DEMO MANUAL DC2001A LTC3787EUFD 4-Phase High Current Synchronous Step-Up Converter Description Demonstration circuit 2001A is a step-up DC/DC converter using two LTC3787EUFD dual-phase synchronous boost controllers in a parallel configuration for high current, high power 4-phase operation. The LTC3787 data sheet gives a complete description of the part, operation and application information, and must be read in conjunction with this demo manual for the DC2001A. The DC2001A has an input supply voltage range from 6V to 24V. The converter provides an output voltage of 24V, with a very high efficiency output of 25A to 30A, as shown in Figure 2. Design files for this circuit board are available at http://www.linear.com/demo Performance Summary L, LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Specifications are at TA = 25°C PARAMETER CONDITIONS Minimum Input Voltage IOUT = 0A to 25A UNITS 6V Maximum Input Voltage IOUT = 0A to 30A 24V Output Voltage VIN = 6V to 24V, MODE = FCC Default Operating Frequency FREQ = GND Efficiency VIN = 18V, VO = 24V, IO = 30A 24V ±2% 350kHz 98.2% dc2001af 1 DEMO MANUAL DC2001A Quick Start Procedure Demonstration circuit 2001A is easy to set up to evaluate the performance of the LTC3787. Refer to Figure 1 for proper measurement equipment setup and follow the procedure below. 4. Turn on the supply and adjust the voltage to the desired value, up to 24V, while monitoring the output. NOTE: Do not exceed 33V input. 5. Once the proper output voltage has been established, increase the current limit as necessary. 1. Set the jumper as follows: JP1: FCC JP2: ON 6. Turn on the load and adjust as necessary. Optional 2. With all power off, connect the input power supply, load, and meters using heavy duty cables, as shown in Figure 1. 1. For pulse skip or Burst Mode® operation, set jumper JP1 to PS or BM. 2. To shut down switching, set jumper JP2 to OFF. NOTE: Input supply must be capable of at least 65A at 12V, or 110A at 6V. 3. For power good indication, monitor PGOOD. 3. Preset the system load to 0A and the input supply to 12V, 2A current limit. 4. For external clock synchronization, connect the clock source to CLKIN and remove jumper JP1. – VOUT LOAD – VOUT A + + IOUT + – VIN A + IIN dc2001a F01 VIN SUPPLY – Figure 1. Proper Measurement Equipment Setup 2 dc2001af DEMO MANUAL DC2001A Quick Start Procedure 100 VIN = 18V 98 VIN = 12V VIN = 9V 96 VIN = 6V Efficiency (%) 94 92 90 88 86 84 82 80 0 5 10 15 20 25 Load Current (A) 30 35 dc2001a F02 Figure 2. Efficiency Curves, fSW = 350kHz, MODE = FCC dc2001af 3 DEMO MANUAL DC2001A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 32 CAP, X7R, 22µF, 20%, 25V, 1812 CIN1A-CIN4A, CIN1B-CIN4B, CIN7ACIN10A, CIN7B-CIN10B, COUT1A-COUT2A, COUT1B-COUT2B, COUT4A-COUT5A, COUT4B-COUT5B, COUT7A-COUT8A, COUT7B-COUT8B, COUT10A-COUT11A, COUT10B-COUT11B TDK, C4532X7R1E226M 2 8 CIN5-CIN6, CIN11-CIN12, COUT3, COUT6, COUT9, COUT12 CAP, 330µF, 20%, 35V, ELECT