Application Note 1854 ISL1903DEMO1Z: Offline Triac Dimmable LED Driver Introduction Design Specifications ISL1903DEMO1Z evaluation board converts a low line AC input voltage (120V) to a 42V, 350mA constant current output to drive LEDs. It is implemented with Intersil's critical conduction mode (CrCM) single ended buck controller, the ISL1903. It demonstrates fundamental functions of the ISL1903, including soft-start, triac dimming, overvoltage protection, short circuit protection, etc. The circuit operates in CrCM with variable frequency and allows for near zero-voltage switching (ZVS). Typical efficiency is about 87% at full load. This application note covers the test setup, performance data, dimming data, schematics, layout and BOM. * Input voltage VIN: 96V to 144V * Output voltage VO: 28V to 42V * Output current IO: 350mA (14W) * Board dimensions: 55x26x15mm3 (LxWxH) * Input power factor greater than 0.95 * Total harmonic distortion less than 15% * Peak efficiency at full load: 87% * 0-100% dimming with leading and trailing edge dimmers 42V, 350mA LED + LED Driver with Triac Dimming 10K 0805 R25 LINE R53 F1 10mH L2 630V 4700pF, 5% C9 305V 680nF, 20% R1e 0O 2512 ~ L3 LED Load 50V 270uF, 20% 50V 1uF, 10% 10O 0805 Q2 400V 47nF, 10% 2SK3471 Vdrain 600V, 1A MB6S BAV70 70V, 0.2A D2 NEUTRAL R27 C19 C3 220uH 2.3:1 (Pri:Aux) Aux C1 ~ _ R1a 680O 2512 10mH D4 R11 510K 0805 + 250V 330nF, 10% RV1 275V, 23J V275LA4P D1 200V, 3A STTH2R02A-T 100O axial R8 C1a C7 120V AC, 60Hz R9 510K 0805 250V, 2.5A 10K 0805 D1a R29 R10 10O 0805 R5 R30 D12 LED Q1 21.5K 0603 13V Zener T1 400V, 5.4A TK8P25DA or STD7NK40ZT4 R12 499O 0603 MCL4448 0.22O 1206 1.58K 0603 50V 10pF, 10% C18 acp R1c DNP OUT 16 1 VDD ISL1903DEMO1Z Rev A R19 R1d 16V 100nF, 10% 4.99K 0603 R52 C12 C13 C6 4 IOUT GND 13 R1b 21.5K 0603 acp AC 12 6 OC OVP 11 7 FB RAMP 10 8 DELADJ VERR 9 300K 1206 ISL1903 R20 C4 R16 21.5K 0603 16V 100nF, 10% 100O 0805 DHC 14 5 CS+ 510K 0603 100K 0603 3 VREF Vdrain R14 NC NC 2 OFFREF PWMOUT 15 R13 43K 0603 C17 R15 R3 C5 C2 50V 1000pF, 5% 16V 0.47uF, 10% 50V 100pF, 5% 25V 25V 33uF, 20% 33uF, 20% 1.58K 0603 3K 0603 FIGURE 1. AC BUCK CONVERTER APPLICATION SCHEMATIC ISL1903DEMO1Z Rev A ISL1903DEMO1Z Rev A LINE LINE LED Driver Dimmer LED + AC LINE LED Vout LOAD Vin AC LINE Vin LED Driver LED + Vout LED LOAD LED - LED - NEUTRAL NEUTRAL FIGURE 2. TEST SETUP WITH AND WITHOUT DIMMING June 14, 2013 AN1854.0 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2013. All Rights Reserved Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. Application Note 1854 FIGURE 3. TOP/BOTTOM VIEW OF THE EVALUATION BOARD Schematic Description The ISL1903 is a high-performance, critical conduction mode (CrCM), single-ended buck LED driver controller. It supports single-stage conversion of the AC mains to a constant current source with power factor correction (PFC). It also may be used with DC input converters. The ISL1903 supports buck converter topologies, such as isolated forward converters or non-isolated source return buck converters. Operation in CrCM allows near zero-voltage switching (ZVS) for