DEMO MANUAL DC1817B LT3798 Isolated No Opto-Coupler Flyback Controller with PFC Description Demonstration circuit 1817B is an off-line isolated flyback converter featuring the LT®3798. The demo board provides a single constant-voltage output of 24V at 2A. It is optimized to operate over a wide AC input voltage range (90VAC to 265VAC, 47Hz to 63Hz). Output voltage accuracy stays within ±5% over the whole input voltage and load range. It provides a high power factor (>0.95) enabling the design to be used worldwide. It is also designed to comply with the IEC 61000-3-2 Class D harmonics standard and the EN55015B conducted EMI standard. The LT3798 controls an isolated flyback converter in boundary mode, suitable for applications with voltage or current regulation. Its novel sensing scheme delivers a Performance Summary well regulated output voltage or current to the secondary side without the use of an opto-coupler. The LT3798 is available in a low profile, thermally enhanced 16-lead MSOP package. The LT3798 data sheet gives a complete description of the part, operation and application information. The data sheet must be read in conjunction with this quick start guide for demo circuit 1817B. Design files for this circuit board are available at http://www.linear.com/demo/DC1817B L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. (TA = 25°C) PARAMETER CONDITIONS Input Range Line Frequency, 47Hz to 63Hz MIN TYP MAX 90VAC 120VAC 265VAC Output Voltage 24V Efficiency 90VAC to 265VAC, 2A IOUT Power Factor 24V/2A Output, 90VAC to 265VAC 87% 0.99 0.98 0.95 dc1817bfa 1 DEMO MANUAL DC1817B Quick Start Procedure IMPORTANT NOTE TO CUSTOMERS: HIGH VOLTAGES ARE PRESENT ON THE DEMO CIRCUIT, AND CAN LEAD TO LETHAL INJURIES TO HUMAN BODY. ONLY QUALIFIED PERSONNEL SHOULD OPERATE IT. IT IS STRONGLY RECOMMENDED TO USE SAFETY GLASSES AND AN ISOLATION TRANSFORMER. NOTE: Improper components replacement on the demo circuit can cause performance deteriorations, circuit malfunction, property damage, and even life threatening injuries. Contact Linear Technology applications engineers for proper component replacement. Demonstration circuit 1817B is easy to set up to evaluate the performance of the LT3798. Refer to Figure 1 for proper measurement equipment setup and follow this procedure: 1.Connect an adjustable load between + and – output terminals. 2.With power off, connect the input power supply to Line (L) input and Neutral (N) input. 3.Turn on the power at the input. NOTE. Make sure that the input voltage does not exceed the maximum input voltage (265VAC). 