Title Reference Design Report for a >92% Efficient 75 W Power Factor Corrected LED Driver Using LinkSwitchTM-PH LNK420EG Specification 190 VAC - 300 VAC Input; 29 V - 36 V, 2.1 A Output Application LED Driver for Industrial High Bay Light Author Applications Engineering Department Document Number RDR-290 Date October 12, 2012 Revision 1.2 Summary and Features Single-stage combined power factor correction and accurate constant current (CC) output Low cost, low component count and small PCB footprint Highly energy efficient, >92 % at 230 VAC input; 36 V LED Fast start-up time (<300 ms) - no perceptible delay Integrated protection features Single shot no-load latching protection / output short-circuit protected with auto-recovery Auto-recovering thermal shutdown with large hysteresis protects both components and printed circuit board No damage during brown-out conditions PF >0.95 at 230 VAC Meet Class C Harmonics Limits EN61000-3-2 Meet EN55015 conducted EMI %A THD <20% at 230 VAC Meets IEC ring wave (2.5 kV), differential line surge (2 kV), common mode line surge (4 kV) and EN55015 conducted EMI 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 . . Power Integrations 5245 Hellyer Avenue, San Jose, CA 95138 USA. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 Table of Contents 1 2 3 4 Introduction ................................................................................................................. 4 Power Supply Specification ........................................................................................ 6 Schematic ................................................................................................................... 7 Circuit Description ...................................................................................................... 8 4.1 Input EMI Filtering ............................................................................................... 8 4.2 Flyback Using LinkSwitch-PH.............................................................................. 8 4.3 Output Rectification ............................................................................................. 9 4.4 Protection ............................................................................................................ 9 5 PCB Layout .............................................................................................................. 10 6 Bill of Materials ......................................................................................................... 11 6.1 Electrical Bill of Materials................................................................................... 11 6.2 Mechanical Bill of Materials ............................................................................... 12 7 Transformer Specification ......................................................................................... 13 7.1 Electrical Diagram ............................................................................................. 13 7.2 Electrical Specifications ..................................................................................... 13 7.3 Materials ............................................................................................................ 13 7.4 Transformer Build Diagram ............................................................................... 14 7.5 Transformer Construction .................................................................................. 14 7.6 Transformer Core Wrapping Process ................................................................ 15 8 Transformer Design Spreadsheet............................................................................. 18 9 Heat Sink Assemblies ............................................................................................... 21 9.1 Diode Heat Sink ................................................................................................ 21 9.1.1 Diode Heat Sink Drawing ........................................................................... 21 9.1.2 Diode Heat Sink Fabrication Drawing......................................................... 22 9.1.3 Diode and Heat Sink Assembly Drawing .................................................... 23 9.2 eSIP Heat Sink .................................................................................................. 24 9.2.1 eSIP Heat Sink Drawing ............................................................................. 24 9.2.2 eSIP Heat Sink Fabrication Drawing .......................................................... 25 9.2.3 eSIP and Heat Sink Assembly Drawing ..................................................... 26 10 Performance Data ................................................................................................. 27 10.1 Active Mode Efficiency ...................................................................................... 27 10.2 Line Regulation ................................................................................................. 