified by a full bridge, consisting of D1 through D4. The rectified DC is then filtered by the bulk storage capacitors C1 and C2. Inductor L1 and Ferrite bead L2 separate C1 and C2 from each other. L1, C1 and C2 form a pi () filter, which attenuates conducted differential-mode EMI noise. Fusible resistor RF1 has multiple functions. It is a fuse, an in-rush current limiting device, a final low pass filter stage (with C1) for conducted EMI attenuation and an initial stage of input surge voltage attenuation. 5.2 Primary DRAIN Voltage Clamp Circuit The DRAIN voltage clamp circuit is comprised of Zener diode VR1, R1 and diode D5. D5 and VR1 clamp the amplitude of the voltage spike that the transformer leakage inductance generates, at switch turn-off, to keep it beneath the device's maximum DRAIN to SOURCE voltage rating (700 V). R1 damps the high frequency ringing caused by leakage inductance, which improves the conducted EMI performance of the circuit. The reflected output voltage VOR, which is determined by the transformer turns ratio (13:1), has been kept low (70 V) to minimize the power dissipation in the clamp circuit. 5.3 Auxiliary Bias Supply The auxiliary bias supply circuit is made up of the primary-side transformer bias winding, diode D6 and capacitor C5. D6 rectifies the output of the winding and C5 filters it. The winding was given just enough turns so that its minimum output voltage stays at 7V at noload to minimize power consumption. C4 is the standard BP pin decoupling capacitor, which should always be a 50 V 0.1F ceramic capacitor that is located close to the IC. R3 and C9 are compensation network, along with the Linkswitch Control pin resistance, form a pole and a zero to stabilize the control loop. 5.4 Output Rectification and Filtering Output rectification and filtering are accomplished by Schottky diode D7, capacitors C6 and C7. D7 rectifies the output of the transformer, T1. 5.5 Output Voltage Sensing and Feedback Resistors R4, Zener diode VR2 and opto-isolator U2 sense the output voltage and feedback to the LinkSwitch. C10 provides power for the LinkSwitch during the time of power up, it also acts as a soft start capacitor. Page 6 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 3.15 W General Purpose Adapter October 26, 2005 6 PCB Layout Figure 3 - Printed Circuit Layout Note: R2, R5, C8 and C11 are not stuffed. Page 7 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 3.15 W General Purpose Adapter October 26, 2005 7 Bill Of Materials Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Qty 2 1 1 2 1 1 4 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Ref C1, C2 C4 C5 C6, C7 C9 C10 D1-D4 D5 D6 D7 VR1 VR2 L1 L2 RF1 RV1 R1 R3 R4 T1 U1 U2 Description 4.7uF/200V, Electrolytic cap 0.1uF/50V, ceramic 1.0uF/50V, electrolytic 470uF/10V, electrolytic cap low esr 100uF/16V, electrolytic cap 27uF/16V, electrolytic cap 1A/1000V, general diode 1A//1000V, glass passive 0.25A/200V 2.0A/60V, schottky diode 100V TVS 3.6V 2% zener diode 1.0 mH Ferrite bead 8.2R, 1W, fusible MOV, 275V, 14mm 200R, 1/4W 8.2R, 1/8W 10R, 1/8W EE16 customized transformer LNK500P Opto-coupler P/N Mfg Any Any Any Any Any Any Diode Philips Vishay ANY Any Any Tokin Any Any Any Any Any Any PI Sharp 1N4007 1N4007G BAV20 SB260 BZY97-C100 BZX79B3V6 47HY102 PC817D Page 8 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 3.15 W General Purpose Adapter October 26, 2005 8 Transformer Specification 8.1 Electrical Diagram 5 WD#1 51T #36 Cancellation 8 WD#2 Primary 5 14T # 28 TIW 178T #35 x 4 4 1 22T #35 x2 2 WD#4 Shield 9T #31 x 3 3 10 WD#5 Secondary WD#3 Bias Figure 4 - Transformer