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Evaluation Board User Guide

1. functionality 11137 002 Figure 2 Single Supply and Double Supply Board Terminals Rev 0 Page 4 of 12 Output Power Connections An output load can be connected to P7 labeled OUT1 which is the isolated regulated 5 V output supply Connect the return of the load to P8 labeled ISO_GND which is the Side 2 ground reference Including the current necessary for the ADuM4471 secondary side I O and pulse width modulation control this supply can provide up to 500 mA in the default configuration a 5 V primary input supply with a 5 V secondary isolated supply The isolated data channels on Side 2 load the secondary isolated supply and reduce the total available current Figure 4 through Figure 7 show how the efficiency of the power supply varies with load current switching frequency and temperature Care must be taken to avoid driving an output pin with an external voltage because this can result in permanent damage to the ADuM4471 Data I O Connection The EVAL ADuM4471EBZ supports a variety of I O configu rations The user has access to all four of the ADuM4471 digital isolation channels via the terminals With an ADuM4471 populated I O1 through I O3 are inputs on Side 1 and outputs on Side 2 I 04 is an output on Side 1 and an input on Side 2 Table 4 identifies the ADuM4471 pins to which I Ox are connected Populating J6 allows the user to connect the ADuM4471 Via input directly to a 50 Q signal source R30 must be shorted
2. functions of the terminal connections These connections are described in detail in the Input Power Connections and Output Power Connections sections Table 6 Double Supply Terminal Function Descriptions Terminal Label Description P1 5V Side 1 5 V primary input supply P2 GND Side 1 ground reference P9 OUT2 Side 2 7 5 V secondary isolated supply unregulated P10 ISO_GND Side 2 ground reference P7 OUT1 Side 2 15 V secondary isolated supply regulated P8 ISO_GND Side 2 ground reference Input Power Connections Connect 5 V to P1 labeled 5V and connect the negative end of the supply to P2 labeled GND These are the only off board connections required for the board to function in double supply configuration Connect the 5 V input supplies Von and Vora to the ADuM4471 U1 in double supply configuration Vpn is the ADuM4471 transformer driver supply and Vopa is the primary supply voltage see the ADuM4470 ADuM4471 ADuM4472 ADuM4473 ADuM4474 data sheet for additional information Von and Vppa are bypassed by a 47 uF ceramic capacitor C3 and a 0 1 uF local bypass capacitor C8 located close to the ADuM4471 R4 R3 C4 and C5 are provided for an optional and unpopulated snubber which can be used to reduce radiated emissions Output Power Connections Output loads can be connected to P9 labeled OUT2 and P7 labeled OUT1 which are the isolated unregulated 7 5 V and regulated
3. switching frequency that can be set from 200 kHz to 1000 kHz This user guide provides all the necessary details to set up and use the EVAL ADuM4471EBZ board Although the EVAL ADuM4471EBZ comes with the ADuM4471 switching regulator on board the printed circuit board PCB is designed for compatibility with the entire ADuM447x family Additional information about the supported iCoupler devices is available in the ADuM4470 ADuM4471 ADuM4472 ADuM4473 ADuM4474 data sheet which should be consulted in conjunction with this user guide when using the EVAL ADuM4471EBZ board EVAL ADUM4471EBZ BOARD PHOTOGRAPH SS A 11137 001 Figure 1 Single Supply and Double Supply Configurations See the last page for an important warning and disclaimers Rev 0 Page 1 of 12 TABLE OF CONTENTS Features EA E a a