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Design Example Report
Title Specification Application Author Document Number Date Revision 16W Low Profile Adapter Supply using TOP245P Input: 90 - 265 VAC Output: 5.25V / 3A Video Game Power Integrations Applications Department DER-37 April 27, 2004 1.0
Summary and Features A TOP245P is used to create a low profile video game adapter that features the following: * Very low no-load consumption of <100mW @ 230 VAC * Low parts count / Low cost * Low profile, high power density * EMI has 10 dB margin even with output grounded * No Safety X-cap needed * Meets thermal requirements at 45oC ambient with good margin * No heatsinks * >80% Efficiency even at high temp * Tight Built-in Over Power Protection (no need for OCP) * < 50uA Safety 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-37
16W Adapter using TOP245P
April 27, 2004
Table Of Contents
Introduction................................................................................................................. 4 Power Supply Specification ........................................................................................ 5 Schematic................................................................................................................... 6 Circuit Description ...................................................................................................... 7 4.1 Input EMI Filtering ............................................................................................... 7 4.2 Output Rectification ............................................................................................. 7 4.3 Output Feedback................................................................................................. 7 5 PCB Layout ................................................................................................................ 9 6 Bill Of Materials ........................................................................................................ 10 7 Transformer Specification......................................................................................... 11 7.1 Electrical Diagram ............................................................................................. 11 7.2 Electrical Specifications..................................................................................... 11 7.3 Materials............................................................................................................ 12 7.4 Transformer Build Diagram ............................................................................... 13 7.4.1 SHLD Build diagram................................................................................... 13 7.5 Transformer Construction.................................................................................. 14 8 Common Mode Choke ............................................................................................. 15 8.1 Electrical Diagram ............................................................................................. 15 8.2 Electrical Specifications..................................................................................... 15 8.3 Materials............................................................................................................ 15 8.4 Common Mode Choke Build Diagram ............................................................... 16 9 Transformer Spreadsheets....................................................................................... 17 10 Performance Data................................................................................................. 18 10.1 Efficiency........................................................................................................... 18 10.2 No-load Input Power.......................................................................................... 19 10.3 Regulation ......................................................................................................... 19 10.3.1 Load ........................................................................................................... 19 10.3.2 Line ............................................................................................................ 20 10.4 Over Power Protection ...................................................................................... 20 10.5 Leakage Current ............................................................................................... 20 11 Thermal Performance ........................................................................................... 21 11.1 Thermal measurements at max ambient ........................................................... 21 11.2 Thermal margin test .......................................................................................... 21 12 Waveforms............................................................................................................ 22 12.1 Drain Voltage and Current, Normal Operation .................................................. 22 12.2 Output Voltage Start-up Profile ......................................................................... 22 12.3 Drain Voltage and Current Start-up Profile........................................................ 23 12.4 Load Transient Response (75% to 100% Load Step) ....................................... 23 12.5 Output Ripple Measurements............................................................................ 24 12.5.1 Ripple Measurement Technique ................................................................ 24 12.5.2 Measurement Results ................................................................................ 25 13 Control Loop Measurements................................................................................. 26 13.1 115 VAC Maximum Load .................................................................................. 26 13.2 230 VAC Maximum Load .................................................................................. 26
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1 2 3 4
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DER-37
16W Adapter using TOP245P
April 27, 2004
14 Conducted EMI ..................................................................................................... 27 14.1 230Vac .............................................................................................................. 27 14.1.1 Output grounded ........................................................................................ 27 14.1.2 Output floating............................................................................................ 28 14.2 115Vac .............................................................................................................. 29 14.2.1 Output grounded ........................................................................................ 29 14.2.2 Output floating............................................................................................ 30 15 Revision History .................................................................................................... 31 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.
Page 3 of 32
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DER-37
16W Adapter using TOP245P
April 27, 2004
1 Introduction
This document is an engineering report describing a prototype16W power supply utilizing a TOP245P. This power supply is designed for a sealed adapter supply. This design is low cost, low parts count and meets EMI with no X-cap. It meets thermal requirements with no heatsink in either primary or secondary side. 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. Component side (Top) and Solder side (Bottom).
Note an additional wire jumper was required on this prototype layout as shown above.
