DEMO MANUAL DC1901A LTC3639EMSE High Efficiency 150V, 100mA Synchronous Buck Converter DESCRIPTION Demonstration circuit 1901A is a 150V input, 100mA output DC/DC power supply featuring the LTC3639. The IC operates in a high efficiency Burst Mode® operation and includes internal high and low side power MOSFETs. The board will accept an input voltage between 4V and 150V, and provide jumper selected output voltages of 1.8V, 3.3V, 5V and an option for additional voltages. The IC includes internal soft-start and a provision for increasing soft-start time. is included to allow multiple boards to be paralleled for higher output current. Included on the board is an ON/OFF jumper that can also be configured as a precision undervoltage lockout. Additional PC pads are included for programming current limit to optimize efficiency and for reducing output voltage ripple and reducing component size. A terminal (FBO) Design files for this circuit board are available at http://www.linear.com/demo PERFORMANCE SUMMARY PARAMETER Output voltage between 800mV and VIN can be programmed using optional resistors. (Higher voltage rating output capacitors may be required.) The LTC3639 data sheet gives a complete description of the IC operation and application information. The data sheet must be read in conjunction with this quick start guide. L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Specifications are at TA = 25°C CONDITION Input Voltage Range VALUE 4V to 150V 1.8V Output Voltage VIN = 12V, IOUT = 0A to 100mA 1.8V ±2% 3.3V Output Voltage VIN = 12V, IOUT = 0A to 100mA 3.3V ±2% 5V Output Voltage VIN = 12V, IOUT = 0A to 100mA 5V ±2% Maximum Output Current, IOUT VIN = 4V to 150V, VOUT = 1.8V, 3.3V or 5V 100mA Typical Efficiency VIN = 12V, VOUT = 5V, IOUT = 100mA 87.3% Typical Output Ripple VIN = 150V, VOUT = 5V, IOUT = 100mA (20MHz BW) 66mVP-P dc1901af 1 DEMO MANUAL DC1901A QUICK START PROCEDURE Demonstration circuit 1901A is easy to set up to evaluate the performance of the LTC3639. Refer to Figure 1 for the proper measurement equipment setup and follow the procedure below: 7. With power off, move jumpers JP1 and JP2 to the other fixed voltage settings (1.8V or 3.3V). Repeat steps 5 and 6. Check for the proper output voltage and other parameters. 1. With power off, connect the input power supply (set for 0V) to VIN and GND (input return). 3. Connect the 5V output load between VOUT and GND (Initial load: no load). NOTE: When measuring the output or input voltage ripple, do not use the long ground lead on the oscilloscope probe. See Figure 2 for the proper scope probe technique. Short, stiff leads need to be soldered to the (+) and (–) terminals of an output capacitor. The probe’s ground ring needs to touch the (–) lead and the probe tip needs to touch the (+) lead. 4. Connect the DVMs to the input and outputs. ADDITIONAL NOTES: 5. Turn on the input power supply and slowly increase to 12V. Check for the proper output voltages. (5V output should be within 5V ±2%.) CAUTION: 2. Select 5V output using jumper JP1 (B position) and JP2 (A position). Select ON position for JP3. 