NIPPON CHEMI-CON, EMZA350ADA331MJA0G 3 8 C1, C10, C16-C17, C26, C31-C33 CAP, X7R, 0.01µF, 5%, 25V, 0603 AVX, 06033C103JAT2A 4 8 C2, C7-C8, C11, C19, C23-C24, C27 CAP, X7R, 0.1µF, 10%, 25V, 0603 TDK, C1608X7R1E104K 5 2 C4, C21 CAP, X7R, 1µF, 10%, 16V, 0603 TAIYO YUDEN, EMK107BJ105KA-T 6 5 C5, C13, C15, C22, C29 CAP, NPO, 10pF, 5%, 25V, 0603 AVX, 06033A100JAT2A 7 2 C9, C25 CAP, X5R, 4.7µF, 20%, 25V, 0805 TAIYO YUDEN, TMK212BJ475MG-T 8 2 C14, C30 CAP, NPO, 1000pF, 5%, 25V, 0603 AVX, 06033A102JAT2A 9 4 D1-D4 DIODE, SCHOTTKY, 30V, SOD123 INFINEON, BAS140W 10 4 L1-L4 IND, 1.0µH COILCRAFT, SER2010-102MLB 11 12 Q1A-Q8A, Q2B, Q4B, Q6B, Q8B XSTR, MOSFET N-CHANNEL INFINEON, BSC014N04LSI 12 1 R1 RES, 100k, 5%, 1/10W, 0603 VISHAY, CRCW0603100KJNEA 13 8 R5-R6, R17, R20, R31-R32, R39, R41 RES, 10Ω, 5%, 1/10W, 0603 VISHAY, CRCW060310R0JNEA 14 2 R11, R35 RES, 2.2Ω, 5%, 1/10W, 0603 VISHAY, CRCW06032R20JNEA 15 2 R15, R19 RES, 10k, 5%, 1/10W, 0603 VISHAY, CRCW060310K0JNEA 16 1 R22 RES, 38.3k, 1%, 1/10W, 0603 VISHAY, CRCW060338K3FKEA 17 1 R24 RES, 232k, 1%, 1/10W, 0603 VISHAY, CRCW0603232KFKEA 18 2 R25, R28 RES, 12.1k, 1%, 1/10W, 0603 VISHAY, CRCW060312K1FKEA 19 2 R26, R45 RES, 22.1k, 1%, 1/10W, 0603 VISHAY, CRCW060322K1FKEA 20 1 R36 RES, 100Ω, 5%, 1/10W, 0603 VISHAY, CRCW0603100RJNEA 21 8 RSNS1-RSNS8 RES, 0.003Ω, 1%, 1W, 2512 PANASONIC, ERJM1WSF3M0U 22 2 U1, U2 IC, LTC3787EUFD#PBF LINEAR TECHNOLOGY, LTC3787EUFD#PBF Additional Demo Board Circuit Components 1 0 C3, C6, C12, C18, C20, C28 CAP, OPTIONAL, 0603 2 0 R2, R3, R7, R10, R13, R16, R34, R46-R49 RES, OPTIONAL, 0603 3 18 R4, R8-R9, R12, R14, R18, R21, R23, R27, RES, 0Ω, JUMPER, 0603 R29-R30, R33, R37-R38, R40, R42-R44 4 0 Q1B, Q3B, Q5B, Q7B VISHAY, CRCW06030000Z0EA XSTR, MOSFET N-CHAN OPTIONAL dc2001af 4 DEMO MANUAL DC2001A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER HEADER, 4-PIN, 2mm SULLINS, NRPN041PAEN-RC Hardware: For Demo Board Only 2 1 JP1 3 1 JP2 HEADER, 3-PIN, 2mm SULLINS, NRPN031PAEN-RC 8 2 JP1, JP2 SHUNT SAMTEC, 2SN-BK-G 1 11 E1-E2, E5, E7-E13, E17 TURRET MILL-MAX, 2501-2-00-80-00-00-07-0 4 8 E3-E4, E6, E14-E16, E18-E19 STUD, TEST PIN PEM, KFH-032-10 6 8 E3-E4, E6, E14-E16, E18-E19 LUG RING, #10 KEYSTONE, 8205 7 8 E3-E4, E6, E14-E16, E18-E19 WASHER, #10 TIN PLATED BRASS ANY #10 EXT BZ TN 5 16 E3-E4, E6, E14-E16, E18-E19 (×2) NUT, BRASS 10-32 ANY #10-32 9 4 MH1, MH2, MH3, MH4 STANDOFF, SNAP-ON KEYSTONE, 8834 dc2001af 5 A B C JP2 RUN E12 JP1 3 2 1 4 3 2 1 R15 R22 38.3K 1% R25 12.1K 1% 10K R19 10K R47 OPT R46 OPT C5 10pF C6 OPT 0 R9 OPT R7 C3 C1 0.01uF 0 R23 10 R20 R17 10 4 R27 0 10pF C15 C13 R28 12.1K 1% 10pF C12 OPT SENSE2+ 8 7 6 232K 1% R24 C10 0.01uF C8 0.1uF 4 3 2 1 OPT SGND 5 0.01uF C32 1. ALL CAPACITORS AND RESISTORS ARE 0603. [2] - FOR VIN < VOUT ONLY [3] - SURGE VOLTAGE UP TO 30V 5 10 R6 10 R14 0 0 R12 NOTES: UNLESS OTHERWISE SPECIFIED, OFF ON RUN E9 E5 MODE CLKIN PHASMD R29 0 22.1K R26 15 16 17 18 19 20 21 D2 C16 1000pF C14 3 0.1uF C7 