Electrical Diagram 8.2 Electrical Specifications 1 second, 60 Hz, from Pins 1 - 5 to Pins 6 -10 Pins 4-5, all other windings open, measured at 42 kHz, 0.4 VRMS Pins 4-5, all other windings open Pins 4-5, with Pins 8-10 shorted, measured at 42 kHz, 0.4 VRMS 3000 VAC 4.44 mH, 10/+10% 300 kHz (Min.) 200 H (Max.) Electrical Strength Primary Inductance Resonant Frequency Primary Leakage Inductance Page 9 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 3.15 W General Purpose Adapter October 26, 2005 8.3 Materials Description Item [1] [2] [3] [4] [5] [6] [7] [8] Core: PC40EE16-Z, TDK or equivalent Gapped for AL of 139 nH/T2 Bobbin: Horizontal 10 pin Magnet Wire: #36 AWG Magnet Wire: #35 AWG Magnet Wire: #31 AWG Triple Insulated Wire: #28 AWG. Tape: 3M 1298 Polyester Film, 2.0 mils thick, 8.4 mm wide Varnish 8.4 Transformer Build Diagram 10 WD#5 Secondary 3 2 1 5 8 WD#4 Shield WD#3 Bias WD#2 Primary 4 5 WD#1 Cancellation Figure 5 - Transformer Build Diagram Page 10 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 3.15 W General Purpose Adapter October 26, 2005 8.5 Transformer Construction Bobbin Preparation WD1 Cancellation Insulation Primary pin side of the bobbin orients to the left hand side. Start on Pin 6 temporarily. Wind 51 turns of item [3] from right to left. Wind with tight tension across entire bobbin evenly. Cut the wire after finishing 51st turn. Fold the starting lead back and finish it on Pin 5. 2 Layers of tape [7] for insulation Start on pin 4, wind 46 turns of item [4] from left to right. Apply one layer of type [7]. Then bring the wire back to left side, wind another 46 turns from left to right. Apply one layer of type [7]. Then bring the wire back to left side, wind another 46 turns from left to right. Apply one layer of type [7]. Then bring the wire back to left side, wind 40 turns from left to right. th Apply one layer of type [7]. After finishing the 178 turn, bring the wire back and finish it on pin 5. 1 Layers of tape [7] for insulation. Start on Pin 1, wind 11 bifilar turns of item [4]. Wind from left to right with tight tension. Wind uniformly, in a single layer across entire width of bobbin. Finish on Pin 2. 2 Layers of tape [7] for insulation. Start at Pin 8 temporarily, wind 9 trifilar turns of item [5]. Wind from right to left with tight tension. Wind uniformly, in a single layer across entire width of bobbin. Finish on Pin 3. Cut the starting lead. 1 Layers of tape [7] for insulation. Start at pin 8, wind 14 turns of item [6] from right to left. Wind uniformly, in a single layer across entire bobbin evenly. Finish on pin 10 3 Layers of tape [7] for insulation. WD#2 Primary Insulation WD#3 Bias Insulation WD #4 Shield Insulation WD #5 Insulation Page 11 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 3.15 W General Purpose Adapter October 26, 2005 9 Transformer Spreadsheets LinkSwitch 090803 rev1B; Copyright Power Integrations Inc. 2003 ENTER APPLICATION VARIABLES VACMIN VACMAX fL VO IO VBIAS tC CIN TARGETED / ESTIMATED LOSSES P_NO_LOAD_GOAL PCORE RCLAMP CTRF RSEC P_NO_LOAD_LOSS 0.1 100 100 mW 225.2 mW 380.0 Kohm 50.0 pF 0.1 Ohms 217 mW Estimated Resistance of transformer secondary winding. Calculated no load loss is greater than goal. Decrease VOR, increase RCLAMP, decrease CTRF, decrease VBIAS. Target noload losses must be in excess of 300mW Estimated Core Losses at peak Flux Density (BP) 90 265 50 4.5 1 7 3 9.4 msec uFarads Bridge Rectifier Conduction Time Estimate Input Filter Capacitor Volts Volts Hertz Volts Amps INPUT INFO OUTPUT UNIT LinkSwitch 090803 rev1B; Copyright Power Integrations Inc. 2003 EP12 Power Supply