ecto a 1 Other Input and Isolated Output Supply Options 6 Supported iCoupler Models 00 0 eessessessessessesseseeseeseeseeseeseeneeseess 1 Double Supply General Description Terminals ysis EVAL ADuM4471EBZ Board Photograph Transformer Selection Revisio m History ssssiicecescscceessosssesesosucossessedesesotedesensdusesesedsiesvvovedoseenbss Switching Frequency Options Configuring the Board for Single or Double Supply Output 3 Other Secondary Isolated Supply Configurations Single Supply Evaluation Board Schematics and Artwork cseeseeseesseeees Terminals ssesss cas css steccteseessbve se
4. to 5 V and having R10 short circuited sets the supply to 3 3 V See the ADuM4470 ADuM4471 ADuM4472 ADuM4473 ADuM4474 data sheet for more information about setting the secondary isolated output supply voltage Figure 7 shows how the efficiency curves change in single supply configuration when the board is reconfigured by open or short circuiting R10 90 80 70 60 EFFICIENCY 0 50 100 150 200 250 300 350 400 LOAD CURRENT mA 11137 004 Figure 4 5 V Input to 5 V Output Efficiency Using a 1CT 2CT Coilcraft Transformer CR7983 CL at Various Switching Frequencies EFFICIENCY 0 50 100 150 200 250 300 350 400 LOAD CURRENT mA 11137 005 Figure 5 5 V Input to 5 V Output Efficiency Using a 1CT 2CT Coilcraft Transformer CR7983 CL at 500 kHz and Various Temperatures 90 80 70 60 50 40 1MHz 700kHz 500kHz 200kHz EFFICIENCY 30 20 10 0 0 50 100 150 200 250 300 350 400 LOAD CURRENT mA 11137 006 Figure 6 5 V Input to 5 V Output Efficiency Using a 1CT 2CT Halo Electronics Transformer TGRAD 560V8LF at Various Switching Frequencies 80 70 60 50 40 EFFICIENCY 30 5V IN TO 5V OUT 20 5V IN TO 3 3V OUT 3 3V IN TO 3 3V OUT 10 0 0 50 100 150 200 2
5. with a 0 Q resistor to connect the SMA to Via R27 R28 and R29 allow the user to implement various I O interconnection schemes For example soldering 0 Q 0805 resistors to R27 and R28 ties Vis Vis and Vic together Note that R29 must not be populated if an external signal source is applied to 1 03 This can cause permanent damage to the ADuM4471 because an output pin is being driven R29 can be used to connect Vic to Von so that Von drives Vic C9 through C11 and C13 should not be populated when an ADuM4471 is equipped C12 C14 C15 and C16 are 0603 pads for optional and unpopulated loads for the data outputs The PCB is designed for compatibility with the entire ADuM447x family If another ADuM447x replaces the ADuM4471 other I O interconnection schemes are possible See the ADuM4470 ADuM4471 ADuM4472 ADuM4473 ADuM4474 data sheet for the pin descriptions of these configurations These changes are at the discretion of the user Care must be taken to avoid driving an output pin with an external voltage because this can result in permanent damage to the switching regulator Table 4 Single Supply Terminal Connections ADuM4471 Connection Terminal Pin Mnemonic Pin Description J6 1 5V IN Vopa Side 1 5 V primary input supply 2 1 01 Via Side 1 Logic Input A 3 1 02 Vis Side 1 Logic Input B 4 1 03 Vic Side 1 Logic Input C 5 1 04 Vop Side 1 Logic Output D 6 GND GND Side 1 ground reference
6. 0 5 kQ 5V Single 17 4 kQ Open 14 3 KQ 10 5 kQ 12 V Double 90 9 kQ oQ 24 9 kQ 10 5 kQ 15 V Double 90 9 kQ Open 24 9 kQ 10 5 KQ After setting the feedback divider and output mode resistors refer to the Single Supply or Double Supply section for additional information about configuring the EVAL ADuM4471EBZ board Rev 0 Page 3 of 12 SINGLE SUPPLY The ADuM4471 switching regulator on this evaluation board can be configured for single supply output When the switching regulator is set to single supply mode the feedback divider resistors should be configured as