improved efficiency while maximizing magnetic core utilization. The ISL1903 LED driver provides all of the features required for high-performance dimmable LED ballast designs. Input EMI Filtering Inductors L2, L3 and capacitors C7, C9 filter the switching current to the AC line. Resistors R25, R27 dampen the resonance of the EMI filter, preventing peaks in the conducted EMI spectrum. MOV RV1 clamps the maximum line voltages during line surge events. Bridge rectifier D1 rectifies the AC line voltage. Fuse F1 provides overload protection from the AC mains. Start-up Network R8, R53, R9, Q2 and D2 constitute the linear regulator circuit which is used during startup. Once the energy is built and voltage is generated on the aux winding, the linear regulator circuit is disabled and the auxiliary winding supplies the VDD and current to the IC. Power Stage Q1, D4, T1 (coupled inductor) and C3 are the AC buck converter components. The source of the main MOSFET Q1 is tied to ground and a high voltage level shifter is not needed as is the case in a buck converter. Near zero voltage switching (ZVS) or quasi-resonant switching, as it is sometimes referred to, can be achieved in the buck topology by delaying the next switching cycle after the inductor current decays to zero (critical conduction mode). The delay allows the inductance and parasitic capacitance to oscillate, causing the switching FET drain-source voltage to ring down to minima. If the FET is turned on at this minima, the capacitive switching losses 2 1 --- CV are greatly reduced. 2 2 Inductance Calculation TABLE 1. BUCK CONVERTER ELECTRICAL PARAMETERS NAME VALUE VINmin(rms) 96V VINmax(rms) 144V VOUT 42V IOUT 350mA Fmin(avg) 90kHz Inductance value is important in operating the buck converter in critical conduction mode. The desired inductance is calculated using Equation 1: V OUT V IN rms - V OUT L = ------------------------------------------------------------------------------------2 f min I OUT V IN rms 2 (EQ. 1) H where VOUT is the LED string voltage, VIN is the rms input voltage, IOUT is the current through the LED string and fmin is the chosen minimum frequency at minimum VIN. Plugging in the values from Table 1 into Equation 1 provides: 42 96 - 42 L = ---------------------------------------------------------------- H = 265H 2 90k 0.35 96 2 (EQ. 2) The above equation calculates the required inductance when operating at the DC equivalent input voltage. It does not take into account the reduction in conduction angle that occurs when the instantaneous input voltage is less the output voltage. Equation 3 corrects for this. V OUT - 2 arc sin ----------------------- V IN 2 L buck = L ----------------------------------------------------------------- H (EQ. 3) 42 - 2 asin -------------------- 96 2 L buck = 265H --------------------------------------------------------- = 239H 220H inductor is selected for this application. The auxiliary winding is used to detect inductor zero-current for critical conduction mode operation. R29, R12 and D12 scale down the sensed zero crossing voltage and applied