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power integrations 5245 hellyer avenue, san jose, ca 95138 usa. tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com design example report title 3.9w cv/cc charger using tny266p with < 100 mw standby specification input: 85 ? 265 vac output: 6.5v / 0.6a application cell phone charger author power integrations applications department document number DER-33 date april 1, 2004 revision 1.0 summary and features this document is an engineering report describing a 6.5 vdc, 600 ma cv/cc charger utilizing a tny266p featuring: ? no load power consumption ~69 mw @ 230v ? achieves cable-drop compensation with no tl431 ? uses tny266p ? low cost , low parts count ? no y-cap needed to meet cispr-22 emi even with artificial hand ? 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 .
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 2 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com table of contents 1 introduction.................................................................................................................3 2 photograph .................................................................................................................3 3 power supply specification ........................................................................................4 4 schematic...................................................................................................................5 5 circuit descr iption.......................................................................................................6 5.1 input rectification, bulk capacitance and emi filtering ......................................6 5.2 primary drain voltag e clamp circuit ................................................................6 5.3 auxiliary bias supply ...........................................................................................6 5.4 output rectification and filtering.........................................................................6 5.5 output voltage sensing and feedback ...............................................................7 6 pcb layout ................................................................................................................8 7 bill of mate rials...........................................................................................................9 8 transformer specification.........................................................................................10 8.1 electrical diagram .............................................................................................10 8.2 electrical spec ifications.....................................................................................10 8.3 materials............................................................................................................11 8.4 transformer build diagram ...............................................................................11 8.5 transformer construction..................................................................................12 9 transformer spreadsheets .......................................................................................13 10 performance data .................................................................................................15 10.1 output characteristic.........................................................................................15 10.2 efficiency ...........................................................................................................15 10.3 no-load input power..........................................................................................16 10.4 load and line regulati on in cv mode ..............................................................16 11 thermal performance ...........................................................................................17 12 waveforms............................................................................................................18 12.1 drain voltage normal operation........................................................................18 12.2 output voltage start-up profile..........................................................................18 12.3 drain voltage star t-up profile ............................................................................19 12.4 output ripple measurements............................................................................20 12.4.1 ripple measur ement technique.................................................................20 12.4.2 measurement results ................................................................................21 13 conducted emi .....................................................................................................22 14 revision history ....................................................................................................23 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.
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 3 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 1 introduction this document is an engineering report describing a 6.5 vdc, 600 ma cv/cc charger utilizing a tny266p. the tny266p is implemented as both a switch and controller into a flyback converter. cancellation techniques are adopted in the transformer design to make the power supply meet emi without y capacitors. the document contains the pow er supply specification, schematic, bill of materials, transformer documentation, printed circuit layout, and performance data. 2 photograph figure 1 ? populated circuit board photograph.
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 4 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 3 power supply specification description symbol min typ max units comment input voltage v in 85 265 vac 2 wire ? no p.e. frequency f line 47 50/60 64 hz no-load input power (230 vac) 0.1 w output output voltage 1 v out1 6.5 v 7% output ripple voltage 1 v ripple1 100 mv 20 mhz bandwidth output current 1 i out1 0.6 a efficiency 62 % measured at p out (3.9 w), 25 o c environmental conducted emi meets cispr22b / en55022b safety designed to meet iec950, ul1950 class ii ambient temperature t amb 0 40 o c free convection, sea level
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 5 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 4 schematic figure 2 ? schematic.
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 6 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 5 circuit description this circuit is configured as a flyback operating in both continuous and discontinuous conduction mode. the low standby consumption is achieved by using a high gain opto- coupler, using a bias winding that provides about 10v 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 c3, r1, r2 and diode d5. d5 and c3 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). r2 damps the high frequency ringing caused by leakage inductance, which improves the conducted emi performance of the circuit. 5.3 auxiliary bias supply the tinyswitch-ii normally does not need a bias supply because it has a high voltage current source to supply the internal chip consumption. if an external current is applied to the bp pin (which is the internal power supply of the chip), it turns off the hv current source and regulates the voltage on the bp pin like a zener. the power dissipated in the hv current source is saved. this power savings is on the order of 50-100 mw. this is needed to achieve a <100mw standby consumption. 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 10v at no-load to minimize power consumption. c4 is the standard bp pin decoupling capacitor, which should always be a 50 v 0.1 f ceramic capacitor that is located close to the ic. r3 is used to regulate the current into the bp pin. 5.4 output rectifi cation and filtering output rectification and filtering are accomplished by schottky diode d7, capacitors c6 and c7. d7 rectifies the output of the transformer, t1. r10 and c8 dampen out the high frequency interaction between d7, t1 and u1, to reduce conducted emi noise generation. c6 filters the initial rectified output, while l3 and c7 serve as a secondary low-pass filter stage, which further reduce the output ripple voltage.