Page 4 of 32
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DER-37
16W Adapter using TOP245P
April 27, 2004
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 Total Output Power Continuous Output Power Over Power protection Over Voltage Protection 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
Units VAC Hz W V mV A W W V %
Comment
2 Wire - Output ground connected to P.E.
50/60
64 0.1
VOUT1 VRIPPLE1 IOUT1 POUT POUT_PEAK
5.25 50 3 15.75 24 6.8
5% 20 MHz bandwidth
20 80
Auto-restart Zener on output Measured at the board O/P terminals, POUT (15.75 W), 25 oC
0
45
o
C
Free convection, sea level
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DER-37
16W Adapter using TOP245P
April 27, 2004
3 Schematic
Figure 2 - Schematic.
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DER-37
16W Adapter using TOP245P
April 27, 2004
4 Circuit Description
The schematic in Figure 2 shows an off-line flyback converter using the TOP245P. The circuit is designed for 90 VAC to 265 VAC input and provides an isolated 5.25V, 3A continuous output. To provide <100m W no-load consumption at 230 VAC, a frequency reduction circuit is implemented using the X pin feature of the TOPSwitch-GX. More details of this operation provided below. 4.1 Input EMI Filtering
Conducted EMI filtering is provided by pi formed filter C4, C7, L2, & L3. The switching frequency jitter feature of the TOPSwitch-GX family allows the use of a small, low cost common mode choke for L2. To keep the peak DRAIN voltage acceptably below the BVDSS (700V) of U1, diode D2, C5 and R1&R2 form a primary clamp. This network clamps the voltage spike seen on the DRAIN due to primary and secondary reflected leakage inductance. Diode D3 and capacitor C8 provide rectified and filtered bias supply for U1. 4.2 Output Rectification
The secondary of T1 is rectified and filtered by D1, & C3. Post filter choke L1 and C6 provide additional high frequency filtering and help suppress high frequency EMI. 4.3 Output Feedback
DC feedback to the output voltage regulator error amplifier (U3) comes from a divider network R8 and R16. The center point is tied to the 2.5 V REF pin of U2. Capacitor C11 and resistor R12 roll off the high frequency gain of U3 while R5 sets the overall gain. In a typical TOPSwitch-GX design, regulation of the output is normally provided by voltage mode PWM control. The current into the CONTROL pin sets the duty cycle of the internal MOSFET. The duty cycle control operates over a CONTROL pin current of 2mA to 6mA. Current below this level is used to supply power to the IC. In this design the control is accomplished by employing the externally programmable current limit function of the TOPSwitch-GX family, which is the X pin. This allows the TOPSwitch-GX to operate at lower frequency in order to further improve light load efficiency.
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DER-37
16W Adapter using TOP245P
April 27, 2004
The CONTROL pin requires 2 mA to power the internal circuitry of the chip. Any current beyond that normally would be shunted, and commands the duty cycle to reduce. With 2 mA of current the duty cycle is set to maximum. Feedback current above ~2mA forward biases Q1 through R10 and pulls up R13 via R14. The X pin looks like a 1.2V voltage source. The current it is sourcing determines the output MOSFET peak current limit. As current decreases, the peak current limit is reduced from maximum (when X-pin current is 170 uA), down to a minimum of 40% of nominal peak current limit (when X-pin is at 30 uA). Therefore, as the feedback current increases, the sink current decreases and the primary current limit reduces, thereby allowing the output voltage feedback loop to control the primary peak current. Resistor R14 sets the peak current limit (startup and overload). Any feedback current above 2 mA engages the X pin control, the current into the CONTROL pin is limited to this level and therefore, the PWM function of the CONTROL pin does not determine the duty cycle. As the load is reduced, the primary current limit reduces until it reaches 40% of peak current limit. At this point, another X-pin function is activated. The remote ON/OFF (inhibit) threshold is reached at an X pin sink current of approximately 27 A. The supply then operates with fixed 25% current limit, but with a variable off-time, resulting in a variable switching frequency. To maintain regulation, as the load is further reduced, the frequency reduces. This greatly reduces switching losses, maintaining high standby efficiency and low no-load power consumption. Slope compensation is provided by a ramp signal generated from the bias winding via D4, R7 and C9. C9 also serves as a high frequency roll off filter.
Page 8 of 32
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DER-37
16W Adapter using TOP245P
April 27, 2004
5 PCB Layout
Figure 3 - Printed Circuit Layout. Top layer (TOP), Bottom layer (BOTTOM)
Note: Some rework was done on the actual sample board as shown in the photos above
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Page 9 of 32
DER-37
16W Adapter using TOP245P
April 27, 2004
6 Bill Of Materials
Page 10 of 32
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DER-37
16W Adapter using TOP245P
April 27, 2004
7 Transformer Specification
7.1 Electrical Diagram
4
WDG2 59T 31 AWG FLOAT 1 (8) WDG4 5T 26 AWG T.I.W. X4 FLOAT 2 (5)
3 4
WDG3 2 1/2T CU FOIL (REVERSE)
nc 2
WDG1 10T 36 AWG
1
Figure 4 -Transformer Electrical Diagram
7.2
Electrical Specifications
1 second, 60 Hz, from Pins 1-4 to Pins FLOAT 1-2 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 FLOAT 1&2 shorted, measured at 100 kHz, 0.4 VRMS 3000 VAC 750 H, -0/+20% 1000 kHz (Min.) 15 H (Max.)
Electrical Strength Primary Inductance Resonant Frequency Primary Leakage Inductance
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DER-37
16W Adapter using TOP245P
April 27, 2004
7.3
Materials
Item [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]
Description Core: EFD20 AND GAPPED ALG 211nH/T2 Bobbin: BEFD20 8 PIN HORIZONTAL ; EPCOS P/N B66418-B1008-D1 Magnet Wire: 36 AWG Magnet Wire: 31 AWG Triple Insulated Wire: 26 AWG Copper Tape: 1mil 12.2mm WIDE X 95mm LONG Tape: 3M 1298 Polyester Film, 13.7mm wide Tape: 3M 1298 Polyester Film, 16.5mm wide Jumper wire: 30 AWG Varnish
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DER-37
16W Adapter using TOP245P
April 27, 2004
7.4
Transformer Build Diagram
4 2T jumper wire
CORE
2 tape
CORE WDG4 5T 26 AWG TIW X4
FLOAT 2 FLOAT 1 1 tape 1 tape 1 tape 1 tape
4 4 3 1 2
WDG3 2 1/2 T CU FOIL (REVERSE WOUND) WDG2 59T 31 AWG WDG1 10T 36 AWG
Figure 5 - Transformer Build Diagram.
7.4.1 SHLD Build diagram
Cu Foil 1mil: 95mm L x 12.2mm W
Tape: 13.7mm Wide
36 AWG
Figure 6 - Copper shield Build Diagram.
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DER-37
16W Adapter using TOP245P
April 27, 2004
7.5
Transformer Construction
Bobbin Preparation WDG1: Vbias Basic Insulation WDG2: Primary st 1 layer Basic Insulation WDG2: Primary 2nd layer Basic Insulation WDG3: SHLD Basic Insulation WDG4: SEC Basic Insulation Pull Pin 6&7 on bobbin [2] to provide polarization. Position bobbin in the winding machine such that pins 1-4 are on the right side Start at Pin 2. Wind 10 turns of 36 AWG wire in 1 layer. Spread turns evenly across the bobbin. Finish on Pin1. Use one layer of 13.7mm tape for basic insulation. Start at Pin 3. Wind 46 turns of 31 AWG wire in 1 layer. Avoid overlapping turns. Use one layer of 13.7mm tape for basic insulation. Continue winding 13 turns of 31 AWG wire in the second layer. Do not spread the turns. Finish on Pin 4 Use one layer of 13.7mm tape for basic insulation. Use prepared copper shield shown in Figure 6. Start at Pin 4, wind 2 1/2 turns in reverse direction. Use one layer of 13.7mm tape for basic insulation. Start at pin 8 temporarily. Starting from the topside of the bobbin wind 5 turns of quadfilar 26 AWG TIW. Finish on pin 5 temporarily. Use two layers of 13.7mm tape for basic insulation. Pull out pins 8 and 5, and let the secondary leads to float, mark the start lead. Insert gapped cores into the bobbin and glue them together Wrap the secondary side of the core with two layers of 16.5mm tape as shown in Figure 7 and Figure 8 Dip varnish the finished transformer
Core Assembly Core Wrap Varnish
Figure 7 - Core 1 wrapping
st
Figure 8 - Core 2
nd
wrapping
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DER-37
16W Adapter using TOP245P
April 27, 2004
8 Common Mode Choke
8.1 Electrical Diagram
50T 28AWG
1 2
50T 28AWG
4 3
Figure 9 - Common Mode Choke Electrical Diagram
8.2
Electrical Specifications
Pins 1-4, all other windings open, measured at 10kHz, 0.4 VRMS Pins 1-4, all other windings open 7 mH, -0/+20% 300 kHz (Min.)
Inductance Resonant Frequency
8.3
Materials
Item [1] [2] [3]
Description Core: Ferrite Toroid P/N 5975001121 (Fair-Rite) (Distributor Lodestone Pacific USA Tel# (714) 970-0900) Magnet Wire: 28 AWG Varnish
Page 15 of 32
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DER-37
16W Adapter using TOP245P
April 27, 2004
8.4
Common Mode Choke Build Diagram
25T
25T
1 2
25T 25T
4 3
Figure 10 - Common Mode Choke Build Diagram.
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DER-37
16W Adapter using TOP245P
April 27, 2004
9 Transformer Spreadsheets
Page 17 of 32
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DER-37
16W Adapter using TOP245P
April 27, 2004
10 Performance Data
All measurements performed at room temperature, 60 Hz input frequency. 10.1 Efficiency Efficiency was measured at the output terminals of the board (no cables).
Efficiency 84.00 82.00 Efficiency (%) 80.00 78.00 76.00 74.00 72.00 70.00 90 115 140 165 190 215 240 265
Efficiency
Input (VAC)
Figure 11 - Efficiency vs. Input Voltage, Room Temperature, 60 Hz. Efficiency at 115 VAC and 230VAC were 81.7 % and 81.8% respectively.
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DER-37
16W Adapter using TOP245P
April 27, 2004
10.2 No-load Input Power
No - Load 140 120 Power Input (mW) 100 80 No - Load 60 40 20 0 90 115 140 165 190 215 240 265 Input (VAC)
Figure 12 - Zero Load Input Power vs. Input Line Voltage, Room Temperature, 60 Hz. No load input power at 230V was 90mW
10.3 Regulation 10.3.1 Load
Load Regulation 6 5 VOUT (VDC) 4 3 2 1 0 0 0.5 1 1.5 Load (ADC) 2 2.5 3 Load Regulation
Figure 13 - Load Regulation, Room Temperature.
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DER-37 10.3.2 Line
16W Adapter using TOP245P
April 27, 2004
Line Regulation 6 5 Vout ( VDC ) 4 3 2 1 0 90 115 140 165 190 215 240 265 Line Regulation
Input ( VAC )
Figure 14 - Line Regulation, Room Temperature, Full Load.
10.4 Over Power Protection 90VAC Output Current before Autorestart VOUT Output Power before Autorestart 3.9A 5.31 VDC 20.7 W 115VAC 4.1A 5.31 VDC 21.7 W 230VAC 4.4A 5.31 VDC 23.3 W 265VAC 4.4A 5.31 VDC 23.3 W
10.5 Leakage Current The leakage current measured at 230VAC was 47uA.
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DER-37
16W Adapter using TOP245P
April 27, 2004
11 Thermal Performance
11.1 Thermal measurements at max ambient The power supply was placed inside a mock-up plastic case of the specified dimensions. The case was placed inside a large closed carton box, and the carton was placed in an oven. The carton box was to prevent airflow on the unit under test. The ambient temperature was monitored inside the carton. The internal temperatures stabilized after 1 hour of continuous full load operation.
Temperature (C) Item External Ambient Bridge (BR1) Transformer (T1) Rectifier (D1) TOP245P (U1) 90 VAC 45 84 81 120 110 265VAC 45 74 87 122 112
11.2 Thermal margin test As a test of thermal margin, the unit was operated at 10o above max rated external ambient, or 55oC. The unit did not go into thermal shutdown. This implies plenty of thermal margin.
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DER-37
16W Adapter using TOP245P
April 27, 2004
12 Waveforms
12.1 Drain Voltage and Current, Normal Operation
Figure 15 - 90 VAC, Full Load. Upper: VDRAIN, 200 V, 2 s / div Lower: IDRAIN, 0.5 A / div
Figure 16 - 265 VAC, Full Load Upper: VDRAIN, 200 V / div Lower: IDRAIN, 0.5 A / div
12.2 Output Voltage Start-up Profile
Figure 17 - Start-up Profile, NO LOAD 230VAC 1 V, 20 ms / div.
Figure 18 - Start-up Profile, FULL LOAD 230 VAC 1 V, 20 ms / div.
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DER-37
16W Adapter using TOP245P
April 27, 2004
12.3 Drain Voltage and Current Start-up Profile
Figure 19 - 90 VAC Input and Maximum Load. Upper: VDRAIN, 200 V & 1 ms / div. Lower: IDRAIN, 0.5 A / div.