to the IC. Deladj sets delay before a new switching cycles starts. This adjustment allows the user to delay the next switching cycle until the switching FET drain-source voltage reaches a minimum value to allow quasi-ZVS (Zero Voltage Switching) operation. Resistor R16 to ground programs the delay. AN1854.0 June 14, 2013 Application Note 1854 Performance Data TABLE 2. PERFORMANCE DATA- 14 LED LOAD TABLE 4. PERFORMANCE DATA - 10 LED LOAD VIN (V) PIN (W) VO (V) IO (mA) PO (W) PF (V/V) THD (%) (%) VIN (V) PIN (W) VO (V) IO (mA) PO (W) PF (V/V) THD (%) (%) 90 15.79 40.89 332.79 13.61 0.983 16.32 86.20 90 11.44 29.43 332.90 9.8 0.99 9.8 85.61 100 15.61 40.88 331.10 13.54 0.985 13.62 86.72 100 11.40 29.43 332.50 9.78 0.99 9.10 85.81 110 15.55 40.88 330.53 13.51 0.986 11.68 86.92 110 11.42 29.42 332.64 9.79 0.98 8.98 85.68 120 15.58 40.88 330.63 13.52 0.98 10.17 86.77 120 11.46 29.42 333.24 9.8 0.98 9.10 85.54 130 15.60 40.88 331.16 13.54 0.98 9.12 86.76 130 11.52 29.42 334.15 9.83 0.97 9.38 85.35 140 15.67 40.88 332.00 13.57 0.98 8.35 86.60 140 11.61 29.42 335.26 9.86 0.96 9.41 84.97 VIN (V) PIN (W) VO (V) IO (mA) PO (W) PF (V/V) THD (%) (%) 90 13.67 35.30 333.84 11.79 0.99 12.69 86.24 100 13.59 35.29 332.8 11.75 0.99 10.87 86.42 110 13.58 35.28 332.55 11.73 0.99 9.63 86.39 120 13.59 35.27 332.90 11.74 0.98 8.77 86.40 130 13.64 35.26 333.62 11.77 0.98 8.60 86.24 140 13.75 35.26 334.54 11.8 0.97 8.38 85.80 TABLE 3. PERFORMANCE DATA - 12 LED LOAD Performance Curves 30 100 25 98 10 LEDs 20 12 LEDs 96 THD (%) POWER FACTOR (V/V) (%) 14 LEDs 94 15 14 LEDs 10 12 LEDs 92 90 10 LEDs 5 90 100 110 120 130 0 140 90 100 110 LINE VOLTAGE (V) 120 130 140 LINE VOLTAGE (V) FIGURE 4. POWER FACTOR vs LINE VOLTAGE FIGURE 5. THD WITH LINE VARIATION 90 336 89 OUTPUT CURRENT (mA) EFFICIENCY (%) 88 14 LEDs 87 86 85 10 LEDs 12 LEDs 84 83 334 10 LEDs 12 LEDs 332 82 14 LEDs 81 80 90 100 110 120 130 LINE VOLTAGE (V) FIGURE 6. EFFICIENCY vs LINE VOLTAGE 3 140 33090 100 110 120 130 140 LINE VOLTAGE (V) FIGURE 7. OUTPUT CURRENT VARIATION WITH LINE AN1854.0 June 14, 2013 Application Note 1854 Key Waveforms WAVEFORMS DEPICTING INPUT VOLTAGE AND CURRENT INPUT VOLTAGE INPUT VOLTAGE AND CURRENT DURING STARTUP INPUT VOLTAGE INPUT CURRENT INPUT CURRENT FIGURE 8. INPUT VOLTAGE AND CURRENT WAVEFORMS WITH NO DIMMER CONNECTED; TRACE 3: INPUT VOLTAGE (70V/DIV); TRACE 4: INPUT CURRENT (100mA/DIV) OUTPUT VOLTAGE AND CURRENT DURING STARTUP OUTPUT VOLTAGE LED CURRENT FIGURE 10. OUTPUT VOLTAGE AND CURRENT DURING STARTUP; TRACE 3: OUTPUT VOLTAGE (8V/DIV); TRACE 4: OUTPUT CURRENT (100mA/DIV) 4 FIGURE 9. INPUT VOLTAGE AND CURRENT DURING STARTUP; TRACE 3: INPUT VOLTAGE (70V/DIV); TRACE 4: INPUT CURRENT (100mA/DIV) LED CURRENT RIPPLE OUTPUT VOLTAGE LED CURRENT FIGURE 11. OUTPUT VOLTAGE AND CURRENT; TRACE 3: OUTPUT VOLTAGE (8V/DIV); TRACE 4: OUTPUT CURRENT (100mA/DIV) AN1854.0 June 14, 2013 Application Note 1854 Key Waveforms (Continued) ZERO-VOLTAGE SWITCHING SWITCHING WAVEFORMS RECTIFIED AC DRAIN DRAIN GATE GATE LED CURRENT FIGURE 12. TRACE 1: DRAIN VOLTAGE (70V/DIV); TRACE 2: GATE VOLTAGE (9V/DIV); TRACE 