28 10.3 Power Factor ..................................................................................................... 29 10.4 %THD ................................................................................................................ 30 10.5 Harmonic Currents ............................................................................................ 31 11 Thermal Performance ........................................................................................... 33 11.1 Equipment Used ................................................................................................ 33 11.2 Thermal Result .................................................................................................. 33 11.3 Thermal Scan .................................................................................................... 34 12 Waveforms ............................................................................................................ 36 12.1 Drain Voltage and Current, Normal Operation................................................... 36 12.2 Drain Voltage and Current, Start-up Operation ................................................. 36 12.3 Drain Voltage and Current, Output Short .......................................................... 37 12.4 Output Voltage and Output Current Start-up Profile .......................................... 37 Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 2 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12.5 Output Current at Normal Operation ..................................................................38 12.6 Line Transient Response ...................................................................................38 12.7 Start-up No-load and Normal Operation then No-load .......................................39 12.8 Secondary Diode Voltage Stress .......................................................................39 12.9 Line Surge Waveform ........................................................................................40 13 Line Surge .............................................................................................................41 14 Conducted EMI .....................................................................................................42 14.1 Equipment .........................................................................................................42 14.2 EMI Test Set-up .................................................................................................42 15 Revision History ....................................................................................................49 Important Note: Although this board is designed to satisfy safety requirements for non-isolated LED driver, 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. Page 3 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 1 Introduction This document is an engineering report describing an isolated LED driver (power supply) utilizing a LNK420EG from the LinkSwitch-PH family of devices. The RD-290 provides a single constant current output of 2.1 A over an LED string voltage of 29 V to 36 V in a highly efficient, simple and low component count design. The board was optimized to operate over the high AC input voltage range (190 VAC to 300 VAC, 47 Hz to 63 Hz). LinkSwitch-PH based designs provide a high power factor (>0.95) with low harmonic current content, easily meeting international limits. The form factor of the board was chosen to illustrate the simplicity of fitting into standard down light applications. The document contains the power supply specification, schematic, bill of materials, transformer documentation, printed circuit layout, and performance data. Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 4 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) Figure 1 - Populated Circuit Board Photograph. Page 5 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 2 Power Supply Specification The table below represents the minimum acceptable performance of the design. Actual performance is listed in the results section. Description Input Voltage Frequency Power Factor %ATHD Output Output Voltage Output Current Total Output Power Continuous Output Power Efficiency Nominal Symbol Min Typ Max Units Comment VIN fLINE 190 47 0.95 300 63 VAC Hz 2 Wire - no P.E. 50/60 At any line input voltage EN61000-3-2(c) 20 VOUT IOUT 29 1.95 32 2.1 36 2.25 V A POUT 75 W 92 % o Measured at 32 V, 2.1 A, 25 C, 230 VAC Environmental Conducted EMI Meets CISPR22B / EN55015 Line Surge Differential Mode (L1-L2) 2 kV 1.2/50 s surge, IEC 1000-4-5, Series Impedance: Differential Mode: 2 Common Mode (L1-PE,L2-PE) 4 kV Differential Mode: 12 2.5 kV 2 short-circuit Series Impedance Ring Wave (100 kHz) Differential Mode (L1-L2) Meets EN61000-3-2 Class C Harmonic Currents Internal Ambient Temperature TAMB 0 Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com 70 o C Board level, free convection, sea level Page 6 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 3 Schematic Figure 2 - Schematic. Page 7 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 4 Circuit Description The LinkSwitch-PH (U1) is a highly integrated primary side controller intended for use in isolated LED driver applications. The LinkSwitch-PH provides high efficiency, high power factor and low THD in a single-stage conversion topology while regulating the output current over a wide range of input (180 VAC - 300 VAC) and output voltage variations typically found in LED driver application environments. All of the control circuitry necessary for these functions plus the high-voltage power MOSFET is incorporated into the device. 