4.Check for the proper output voltage. Once the proper output voltage is established, adjust the input voltage and/or the load and observe the output voltage regulation, efficiency, power factor and other parameters. Figure 1. Proper Measurement Equipment Setup 2 dc1817bfa DEMO MANUAL DC1817B 25 95 24 90 23 VOUT (V) 100 85 80 22 21 2A LOAD 1A LOAD 75 90 110 130 150 170 190 210 VIN (AC-RMS) 230 250 20 270 120VIN 240VIN 0.25 0 0.5 dc1817b F02 Figure 2. Efficiency vs Input Voltage 0.75 1 1.25 LOAD (A) 1.5 1.75 2 dc1817b F03 Figure 3. VOUT vs Load Current 1 0.98 POWER FACTOR EFFICIENCY (%) quick start procedure 0.96 0.94 0.92 0.90 2A LOAD 90 110 130 150 170 190 210 VIN (AC-RMS) 230 250 270 dc1817b F04 Figure 4. Power Factor vs Input Voltage Input Line Voltage and Current IIN(AC) (1A/DIV) VIN(AC) (200V/DIV) 5ms/DIV 5ms/DIV Figure 5. 120VAC (PF = 0.99) Figure 6. 230VAC (PF = 0.97) dc1817bfa 3 DEMO MANUAL DC1817B quick start procedure Switch Node Voltage VSW (100V/DIV) 2µs/DIV 2µs/DIV Figure 7. 120VAC (VSW = 450V) Figure 8. 230VAC (VSW = 630V) Output Current and Switch Node Voltage During Output Short IC(VIN) (20V/DIV) IOUT (5A/DIV) VSW (200V/DIV) 200ms/DIV 200ms/DIV Figure 9. 120VAC Figure 10. 230VAC VOUT (1V/DIV) 2ms/DIV Figure 11. Output Ripple at 120VAC, 2A Load 4 2ms/DIV Figure 12. Output Ripple at 230VAC, 2A Load dc1817bfa DEMO MANUAL DC1817B Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 1 B1 RECTIFIER, BRIDGE 600V 0.8A DIODES INC. HD06-T 2 1 CAC1 CAP, 0.1µF 20% 250V/275VAC ECQ-UL PANASONIC, ECQUAAF104M 3 1 C2 CAP, FILM, 0.22µF 20% 400V PANASONIC ECQE4224KF 4 1 C3 CAP, 10µF 20% 50V ALUM RUBYCON 50YXJ10M 5X11 5 1 C6 CAP, 0805 0.1µF 10% 50V X7R TDK, C2012X7R1H104K 6 1 C7 CAP, 0805 2.2µF 10% 50V X5R TDK, C2012X5R1H225K 7 1 C8 CAP, 0805 4.7µF 20% 16V X5R AVX 0805YD475MAT2A 8 2 C10, C11 CAP, 1000µF 20% 35V ELEC NIPPON CHEMI-CON ELXV350ETD102MK30S 9 1 C13 CAP, 1210 2.2nF, 5% 630V U2J MURATA, GRM32A7U2J222JW31D 10 1 C20 CAP, 2.2nF 20% 400V, Y5U TYPE "Y1" VISHAY, 440LD22-R 11 2 C12, C21 CAP, 0805 22pF ±0.25pF 50V NP0 AVX, 08055A220CAT2A 12 2 C23, C25 CAP, 1210 10µF 20% 35V X5R MURATA, GRM32ER7YA106KA12L 13 1 C24 CAP, 1206 47pF 10% 630V NPO AVX, 1206CA470KAT1A 14 1 D1 DIODE, ULTRA FAST RECTIFIER CENTRAL SEMI, CMR1U-10M 15 1 D2 DIODE, FAST SWITCHING DIODES INC, BAV20W-7-F 16 1 D5 DIODE, SUPER BARRIER RECIFIER 20A DIODES INC SBR20A200CTB 17 1 D8 DIODE, SWITCH 100V 400MW SOD123 DIODES INC, 1N4148W-7-F 18 1 F1 FUSE, 2.5A, FAST ACTING COOPER BUSSMAN, SS-5F-3.15A 19 1 L2 CHOKE, D CODE DOUBLE CHOKE TDK/EPCOS, B82731H2701A030 20 1 L1 INDUCTOR, 1mH, 0.78A RADIAL 1000µH TDK, TSL1315RA-102JR78-PF 21 1 Q1 MOSFET, N-CH 650V 21A D2PAK INFINEON, IPB60R165CP 22 2 R1, R2 RES, 1206 100k 1% 1/4W VISHAY CRCW1206100KFKEA 23 1 R3 RES, 0805 100k 1% 1/8W VISHAY, CRCW0805100KFKEA 24 1 R4 RES, 0805 5.49k 1% 1/8W VISHAY, CRCW08055K49FKEA 25 1 R5 RES, 0805 68Ω 5% 1/8W VISHAY, CRCW080568R0JKEA 26 1 R25 RES, 0805 20Ω 1% 