described in Table 1 and the output mode resistors should be configured as described in Table 2 By default the single supply configuration provides a 5 V secondary isolated supply with a 5 V primary input supply which can provide up to 2 5 W of regulated isolated power The single supply can be reconfigured as a 3 3 V secondary isolated supply with a 5 V or 3 3 V primary input supply See the Other Input and Isolated Output Supply Options section for more information TERMINALS In the single supply configuration the EVAL ADuM4471EBZ board has terminal blocks on Side 1 the primary power supply input side and Side 2 the secondary power supply output side An 8 0 mm isolation barrier separates Side 1 from Side 2 Figure 2 shows the location of these terminals Table 3 summarizes the functions of the terminal connections These connections are described in mo
7. 15 V output supplies respectively Connect the return of the load to P10 and P8 which are labeled ISO_GND Side 2 is powered by the secondary isolated 15 V supply The ADuM4471 internal low dropout regulator converts this voltage to 5 V The regulated 5 V supply powers the ADuM4471 secondary side Therefore the ADuM4471 Vasc pin is 15 V and the Vpp2 pinis 5 V The 15 V supply connects to P7 labeled OUT1 The 7 5 V supply connects to P9 labeled OUT2 The Side 2 ground reference is tied to P10 See the ADuM4470 ADuM4471 ADuM4472 ADuM4473 ADuM4474 data sheet for an explanation of the double supply theory of operation Figure 8 through Figure 11 show efficiency curves for the double supply with the 15 V or 12 V isolated output supply connected to Vrzc Powering Vres from the Unregulated 7 5 V Supply Vrec can be powered from the unregulated 7 5 V supply which results in higher efficiency However when the 15 V supply is unloaded the unregulated 7 5 V supply is approximately 3 V which is insufficient for powering the ADuM4471 secondary side This causes the double supply to run open loop leaving the 15 V supply unregulated Using 15 V for Vrsc ensures that the secondary side of the ADuM4471 powers up under light load conditions Move the 0 Q 0603 resistor from R8 to R9 to power Side 2 from the 7 5 V supply Care must be taken to avoid driving an output pin because this can result in permanent damage to the ADuM4471 TRANSFORMER SELE
8. 50 300 350 400 LOAD CURRENT mA 11137 007 Figure 7 Single Supply Efficiency for Various Output Configurations Using a 1CT 2CT Coilcraft Transformer CR7983 CL at 500 kHz Rev 0 Page 6 of 12 DOUBLE SUPPLY The ADuM4471 switching regulator on this evaluation board can be configured for double supply output for more information about the transformer see the Transformer Selection section When the ADuM4471 is set to double supply mode the feedback divider resistors should be configured as described in Table 1 and the output mode resistors should be configured as described in Table 2 By default the double supply configuration provides a regulated 15 V output and an unregulated 7 5 V output which are isolated from the 5 V primary input supply The double supply is capa ble of delivering up to 140 mA to external loads The isolated data channels on Side 2 load the secondary isolated supply and reduce the total available current The double supply can be reconfigured as 12 V regulated and 6 V unregulated secondary isolated supplies or as positive and negative supplies See the Other Secondary Isolated Supply Configurations section for more information TERMINALS In the double supply configuration the EVAL ADuM4471EBZ board has terminal blocks on Side 1 the primary power supply input side and Side 2 the secondary power supply output side An 8 0 mm isolation barrier separates Side 1 from Side 2 Table 6 summarizes the
9. ANALOG DEVICES Evaluation Board User Guide UG 492 One Technology Way P O Box 9106 Norwood MA 02062 9106 U S A Tel 781 329 4700 Fax 781 461 3113 www analog com Evaluating the iCoupler ADUM4470 ADUM4471 ADUM4472 ADUM4473 and ADuM4474 Isolated Switching Regulators with Integrated Feedback FEATURES ADuM447x circuits including 5 kV rms isolated dc to dc converters Single supply default 5V input to 5 V output regulated Reconfigurable to 5 V input to 3 3 V output or 3 3 V input to 3 3 V output Double supply 5 V input to 15 V output regulated and 7 5 V output unregulated Reconfigurable to 5 V input to 12 V output regulated and 6 V output unregulated Footprints for Coilcraft Inc and Halo Electronics Inc transformer options Multiple switching frequency options SUPPORTED iCoupler MODELS ADuM4470 ADuM4471 ADuM4472 ADuM4473 ADuM4474 GENERAL DESCRIPTION The EVAL ADuM4471EBZ board can be used for different applications of the ADuM447x iCoupler isolated switching regulators With the ability to be configured as a circuit with either single default or double supply output the board supports a variety of input output configurations and multiple transformer options It is equipped with an ADuM4471 switching regulator ADuM4471ARIZ for voltage isolation but can also be used with ADuM4470ARIZ ADuM4472ARIZ ADuM4473ARIZ or ADuM4474ARIZ The regulator features integrated feedback and a
10. CTION The EVAL ADuM4471EBZ supports multiple transformer options In the double supply configuration the board must be equipped with a Halo Electronics TGRAD 560V8LF T2 or a Coilcraft CR7983 CL T3 1CT 3CT turns ratio transformer see the ADuM4470 ADuM4471 ADuM4472 ADuM4473 ADuM4474 data sheet for details on transformer selection with the ADuM4471 Figure 8 and Figure 10 show the efficiency of the supply using a 1CT 3CT Coilcraft transformer CR7983 CL and a 1CT 3CT Halo Electronics transformer TGRAD 560V8LF respectively at various switching frequencies Figure 9 shows how temperature affects efficiency Rev 0 Page 7 of 12 SWITCHING FREQUENCY OPTIONS The resistance connected from the ADuM4471 oscillator control pin OC to ground sets the double supply switching frequency Figure 3 shows the relationship between this resistance and the converter switching frequency The EVAL ADuM4471EBZ board can be configured with 0 0603 resistors to set one of four preset switching frequencies Table 7 lists the switching frequencies that can be selected by short or open circuiting R12 R13 and R14 The user can select a different switching frequency by removing R12 and R13 and then choosing R18 based on Figure 3 The board is configured for the 500 kHz setting by default Figure 8 and Figure 10 show how the switching frequency affects the efficiency of the supply using a Coilcraft transformer CR7983 CL and a Halo Electronics
11. J8 N A N A Via Side 1 SMA connector to J6 1 01 J7 1 5V 3 3V Vop2 Side 2 5 V secondary isolated supply 2 1 01 Voa Side 2 Logic Output A 3 1 02 Vos Side 2 Logic Output B 4 1 03 Voc Side 2 Logic Output C 5 1 04 Vio Side 2 Logic Input D 6 GND ISO GND Side 2 ground reference TRANSFORMER SELECTION The EVAL ADuM4471EBZ board supports multiple transformer options In the single supply configuration the board is equipped with a Halo Electronics TGRAD 560V8LF T2 or a Coilcraft CR7983 CL T3 1CT 2CT turns ratio transformer the default is the Coilcraft transformer The Halo Electronics footprint is in the middle of the Coilcraft footprint Figure 4 and Figure 6 show the efficiency curves when the board operates in single supply configuration using a Coilcraft transformer CR7983 CL and a Halo Electronics TGRAD 