3: RECTIFIED AC VOLTAGE (80V/DIV); TRACE 4: OUTPUT CURRENT (300mA/DIV) FIGURE 13. TRACE 1: DRAIN VOLTAGE (60V/DIV); TRACE 2: GATE VOLTAGE (7V/DIV) Dimming Compatibility The requirement to provide dimming with low cost, triac based dimmers introduced trade-offs in the design. Due to lower power consumption by LED lighting, the input current drawn by the lamp during triac based dimming is below the holding current of triac dimmers. This causes the triac to trigger inconsistently and causes flickering and/or limited dimming range. Large impedance presented to the line by the LED driver allows significant ringing to occur due to inrush current charging the input capacitance when triac turns on. This can cause undesirable operation as the ringing may cause the triac current to fall to zero and turn off prematurely. To overcome these issues, an active dimmer current holding circuit (DHC pin, R17) and a passive damping circuit (C1a, R1a) are incorporated into the design. These circuits result in increased power dissipation and hence reduce electrical efficiency and overall lamp efficacy. For non-dimming applications, these circuits can be omitted. ISL1903EVAL1Z evaluation board has been tested against the following common dimmers available in the market. 1. Leviton 6602-1W 2. Leviton Truetouch TT106-1 3. Lutron DVCL-153P TABLE 5. DIMMING DATA % OF OUTPUT CURRENT AS PERCEIVED BY HUMAN EYE (%) CONDUCTION ANGLE (%) OUTPUT CURRENT (mA) % OF OUTPUT CURRENT MEASURED (%) 100 348 100.0 100.0 90 348 100.0 100.0 85.2 348 100.0 100.0 80.62 348 100.0 100.0 64.2 247 70.98 84.25 50.4 158 45.4 67.38 39.12 106 30.46 55.19 32.16 75 21.55 46.42 26.16 46 13.22 36.36 13.44 7.7 2.21 14.87 12 1.6 0.46 6.78 8.4 0 0 0 0 0 0 0 4. Luton CTCL-153P 5. Leviton Decora slide dimmer 6. Lutron Skylar S-600 5 AN1854.0 June 14, 2013 Application Note 1854 Dimming Curve 400 OUTPUT CURRENT (mA) 350 300 250 200 150 100 50 0 0 10 20 30 40 50 60 70 80 90 100 CONDUCTION ANGLE (%) FIGURE 14. DIMMING CURVE - LEADING EDGE DIMMER Dimming Waveforms WAVEFORM SHOWING LINE VOLTAGE AND CURRENT; CONDUCTION ANGLE: 85.2% INPUT VOLTAGE INPUT CURRENT FIGURE 15. TRACE 3: INPUT VOLTAGE (100V/DIV); TRACE 4: INPUT CURRENT (100mA/DIV) 6 WAVEFORM SHOWING LINE VOLTAGE AND CURRENT; CONDUCTION ANGLE: 57.2% INPUT VOLTAGE INPUT CURRENT FIGURE 16. TRACE 3: INPUT VOLTAGE (100V/DIV); TRACE 4: INPUT CURRENT (100mA/DIV) AN1854.0 June 14, 2013 Application Note 1854 Dimming Waveforms (Continued) WAVEFORM SHOWING LINE VOLTAGE AND CURRENT; CONDUCTION ANGLE: 34.09% WAVEFORM SHOWING LINE VOLTAGE AND CURRENT; CONDUCTION ANGLE: 21.6% INPUT VOLTAGE INPUT VOLTAGE INPUT CURRENT INPUT CURRENT FIGURE 17. TRACE 3: INPUT VOLTAGE (100V/DIV); TRACE 4: INPUT CURRENT (100mA/DIV) FIGURE 18. TRACE 3: INPUT VOLTAGE (100V/DIV); TRACE 4: INPUT CURRENT (100mA/DIV) WAVEFORM SHOWING LINE VOLTAGE AND CURRENT; CONDUCTION ANGLE: 12.96% INPUT VOLTAGE INPUT CURRENT FIGURE 19. TRACE 3: INPUT VOLTAGE (100V/DIV); TRACE 4: INPUT CURRENT (100mA/DIV) 7 AN1854.0 June 14, 2013 Application Note 1854 Overvoltage Protection OVP - NO LOAD CONDITION OVP - NORMAL