DEMO MANUAL DC1744A LT3799 Offline Isolated Flyback LED Driver with PFC Description Demonstration circuit 1744A is an off-line isolated flyback converter featuring the LT®3799. The demo board is designed to drive a single LED from an input voltage range of 90V AC to 270V AC. It is also designed to comply with IEC 61000-3-2 Class C harmonics standard and EN55015B conducted EMI standard. The LT3799 controls an isolated flyback converter in boundary mode, suitable for LED applications requiring 4W to over 100W of LED power. Its novel current sensing scheme delivers a well-regulated output current to the secondary side without using an opto-coupler. Its unique bleeder circuit makes the LED driver compatible with PERFORMANCE SUMMARY TRIAC dimmers without additional components. Openand shorted-LED protection ensures long-term reliability. The LT3799 is available in a low profile, thermally-enhanced 16-lead MSOP package. The LT3799 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 1744A. Design files for this circuit board are available at http://www.linear.com/demo. 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 VALUE (TYPICAL) Input Range Line Frequency, 50Hz/60Hz 90V AC to 270V AC Output Current IOUT VIN = 120V AC, VLED = 3.6V 1.07A Maximum Output Voltage 5V Minimum Output Voltage 3V dc1744afa 1 DEMO MANUAL DC1744A quick start procedure IMPORTANT NOTE TO CUSTOMERS: HIGH VOLTAGES ARE PRESENTED 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-THREATHENING INJURIES. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERS FOR PROPER COMPONENT REPLACEMENT. Demonstration circuit 1744A is easy to set up to evaluate the performance of the LT3799. Refer to Figure 1 for proper measurement equipment setup and follow the procedure below: 1.Connect a 1A LED between LED+ and LED– 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 (270V AC). 4.Check for the proper output current. Once the proper output currents are established, adjust the input voltage and/or the load and observe the output current regulation, efficiency, power factor and other parameters. ~ A AC POWER SUPPLY 90V AC TO 270V AC ~ + ~ A – V + V – Figure 1. Proper Measurement Equipment Setup dc1744afa 2 DEMO MANUAL DC1744A quick start procedure 1.2 1.0 ILED (A) 0.8 0.6 0.4 0.2 0 0 30 60 90 120 TRIAC ANGLE (DEG) 150 180 DC1744 F02 Figure 2. LED Current vs TRIAC Angle (120V AC Application) 0.99 POWER FACTOR 0.97 0.95 0.93 0.91 0.89 0.87 0.85 90 110 130 150 170 190 210 230 250 270 VIN (VAC – RMS) DC1744A F03 Figure 3. Power Factor vs Input Voltage dc1744afa 3 DEMO MANUAL DC1744A 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 C1 CAP, 33nF 20% 310V AC MKP VISHAY BFC233920333 3 1 C2 CAP, 1812 22nF 5% 630V C0G TDK C4532C0G2J223J 4 1 C3 CAP, 1210 10µF 20% 50V X7S TAIYO YUDEN UMK325C7106MM-T 5 1 C4 CAP, 68nF 10% 450V RADIAL RUBYCON 450MMK683K 6 1 C6 CAP, 0603 0.1µF 10% 16V X7R MURATA GRM188R71C104KA01D 7 1 C7 CAP, 0603 68nF 10% 50V X7R AVX 06035C682KAT2A 8 1 C8 CAP, 0805 4.7µF 10% 25V X5R TDK C2012X5R1E475K 9 1 C13 CAP, 0805 2.2nF 10% 250V U2J MURATA GRM21A7U2E222JW31D 10 1 C20 CAP, 2.2nF 10% 550VAC TYPE “Y1” VISHAY 440LD22-R 11 1 C21 CAP, 0603 4.7pF ±0.25pF 50V NP0 AVX 06035A4R7CAT2A 12 1 C22 CAP, 1500µF 20% 6.3V ELEC SANYO 6SEPC1500M+T 13 1 D1 DIODE, ULTRA FAST RECOVERY RECTIFIER CENTRAL SEMI CMMR1U-06 TR 14 2 D2, D8 DIODE, FAST SWITCHING DIODES/ZETEX BAV20W-7-F 15 1 D7 DIODE, SCHOTTKY BARRIER RECTIFIER CENTRAL SEMI CMSH2-40L TR13 16 1 D9 DIODE, ZENER 33V DIODES INC SMAZ33-13-F 17 3 L1, L2, L3 IND, 3.3mH, SMD COILCRAFT LPS6235-335ML 18 1 Q1 XSTR, MOSFET, N-CHANNEL 600V INFINEON SPU04N60C3 19 2 R1, R5 RES, 1206 100k 5% 1/4W VISHAY CRCW1206100KJNEA 20 1 R2 RES, 0805 200k 5% 1/8W VISHAY CRCW0805200KJNEA 21 2 R3, R18 RES, 0603 100k 1% 1/10W VISHAY CRCW0603100KFKEA 22 1 R4 RES, 0603 4.99k 1% 1/10W VISHAY CRCW06034K99FKEA 23 1 R8 RES, 1206 300mΩ 1% 1/4W VISHAY RCWE1206R300FKEA 24 1 R9 RES, 0603 20Ω 5% 1/10W VISHAY CRCW060320R0JNEA 25 1 R10 RES, 1210 100Ω 5% 1/4W VISHAY CRCW1210100R0JNEA 26 2 R11, R16 RES, 1206 499k 1% 1/4W VISHAY CRCW1206499KFKEA 27 1 R12 RES, 0603 3.48k 1% 1/10W VISHAY CRCW06033K48FKEA 28 2 R17, R24 RES, 0805 10k 5% 1/8W VISHAY CRCW080510K0JNEA 29 1 R19 RES, 0603 40.2k 1% 1/10W NIC NRC06F4022TRF 30 1 R20 RES, 0603 24.9k 1% 1/10W VISHAY CRCW060324K9FKEA 31 1 R30 RES, 1210 750Ω 5% 1/2W VISHAY CRCW1210750RJNEA 32 1 R32 RES, 0603 10k 5% 1/10W NIC NRC06J103TRF 33 1 T1 XFMR, FLYBACK (T201) WURTH ELEKTRONIK 750813002 34 1 U1 IC, TRIAC DIMMABLE OFFLINE LED DRIVER LINEAR TECH. LT3799EMSE 2 E4, E5 TURRET MILL-MAX 2308-2-00-80-00-00-07-0 Hardware dc1744afa 4 DEMO MANUAL DC1744A Schematic Diagram dc1744afa 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. 5 DEMO MANUAL DC1744A 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 dc1744afa 6 Linear Technology Corporation LT 0611 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 2011