DEMO MANUAL DC1595A LT3799 Offline Isolated Flyback Led Controller with PFC DESCRIPTION

Transcription

1 LT799 Offline Isolated Flyback Led Controller with PFC DESCRIPTION Demonstration circuit 595A is an off-line isolated flyback converter featuring LT799. The demo board is designed to drive a 0V nominal LED string at A from an input voltage range of 90VAC to 70VAC. It is also designed to comply with IEC Class C harmonics standard and EN5505B conducted EMI standard. The LT799 controls an isolated flyback converter in boundary mode, suitable for LED applications requiring W to over 00W 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 TRIAC dimmers without additional components. Openand shorted-led protection ensures long term reliability. The LT799 is available in a low profile, thermally enhanced 6-lead MSOP package. The LT799 datasheet gives a complete description of the part, operation and application information. The datasheet must be read in conjunction with this quick start guide for demo circuit 595A. Design files for this circuit board are available at 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. PERFORMANCE SUMMARY (T A = 5 C) PARAMETER CONDITIONS VALUE Input Range Line Frequency, 50Hz/60Hz 90VAC to 70VAC Output Current I OUT V IN = 0VAC A Maximum Output Voltage 5V Minimum Output Voltage 6V

2 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 PERSONEL 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 DETERIORA- TIONS, CIRCUIT MALFUNCTION, PROPERTY DAMAGE, AND EVEN LIFE-THREATHENING INJURIES. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERS FOR PROPER COMPONENT REPLACEMENT. Demonstration circuit 595A is easy to set up to evaluate the performance of the LT799. Refer to Figure for proper measurement equipment setup and complete the following procedure:. Connect a A LED string between LED + and LED terminals.. With power off, connect the input power supply to Line (L) Input and Neutral (N) Input.. Turn on the power at the input. NOTE. Make sure that the input voltage does not exceed the maximum input voltage (70VAC).. 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. Figure. Proper Measurement Equipment Setup

3 QUICK START PROCEDURE EFFICIENCY (%) V IN (AC-RMS) Figure. Efficiency vs V IN..0 I LED (A) V APPLICATION 0V APPLICATION TRIAC ANGLE (DEGREES) Figure. LED Current vs TRIAC Angle POWER FACTOR ( ) V IN (V AC ) Figure. Power Factor vs Input Voltage

4 PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components B RECTIFIER, BRIDGE 600V 0.8A DIODES INC. HD06-T C CAP, 0.068μF 0% 05VAC MKP VISHAY BFC C CAP, 0.μF 0% 50V RUBYCON 50MMK0J C CAP, 0μF 0% 50V ALUM RUBYCON 50YXJ0M 5X 5 C CAP, 0.μF 0% 50V FILM RUBYCON 50MMK K 6 C6 CAP, μF 0% 50V X7R AVX 0605C5KATA 7 C7 CAP, μF 0% 50V X7R AVX 0605C0KATA 8 C8 CAP, μF 0% 6V X5R AVX 0805YD75MATA 9 C0, C CAP, 560μF 0% 5V ELEC RUBYCON 5ZLJ560M 0X0 0 C0 CAP,.nF 0% Y5B TYPE "Y" VISHAY 0LD-R C CAP, 060.7pF ±0.pF 50V NP0 AVX 0605AR7CATA D DIODE, FAST SWITCHING DIODES INC. USJ--F D, D8 DIODE, FAST SWITCHING DIODES INC. BAV0W-7-F D5 DIODE, 50V, A, SBR DIODES INC. SBRU50SA 5 F FUSE, A BUSSMAN SS-5H-A 6 L IND, mh WURTH ELECTRONIK L IND, 750μH WURTH ELECTRONIK Q XSTR, MOSFET, N-CHANNEL 650V FAIRCHILD SEMI FDPF5N65 9 R, R RES, 06 00kΩ /W VISHAY CRCW0600KFKEA 0 R, R8 RES, kΩ /0W VISHAY CRCW06000KFKEA R RES, kΩ /0W VISHAY CRCW060K99FKEA R5, R5 RES, 060 0Ω /0W VISHAY CRCW0600R0FKEA R7 RES, 060 kω /0W VISHAY CRCW060K00FKEA R8 RES, Ω /W VENKEL LCR06-R050GT 5 R9 RES, 06.0kΩ /W VISHAY CRCW06K0FKEA 6 R0, R RES, 06 99kΩ /W VISHAY CRCW0699KFKEA 7 R RES, 060.8kΩ /0W VISHAY CRCW060K8FKEA 8 R9 RES, kΩ /0W VISHAY CRCW0600KFKEA 9 R0 RES, kΩ /0W VISHAY CRCW0606K9FKEA 0 R RES, 060 0kΩ JUMPER VISHAY CRCW Z0EA R0 RES, 00Ω 5% W METAL OXIDE KOA MOSCT5R0J T XFMR, FLYBACK COILCRAFT JA9-AL U IC, TRAIC DMMABLE OFFLINE LED DRIVER LINEAR TECH. LT799EMSE V VARISTOR, 0V RMS.5MM RADIAL SEI CV0K0T 5 Z DIODE, TRANSIENT VOLTAGE SUPPRESSOR 70V DIODES INC. SMBJ70A 6 Z DIODE, ZENER, V DIODES INC.SMAZ--F Additional Demo Board Circuit Components 0 R RES, 060 OPTION OPTION Hardware E, E, E, E5 TURRET MILL MAX MILL-MAX

5 SCHEMATIC DIAGRAM 90-70VAC 50/60Hz F A V 0VAC FAULT R9 0.k R 00k R5 0 R OPT C7 0.uF REVISION HISTORY ECO REV DESCRIPTION APPROVED DATE PRODUCTION WEI G. 0/0/ R7 k C.7pF V R9.0k 0 6 R5 FDPF5N65 GATE 0 5 INTVCC U LT799EMSE CUSTOMER NOTICE LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. CONTRACT NO. APPROVALS PCB DES. ENG. TITLE: SIZE N/A DATE: SCHEMATIC TECHNOLOGY OFFLINE ISOLATED FLYBACK LED CONTROLLER WITH PFC LT799EMSE DEMO CIRCUIT 595A 60 McCarthy Blvd. Milpitas, CA 9505 Phone: (08)-900 Fax: (08)-0507 LTC Confidential-For Customer Use Only IC NO. REV SHEET OF DCM VINSENSE NC CTRL CTRL FB SENSE GND VREF CTRL FAULT INTVCC COMP+ CT VIN B HD06 C 0.068uF X CAP - + R0 00 R8 00k R 00k R 0 C 0uF 50V R 00k D5 SBRU50SA E LED+ C8.7uF 6V R8 50m C6 0.05uF 50V + L E N E L 750uH FAULT R 99k R.8k D8 BAV0W D BAV0W R.99k T : Z CMZ597B + C0 560uF 5V Z SMBJ70A D CMRU-06M Q C0 00pF Y 7 6 L mh C 0.uF + C 560uF 5V R0 99k R0 6.9k C 0.uF 00V E5 COMP- LED- 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

6 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 0 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 60 McCarthy Blvd. Milpitas, CA 9505 Copyright 00, Linear Technology Corporation 6 LT REV B PRINTED IN USA Linear Technology Corporation 60 McCarthy Blvd., Milpitas, CA (08) -900 FAX: (08) LINEAR TECHNOLOGY CORPORATION 0