4.1 Input EMI Filtering The AC supply to the LED driver is protected by fuse. The system input voltage is limited by RV1, D1, R5 and C2 during differential mode line surge voltage events. The AC input is rectified by BR1. Minimal filter capacitance is used in order to achieve high power factor, low THD and low input current harmonics. Capacitor C8 provides a low impedance source for the primary switching currents. Capacitor C1, common-mode choke L1, and differential choke L2, perform EMI filtering while maintaining high-power factor. This input filter network plus the frequency jittering feature of LinkSwitch-PH allows compliance to Class B emission limits. Resistor R3 is used to damp the resonance of the EMI filter, preventing peaks in the conducted EMI spectrum. Capacitors CY1 and CY2 and C13 provide EMI filtering, reducing common mode conducted EMI currents. 4.2 Flyback Using LinkSwitch-PH Diode D2 and C3 detect the peak AC line voltage. This voltage is converted to a current into the VOLTAGE MONITOR (V) pin via R6 and R7. This current is also used by the device to set the input over/under voltage protection thresholds and to provide a linear relationship between input voltage and the output current. The V pin current and the FEEDBACK (FB) pin current are used internally to control the average output LED current. Constant current (CC) non-dimming applications require 24.9 k 1% resistance (R9) on the REFERENCE (R) pin. Diode D6, C9, C10, and R15, create the primary bias supply. This bias voltage is rectified and filter through D6 and C10 respectively. R15 filters the high frequency due to leakage which improves emi and regulation. The supply is used to supply current into the BYPASS (BP) pin through D5 and R10. Capacitors C6 and C5 serve as decoupling capacitors for the BP pin. Capacitor C6 is charged via an internal high-voltage current source connected to the DRAIN (D) pin of U1. This provides the energy to operate U1 until the bias voltage rises and supplies enough current can be provided via D5. Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 8 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) The output voltage is sensed via R11 which feeds a current in the FB pin proportional to the bias voltage. The bias is related to the output voltage via the bias to output winding turns ratio. Diode D3 and VR1 clamp due to leakage inductance generated voltage spikes on the drain to a safe level. Diode D4 is necessary to prevent reverse current from flowing through the LinkSwitch-PH device. D4 is low drop diode (Schottky) selected to achieve good efficiency. T1 core size, winding construction and wire gauge are optimized to minimize interwinding capacitance and low AC loss to achieve good efficiency. 4.3 Output Rectification Diodes D9 and D10 rectify the secondary winding while capacitors C17 and C18 filter the output. The anode of rectifier diodes are connected to dedicated transformer output windings to assure current sharing. Dedicated RC clamping circuits are placed across each output diode to reduce voltage stress and to limit ringing, reducing radiated and conducted noise. Diodes D9 and D10 are low drop diodes (Schottky), selected to improve efficiency. 4.4 Protection The system is protected by a latching over-voltage circuit (D7, C11, C12, VR3, Q1, Q2, R13, R14, R16 and R20). A separate bias voltage was used (via D7 and C11) to reduce the time for the OVP to trigger. Resistor R20 prevents the BP pin being pulled to below ~2 V which limits the dissipation of U1 when the latch is triggered. The OVP circuit operates if the load is not connected and prevents catastrophic failure of the output capacitor. The latch can only be reset by recycling the AC input. The device is thermally protected in case the system is operated above the specified temperature range. Page 9 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 5 PCB Layout Figure 3 - Top Printed Circuit Layout. Figure 4 - Bottom Printed Circuit Layout. Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 10 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 6 Bill of Materials The table below is divided into two sections: electrical and mechanical. 