background image

14

DEMO MANUAL DC2787A

Rev. 0

 

ANALOG DEVICES, INC. 2019

11/19

www.analog.com

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.

Содержание 2787A

Страница 1: ...the property of their respective owners PERFORMANCE SUMMARY voltage ripple to enable much higher power applications Other benefits include low EMI emissions due to a soft switched front end and reduced MOSFET stress The LTC7821 design eliminates the inrush current typically associated with switched capacitor circuits by prebalancing the capacitors on start up The LTC7821 also monitors sys tem volt...

Страница 2: ...2 DEMO MANUAL DC2787A Rev 0 BOARD PHOTO Figure 1 4x LTC7821 100A DC2787A Demo Circuit ...

Страница 3: ...hin the operating range and measure the efficiency output ripple voltage and other parameters 9 After completing all tests adjust the load to 0A power off the input power supply Notes 1 When measuring the output or input voltage ripple do not use the long ground lead on the oscilloscope probe See Figure 3 for the proper scope probe technique Short stiff leads need to be soldered to the and termina...

Страница 4: ...4 DEMO MANUAL DC2787A Rev 0 QUICK START PROCEDURE V Load 0 100A 1mΩ V V VIN 40V 60V A Figure 2 Proper Measurement Equipment Setup Figure 3 Measuring Output Voltage Ripple ...

Страница 5: ...g vs Load Current at VIN 48V VOUT 12V fSW 400kHz DC2787A F04 90 92 94 96 98 100 0 20 40 60 80 100 EFFICIENCY 40VIN 48VIN 60VIN OUTPUT LOAD CURRENT A DC2787A F05 0 5 10 15 20 25 30 0 20 40 60 80 100 LOAD CURRENT PER PHASE A TOTAL LOAD CURRENT A PHASE 1 PHASE 2 PHASE 3 PHASE 4 Efficiency vs Load Current Current Sharing vs Load Current ...

Страница 6: ... DIV VOUT 20MHz BW 100mV DIV 50A 75A 50A LOAD 20A DIV 2787A F06 Figure 6 Load Step at VIN 48V VOUT 12V Figure 7 Thermal performance VIN 48V VOUT 12V IOUT 100A TA 23 C No Airflow Figure 8 Thermal performance VIN 48V VOUT 12V IOUT 100A A 23 C 200LFM Airflow ...

Страница 7: ...V 10 0603 AVX 06033C472KAT2A 10 8 C42 C44 C57 C84 C89 C97 C152 C155 CAP 150uF ALUM OS CON 16V 20 8x6 9mm SMD RADIAL PANASONIC 16SVPC150M 11 4 C45 C110 C156 C215 CAP 27pF C0G 250V 5 0603 MURATA GQM1875C2E270JB12D 12 2 C52 C53 CAP 22uF X5R 25V 10 1210 MURATA GRM32ER61E226KE15K 13 1 C54 CAP 0 047uF X7R 25V 10 0603 AVX 06033C473KAT2A 14 1 C55 CAP 220pF C0G 50V 5 0603 AVX 06035A221JAT2A 15 4 C255 C257 ...

Страница 8: ...741V 34 4 R23 R75 R244 R259 RES AEC Q200 60 4k OHMS 1 1 10W 0603 VISHAY CRCW060360K4FKEA 35 4 R25 R66 R245 R248 RES AEC Q200 4 32k OHMS 1 1 10W 0603 VISHAY CRCW06034K32FKEA 36 1 R26 RES 182k OHMS 1 1 10W 0603 AEC Q200 PANASONIC ERJ3EKF1823V 37 1 R27 RES 20k OHMS 5 1 10W 0603 AEC Q200 NIC NRC06J203TRF 38 1 R29 RES 80 6k OHMS 1 1 10W 0603 VISHAY CRCW060380K6FKEA 39 2 R30 R247 RES 0 2 OHM 1 1 2W 2010...

Страница 9: ... 3 2 J5 J6 CONN RF BNC RCPT JACK 5 PIN STR THT 50 Ohms AMPHENOL RF 112404 4 4 J1 J4 RING LUG CRIMP 10 NON INSULATED SOLDERLESS TERMINALS KEYSTONE 8205 5 8 J1 J4 NUT HEX 10 32 BRASS PENCOM NU1132 6 1 JP2 CONN HDR MALE 1x3 2mm STR THT NO SUBS ALLOWED Wurth Elektronik 62000311121 7 4 J1 J4 WASHER 10 LOCK EXT TIN FINISH PENCOM WA4526 8 6 MH1 MH6 STANDOFF NYLON SNAP ON 0 625 KEYSTONE 8834 9 1 XJP2 CONN...

Страница 10: ... CUSTOMER NOTICE ANALOG DEVICES INC 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 ANALOG DEVICES INC APPLICATIONS ENGINE...

Страница 11: ... DC2787A_REV03 705 DC2787A_REV03 N A Thursday May 16 2019 CONVERTER C127 C132 R40 0 C290 OPT C147 C106 0 22uF C122 C139 10uF 100V 1210 C292 OPT C86 2 2uF 1210 100V C125 10uF 100V 1210 C128 R255 0 C95 0 1uF D6 CMDSH 4E 2 1 C107 0 1uF C111 10uF 100V 1210 C143 C293 OPT R37 100k Q8 BSC014N04LSI 4 5 6 7 8 3 1 2 U2 LTC7821EUH MODE PLLIN 1 CLKOUT 2 RUN 3 FAULTB 4 PGOOD 5 TIMER 6 TRACK SS 7 EXT_REF 8 ISEN...

Страница 12: ...MO CIRCUIT SCHEMATIC APPROVALS PCB DES APP ENG Phone 1 408 432 1900 Milpitas CA 95035 1630 McCarthy Blvd For ADI Customer Use Only CUSTOMER NOTICE ANALOG DEVICES INC 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 PRINT...

Страница 13: ...2787A_REV03 710 DC2787A_REV03 705 DC2787A_REV03 N A Thursday May 16 2019 CONVERTER C138 R264 0 C185 10uF 100V 1210 R267 0 R74 OPT Q37 OPT 4 5 6 7 8 3 1 2 C136 C209 2 2uF 1210 100V C291 OPT C188 C180 100V J6 IOSTEP C210 2 2uF 1210 100V R68 53 6k 1 R59 1k R235 OPT C157 2 2uF Q14 BSC014N04LSI 4 5 6 7 8 3 1 2 C149 1210 E9 GND C47 2 2uF 1210 J5 VOUT R278 0 C116 RN4 OPT t R268 0 Q11A1 OPT 5 6 7 4 2 3 8 ...

Страница 14: ...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 damage...

Отзывы: