DEMO MANUAL DC1543A LTM4641 38V, 10A, Step-Down Module Regulator with Advanced Input and Load Protection DESCRIPTION Demonstration circuit 1543A features the LTM(R)4641, a high efficiency, high density switch mode step-down power Module regulator with superior input and load protection features. The input voltage range is from 4.5V to 38V. The output voltage is jumper programmable from 0.8V to 6V with a rated load current of 10A. Derating is necessary for certain VIN, VOUT, frequency and thermal conditions. DC1543A offers the TRACK/SS pin allowing the user to program output tracking or soft-start period. The DC1543A allows the user to enable/disable input undervoltage protection; input latching/non-latching overvoltage protection; and latching/non-latching overtemperature protection. Higher efficiency at low load currents is achieved by setting the MODE pin jumper to DCM. The LTM4641 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit 1543A. Design files for this circuit board are available. All registered trademarks and trademarks are the property of their respective owners. PERFORMANCE SUMMARY PARAMETER CONDITIONS Input Voltage Range VALUE 4.5V to 38V Output Voltage VOUT Jumper Selectable 0.8V, 1.0V, 1.2V, 1.5V, 1.8V, 3.3V, 5V, 6V; 1.5% Maximum Continuous Output Current Derating is Necessary for Certain Operating Conditions. See Data Sheet for Details. 10ADC Default Operating Frequency RfSET = 680k for VOUT = 0.8V, 1.0V, 1.2V, 1.5V, 1.8V; RfSET = (Not Stuffed) for VOUT = 3.3V, 5.0V, 6.0V 255kHz (VOUT = 0.8V); 320kHz (VOUT = 1.0V); 385kHz (VOUT = 1.2V); 480kHz (VOUT = 1.5V); 575kHz (VOUT = 1.8V); 360kHz (VOUT = 3.3V); 550kHz (VOUT = 5.0V); 660kHz (VOUT = 6.0V); Efficiency VIN = 12V, VOUT = 6V, IOUT = 10A 93.0% See Figure 2 Load Transient VIN = 12V, VOUT = 3.3V See Figure 3 BOARD PHOTO Rev. B 1 DEMO MANUAL DC1543A QUICK START PROCEDURE Demonstration circuit 1543A is an easy way to evaluate the performance of the LTM4641. Please refer to Figure 1 for proper measurement equipment setup and follow the procedure below: parameters. Output voltage ripple may be measured at J6 with a BNC cable and oscilloscope. The probe channel for VOUT should be set at 50 termination resistance to match the BNC cable. 1. Place jumpers in the following positions for a typical 3.3VOUT application: 5. (Optional) For optional load transient test, apply an adjustable pulse signal between IOSTEP_CLK and GND test points. The pulse amplitude sets the load step current amplitude. Keep the pulse width short (<1ms) and pulse duty cycle low (<5%) to limit the thermal stress on the load transient circuit. The load step current can be monitored with a BNC connected to J5 (25mV/A). INPUT OVLO NON-LATCH INPUT OVP INPUT UVLO OVER-TEMP BEHAVIOR OFF OFF OFF NON-LATCH RUN MODE TRACK/SS VOUT Select ON CCM SS 3.3V FSET VOUT > 3.0V 2. With power off, connect the input power supply, load and meters as shown in Figure 1. Preset the load to 0A and VIN supply to be 0V. 3. Turn on the power at the input. Increase VIN to 12V (Do not apply more than the rated maximum voltage of 38V to the board or the part may be damaged). The output voltage should be regulated and deliver the selected output voltage 1.5%. 