OPERATION VDD VDD OVP OUTPUT CURRENT OUTPUT CURRENT OVP FIGURE 20. TRACE 1: VDD (9V/DIV); TRACE 2: OVP (500mV/DIV); TRACE 4: LED CURRENT (200mA/DIV) FIGURE 21. TRACE 1: VDD (9V/DIV); TRACE 2: OVP (500mV/DIV); TRACE 4: LED CURRENT (80mA/DIV) Short Circuit Protection VDD VOLTAGE OUTPUT VOLTAGE OUTPUT CURRENT FIGURE 22. TRACE 1: VDD (8V/DIV); TRACE 3: OUTPUT VOLTAGE (20V/DIV); TRACE 4: LED CURRENT (800mA/DIV) 8 AN1854.0 June 14, 2013 Application Note 1854 EMI Results - Cispr 22 Class B QUASI PEAK AVERAGE FIGURE 23. LINE AT 120V, 60Hz QUASI PEAK AVERAGE FIGURE 24. NEUTRAL AT 120V, 60Hz TABLE 6. QUASI PEAK AND AVERAGE READINGS CLASS B FREQUENCY (MHz) LEVEL (dBV) AC LINE LIMIT MARGIN DETECTOR (QP/AVG) 0.175 53.5 Line 1 64.7 -11.2 QP 0.175 52.9 Neutral 64.7 -11.8 QP 0.183 51.8 Neutral 64.3 -12.5 QP 0.185 51.6 Line 1 64.3 -12.7 QP 0.175 39.4 Line 1 54.7 -15.3 AVG 0.175 38.7 Neutral 54.7 -16.0 AVG 0.213 46.9 Neutral 63.1 -16.2 QP 0.183 37.5 Neutral 54.3 -16.8 AVG 0.541 37.5 Line 1 56.0 -18.5 QP 0.185 35.4 Line 1 54.3 -18.9 AVG 0.635 35.7 Line 1 56.0 -20.3 QP 0.541 21.1 Line 1 46.0 -24.9 AVG 0.635 20.8 Line 1 46.0 -25.2 AVG 0.213 24.5 Neutral 53.1 -28.6 AVG 27.809 20.4 Neutral 50.0 -29.6 AVG 27.840 18.7 Line 1 50.0 -31.3 AVG 27.809 28.4 Neutral 60.0 -31.6 QP 27.840 26.9 Line 1 60.0 -33.1 QP 9 AN1854.0 June 14, 2013 Application Note 1854 Temperature Mapping The following pictures show the temperature of ISL1903 evaluation board. Operating conditions: VIN = 120V, TA = +25C, VOUT = 42V, IOUT = 350mA FIGURE 25. TOP SIDE TEMPERATURE SNAPSHOT DURING 100% CONDUCTION AND FULL LOADING 10 FIGURE 26. BOTTOM SIDE TEMPERATURE SNAPSHOT DURING 100% CONDUCTION AND FULL LOADING AN1854.0 June 14, 2013 Application Schematic 42V, 350mA LED + LED Driver with Triac Dimming R25 LINE 10K 0805 R53 F1 250V, 2.5A L2 10mH 11 R1e 0O 2512 ~ C9 305V 680nF, 20% L3 10mH R1a 680O 2512 ~ R27 10K 0805 C3 C19 LED Load 220uH 2.3:1 (Pri:Aux) 50V 270uF, 20% Aux C1 50V 1uF, 10% 10O 0805 Q2 400V 47nF, 10% _ 2SK3471 Vdrain 600V, 1A MB6S BAV70 70V, 0.2A D2 NEUTRAL D4 R11 510K 0805 + 250V 330nF, 10% RV1 275V, 23J V275LA4P D1 200V, 3A STTH2R02A-T 100O axial R8 C1a C7 630V 4700pF, 5% 120V AC, 60Hz R9 510K 0805 D1a R29 R10 R12 R5 499O 0603 MCL4448 0.22O 1206 1.58K 0603 50V 10pF, 10% C18 acp R1c DNP OUT 16 1 VDD ISL1903DEMO1Z Rev A R1d 510K 0603 6 OC OVP 11 7 FB RAMP 10 16V 100nF, 10% C13 C4 16V 100nF, 10% 100O 0805 25V 25V 33uF, 20% 33uF, 20% GND 13 5 CS+ 4.99K 0603 C12 DHC 14 4 IOUT R19 100K 0603 R52 3 VREF C6 Vdrain R14 NC NC 2 OFFREF PWMOUT 15 R1b 21.5K 0603 acp AC 12 8 DELADJ 300K 1206 VERR 9 ISL1903 R20 R16 21.5K 0603 R13 43K 0603 C17 R15 R3 C5 C2 50V 1000pF, 5% 16V 0.47uF, 10% 50V 100pF, 5% 1.58K 0603 3K 0603 Application Note 1854 10O 0805 R30 D12 LED Q1 21.5K 0603 13V Zener T1 400V, 5.4A TK8P25DA or STD7NK40ZT4 AN1854.0 June 14, 2013 Application Note 1854 Bill of Materials TABLE 7. BOM FOR ISL1903DEMO1Z REV. A QTY REFERENCE DESIGNATOR TYPE/MOUNT/PACKAGE/VOL/TOL/MAT Cap, Radial, 47n, 400V, 10%, FILM MANUFACTURER C1 1 C1a Cap, TH, 330n, 250V, 20%, MKT EPCOS B32529C3334K000 1 C9 Cap, Radial, 