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 7 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 5.5 output voltage sensing and feedback transistor q1, resistors r4, r5, r6, r7, r8, r9, diode d8, zener diode vr2 and opto- isolator u2 form the cv, cc, and cable drop compensation circuit. q1, r6, r7, r8, r9, vr2, d8 and u2 comprise the constant voltage (cv) mode control loop and cable compensation control loop while r4, r5 and u2 make up the constant current (cc) mode control loop. cc mode operation the cc mode set-point is determined by the voltage drop on the optocoupler led and the voltage drop on r5. the voltage drop on r4 is quite small and can be ignored. the tinyswitch-ii has an en pin current that is very constant with power delivery, so therefore the current in the optocoupler led is very constant. for this reason the cc set-point does not change with load voltage. cv mode and cable drop compensation operation the cv mode set-point is set by the voltage drops on vr1, r7, and the vbe of q1. the voltage on r7 depends on the operation of the cable drop compensation circuit. in order to have a regulated voltage at the end of the cable, the load current produces a voltage drop on r9 which feeds to the base of q1, through r8. the net effect is that the voltage set-point increases as the load increases, canceling the voltage drop in the output cable. d6 provides temperature compensation for the temperature coefficient of q1.
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 8 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 6 pcb layout figure 3 ? printed circuit layout. note: the total value of r5 and r5a is the value shown in schematic.
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 9 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 7 bill of materials item qty ref description p/n mfg 1 2 c1, c2 4.7uf 400v, electrolytic capacitor kmg400vb4r7m nippon chemi-con 2 1 c3 1.0nf, 1 kv, ceramic z5u dielectric any 3 1 c4 0.1 f, 50 v, ceramic x7r dielectric any 4 1 c8 1nf, 100 v, ceramic x7r dielectric any 5 1 c5 10 f, 63 v kmg63vb10rm nippon chemi-con 6 1 c6 680uf, 10v, low esr kze10vb681m nippon chemi-con 7 1 c7 100 f, 10 v, low esr kze10vb101m nippon chemi-con 8 4 d1, d2, d3, d4 1 a, 1000 v 1n4007 any 9 1 d5 1 a, 1000 v, glass passivated 1n4007g any 10 1 d6 200v, 200ma, fast bav20 any 11 1 d7 60v, 2a, schottky sb260 any 12 1 d8 75v, 150ma, fast 1n4148 any 13 1 j1, ac input connector any 14 1 j2 dc output connector any 15 1 l1 1.0mh any 16 2 l2, l3 ferrite bead any 17 1 q1 40v, 200ma, pnp 2n3906 any 18 1 rf1 8.2r, 1.0w any 19 1 r1 200k, 1/2w any 20 1 r2 200r, 1/4w any 21 1 r3 5.1k, 1/4w any 22 1 r4 300r, 1/4w any 23 1 r5 1.82r, 2.0w any 24 1 r6 1k, 1/4w any 25 1 r7 330r, 1/4w any 26 1 r8 120r, 1/4w any 27 1 r9 0.25r, 1/2w any 28 1 r10 16r, 1/4w any 29 1 t1 ee13 transformer custom any 30 1 u1 tinyswitch-ii tny266p power integrations 31 1 u2 opto-coupler pc817d isocom / any 32 1 vr1 5.6v, 1/4 w, 2% bzx79-b5v6 any
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 10 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 8 transformer specification 8.1 electrical diagram secondary 19t #34 x 2 1 2 1 7, 8 5, 6 primary 77t #34 8t # 24 tiw wd#2 wd#1 cancellation 6t #28 x 3 wd#4 shield 4 wd#3 bias 3 1 12t #33 x 3 wd#5 figure 4 ?transformer electrical diagram 8.2 electrical specifications electrical strength 1 second, 60 hz, from pins 1 - 4 to pins 5 -8 3000 vac primary inductance pins 1-2, all other windings open, measured at 132 khz, 0.4 vrms 1.11 mh, - 10/+10% resonant frequency pins 1-2, all other windings open 600 khz (min.) primary leakage inductance pins 1-2, with pins 6-7 shorted, measured at 132 khz, 0.4 vrms 50 h (max.)