1/8W VISHAY, CRCW080520R0FKEA 27 1 R7 RES, 0805 33k 5% 1/8W VISHAY, CRCW080533K0JNEA 28 1 R8 RES, 0.03Ω 1/4W 1% 1206 SMD VISHAY, WSL1206R0300FEA 29 1 R9 RES, 1210 510Ω 5% 1/2W VISHAY, CRCW1210510RJNEA 30 2 R10, R11 RES, 1206 499k 1% 1/4W VISHAY CRCW1206499KFKEA 31 1 R18 RES, 0805 10k 1% 1/8W VISHAY, CRCW080510K0FKEA 32 1 R19 RES, 0805 40.2k 1% 1/8W VISHAY, CRCW080540K2FKEA 33 1 R20 RES, 0805 31.6k 1% 1/8W VISHAY, CRCW080531K6FKEA 34 1 R37 RES, 0805 0Ω 5% 1/8W VISHAY, CRCW08050000Z0EA 35 2 R27, R28 RES, 1206 510Ω 5% 1/4W VISHAY CRCW1206510KJKEA 36 1 R32 RES, 1210 51k 5% 1/2W VISHAY, CRCW121051KOJNEA 37 1 R35 RES, 0805 2.4M 5% 1/8W VISHAY, CRCW08052M40JNEA 38 1 R36 RES, 0805 301k 1% 1/8W VISHAY, CRCW0805301KFKEA 39 1 R38 RES, 0805 24.9k 1% 1/8W VISHAY, CRCW080524K9FKEA dc1817bfa 5 DEMO MANUAL DC1817B parts list ITEM QTY 40 1 REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER T1 XFMR, FLYBACK WÜRTH ELECTONIK, 750811248 41 1 U1 IC, ISOLATED FLYBACK CONTROLLER LINEAR TECHNOLOGY LT3798EMSE#PBF 42 1 V1 VARISTOR, 320V RMS 13.5MM RADIAL VISHAY VDRS10P320BSE RES, 0805, OPTION OPTION Additional Circuit Components 1 0 R23 Hardware/Components (For Demo Board Only) 1 2 J1, J2 TERMINAL BLOCK, 2 POSITION WEIDMULLER, 1715250000 2 4 MH1 TO MH4 STAND-OFF, NYLON, 0.25" KEYSTONE, 8831 (SNAP-ON) 6 dc1817bfa Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. A B C V1 1 L 4 3 2 275VAC CAC1 0.1uF 1 2 L2 27mH B82731H2701A030 VDRS10P320BSE N 2 90 - 265VAC 5 B1 HD06 L1 1mH 1 F1 250V, 2.5A C2 0.22uF 400V FILM R38 24.9k R18 10k 1% OPT R23 INTVCC R11 499k 1% 1206 R10 499k 1% R20 31.6k R19 40.2k 1% 4 R35 2.4M 1% 301k 1% 1N4148 D8 R36 R2 100k 1% 1206 R1 100k 1% 1206 15 14 9 COMP+ COMPC6 0.1uF 50V C8 4.7uF 16V 0805 INTVCC 20 1% R25 R4 5.49K 1% R3 100k 1% 3 LT3798EMSE U1 7 8 INTVCC 13 SENSE GATE FB R7 33K 22pF C21 68 R5 3 C12 22pF R32 51K 1210 CMR1U-10M D1 C13 2.2nF 1210 Figure 13. DC1817B Demo Circuit Schematic C7 2.2uF R37 0 5 OVP 1 CTRL1 2 CTRL2 3 CTRL3 4 VREF 12 EN_UVLO 16 VINSENSE 10uF 50V C3 BAV20W D2 6 4 + VIN 11 VC 2 4 1 3 10 DCM GND 17 J1 - D + 5 T1 750811248 2 11 10 8 9 Y1 C20 2200pF Q1 IPB60R165CP 5 6 4 2 3 R8 0.03 1206 C24 47pF 630V 1206 R9 510 1210 1 2 C23 C25 10uF 35V 1210 D5 SBR20A200CTB + C10 1000uF 35V + 1 C11 1000uF 35V 1 R28 510 1210 R27 510 1210 J2 24V / 2A 2 1 - + A B C D DEMO MANUAL DC1817B Schematic Diagram dc1817bfa 7 DEMO MANUAL DC1817B DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations. If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive. Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer. Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 2004, Linear Technology Corporation 8 dc1817bfa Linear Technology Corporation LT 1114 REV A • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2012