0.033, 305V, 20%, MKT EPCOS B32921C3333M 1 C2 Cap, SM, 0603, 470n, 16V, 10%, X7R TDK C1608X7R1C474K 2 C4, C6 Cap, SM, 0603, 0.1, 16V, 10%, X7R MURATA GRM39X7R104K016AD 1 C5 Cap, SM, 0603, 1000p, 50V, 5%, C0G MURATA GRM1885C1H102JA01D 1 C17 Cap, SM, 0603, 100p, 50V, 5%, C0G PANASONIC ECJ-1VC1H101J 1 C18 Cap, SM, 0603, 10p, 50V, 5%, C0G YAGEO CC0603JRNP09BN100 2 C12, C13 Cap, SM, 1206, 33, 25V, 20%, X5R TDK C3216X5R1E336M 1 C7 Cap, RADIAL, 10X4mm, 4700p, 630V, 5%, FILM KEMET R76PD1470SE40J 1 C3 Cap, RADIAL, 10x20, 270, 50V, 20%, ALUM PANASONIC EEU-FM1H271 1 C19 Cap, SM, 0805, 1, 50V, 10%, X7R Murata GRM21BR71H105KA12L 1 D1a Diode, SM, SOT23, 150mA, 75V, Switching MICRO COM BAV70-TP 1 D1 Diode, SMD, $P 4.2X4.9, 600V, 0.5A, Rectifier MICRO COM MB6S-TP 1 D2 Diode, SMD, SOD-123, 13V, 500mW, zener FAIRCHILD MMSZ5243B 1 D12 Diode, SMD, MICROMELF, 100V, 200mA, Small signal VISHAY MCL4448-TR 1 D4 Diode, SM, SMA, 200V, 2A, Fast Recovery STM STTH2R02A 1 T1 Coupled Inductor, SM,220H Renco RLIN1000 2 L2, L3 Inductor, Radial, 10mH Renco RL-5480-3-10000 1 F1 Fuse, Radial, 250V, 2.5A Bel Fuse RST 2.5 1 U1 IC, ISL1903 16Pin, QSOP INTERSIL ISL1903FAZ 1 Q1 MOSFET, SM, DPAK, 250V, 7.5A Toshiba/STM TK8P25DA/STD7NK40ZT4 2 Q2 MOSFET, SM, SOT89, 500V, 0.5A Toshiba 2SK3471 1 R1a Res, SM, 2512, 680, 1%, Thick Film VISHAY CRCW2512680RFKEG 1 R1b Res, SM, 1206, 300k, 1%, Thick Film YAGEO RC1206FR-07300KL 1 R1c Res, SM, 0603, 0, 1%, Thick Film DNP DNP 2 R1d, R15 Res, SM, 0603, 100k, 1%, Thick Film VENKEL CR0603-10W-1003FT 1 R3 Res, SM, 0603, 3k, 1%, Thick Film YAGEO RC0603FR-073KL 1 R5 Res, SM, 1206, 0.22, 1%, Thick Film PANASONIC ERJ-8RQFR22V 1 R8, R53 Res, SM, 1206, 510k, 1%, Thick Film VENKEL CR1206-4W-5103FT 1 R9 Res, SM, 1206, 200, 1%, Thick Film Res, TH, 200, 1% - substitution for SM YAGEO MFR-25FBF-100R 2 R10, R11 Res, SM, 0805, 10, 1%, Thick Film VENKEL CR0805-8W-10R0FT 1 R12 Res, SM, 0603, 1.58k, 1%, Thick Film VENKEL CR0603-10W-1581FT 1 R13 Res, SM, 0603, 43k, 1%, Thick Film VENKEL C0603-10W-4302FT 1 R14 Res, SM, 0603, 1.2Meg, 1%, Thick Film PANASONIC ERJ-3EKF1204V 2 R16, R29 Res, SM, 0603, 21.5k, 1%, Thick Film VENKEL CR0603-10W-2152FT 1 R1e Res, SM, 2512, 0, 1%, Thick Film VENKEL CR2512-1W-000T 1 R19 Res, SM, 0603, 510k, 1% ,Thick Film PANASONIC ERJ-3EKF5103V 1 R20 Res, SM, 0603, 4.99k, 1%, Thick Film PANASONIC ERJ-3EKF4991V 2 R25, R27 Res, SM, 1206, 10k, 1%, Thick Film VENKEL CR1206-4W-1002FT 1 R30 Res, SM, 0603, 499, 1%, Thick Film VENKEL CR0603-10W-4990FT 1 R52 Res, SM, 0603, 100, 1%, Thick Film VENKEL CR0603-10W-1000FT 1 RV1 Varistor, Radial, 7mm, 275V, 23J, 1.2kA, TVS LITTLEFUSE V275LA4P 12 PANASONIC MANUFACTURER PART # 1 ECQE4473KF AN1854.0 June 14, 2013 Application Note 1854 Assembly Drawing FIGURE 27. SILKSCREEN TOP FIGURE 28. SILKSCREEN BOTTOM Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that the Application Note or Technical Brief is current before proceeding. For information regarding Intersil Corporation and its products, see www.intersil.com 13 AN1854.0 June 14, 2013 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Intersil: ISL1903DEMO1Z