Figure 20 - 265 VAC Input and Maximum Load. Upper: VDRAIN, 200 V & 1 ms / div. Lower: IDRAIN, 0.5 A / div.
12.4 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 21 - Transient Response, 115 VAC, 75-10075% Load Step. Waveform: Output Voltage 100 mV, 500 s / div.
Figure 22 - Transient Response, 230 VAC, 75-10075% Load Step Waveform: Output Voltage 100 mV, 500uS / div.
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DER-37
16W Adapter using TOP245P
April 27, 2004
12.5 Output Ripple Measurements 12.5.1 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 23 and Figure 24. 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 23 - Oscilloscope Probe Prepared for Ripple Measurement. (End Cap and Ground Lead Removed)
Figure 24 - 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-37
16W Adapter using TOP245P
April 27, 2004
12.5.2 Measurement Results
Figure 25 - 5V Ripple, 90 VAC, Full Load. 5 ms, 10 mV / div
Figure 26 - 5 V Ripple, 115 VAC, Full Load. 5 ms, 10 mV / div
Figure 27 - 5V Ripple, 230 VAC, Full Load. 5 ms, 10 mV /div
Figure 28 - 5V Ripple, 265 VAC, Full Load. 5 ms, 10 mV /div
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DER-37
16W Adapter using TOP245P
April 27, 2004
13 Control Loop Measurements
13.1 115 VAC Maximum Load
Figure 29 - Gain-Phase Plot, 115 VAC, Maximum Steady State Load Vertical Scale: Gain = 16 dB/div, Phase = 36 /div. Crossover Frequency = 1.6 kHz Phase Margin = 71
13.2 230 VAC Maximum Load
Figure 30 - Gain-Phase Plot, 230 VAC, Maximum Steady State Load Vertical Scale: Gain = 16 dB/div, Phase = 36 /div. Crossover Frequency = 2.3 KHz, Phase Margin = 75
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DER-37
16W Adapter using TOP245P
April 27, 2004
14 Conducted EMI
EMI was tested at room temperature, at 115 VAC & 230 VAC input, with a resistor load of 2 ohms at the end of a 1.5 meter cable. Scans are shown for both cases, with and without a ground wire connecting the load to the LISN's Protective Earth (PE) jack. 14.1 230Vac 14.1.1 Output grounded
Figure 31 - NEUTRAL Conducted EMI, Maximum Steady State Load, 230 VAC, 60 Hz, and EN55022 B Limits. With the LISN's PE connected to secondary ground.
Figure 32 - LINE Conducted EMI, Maximum Steady State Load, 230 VAC, 60 Hz, and EN55022 B Limits. With the LISN's PE connected to secondary ground.
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DER-37
16W Adapter using TOP245P
April 27, 2004
14.1.2 Output floating
Figure 33 - NEUTRAL Conducted EMI, Maximum Steady State Load, 230 VAC, 60 Hz, and EN55022 B Limits. Without the LISN's PE connection to secondary ground.
Figure 34 - LINE Conducted EMI, Maximum Steady State Load, 230 VAC, 60 Hz, and EN55022 B Limits. Without the LISN's PE connection to secondary ground.
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DER-37
16W Adapter using TOP245P
April 27, 2004
14.2 115Vac 14.2.1 Output grounded
Figure 35 - NEUTRAL Conducted EMI, Maximum Steady State Load, 115 VAC, 60 Hz, and EN55022 B Limits. With the LISN's PE connected to secondary ground.
Figure 36 - LINE Conducted EMI, Maximum Steady State Load, 115 VAC, 60 Hz, and EN55022 B Limits. With the LISN's PE connected to secondary ground.
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DER-37
16W Adapter using TOP245P
April 27, 2004
14.2.2 Output floating
Figure 37 - NEUTRAL Conducted EMI, Maximum Steady State Load, 115 VAC, 60 Hz, and EN55022 B Limits. Without the LISN's PE connection to secondary ground.
Figure 38 - LINE Conducted EMI, Maximum Steady State Load, 115 VAC, 60 Hz, and EN55022 B Limits. Without the LISN's PE connection to secondary ground.
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DER-37
16W Adapter using TOP245P
April 27, 2004
15 Revision History
Date April 27, 2004 Author ME Revision 1.0 Description & changes Initial release Reviewed VC / AM
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DER-37
16W Adapter using TOP245P
April 27, 2004
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.
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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 3.5 - Single sided Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com
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