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 11 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 8.3 materials item description [1] core: pc40ee13-z, tdk or equivalent gapped for al of 187 nh/t 2 [2] bobbin: horizontal 8 pins [3] magnet wire: #34 awg [4] magnet wire: #33 awg [5] magnet wire: #28 awg [6] triple insulated wire: #24 awg. [7] tape: 3m 1298 polyester film, 2.0 mils thick, 7.6 mm wide [8] varnish 8.4 transformer build diagram 1 wd#2 primary 2 3 1 wd#1 cancellation wd#4 shield wd#3 bias wd#5 secondary 1 5, 6 7, 8 4 figure 5 ? transformer build diagram.
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 12 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 8.5 transformer construction bobbin preparation primary pin side of the bobbin orients to the left hand side. wd#1 cancellation start on pin 8 temporarily. wind 19 turns bifilar of item [3] from right to left. wind with tight tension across entire bobbin evenly. cut the wire after finishing 19 th turn. fold the starting lead back and finish it on pin 1. insulation 2 layers of tape [7] for insulation wd#2 primary start on pin 2, wind 38 turns of item [3] from left to right. apply one layer of type [7]. wind another 39 turns from right to left and finish it on pin 1. apply one layer of type [7]. insulation 1 layers of tape [7] for insulation. wd#3 bias start on pin 4, wind 12 trifilar turns of item [4]. wind from left to right with tight tension. wind uniformly, in a single layer across entire width of bobbin. fold back the wire and finish on pin 3. insulation 2 layers of tape [7] for insulation. wd #4 shield start at pin 8 temporarily, wind 6 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 1. cut the starting lead. insulation 1 layers of tape [7] for insulation. wd #5 start at pin 7, wind 8 turns of item [6] from right to left. wind uniformly, in a single layer across entire bobbin evenly. bring the wire back and finish on pin 6 insulation 3 layers of tape [7] for insulation. finish grind the core to get 1.11mh. secure the core with tape. vanish the transformer
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 13 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 9 transformer spreadsheets acdc_tny- ii_rev1_1_032701 copyright power integrations inc. 2001 input info outpu t unit acdc_tnyii_rev1_1_032701.xls: tinyswitch-ii continuous/discontinuous flyback transformer design spreadsheet enter application variables customer vacmin 85 volts minimum ac input voltage vacmax 265 volts maximum ac input voltage fl 50 hertz ac mains frequency vo 7.8 volts output voltage po 5.26 watts output power n 0.7 efficiency estimate z 0.5 loss allocation factor tc 3 msecon ds bridge rectifier conduction time estimate cin 9.4 ufarads input filter capacitor enter tinyswitch-ii variables tny-ii tny266 univers al 115 doubled/230v chosen device tny266 power out 9.5w 15w ilimitmin 0.325 amps tinyswitch minimum current limit ilimitmax 0.375 amps tinyswitch maximum current limit fs 132000 hertz tinyswitch switching frequency fsmin 120000 hertz tinyswitch minimum switching frequency (inc. jitter) fsmax 144000 hertz tinyswitch maximum switching frequency (inc. jitter) vor 80 volts reflected output voltage vds 7.9 volts tinyswitch on-state drain to source voltage vd 0.5 volts output winding diode forward voltage drop kp 0.69 ripple to peak current ratio (0.6 DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 14 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com bac 950 gauss ac flux density for core loss curves (0.5 x peak to peak) ur 1588 relative permeability of ungapped core lg warning 0.10 mm !!!!!!!!!! increase gap>>0.1 (increase ns, decrease vor,bigger core bwe 14.8 mm effective bobbin width od 0.19 mm maximum primary wire diameter including insulation ins 0.04 mm estimated total insulation thickness (= 2 * film thickness) dia 0.15 mm bare conductor diameter awg 35 awg primary wire gauge (rounded to next smaller standard awg value) cm 32 cmils bare conductor effective area in circular mils cma warning 183 cmils/a mp !!!!!!!!!! increase cma>200 (increase l(primary layers),decrease ns,larger core) transformer secondary design parameters (single output / single output equivalent) lumped parameters isp 3.13 amps peak secondary current isrms 1.32 amps secondary rms current io 0.67 amps power supply output current iripple 1.14 amps output capacitor rms ripple current cms 264 cmils secondary bare conductor minimum circular mils awgs 25 awg secondary wire gauge (rounded up to next larger standard awg value) dias 0.46 mm secondary minimum bare conductor diameter ods 0.93 mm secondary maximum outside diameter for triple insulated wire inss 0.23 mm maximum secondary insulation wall thickness voltage stress parameters vdrain 563 volts maximum drain voltage estimate (includes effect of leakage inductance) pivs 47 volts output rectifier maximum peak inverse voltage transformer secondary design parameters (multiple outputs) 1st output vo1 11.0 volts output voltage io1 0.010 amps output dc current po1 0.11 watts output power vd1 0.7 volts output diode forward voltage drop ns1 11.28 output winding number of turns isrms1 0.020 amps output winding rms current iripple1 0.02 amps output capacitor rms ripple current pivs1 66 volts output rectifier maximum peak inverse voltage