560V8LF transformer respectively SWITCHING FREQUENCY OPTIONS The resistance connected from the ADuM4471 oscillator control pin OC to ground sets the single supply switching frequency Figure 3 shows the relationship between this resistance and the converter switching frequency The EVAL ADuM4471EBZ can be configured with 0 Q 0603 resistors to set one of four preset switching frequencies Table 5 lists the switching frequencies that can be selected by short or open circuiting R12 R13 and R14 The user can select a different switching frequency by removing R12 and R13 and then choosing R18 based on Figure 3 T
12. O 1 8 W 1 Yageo RCO805FR 07150KL R18 Resistor chip SMD 0805 100 kQ 1 8 W 1 Panasonic ECG ERJ 6ENF 1003V R15 Resistor chip SMD 0805 10 5 kO 1 8 W 1 Panasonic ECG ERJ 6ENF1052V R11 Resistor chip SMD 0805 17 4 kO 1 8 W 1 Panasonic ECG ERJ 6ENF1742V R31 R32 Resistor chip SMD 1210 100 Q 1 2 W Panasonic ECG ERJ 14NF50ROV Components Corp TP 104 series Components Corp TP 104 series Sullins Connector Solutions N A 1 Alternatively U1 can be populated with ADUM4470ARIZ ADUM4472ARIZ ADUM4473ARIZ or ADUM4474ARIZ 2 The board can be populated with either a Coilcraft transformer or a Halo Electronics transformer Do not populate both T2 and T3 ESD Caution A ESD electrostatic discharge sensitive device Charged devices and circuit boards can discharge without detection Although this product features patented or proprietary protection y N 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 u
13. 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 ANALOG DEVICES Rev 0 Page 12 of 12 2013 Analog Devices Inc All rights reserved Trademarks and registered trademarks are the property of their respective owners UG11137 0 6 13 0 www analog com
14. g R2 instead of R1 changes the unregulated 7 5 V supply into a 15 V supply Short circuiting R5 instead of R7 connects the transformer center tap to the ground plane instead of the node where L2 and C2 are connected Note that the negative supply is unregulated The positive and negative supplies can be set for 12 V instead of 15 V by short circuiting R10 Although the 15 V output can be regulated the same problems with regulation can occur as described in the Powering Vres from the Unregulated 7 5 V Supply section In addition the 15 V supply can vary over a wide range because it is unregulated and influenced by the changes that occur on the 15 V output Rev 0 Page 9 of 12 EVALUATION BOARD SCHEMATICS AND ARTWORK Pi P2 OUTPUT_2 OUTPUT_1 P4 gi L3 47H SV 1273 8 Dt c1 47uF 2 6 mz TE c2 D L2 DNP 47uF 7 x T2 CR7983 BL 1 8 R3 R4 DNP lt DNP h R5 DNP c3 47uF TGRAD 560V8LF R19 DPN c7 c8 O 1pF 0 1pF ADuM4471 ISO GND Figure 12 Evaluation Board Schematic Page 1 Rev 0 Page 10 of 12 Vout P7 P8 Vout P9 P10 11137 012 Evaluation Board User Guide VDD2 11137 013 Figure 13 Evaluation Board Schematic Page 2 EVALUATION BOARD LAYOUT JI 11137 014 11137 015 Fig
15. he board is configured for the 500 kHz setting by default Figure 4 and Figure 6 show how the switching frequency affects the efficiency of the supply using a Coilcraft transformer CR7983 CL and a Halo Electronics transformer TGRAD 560V8LF respectively Figure 5 shows how the efficiency curves vary over temperature with a 500 kHz switching frequency Table 5 Switching Frequency Selection R12 R13 R14 Roc Switching Frequency fsw 00 Open Open 300kQ 200 kHz Open Open 00 100kQ 500 kHz default 00 Open 00 75 kO 700 kHz 00 00 00 50 kQ 1 MHz Rev 0 Page 5 of 12 1500 1400 1300 1200 1100 1000 900 800 700 600 500 400 300 200 100 0 fsw kHz 0 50 100 150 200 250 300 350 400 450 500 Roc kQ NOTES 1 Roc IS A CALCULATED VALUE BASED ON THE SELECTION OF R12 R13 AND R14 11137 003 Figure 3 Switching Frequency fsw vs Oscillator Resistance Roc OTHER INPUT AND ISOLATED OUTPUT SUPPLY OPTIONS In the single supply configuration the board can be set up to have a 3 3 V secondary isolated supply with a 3 3 V or 5 V primary input supply Short circuiting R10 by soldering a 0 Q 0603 resistor to R9 sets the output supply to 3 3 V The voltage at the feedback node the FB pin of the ADuM4471 should be the desired output voltage divided to approximately 1 25 V Having R10 open circuited sets the secondary isolated supply