4. Vary the input voltage from 4.5V to 38V and adjust the load current from 0A to 10A. Observe the output voltage regulation, ripple voltage, efficiency, and other 2 6. (Optional) To test the advanced input and load protections, put the corresponding jumper in the "ON" position. For DC1543A, the thresholds for different input and output protections are set as shown below: INPUT OVLO 36V NON-LATCH INPUT OVP 32V INPUT UVLO 8V for Rising Edge 7V for Falling Edge OVER-TEMP LATCH 145C BEHAVIOR NON-LATCH 145C: Cease Regulation 135C: Resume Regulation Rev. B DEMO MANUAL DC1543A QUICK START PROCEDURE - - LOAD + + - + - + - + VIN + - Note: Demo circuit 1543A demonstrates a functional but outdated square pad layout for LTM4641. Refer to the design files recommending round pads for future PCB designs. Figure 1. Proper Measurement Equipment Setup Rev. B 3 DEMO MANUAL DC1543A QUICK START PROCEDURE Efficiency vs Load Current at 24VIN 95 90 90 85 85 80 80 75 70 65 3.3VOUT, 360kHz 2.5VOUT, 335kHz 1.8VOUT, 325kHz 1.5VOUT, 315kHz 1.2VOUT, 285kHz 1.0VOUT, 255kHz 0.9VOUT, 235kHz 60 55 50 45 40 0 1 2 3 4 5 6 7 8 OUTPUT CURRENT (A) 9 EFFICIENCY (%) EFFICIENCY (%) Efficiency vs Load Current at 6VIN 95 75 70 6.0VOUT, 660kHz 5.0VOUT, 550kHz 3.3VOUT, 360kHz 2.5VOUT, 335kHz 1.8VOUT, 325kHz 1.5VOUT, 315kHz 1.2VOUT, 285kHz 1.0VOUT, 255kHz 0.9VOUT, 235kHz 65 60 55 50 45 40 10 0 1 2 2a. VIN = 6V 90 90 85 85 80 80 75 6.0VOUT, 660kHz 5.0VOUT, 550kHz 3.3VOUT, 360kHz 2.5VOUT, 335kHz 1.8VOUT, 325kHz 1.5VOUT, 315kHz 1.2VOUT, 285kHz 1.0VOUT, 255kHz 0.9VOUT, 235kHz 60 55 50 45 40 0 1 2 3 4 5 6 7 8 OUTPUT CURRENT (A) 2b. VIN = 12V 10 Efficiency vs Load Current at 36VIN 95 EFFICIENCY (%) EFFICIENCY (%) Efficiency vs Load Current at 12VIN 65 9 2c. VIN = 24V 95 70 3 4 5 6 7 8 OUTPUT CURRENT (A) 9 75 70 6.0VOUT, 660kHz 5.0VOUT, 550kHz 3.3VOUT, 360kHz 2.5VOUT, 335kHz 1.8VOUT, 325kHz 1.5VOUT, 315kHz 1.2VOUT, 285kHz 1.0VOUT, 255kHz 0.9VOUT, 235kHz 65 60 55 50 45 10 40 0 1 2 3 4 5 6 7 8 OUTPUT CURRENT (A) 9 10 2d. VIN = 36V Figure 2. Measured DC1543A Efficiency at Different VIN, VOUT and fSW (CCM Mode Enabled) Please refer to Table 1 in LTM4641 data sheet for the switching frequency at each output voltage. 4 Rev. B DEMO MANUAL DC1543A QUICK START PROCEDURE VOUT: 50mV/DIV IOUT_STEP: 4A/DIV 3a. VIN = 12V, VO = 3.3V, 0A to 4A Load Step VOUT: 20mV/DIV IOUT_STEP: 4A/DIV 3b. VIN = 12V, VO = 1.0V, 0A to 4A Load Step Figure 3. Measured Load Transient Responses VIN = 24V, VOUT =6V, ILOAD = 10A, Ambient Temperature = 29.4C, No Forced Air Flow Figure 4. Thermal Image of LTM4641 Rev. B 5 DEMO MANUAL DC1543A PARTS LIST ITEM QTY REFERENCE Required Circuit Components 1 2 CIN2, CIN1 2 2 CIN3, CIN4 3 3 CO1, CO2, CO8 4 3 CO3, CO4, CO5 5 1 C10 6 1 R1 7 2 R5, R7 8 2 R13, R26 9 1 U1 Hardware/Components (For Demo Board Only) 1 1 C2 2 2 C8, C9 3 1 R2 4 1 R15 5 1 R17 6 1 R18 7 1 R19 8 1 R20 9 1 R21 10 1 R22 11 1 R23 12 1 R25 13 1 R28 14 1 R10 15 1 R24 16 1 R16 17 1 R9 18 2 R12, R8 19 3 R6, R31, R34 20 2 R3, R32 21 2 RS2, RS1 22 1 Q2 23 1 Q3 24 1 Q1 25 0 C3, C4, C5, C6, C7(OPT) 26 0 CIN5(OPT) 27 0 R4, R27, R29, R33, R35, R36(OPT) 28 0 R11(OPT) 29 0 D2 (OPT) Hardware 1 9 JP1-JP8, JP18 2 8 JP9-JP15, JP18 3 3 JP4, JP9-JP15, JP17 4 2 J5, J6 5 4 J1-J4 6 13 E2, E5-E8, E11, E12, E15-E20 7 1 JP16 8 4 STAND OFF 6 PART DESCRIPTION MANUFACTURER/PART NUMBER CAP., ALUMINUM, 100F, 50V CAP., X7R, 4.7F, 50V, 10%, 1210 CAP., POSCAP, 150F, 10V, D3L CAP., X7R, 47F, 10V, 10%, 1210 CAP., X5R, 3300pF, 50V, 10%, 0603 RES., CHIP, 13.7k, 1/16W, 1%, 0603 RES., CHIP, 100k, 1/16W, 1%, 0603 RES., CHIP, 2.49k, 1/16W, 0.1%, 0603 I.C., LTM4641, BGA SUN ELECT, 50CE100LX AVX, 12105C475KAT2A PANASONIC, 10TPF150ML AVX, 1210ZC476KAT2A AVX, 06035C332KAT2A VISHAY, CRCW060313K7FKEA VISHAY, CRCW0603100KFKEA VISHAY, TNPW06032K49BEEA ANALOG DEVICES, LTM4641EY#PBF CAP., X7R, 4.7F, 25V, 10%, 0805 CAP., X5R, 8200pF, 50V, 10%, 0603 RES., CHIP, 680k, 1/16W, 1%, 0603 RES., CHIP, 2.2M, 1/16W, 1%, 0603 RES., CHIP, 165k, 1/16W, 1%, 0603 