6.1 Electrical Bill of Materials Item Qty Ref Des 1 1 BR1 Description 2 1 C1 220 nF, 305 VAC, Film, X2 3 1 C2 10 F, 450 V, Electrolytic, (12.5 x 20) 4 1 C3 220 nF, 630 V, Film 5 1 C5 100 nF 25 V, Ceramic, X7R, 0603 6 1 C6 100 F, 10 V, Tant Electrolytic, C Case, SMD 7 1 C8 470 nF, 630 V, Film 8 2 C9 C10 2.2 F, 50 V, Ceramic, Y5V, 1206 1 F, 50 V, Ceramic, X7R, 0805 1000 V, 4 A, Bridge Rectifier 9 2 C11 C12 10 1 C13 11 2 C14 C15 330 pF, 1 kV, Disc Ceramic 2200 F, 50 V, Electrolytic, Gen. Purpose, (18 x 35.5) 2.2 nF, Ceramic, Y1 Manufacturer P/N Manufacturer KBL10-E4/51 Vishay R463I322000M2M Kemet EKMG451ELL100MK20S United Chemi-Com ECQ-E6224KF Panasonic ECJ-1VB1E104K Panasonic T491C107K010AS Kemet ECQ-E6474KF Panasonic GRM31MF51H225ZA01L Murata 08055D105KAT2A AVX 440LD22-R Vishay 562R5GAT33 Vishay EKMG500ELL222MLP1S Nippon Chemi-Con 440LT68-R Vishay DL4007-13-F Diodes, Inc. 1N4007-E3/54 Vishay UF5407-E3/54 Vishay SK3200B-LTP Micro Commercial BAV21WS-7-F Diodes, Inc. 12 2 C17 C18 13 2 CY1 CY2 14 1 D1 15 1 D2 16 1 D3 17 1 18 3 19 2 D4 D5 D6 D7 D9 D10 250 V, 40 A, Schottky, TO-220AC MBR40250G On Semi 20 1 F1 5 A, 250 V, Slow, TR5 37215000411 Wickman 21 1 J1 CONN TERM BLOCK 5.08 MM 3POS ED120/3DS On Shore Technology 22 1 J2 CONN TERM BLOCK 5.08 MM 2POS ED120/2DS On Shore Technology 23 1 L1 33 mH, 0.8 A, Common Mode Choke ELF-18D650H Panasonic 2761008112 Fair-Rite 24 1 L2 25 1 Q1 26 1 27 3 28 1 Q2 R1 R2 R5 R3 29 1 R6 30 1 31 32 680 pF, Ceramic, Y1 1000 V, 1 A, Rectifier, Glass Passivated, DO213AA (MELF) 1000 V, 1 A, Rectifier, DO-41 1000 V, 3 A, Ultrafast Recovery, 50 ns, DO201AD 200 V, 3 A, DIODE SCHOTTKY 1A 200V, SMB 250 V, 0.2 A, Fast Switching, 50 ns, SOD-323 3.5 mm x 11.4 mm, 144 at 100 MHz, #22 AWG hole, Ferrite Bead PNP, Small Signal BJT, 40 V, 0.2 A, SOT-23 MMBT3906LT1G On Semi MMST3904-7-F Diodes, Inc. 1.5 M, 5%, 1/4 W, Thick Film, 1206 ERJ-8GEYJ155V Panasonic 100 k, 5%, 1/4 W, Thick Film, 1206 ERJ-8GEYJ104V Panasonic 2.00 M, 1%, 1/4 W, Metal Film RNF14FTD2M00 Stackpole R7 2.2 M, 5%, 1/4 W, Thick Film, 1206 ERJ-8GEYJ225V Panasonic 1 R9 24.9 k, 1%, 1/4 W, Thick Film, 1206 ERJ-8ENF2492V Panasonic 1 R10 5.1 k, 5%, 1/8 W, Thick Film, 0805 ERJ-6GEYJ512V Panasonic 33 1 R11 95.3 k, 1%, 1/4 W, Metal Film MFR-25FBF-95K3 Yageo 34 1 R12 13 k, 5%, 1/4 W, Thick Film, 1206 ERJ-8GEYJ133V Panasonic 35 2 R13 R14 1 k, 5%, 1/8 W, Thick Film, 0805 ERJ-6GEYJ102V Panasonic 36 1 R15 200 , 1%, 1/8 W, Thick Film, 0805 ERJ-6ENF2000V Panasonic 37 1 R16 10 k, 5%, 1/4 W, Thick Film, 1206 ERJ-8GEYJ103V Panasonic 38 2 R17 R18 39 1 R19 40 1 R20 Page 11 of 50 NPN, Small Signal BJT, 40 V, 0.2 A, SOT-323 51 , 5%, 1/4 W, Carbon Film CFR-25JB-51R Yageo 20 k, 5%, 1/4 W, Thick Film, 1206 ERJ-8GEYJ203V Panasonic 100 , 5%, 1/4 W, Thick Film, 1206 ERJ-8GEYJ101V Panasonic Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 41 1 RV1 42 1 T1 320 V, 80 J, 14 mm, RADIAL Custom Transformer, PQ3230, Vertical, 12 Pins, RD-290 LinkSwitch-PH, eSIP 43 1 U1 44 1 VR1 200 V, 1500 W, TVS, GP-20 45 1 VR3 36 V, 5%, 500 mW, DO-35 6.2 12-Oct-12 V320LA20AP Littlefuse Custom Power Integrations LNK420EG Power Integrations 1.5KE200A-E3/54 Vishay 1N5258B-T Diodes, Inc. Mechanical Bill of Materials Item Qty Ref Des ESIPCLIP M4 METAL1 GREASE1 GREASE2 GREASE3 46 1 47 3 48 1 HS1 49 1 HS2 50 1 51 3 52 3 53 3 JP1 NUT1 NUT2 NUT3 SCREW1 SCREW2 SCREW3 WASHER1 WASHER2 WASHER3 Description Heat Sink Hardware, Edge Clip, 20.76 mm L x 8 mm W x 0.015 mm Thk Thermal Grease, Silicone, 5 oz Tube Heat Sink, RDK290-eSIP, FAB, eSIP with BRKTS, PI Custom Heat Sink, RDK290-Diode, FAB,Diode with BRKTS, PI Custom Wire Jumper, Insulated, 24 AWG, 0.8 in Nut, Hex, Kep 6-32, Zinc Plate SCREW MACHINE PHIL 6-32 X 3/8 SS Washer, Lk, #6 SS,Zinc Plate Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Manufacturer P/N Manufacturer NP975864 Aavid Thermalloy CT40-5 ITW Chemtronics 61-00070-01 Custom 61-00071-01 Custom C2003A-12-02 Gen Cable Any RoHS Compliant Mfg. 6CKNTZR PMSSS 632 0038 PH Building Fasteners 620-6Z Olander Co. Page 12 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 7 Transformer Specification 7.1 Electrical Diagram Figure 5 - Transformer Electrical Diagram. 7.2 Electrical Specifications Electrical Strength Primary Inductance Resonant Frequency Primary Leakage Inductance 7.3 1 second, 60 Hz, from pins 1-6 to pins 7-12 Pins 1-2, all other windings open, measured at 100 kHz, 0.4 VRMS Pins 1-2, all other windings open Pins 1-2, with pins 6-7 shorted, measured at 100kHz, 0.4 VRMS 3000 VAC 1207 H, 10% 1400 kHz (Min.) 15.0 H (Max.) Materials Item [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] Description Core: PC44; PQ3230 Bobbin: RPQ3230 Vertical, 6/6 Pins Magnet Wire: #24 AWG Magnet Wire: #33 AWG Magnet Wire: #22 AWG Triple-insulated Wire Tape: 3M 1298 Polyester Film, 17.7 mm width Tape: 3M 1298 Polyester Film, 36 mm width Tape: 3M 1298 Polyester Film, 10 mm width Copper Tape: 12 mm Varnish Page 13 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 7.4 12-Oct-12 Transformer Build Diagram Figure 6 - Transformer Build Diagram. 