16. isclose 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
17. ns eves E Evaluation Board Layout cccessessessessesseessessesseesessesseesseenees 11 Transformer Selections isisisi iiris 5 Bill of Materials ssi 5 scisssccssscssccsatessscsasesescsatessvctssesesesstesevesateienestieess 12 Switching Frequency Options ssssssssssssssssssssssseresssssssssssseereeesss 5 REVISION HISTORY 6 13 Revision 0 Initial Version Rev 0 Page 2 of 12 CONFIGURING THE BOARD FOR SINGLE OR DOUBLE SUPPLY OUTPUT The EVAL ADuM4471EBZ board can be configured for an isolated circuit with either single or double supply output See Table 1 for information about the setup of the feedback divider resistors for the single and double supply configurations For additional applications information about the supported iCoupler devices in these configurations see the ADuM4470 ADuM4471 ADuM4472 ADuM4473 ADuM4474 data sheet Figure 12 and Figure 13 shows the schematics for the EVAL ADuM4471EBZ board in single and double supply configurations Table 1 Feedback Divider Resistors Configuration The single or double supply configuration can be selected by changing the output mode resistor values as described in Table 2 Table 2 Output Mode Resistors Configuration Configuration R5 R7 R8 R9 R19 3 3 V 5V Single Open 00 Open 00 00 12V 15V Double OQ Open 00 Open Open 15 V Double Open 00 Open 00 Open Configuration R6 R10 R11 R15 3 3 V Single 17 4 kQ oQ 14 3 KQ 1
18. re detail in the Input Power Connections and Output Power Connections sections Table 3 Single Supply Terminal Function Descriptions Terminal Label Description P1 5V Side 1 5 V primary input supply P2 GND Side 1 ground reference P7 OUT1 Side 2 5 V secondary isolated supply P8 ISO_GND Side 2 ground reference e Input Power Connections Connect 5 V to P1 labeled 5V or connect 3 3 V to P1 for a 3 3 V primary input supply with a 3 3 V secondary isolated supply Connect the negative end of the supply to P2 labeled GND These are the only off board connections required for the board to function in single supply configuration Connect the 5 V input supplies Vpp and Vppa to the ADuM4471 U1 in single supply configuration Vpn is the ADuM4471 transformer driver supply and Vona is the primary supply voltage see the ADuM4470 ADuM4471 ADuM4472 ADuM4473 ADuM4474 data sheet for additional information Vpn and Vppa are bypassed by a 47 uF ceramic capacitor C3 and a 0 1 uF local bypass capacitor C8 located close to the ADuM4471 R4 R3 C4 and C5 are provided for an optional and unpopulated snubber which can be used to reduce radiated emissions Power is transferred to Side 2 by a regulated push pull converter comprising the ADuM4471 U1 an external transformer T2 or T3 and other components see the ADuM4470 ADuM4471 ADuM4472 ADuM4473 ADuM4474 data sheet for an explanation of this circuit
19. se 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 d