Minimum AC Input Voltage Maximum AC Input Voltage AC Mains Frequency Output Voltage !!! Output Power exceeds chip capability; reduce load current, choose higher LinkSwitch DC INPUT VOLTAGE PARAMETERS VMIN VMAX ENTER OUTPUT CABLE PARAMETERS RCABLE VCABLE ENTER LinkSWITCH & OUTPUT DIODE VARIABLES LinkSwitch I^2 f VOR VLEAK VD VR ID DISCONTINUOUS MODE CHECK KDP TON TDON VOLTAGE STRESS ON LinkSWITCH AND OUTPUT DIODE VDRAIN PIVS CURRENT WAVEFORM SHAPE PARAMETERS 542 Volts 33.9 Volts Maximum Drain Voltage Estimate (Includes Effect of Leakage Inductance) Output Rectifier Maximum Reverse Voltage 0.57 14.69 us 16.02 us Ensure KDP > 1.15 to for discontinuous mode operation. Linkswitch conduction time Secondary Diode conduction time 2 70 Increase Vor LNK501 Power 2710 A^2 Hz 70.00 Volts 2.00 Volts 0.7 Volts 60 Volts Amps Universal 115 Doubled/230 3 I^2 f (typical) co-efficient for LinkSwitch !!! Reflected output Voltage pushes power supply into continuous mode of operation; Increase VOR Error in Feedback voltage as a result of leakage inductance in primary circuit. Output Winding Diode Forward Voltage Drop (0.5~0.7V for schottky and 0.7~1.0V for PN diode) Rated Peak Rep Reverse Voltage of secondary diode Rated Average Forward current for secondary diode 5 0.3 Ohms 0.300 Volts Resistance of total length of cable from power supply terminals to load and back. Drop along cable connecting power supply to load 82 Volts 375 Volts Minimum DC Input Voltage Maximum DC Input Voltage Page 12 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 DMAX IAVG IRMS 3.15 W General Purpose Adapter 0.62 0.078 Amps 0.115 Amps Maximum Operating Duty Cycle Average Primary Current Primary RMS Current October 26, 2005 ENTER TRANSFORMER CORE/CONSTRUCTION VARIABLES Core Type Core Bobbin AE LE AL VE BW KCORE T(n) M NS 14 0.922 ee16 PC40EE16Z BE-16116CP 0.192 cm^2 3.5 cm 1140 nH/T^2 795 mm^3 8.5 mm 552 kW/m^3 0.9220 0 mm Core Effective Cross Sectional Area Core Effective Path Length Ungapped Core Effective Inductance Effective Core Volume Bobbin Physical Winding Width Core losses per unit volume Estimated transformer efficiency. T(n)=(PSCU+PCORE/2)/POEFF. Re-iterate with n = 0.9406 Safety Margin Width Number of Secondary Turns TRANSFORMER PRIMARY DESIGN PARAMETERS dLP LP L LBIAS NP NB ALG BP LG OD DIA AWG CMA AWG_BIAS TRANSFORMER SECONDARY DESIGN PARAMETERS ISP ISRMS IRIPPLE AWGS DIAS ODS INSS VSEC 3.23 Amps 1.53 Amps 1.16 Amps 27 AWG 0.36 mm 0.61 mm 0.12 mm 0.100 Volts Peak Secondary Current Secondary RMS Current Output Capacitor RMS Ripple Current Secondary Wire Gauge (Rounded up to next larger standard AWG value) Secondary Minimum Bare Conductor Diameter Secondary Maximum Insulated Wire Outside Diameter Maximum Secondary Insulation Wall Thickness Voltage Drop across secondary winding 4 0.25 1 1.000 Constant to account for reduction of inductance at higher flux densities. (0.999 Page 13 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 3.15 W General Purpose Adapter October 26, 2005 10 Performance Data All measurements performed at room temperature, 60 Hz input frequency. 