6. Once the proper output voltages are established, adjust the loads within the operating range and observe the output voltage regulation, ripple voltage and other parameters. Be careful when testing with high voltage. High voltage can result in an electric shock if care is not taken. For 5V output, VIN input voltage should be at least 5V or higher. Figure 1. Proper Measurement Equipment Setup dc1901af 2 DEMO MANUAL DC1901A QUICK START PROCEDURE + VOUT – COUT GND Figure 2. Measuring Output Voltage Ripple LTC3639 3.3VOUT LTC3639 1.8VOUT 90 85 85 85 80 80 80 75 75 75 70 65 60 70 65 60 55 55 50 50 12VIN, 5VOUT 36VIN, 5VOUT 120VIN, 5VOUT 45 40 0 10 20 30 40 50 60 70 80 90 100 LOAD CURRENT (A) dc1901 F03a EFFICIENCY (%) 90 EFFICIENCY (%) EFFICIENCY (%) LTC3639 5VOUT 90 65 60 55 12VIN, 3.3VOUT 36VIN, 3.3VOUT 120VIN, 3.3VOUT 45 40 70 0 10 20 30 40 50 60 70 80 90 100 LOAD CURRENT (A) dc1901 F03b 50 12VIN, 1.8VOUT 36VIN, 1.8VOUT 120VIN, 1.8VOUT 45 40 0 10 20 30 40 50 60 70 80 90 100 LOAD CURRENT (A) dc1901 F03c Figure 3. Efficiency vs Load Current dc1901af 3 DEMO MANUAL DC1901A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 1 C1 ALUM. ELECT 22μF 200V MVE Series 12.5x16mm NIPPON CHEMI-CON, EMVE201ARA220MKG5S 2 1 C2 CAP., X7R, 1μF, 200V, 10% 2220 KEMET, C2220X105K2RAC7533 3 1 C4 CAP., X7R, 47nF, 25V, 10% 0603 0.047μF AVX, 06033C473KAT2A 4 1 C6 CAP., X7R, 100μF, 10V, 20% 1210 TAIYO YUDEN, LMK325ABJ107MM-T 5 1 C9 CAP., X7R, 0.1μF, 25V, 10% 0603 AVX, 06033C104KAT2A 6 1 L1 INDUCTOR, 220μH SUMIDA, CDRH105RNP-221NC 7 1 R1 RES., CHIP, 2M, 1/10W, 5% 0603 VISHAY, CRCW06032M00JNEA 8 2 R3, R6 RES., CHIP, 0Ω, 1/10W, 0603 VISHAY, CRCW06030000Z0EA 9 1 U1 IC., LTC3639EMSE MSE16(12), 4X3MM LINEAR TECH., LTC3639EMSE#PBF Additional Demo Board Circuit Components 10 0 C3 CAP., 0603 OPT 11 0 C8 CAP., 1210 OPT 12 0 R2, R4, R7, R8 RES., 0603 OPT TESTPOINT, TURRET, 0.094" MILL-MAX, 2501-2-00-80-00-00-07-0 Hardware: For Demo Board Only 13 5 E1, E2, E3, E4, E5 14 3 JP1, JP2, JP3 HEADER, 3 PIN 0.079" SINGLE ROW SULLINS, NRPN031PAEN-RC 15 3 XJP1, XJP2, XJP3 SHUNT, 0.079" CENTER SAMTEC, 2SN-BK-G dc1901af 4 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 D E5 E4 E1 + C1 22uF 200V R3 0 R2 OPT R1 2M VIN OPT R8 OFF ON 5 2. FOR 5V OUTPUT, VIN RANGE IS 6V-150V. 1. ALL RESISTORS ARE 0603. ALL CAPACITORS ARE 0603. C3 OPT 11 5 12 14 3 ISET FBO OVLO RUN VIN CUSTOMER NOTICE R4 OPT 2 C2 1uF 200V 2220 U1 LTC3639EMSE VFB SW SS VPRG2 VPRG1 3 4 3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 2 B A 2 B A C4 47nF 3 3 LE T. * * JP2 JP1 ECO SCALE = NONE JP1 A EXT. R A A B B JP2 C6 100uF 10V 1210 DATE VOUT GND 100mA 1.8V/3.3V/5V 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only E3 C9 0.1uF E2 CHARLIE Z. 11-16-12 APPROVED 1 DATE: N/A SIZE LTC3639EMSE DEMO CIRCUIT 1901A 2 Friday, November 16, 2012 IC NO. 1 SHEET 1 OF 1 1 REV. HIGH EFFICIENCY, 150V, 100mA SYNCHRONOUS STEP-DOWN CONVERTER TECHNOLOGY B A 3.3V 5.0V B 1.8V VOUT * R7 OPT R6 0 PRODUCTION C8 OPT 1210 DESCRIPTION 1 REVISION HISTORY REV 2 CHARLIE Z. TITLE: SCHEMATIC 1 1 220uH CDRH105R L1 APPROVALS 10 6 7 9 1 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. 3 1 JP3 NOTE: UNLESS OTHERWISE SPECIFIED FBO GND VIN 4V - 150V VIN 4 NC NC NC NC 2 4 13 15 GND GND 8 16 GND 17 5 A B C D DEMO MANUAL DC1901A SCHEMATIC DIAGRAM dc1901af 5 DEMO MANUAL DC1901A 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 dc1901af 6 Linear Technology Corporation LT 0413 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2013