20. tput Configurations Using a 1CT 5CT Coilcraft Transformer CR7983 CL at 500 kHz OTHER SECONDARY ISOLATED SUPPLY CONFIGURATIONS In the double supply configuration the EVAL ADuM4471EBZ board can be configured to have 12 V regulated and 6 V unregu lated secondary isolated supplies by short circuiting R11 with a 0 Q resistor for R10 The regulated supply voltage is set by the fraction of the supply that is fed back to the ADuM4471 via the voltage divider comprising R6 R11 R15 and R10 The voltage at the feedback pin FB is 1 25 V With R10 open circuited the ADuM4471 feedback voltage is approximately 1 25 V if Viso is 15 V When R10 is short circuited the feedback voltage is approximately 1 25 V if Viso is 12 V see the ADuM4470 ADuM4471 ADuM4472 ADuM4473 ADuM4474 data sheet for more information about setting the secondary isolated output supply voltage Figure 11 shows the efficiency curves for both output settings at 500 kHz using a Coilcraft transformer CR7983 CL Rev 0 Page 8 of 12 Positive and Negative Outputs In the double supply configuration the EVAL ADuM4471EBZ board can be set up to have a positive and negative 15 V supply by changing the transformer to a turns ratio 1CT 5CT transformer see the ADuM4470 ADuM4471 ADuM4472 ADuM4473 ADuM4474 data sheet for more information about these transformers Other changes begin with removing the 0 Q resistors from R5 and R8 and inserting them into R7 and R9 Short circuitin
21. transformer TGRAD 560V8LF respectively Table 7 Switching Frequency Selection R12 R13 R14 Roc Switching Frequency fsw oQ Open Open 300kQ 200 kHz Open Open 00 100 kQ 500 kHz default 00 Open 00 75kO 700 kHz oQ oQ 00 50 kQ 1 MHz EFFICIENCY ol 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 LOAD CURRENT mA Figure 8 5 V Input to 15 V Output Efficiency Using a 1CT 3CT Coilcraft Transformer CR7983 CL at Various Switching Frequencies 11137 008 70 60 50 40 30 EIFFICIENCY 0 25 50 75 100 125 150 175 200 LOAD CURRENT mA Figure 9 5 V Input to 15 V Output Efficiency Using a 1CT 3CT Coilcraft Transformer CR7983 CL at 500 kHz and Various Temperatures 11137 009 EFFICIENCY 0 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 LOAD CURRENT mA Figure 10 5 V Input to 15 V Output Efficiency Using a 1CT 3CT Halo Electronics Transformer TGRAD 560V8LF at Various Switching Frequencies 80 11137 010 70 60 50 40 EFFICIENCY 30 5V IN TO 12V OUT 5V IN TO 15V OUT 20 10 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 LOAD CURRENT mA 11137 011 Figure 11 Double Supply Efficiency for Various Ou
22. ure 14 Top Layer Ground Fill Figure 15 Bottom Layer Ground Fill Rev 0 Page 11 of 12 BILL OF MATERIALS Table 8 EVAL ADuM4471EBZ Bill of Materials Qty Reference Designator Description Supplier Part Number U1 Isolated switching regulator with integrated feedback Analog Devices Inc ADUM4471ARIZ D1 to D4 Schottky barrier rectifier 0 5 A 40 V SMD SOD 123 ON Semiconductor MBR0540 T2 Transformer 1CT 2CT turns ratio SMD not populated Halo Electronics TGRAD 560V8LF T3 Transformer 1CT 2CT turns ratio SMD Coilcraft CR7983 CL C1 C2 C3 Capacitor ceramic X7R SMD 1210 47 pF 20 10 V Murata GRM32ER71A476KE15L 0 C4 C5 C9 to C12 C13 to C16 Capacitor ceramic SMD 0603 not populated N A C6 C7 C8 Capacitor ceramic X7R SMD 0603 0 1 uF AVX 0603YC104KAT2A L1 L2 Inductor SMD 2424 47 uH 20 0 17 Q Murata LQH6PPN470M43 L3 L4 Inductor SMD 1212 47 uH 20 1 25 Q Murata LQH3NPN470MMO R1 R7 R9 R11 R14 R19 Resistor chip SMD 0805 0 Q 1 8 W Panasonic ECG ERJ 6GEYOROOV R2 R3 R4 R5 R8 R10 R12 R13 Not populated N A P1 P3 P5 P7 P9 P2 P4 P6 P8 P10 J6 J7 J8 NUN BH BB a a WANN WwW w A gt Test point red Test point black CON PCB terminal 6 x 1 header 0 1 inch spacing CON PCB SMA not populated R6 Resistor chip SMD 0805 14 3 kQ 1 8 W 1 Panasonic ECG ERJ 6ENF1432V R16 Resistor chip SMD 0805 300 kO 1 8 W 1 Yageo RCO805FR 07300KL R17 Resistor chip SMD 0805 150 k

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