2.2 C9 4.7uF 25V 0805 BAS140W C4 1uF 16V OPT R11 4 123 4 COUT2A 22uF 25V 1812 5 4 4 COUT1B 22uF 25V 1812 5 C:\DESIGN\20\2001A-1\2001A-1.DSN 2 L1 1.0uH MI/RB 0.003 2512 RSNS4 RSNS3 CIN2B 22uF 25V 1812 CIN3B 22uF 25V 1812 CIN3A 22uF 25V 1812 N/A TECHNOLOGY DATE GND GND GND VIN 6V - 24V VIN+ JOSHUA Y. APPROVED GND GND GND VOUT 24V / 12VIN TO 30A VOUT+ GND EXTVCC E17 E16 E15 E14 E19 E13 E8 E10 E11 E6 330uF 35V E4 + CIN6 E3 E18 E2 06/11/12 OPT R16 OPT R13 330uF 35V + CIN5 VOUT CIN4B 22uF 25V 1812 CIN4A 22uF 25V 1812 PROD 1 1 LTC3787EUFD DEMO CIRCUIT 2001A 01/02/13 12:20:49 2 1 HIGH CURRENT 4-PHASE SYNCHRONOUS BOOST CONVERTER 1 REVISION HISTORY DESCRIPTION MASTER COUT6 + 330uF 35V CIN1B 22uF 25V 1812 COUT3 330uF 35V CIN2A 22uF 25V 1812 + 1 REV CIN1A 22uF 25V 1812 SER2010-102ML COILCRAFT COUT2B 22uF 25V 1812 Q1B 1 2 3 OPT 5 0.003 2512 ECO COUT5B 22uF 25V 1812 RSNS2 RSNS1 COUT4B 22uF 25V 1812 Q2B BSC014N04LSI 123 Q4B BSC014N04LSI 123 5 SER2010-102ML COILCRAFT COUT1A 22uF 25V 1812 4 5 123 123 4 COUT5A 22uF 25V 1812 L2 1.0uH COUT4A 22uF 25V 1812 2 0 R21 Q1A BSC014N04LSI 0 R18 Q2A BSC014N04LSI 4 123 Q3B 5 OPT Q4A BSC014N04LSI 5 0 5 123 R10 4 BAS140W D1 0 R4 Q3A BSC014N04LSI 3 R8 0.01uF C11 0.1uF 22 C2 0.1uF R1 100K 10 R5 SENSE1+ 11 R3 OPT E1 26 12 D 9 PGOOD R2 OPT SENSE1- 28 27 24 25 23 13 4 14 6 29 5 A B C D DEMO MANUAL DC2001A Schematic Diagram dc2001af 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 CLKOUT E7 100 R36 5 R49 OPT R48 OPT C22 10pF C20 OPT 10 R41 R39 10 0 R38 SENSE4+ 4 C28 OPT 8 7 6 SGND 5 C26 0.01uF SENSE4- C24 0.1uF 0.01uF C33 R37 0 3 2 1 OPT C18 SENSE3- 10 R32 C17 0.01uF 4 0 R44 R42 0 10pF C29 9 R45 22.1K 15 16 17 18 19 20 0.01uF C31 1000pF C30 C27 0.1uF 21 22 C19 0.1uF 10 R31 10 11 D SENSE3+ 12 27 26 13 28 25 23 24 14 4 29 5 D4 3 4 Q5A 4 COUT10A 22uF 25V 1812 4 5 4 4 COUT11A 22uF 25V 1812 123 5 123 4 Q8B BSC014N04LSI SER2010-102ML COILCRAFT 5 COUT11B 22uF 25V 1812 2 MI/RB COUT10B 22uF 25V 1812 5 L3 1.0uH COUT12 330uF 35V N/A CIN9B CIN10B 22uF 22uF 25V 25V 1812 1812 1 CIN9A CIN10A 22uF 22uF 25V 25V 1812 1812 330uF 35V 330uF 35V 1 2 LTC3787EUFD DEMO CIRCUIT 2001A 12/17/12 06:13:00 2 1 HIGH CURRENT 4-PHASE SYNCHRONOUS BOOST CONVERTER TECHNOLOGY + CIN12 + CIN11 SLAVE + 0.003 2512 RSNS8 RSNS7 CIN8B 22uF 25V 1812 CIN8A 22uF 25V 1812 COUT9 330uF 35V CIN7A 22uF 25V 1812 + CIN7B 22uF 25V 1812 0.003 2512 RSNS6 RSNS5 COUT8B 22uF 25V 1812 SER2010-102ML COILCRAFT Q6B BSC014N04LSI 123 123 5 2 COUT7B 22uF 25V 1812 L4 1.0uH COUT8A 22uF 25V 1812 Q5B 1 2 3 OPT COUT7A 22uF 25V 1812 0 R43 BSC014N04LSI 0 R40 Q6A BSC014N04LSI 0 5 123 123 Q7B 5 OPT Q8A BSC014N04LSI R33 4 123 5 0.1uF C23 2.2 OPT R35 R34 C25 4.7uF 25V 0805 BAS140W C21 1uF 16V 4 BAS140W D3 0 R30 Q7A BSC014N04LSI 3 A B C D DEMO MANUAL DC2001A Schematic Diagram dc2001af 7 DEMO MANUAL DC2001A 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 dc2001af 8 Linear Technology Corporation LT 0113 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2013