7.5 Transformer Construction Bobbin Preparation WDG1 Primary 1 Insulation WDG2 Bias Insulation WDG3 Secondary Insulation WDG4 Primary 2 Insulation Taping Assemble Core Copper Shield Finish Pull-out pin number 4. Position the bobbin such that the pins are on the left side of the bobbin chuck. Machine rotates in forward direction. Start at pin 2; wind with firm tension 28 turns of item [3] from left to right. Finish at pin 3. 2 layers of tape [6] for insulation. Start at pin 6; wind with firm tension 9 trifilar turns of item [4] from left to right. Finish at pin 5. 2 layers of tape [6] for insulation. Start in 2 wires per pin at pin 11 and 12; wind with firm tension 14 quadfilar turns of item [5] in continuously in three layers. Finish at pin 7 and 8. Termination is 2 wires per pin. 2 layers of tape [6] for insulation. Start at pin 3; wind with firm tension 28 turns of item [3] from left to right. Finish at pin 1. 3 layers of tape [6] for insulation. Add 1 layer of tape [7] on the bottom side of the transformer to isolate the core to secondary and primary pins. Refer to figures below: Assemble and secure the cores with 3 layers of tape [8] Add 1 turn of copper shield around the core legs as shown in the illustration. Varnish transformer assembly. Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 14 of 50 12-Oct-12 7.6 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) Transformer Core Wrapping Process Step 1. Position the core at the center of 60 mm x 36 mm polyester film tape [7] Step 2. Fold both ends of the tape into the sides of the core as shown in the illustration. Make sure that no excess tape higher than the core. Step 3. Fold the tape in the 4 corners of the core. Extend the folding down to the bottom of the tape until it locks. Page 15 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 Step 4. Cut the center of the bottom tape on its 2 sides. Step 5. Fold the tape into the legs of the core as shown in the illustration. Same procedure is applied to the other side of the core. Step 6. Insert the wrapped core into the bottom side of the bobbin. Make sure that the tape is inserted between the core and the bobbin as shown in the figure. Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 16 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) Step 7. Grind the top portion of the core to set the inductance as required. Assemble and fix the cores as shown in the illustration. Varnish. Step 8. Add 1 turn of copper shield as shown in the illustration. Solder the end of the copper shield. Varnish. Figure 7 - Core Wrapping and Shielding Illustration. Page 17 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 8 Transformer Design Spreadsheet ACDC_LinkSwitch-PH 032511; Rev.1.3; INPUT Copyright Power Integrations 2011 ENTER APPLICATION VARIABLES Dimming required NO VACMIN VACMAX fL VO 36.00 VO_MAX 36.00 VO_MIN 29.00 V_OVP IO 2.10 PO n 0.92 VB ENTER LinkSwitch-PH VARIABLES LinkSwitch-PH LNK410 Chosen Device Current Limit Mode ILIMITMIN ILIMITMAX fS fSmin fSmax IV RV RV2 IFB RFB1 INFO FULL 4.2 190 VDS OUTPUT UNIT NO 190 300 50 36.00 29.00 39.60 75.6 0.92 20 LNK410 Power Out V V Hz V V V V A W V Universal 85W FULL 5.30 6.20 66000 62000 70000 78.4 4 1.402 190 89.5 A A Hz Hz Hz uA M-ohms M-ohms uA k-ohms 10 V VD 0.50 V VDB Key Design Parameters 0.70 V KP 0.56 056 130.00 1205 130 uH V Expected IO (average) 2.06 A KP_VACMAX 0.72 TON_MIN 3.55 LP VOR PCLAMP 0.67 ENTER TRANSFORMER CORE/CONSTRUCTION VARIABLES Core Type PQ3230 PQ3230 PQ3230/ Bobbin 12pins AE 1.6700 1.67 LE 7.5000 7.5 AL 4500.0 4500 BW 17.0 17 M 0 L 2.00 NS 14 DC INPUT VOLTAGE PARAMETERS 2 14 Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Us W cm^2 Cm nH/T^2 Mm Mm LinkSwitch-PH_032511: Flyback Transformer Design Spreadsheet Select 'YES' option if dimming is required. Otherwise select 'NO'. Minimum AC Input Voltage Maximum AC input voltage AC Mains Frequency Typical output voltage of LED string at full load Maximum expected LED string Voltage. Minimum expected LED string Voltage. Over-voltage protection setpoint Typical full load LED current Output Power Estimated efficiency of operation Bias Voltage 115 Doubled/230V 6.8W Select "RED" for reduced Current Limit mode or "FULL" for Full current limit mode Minimum current limit Maximum current limit Switching Frequency Minimum Switching Frequency Maximum Switching Frequency V pin current Upper V pin resistor Lower V pin resistor FB pin current (85 uA < IFB < 210 uA) FB pin resistor LinkSwitch-PH on-state Drain to Source Voltage Output Winding Diode Forward Voltage Drop (0.5 V for Schottky and 0.8 V for PN diode) Bias Winding Diode Forward Voltage Drop Ripple to Peak Current Ratio (For PF > 0.9, 0.4 < KP < 0.9) Primary Inductance Reflected Output Voltage. Expected Average Output current is outside 5% tolerance band. Change IFB to 206 for better current regulation set-point Expected ripple current ratio at VACMAX Minimum on time at maximum AC input voltage Estimated dissipation in primary clamp 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 Page 18 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) VMIN VMAX CURRENT WAVEFORM SHAPE PARAMETERS DMAX IAVG 269 424 V V 0.33 0.42 A IP 2.21 A IRMS 0.73 A TRANSFORMER PRIMARY DESIGN PARAMETERS LP NP NB ALG 1207 50 9 385 uH Peak input voltage at VACMIN Peak input voltage at VACMAX Minimum duty cycle at peak of VACMIN Average Primary Current Peak Primary Current (calculated at minimum input voltage VACMIN) Primary RMS Current (calculated at minimum input voltage VACMIN) Primary Inductance Primary Winding Number of Turns Bias Winding Number of Turns nH/T^2 Gapped Core Effective Inductance Maximum Flux Density at PO, VMIN BM Gauss 2849 (BM<3100) BP 3525 Gauss Peak Flux Density (BP<3700) AC Flux Density for Core Loss Curves (0.5 X BAC Gauss 798 Peak to Peak) ur 1608 Relative Permeability of Ungapped Core LG 0.50 mm Gap Length (Lg > 0.1 mm) BWE 34 mm Effective Bobbin Width Maximum Primary Wire Diameter including OD mm 0.61 insulation Estimated Total Insulation Thickness (= 2 * film INS mm 0.07 thickness) DIA 0.54 mm Bare conductor diameter Primary Wire Gauge (Rounded to next smaller AWG AWG 24 standard AWG value) CM 406 Cmils Bare conductor effective area in circular mils !!! DECREASE CMA (200 < CMA < 600) CMA Cmils/Amp Decrease L(primary layers),increase 555 NS,smaller Core LP_TOL 10 10 Tolerance of primary inductance TRANSFORMER SECONDARY DESIGN PARAMETERS (SINGLE OUTPUT EQUIVALENT) Lumped parameters ISP 8.83 A Peak Secondary Current ISRMS 3.80 A Secondary RMS Current IRIPPLE 3.17 A Output Capacitor RMS Ripple Current Secondary Bare Conductor minimum circular CMS Cmils 760 mils Secondary Wire Gauge (Rounded up to next AWGS AWG 21 larger standard AWG value) DIAS 0.73 mm Secondary Minimum Bare Conductor Diameter Secondary Maximum Outside Diameter for ODS mm 1.21 Triple Insulated Wire VOLTAGE STRESS PARAMETERS Estimated Maximum Drain Voltage assuming VDRAIN V maximum LED string voltage (Includes Effect 692 of Leakage Inductance) Output Rectifier Maximum Peak Inverse PIVS V Voltage (calculated at VOVP, excludes 146 leakage inductance spike) Bias Rectifier Maximum Peak Inverse Voltage PIVB V (calculated at VOVP, excludes leakage 92 inductance spike) FINE TUNING (Enter measured values from prototype) V pin Resistor Fine Tuning RV1 4.00 M-ohms Upper V Pin Resistor Value RV2 1.40 M-ohms Lower V Pin Resistor Value VAC1 115.0 V Test Input Voltage Condition1 VAC2 230.0 V Test Input Voltage Condition2 IO_VAC1 2.10 A Measured Output Current at VAC1 IO_VAC2 2.10 A Measured Output Current at VAC2 RV1 (new) 4.00 M-ohms New RV1 RV2 (new) 1.40 M-ohms New RV2 Page 19 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) V_OV 325.6 V V_UV 72.4 V 93.1 1E+12 16.0 20.0 2.10 2.10 99.8 1.39E+01 k-ohms k-ohms V V A A k-ohms k-ohms FB pin resistor Fine Tuning RFB1 93.1 RFB2 1.30E+01 VB1 19.01 VB2 19.13 IO1 2.394 IO2 2.343 RFB1 (new) RFB2(new) Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com 12-Oct-12 Typical AC input voltage at which OV shutdown will be triggered Typical AC input voltage beyond which power supply can startup Upper FB Pin Resistor Value Lower FB Pin Resistor Value Test Bias Voltage Condition1 Test Bias Voltage Condition2 Measured Output Current at Vb1 Measured Output Current at Vb2 New RFB1 New RFB2 Page 20 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 9 Heat Sink Assemblies 9.1 Diode Heat Sink 9.1.1 Diode Heat Sink Drawing Page 21 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 9.1.2 Diode Heat Sink Fabrication Drawing Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 22 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 9.1.3 Diode and Heat Sink Assembly Drawing Page 23 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 9.2 12-Oct-12 eSIP Heat Sink 9.2.1 eSIP Heat Sink Drawing Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 24 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 9.2.2 eSIP Heat Sink Fabrication Drawing Page 25 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 9.2.3 eSIP and Heat Sink Assembly Drawing Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 26 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 10 Performance Data All measurements performed at 25C room temperature, 50 Hz input frequency otherwise specified. 10.1 Active Mode Efficiency Figure 8 - Efficiency with Respect to AC Input Voltage. Page 27 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 10.2 Line Regulation Figure 9 - Line Regulation, Room Temperature. Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 28 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 10.3 Power Factor Figure 10 - High Power Factor within the Operating Range. Page 29 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 10.4 %THD Figure 11 - Very Low %ATHD within the Operating Range. Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 30 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 10.5 Harmonic Currents The design met the limits for Class C equipment1 for an active input power of >25 W. VAC (VRMS) 230 nth Order 1 2 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 Freq (Hz) 50.00 mA Content 324.20 0.60 38.80 15.70 9.10 6.50 5.30 4.60 4.40 3.40 3.40 2.70 2.40 2.00 1.70 1.50 1.30 1.10 0.80 1.00 0.70 0.70 0.60 0.70 0.50 I (mA) 357.23 % Content 0.19% 11.97% 4.84% 2.81% 2.00% 1.63% 1.42% 1.36% 1.05% 1.05% 0.83% 0.74% 0.62% 0.52% 0.46% 0.40% 0.34% 0.25% 0.31% 0.22% 0.22% 0.19% 0.22% 0.15% P (W) 80.6300 Limit >25 W 2.00% 29.46% 10.00% 7.00% 5.00% 3.00% 3.00% 3.00% 3.00% 3.00% 3.00% 3.00% 3.00% 3.00% 3.00% 3.00% 3.00% 3.00% 3.00% 3.00% PF 0.9819 Remarks Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Table 1 - Meets EN61000-3-2 Harmonics Contents Standards for >25 W Rating. 31 V LED String. 1 IEC6000-3-2 Section 7.3, Table 2. Page 31 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 Figure 12 - Meets EN61000-3-2 Harmonics Contents Standards for >25 W Rating. 31 V LED String. Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 32 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 11 Thermal Performance 11.1 Equipment Used Chamber: AC Source: Wattmeter: Data Logger: Tenney Environmental Chamber Model No: TJR-17 942 Chroma Programmable AC Source Model No: 6415 Yokogawa Power Meter Model No: WT2000 Monogram SN:1290492 Figure 13 - Thermal Chamber Set-up Showing Box Used to Prevent Airflow Over UUT. 11.2 Thermal Result Load: 36 V / 2.08 A LED load Normal Operation Component Box Internal Ambient (C) Transformer (T1) Output Capacitor (C17) Common Mode Choke (L1) Bridge (BR1) Snubber TVS (VR1) LNK420EG (U1) Output Diode (D9) Output Diode (D10) Device Temperature (C) 180 V / 50 Hz 230 V / 50 Hz 265 V / 50 Hz Max OTP Max OTP Max OTP 70.0 89.2 70.0 96.4 70.0 95.5 81.1 105.4 80.9 105.9 84.8 109.8 78.2 96.5 74.4 100.5 77.4 102 79.7 98.4 73.8 100.6 75.2 100.7 100.4 119.3 92.1 118.2 92.4 118.0 100.1 119.5 94.4 119.8 93.3 118.6 110.2 131.0 103.1 130.8 104.0 131.2 90.7 109.1 88.2 113.0 90.5 115.0 95.4 113.9 93.3 118.0 95.7 120.2 OTP: The ambient temperature was raised until the internal Over-Temperature-Protection of the IC (U1) triggered. Page 33 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 11.3 Thermal Scan The scan is conducted at ambient temperature of 25C, 180 VAC / 50 Hz input and 36 V LED string load. Figure 14 - LNK420EG (U1) Case Temperature. Figure 15 - Bridge Case BR1 (Sp1) and CMC Core L1 (Sp2) Temperature. Figure 16 - Transformer Core T1 (Sp1) Temperature. Figure 17 - TVS Diode VR1 (Sp1) and Snubber Diode D3 (Sp2) Case Temperature. Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 34 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) Figure 18 - Output Diode D9, D10 (Sp1, Sp2) Case and Secondary Snubber R17, R19 (Sp3, Sp4) Temperature. Figure 19 - Blocking Diode D4 (Sp1) Case Temperature. Figure 20 - Overall Board Thermal Image. Page 35 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 12 Waveforms 12.1 Drain Voltage and Current, Normal Operation Figure 21 - 300 VAC / 63 Hz, 36 V LED String. Measured VDRAIN Stress: 621 V. Ch1: VDRAIN, 200 V / div. Ch4: IDRAIN, 01 A / div.,5 s / div. Figure 22 - 300 VAC / 63 Hz, 36 V LED String. Measured VDRAIN Stress: 634 V. Ch1: VDRAIN, 200 V / div. Ch4: IDRAIN, 1 A / div.,1 ms / div. 12.2 Drain Voltage and Current, Start-up Operation Figure 23 - 300 VAC / 63 Hz, 36 V LED String. Measured VDRAIN Stress: 621 V. Ch1: VDRAIN, 200 V / div. Ch4: IDRAIN, 1 A / div., 10 ms / div. Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Figure 24 - 300 VAC / 63 Hz, 36 V LED String. Measured VDRAIN Stress: 595 V. Ch1: VDRAIN, 200 V / div. Ch4: IDRAIN, 01 A / div., 10 ms / div. Page 36 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12.3 Drain Voltage and Current, Output Short Figure 25 - 300 VAC / 63 Hz, Output Short. Measured VDRAIN Stress: 621 V Maximum IDRAIN: 6.14 A. Ch1: VDRAIN, 200 V / div. Ch4: IDRAIN, 2 A / div., 10 ms / div. Figure 26 - 300 VAC / 63 Hz, Output Short. Measured VDRAIN Stress: 621 V Maximum IDRAIN: 6.14 A. Ch1: VDRAIN, 200 V / div. Ch4: IDRAIN, 2 A / div., 10 ms / div. 12.4 Output Voltage and Output Current Start-up Profile Figure 27 - 180 VAC / 50 Hz, 32 V LED String. Ch1: VIN, 500 V / div. Ch2: VOUT, 5 V / div. Ch4: IOUT, 0.5 A / div., 50 ms / div. Page 37 of 50 Figure 28 - 300 VAC / 50 Hz, 32 V LED String. Ch1: VIN, 500 V / div. Ch2: VOUT, 5 V / div. Ch4: IOUT, 0.5 A / div., 50 ms / div. Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 12.5 Output Current at Normal Operation Figure 29 - 180 VAC / 50 Hz, 31 V LED String. Ch1: VIN, 500 V / div. Ch2: VOUT, 5 V / div. Ch4: IOUT, 0.5 A / div., 50 ms / div. Figure 30 - 300 VAC / 50 Hz, 31 V LED String. Ch1: VIN, 500 V / div. Ch2: VOUT, 5 V / div. Ch4: IOUT, 0.5 A / div., 50 ms / div. 12.6 Line Transient Response Figure 31 - 230 VAC / 50 Hz, 1 s On - 1 s Off. Load: 32 V LED String. Ch1: VIN, 200 V / div. Ch4: IOUT, 500 mA / div., 1 s / div. Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Figure 32 - 180-300-180 VAC / 50 Hz, 1 s Pulse. Load: 32 V LED String. Ch1: VIN, 200 V / div. Ch4: IOUT, 500 mA / div., 200 ms / div. Page 38 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12.7 Start-up No-load and Normal Operation then No-load This LED driver is protected by latching OVP circuit and resettable through AC recycle. No component failure was observed. Figure 33 - 300 VAC / 63 Hz Start-up No-load; Ch1: VOUT, 10 V / div. Ch4: IOUT, 1 mA / div., 20 s / div. Figure 34 - 300 VAC / 63 Hz, Load is Removed; Ch1: VOUT, 10 V / div. Ch4: IOUT, 1 A / div., 20 s / div. 12.8 Secondary Diode Voltage Stress Figure 35 - 300 VAC / 63 Hz, Measured Secondary Voltage Stress: 192 V. Ch1: VSEC_DIODE, 50 / div., 500 ns / div. Page 39 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 12.9 Line Surge Waveform Figure 36 - 230 VAC / 60 Hz, 2 kV Differential Surge. Voltage Stress (U1): 690 V. Ch1: VBULK, 200 V / div. Ch3: VSOURCE, 200 V / div., 100 s / div. Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 40 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 13 Line Surge Input voltage was set at 230 VAC / 60 Hz. Output was loaded with 32 V LED string and operation was verified following each surge event. Differential input line 1.2 / 50 s surge testing was completed on two test unit to IEC61000-4-5. Surge Level (kV) +2 -2 +2 -2 +4 -4 +4 -4 +4 -4 +4 -4 Input Voltage (VAC) 230 230 230 230 230 230 230 230 230 230 230 230 Injection Location L1 to L2 L1 to L2 L1 to L2 L1 to L2 L1-PE L1-PE L1-PE L1-PE L2-PE L2-PE L2-PE L2-PE Injection Phase () 0 0 90 90 0 0 90 90 0 0 90 90 Test Result (Pass/Fail) Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Differential input line ring surge testing was completed on two test unit to IEC61000-4-5. Ring Surge Level (kV) +2.5 -2.5 +2.5 -2.5 Input Voltage (VAC) 230 230 230 230 Injection Location L1 to L2 L1 to L2 L1 to L2 L1 to L2 Injection Phase () 0 0 90 90 Test Result (Pass/Fail) Pass Pass Pass Pass Unit was operating normally under all test conditions. Page 41 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 14 Conducted EMI 14.1 Equipment Receiver: Rohde & Schwartz ESPI - Test Receiver (9 kHz - 3 GHz) Model No: ESPI3 LISN: Rohde & Schartz Two-Line-V-Network Model No: ENV216 14.2 EMI Test Set-up LED driver is placed in a conical metal housing (for self-ballasted lamps; CISPR15 Edition 7.2). Figure 37 - Conducted Emissions Measurement Set-up. Showing Down Light Fixture which UUT was Mounted. Figure 38 - UUT is Mounted Inside the Down Light Fixture in 3 Conditions: 3 Wire - Chassis Grounded to Earth, 3 Wire Chassis Floating and 2 Wire Connection. Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 42 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) Power Integrations 15.May 12 18:41 RBW MT 9 kHz 500 ms Att 10 dB AUTO dBV 120 EN55015Q 110 1 QP CLRWR 100 kHz LIMIT CHECK 1 MHz PASS 10 MHz SGL 100 90 2 AV CLRWR TDF 80 70 60 50 EN55015A 6DB 40 30 20 10 0 -10 -20 9 kHz 30 MHz Figure 39 - Conducted EMI, Maximum Steady-State Load, 230 VAC, 60 Hz, and EN55015 Limits. 2-Wire Configuration (L-N). Page 43 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 Figure 40 - Conducted EMI Margin for the Above Scan. Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 44 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) Power Integrations 16.May 12 08:46 RBW MT 9 kHz 500 ms Att 10 dB AUTO dBV 120 EN55015Q 110 1 QP CLRWR 100 kHz LIMIT CHECK 1 MHz PASS 10 MHz SGL 100 90 2 AV CLRWR TDF 80 70 60 50 EN55015A 6DB 40 30 20 10 0 -10 -20 9 kHz 30 MHz Figure 41 - Conducted EMI, Maximum Steady-State Load, 230 VAC, 60 Hz, and EN55015 Limits. 3-Wire Configuration (L-N-Earth), Chassis Connected to Earth Terminal. Page 45 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 Figure 42 - Conducted EMI Margin for the Above Scan. Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 46 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) Power Integrations 16.May 12 09:43 RBW MT 9 kHz 500 ms Att 10 dB AUTO dBV 120 EN55015Q 110 1 QP CLRWR 100 kHz LIMIT CHECK 1 MHz PASS 10 MHz SGL 100 90 2 AV CLRWR TDF 80 70 60 50 EN55015A 6DB 40 30 20 10 0 -10 -20 9 kHz 30 MHz Figure 43 - Conducted EMI, Maximum Steady State Load, 230 VAC, 60 Hz, and EN55015 Limits. 3-Wire Configuration (L-N-Earth), Chassis Floating. Page 47 of 50 Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 Figure 44 - Conducted EMI Margin for the Above Scan. 3-Wire Configuration (L-N-Earth), Chassis Floating. Power Integrations, Inc. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com Page 48 of 50 12-Oct-12 RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 15 Revision History Date 04-Jun-12 12-Oct-12 Page 49 of 50 Author JD KM Revision 1.1 1.2 Description and Changes Initial Release Updated Power Supply Specification Table Reviewed Apps & Mktg Power Integrations Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-290 LNK420EG (29 V - 36 V / 2.1 A 75 W Output) 12-Oct-12 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 NON-INFRINGEMENT 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, PeakSwitch, CAPZero, SENZero, LinkZero, HiperPFS, HiperTFS, HiperLCS, Qspeed, EcoSmart, Clampless, E-Shield, Filterfuse, StackFET, PI Expert and PI FACTS are trademarks of Power Integrations, Inc. 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