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 15 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 10 performance data all measurements performed at room temperature, 60 hz input frequency. 10.1 output characteristic v-i characteristic 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 0 100 200 300 400 500 600 700 output current (ma) output voltage (vdc) 85 vac 265 vac figure 4 - typical output characteristic. 10.2 efficiency measured at 0.6a load. efficiency 50 55 60 65 70 80 100 120 140 160 180 200 220 240 260 280 300 input voltage (vac) efficiency(%) figure 6 - efficiency vs. input voltage at full load, room temperature, 60 hz.
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 16 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 10.3 no-load input power no-load input power 20 30 40 50 60 70 80 90 100 80 100 120 140 160 180 200 220 240 260 280 300 input voltage (vac) input power(mw) figure 7 - zero load input power vs. input line voltage, room temperature, 60 hz. 10.4 load and line regul ation in cv mode measured at the end of a cable with 0.25 ? resistance. note the very flat voltage characteristic because of the cable drop compensation. load regulation 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 0 100 200 300 400 500 600 output current (ma) output voltage(vdc) 85v 110v 132v 180v 230v 265v figure 8 ?load regulation, room temperature.
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 17 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 11 thermal performance test condition: open air, 0.6a load temperature ( c) item 85 vac 265 vac ambient (deg.c) 25 25 transformer (t1) 38 40 tinyswitch-ii (u1) 53 53 rectifier (d7) 56 59
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 18 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 12 waveforms 12.1 drain voltage normal operation figure 9 - 85 vac, full load. lower: v drain , 100 v, 10 s / div figure 10 - 265 vac, full load v drain , 100 v, 10 s / div 12.2 output voltage start-up profile figure 11 - start-up profile, 85vac 1 v, 10 ms / div. figure 12 - start-up profile, 265 vac 1 v, 10 ms / div.
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 19 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 12.3 drain voltage start-up profile figure 13 - 85 vac input and maximum load. v drain , 100 v & 2 ms / div. figure 14 - 265 vac input and maximum load. v drain , 100 v & 1 ms / div.
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 20 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 12.4 output ripple measurements 12.4.1 ripple measurement technique for dc output ripple measurements, a modifi ed oscilloscope test probe must be utilized in order to reduce spurious signals due to pickup. details of the probe modification are provided in figure 19 and figure 20. 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). 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) probe ground probe tip
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 21 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 12.4.2 measurement results figure 17 - ripple, 85 vac, full load. 5 ms, 20 mv / div figure 18 - 5 v ripple, 110 vac, full load. 5 ms, 20 mv / div figure 19 - ripple, 230 vac, full load. 5 ms, 20 mv /div
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 22 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 13 conducted emi emi was tested at room temperature, 230 vac input, full load figure 20 line, floating figur e 21 line, artificial hand figure 22 neutral, floating figure 24 neutral, artificial hand
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 23 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com 14 revision history date author revision description & changes reviewed april 1, 2004 dz 1.0 first release vc /am
DER-33 3.9w cc/cv tny266p charger april 1, 2004 page 24 of 24 power integrations tel: +1 408 414 9200 fax: +1 408 414 9201 www.powerint.com for the latest updates, visit our web site: 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, 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. ? 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 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 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 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 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 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 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 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 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 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 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 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 applications hotline world wide +1-408-414-9660 applications fax world wide +1-408-414-9760

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