RES., CHIP, 7.15k, 1/16W, 1%, 0603 RES., CHIP, 4.12k, 1/16W, 1%, 0603 RES., CHIP, 2.94k, 1/16W, 1%, 0603 RES., CHIP, 1.18k, 1/16W, 1%, 0603 RES., CHIP, 715, 1/16W, 1%, 0603 RES., CHIP, 576, 1/16W, 1%, 0603 RES., CHIP, 3.16k, 1/16W, 1%, 0603 RES., CHIP, 24.9k, 1/16W, 1%, 0603 RES., CHIP, 1.78M, 1/16W, 1%, 0603 RES., CHIP, 13k, 1/16W, 1%, 0603 RES., CHIP, 1M, 1/16W, 1%, 0603 RES., CHIP, 187k, 1/16W, 1%, 0603 RES., CHIP, 10, 1/16W, 1%, 0603 RES., CHIP, 0, 1/16W, 1%, 0603 RES., CHIP, 10k, 1/16W, 1%, 0603 RES., CHIP, 0.05, 1W, 1% 2512 SILICON N-CHANNEL MOSFET, POWERPAK-SO8 SILICON N-CHANNEL POWER MOSFET, LFPAK N-CHANNEL 40-V MOSFET, TO-252 CAP., 0603 CAP., 1210 RES., 0603 RES., 1206 ZENER VOLTAGE REGULATOR, SOD-523 TDK, C2012X7RIE475K125AB AVX, 06035C822KAT2A YAGEO, RC0603FR-07680KL VISHAY, CRCW06032M20FKEA VISHAY, CRCW0603165KFKEA VISHAY, CRCW06037K15FKEA VISHAY, CRCW06034K22FKEA VISHAY, CRCW06032K94FKEA VISHAY, CRCW06031K18FKEA VISHAY, CRCW0603715RFKEA VISHAY, CRCW0603576RFKEA VISHAY, CRCW06033K16FKEA VISHAY, CRCW060324K9FKEA VISHAY, CRCW06031M78FKEA VISHAY, CRCW06065K5KFKEA VISHAY, CRCW06031M00FKEA VISHAY, CRCW0603187KFKEA VISHAY, CRCW060310R0FKEA VISHAY, CRCW06030000Z0EA VISHAY, CRCW060310K0FKEA VISHAY, WSL2512R0500FEA VISHAY, SiR184DP-T1-RE3 NEXPERIA PSMN2R5-30YL VISHAY, SUD50N04-8M8P-4GE3 2mm SINGLE ROW HEADER, 2-PIN 2mm SINGLE ROW HEADER, 3-PIN SHUNT CONN, BNC, 5 PINS JACK, BANANA TESTPOINT, TURRET, 0.095" ULTRA-SMALL TRACTILE SWITCH STAND-OFF, NYLON 0.50" tall SAMTEC, TMM102-02-L-S SAMTEC, TMM-103-02-L-S SAMTEC, 2SN-BK-G CONNEX, 112404 KEYSTONE, 575-4 MILL-MAX, 2501-2-00-80-00-00-07-0 PANASONIC, EVQPE105K KEYSTONE, 8833 (SNAP ON) CENTRAL SEMI., CMOZ43V TR Rev. B DEMO MANUAL DC1543A SCHEMATIC DIAGRAM Rev. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. 7 DEMO MANUAL DC1543A ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality. Legal Terms and Conditions By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the "Evaluation Board"), you are agreeing to be bound by the terms and conditions set forth below ("Agreement") unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you ("Customer") and Analog Devices, Inc. ("ADI"), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal, temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and agrees that the Evaluation Board is provided for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted is expressly made subject to the following additional limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board; and (ii) permit any Third Party to access the Evaluation Board. As used herein, the term "Third Party" includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is NOT sold to Customer; all rights not expressly granted herein, including ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI. Customer may not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited to soldering or any other activity that affects the material content of the Evaluation Board. Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED "AS IS" AND ADI MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER'S POSSESSION OR USE OF THE EVALUATION BOARD, INCLUDING BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI'S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT OF ONE HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable United States federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of Massachusetts (excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby submits to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed. 8 Rev. B 4/19 www.analog.com ANALOG DEVICES, INC. 2011-2019