10.1 Efficiency Efficiency 85 80 Efficiency(%) 75 70 65 60 90 110 130 150 170 190 210 230 250 270 290 Input Voltage (VAC) Figure 6 - Efficiency vs. Input Voltage at full load, Room Temperature, 60 Hz. 10.2 No-load Input Power Efficiency 120 110 Power Dissipation (mW) 100 90 80 70 60 50 40 30 20 90 110 130 150 170 190 210 230 Input Voltage (VAC) Figure 7 - Zero Load Input Power vs. Input Line Voltage, Room Temperature, 60 Hz. Page 14 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 3.15 W General Purpose Adapter October 26, 2005 10.3 Load and Line Regulation Load Regulation 4.9 Output Voltage(VDC) 4.7 4.5 4.3 4.1 3.9 3.7 3.5 0 100 200 300 400 500 600 700 800 900 1000 Output Current (mA) 90V 110V 132V 180V 230V 265V Figure 8 - Load Regulation, Room Temperature Page 15 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 3.15 W General Purpose Adapter October 26, 2005 11 Thermal Performance Test Condition: Open Air, 0.5A load Temperature (C) Item Ambient (Deg.C) Transformer (T1) TOPSwitch (U1) Rectifier (D7) 85 VAC 25 32 38 48 265 VAC 25 34 34 47 Page 16 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 3.15 W General Purpose Adapter October 26, 2005 12 Waveforms 12.1 Drain Voltage Normal Operation Figure 9 - 90 VAC, Full Load. Lower: VDRAIN, 100 V, 10 s / div Figure 10 - 265 VAC, Full Load VDRAIN, 100 V, 10 s / div 12.2 Output Voltage Start-up Profile Figure 11 - Start-up Profile, 90VAC 1 V, 50 ms / div. Figure 12 - Start-up Profile, 265 VAC 1 V, 50 ms / div. Page 17 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 3.15 W General Purpose Adapter October 26, 2005 12.3 Drain Voltage Start-up Profile Figure 13 - 90 VAC Input and Maximum Load. VDRAIN, 100 V & 50 ms / div. Figure 14 - 265 VAC Input and Maximum Load. VDRAIN, 100 V & 50 ms / div. Page 18 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 3.15 W General Purpose Adapter October 26, 2005 12.4 Output Ripple Measurements 12.4.1 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 15 and Figure 16. 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 15 - Oscilloscope Probe Prepared for Ripple Measurement. (End Cap and Ground Lead Removed) Figure 16 - Oscilloscope Probe with Probe Master 5125BA BNC Adapter. (Modified with wires for probe ground for ripple measurement, and two parallel decoupling capacitors added) Page 19 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 3.15 W General Purpose Adapter October 26, 2005 12.4.2 Measurement Results Figure 17 - Ripple, 90 VAC, Full Load. 5 ms, 100 mV / div Figure 18 - 5 V Ripple, 115 VAC, Full Load. 5 ms, 100 mV / div Figure 19 - Ripple, 230 VAC, Full Load. 5 ms, 100 mV /div Page 20 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 3.15 W General Purpose Adapter October 26, 2005 13 Conducted EMI EMI was tested at room temperature, 230 VAC input, full load Figure 20 - Line, floating Figure 21 - Line, artificial hand Figure 22 - Neutral, floating Figure 24 - Neutral, artificial hand Page 21 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 3.15 W General Purpose Adapter October 26, 2005 14 Revision History Date 10-26-05 Author DZ Revision 1.0 Description & changes Initial Release Reviewed KM/JC/VC Page 22 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com DER-111 3.15 W General Purpose Adapter October 26, 2005 PATENT INFORMATION 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, nor does it convey any license under its patent rights or the rights of others. 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 2003, 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 Rueckerstrasse 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) Power Integrations (Europe) Ltd. Centennial Court, Easthampstead Road, Bracknell, Berkshire RG12 1YQ, United Kingdom Phone: +44-1344-462-300 Fax: +44-1344-311-732 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 #1, (New #42) 8th Main Road, Vasanthnagar, Bangalore, India, 560052 Phone: +91-80-226-6023 Fax: +91-80-228-9727 e-mail: indiasales@powerint.com APPLICATIONS FAX World Wide +1-408-414-9760 Page 23 of 23 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com |
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