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 GENERAL DESCRIPTION ADuM447x circuits, including 5 kV rms isolated dc-to-dc converters Single supply (default) 5 V 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 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 switching frequency that can be set from 200 kHz to 1000 kHz. SUPPORTED iCoupler MODELS ADuM4470 ADuM4471 ADuM4472 ADuM4473 ADuM4474 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. 11137-001 EVAL-ADUM4471EBZ BOARD PHOTOGRAPH Figure 1. Single-Supply and Double-Supply Configurations See the last page for an important warning and disclaimers. Rev. 0 | Page 1 of 12 UG-492 Evaluation Board User Guide TABLE OF CONTENTS Features .............................................................................................. 1 Other Input and Isolated Output Supply Options ....................6 Supported iCoupler Models ............................................................ 1 Double Supply ....................................................................................7 General Description ......................................................................... 1 Terminals ........................................................................................7 EVAL-ADuM4471EBZ Board Photograph .................................... 1 Transformer Selection ..................................................................7 Revision History ............................................................................... 2 Switching Frequency Options......................................................8 Configuring the Board for Single- or Double-Supply Output ... 3 Other Secondary Isolated Supply Configurations ....................8 Single Supply ..................................................................................... 4 Evaluation Board Schematics and Artwork ................................ 10 Terminals ....................................................................................... 4 Evaluation Board Layout ........................................................... 11 Transformer Selection .................................................................. 5 Bill of Materials ............................................................................... 12 Switching Frequency Options ..................................................... 5 REVISION HISTORY 6/13—Revision 0: Initial Version Rev. 0 | Page 2 of 12 Evaluation Board User Guide UG-492 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. The single- or double-supply configuration can be selected by changing the output mode resistor values as described in Table 2. Table 1. Feedback Divider Resistors Configuration 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. Configuration 3.3 V Single 5 V Single 12 V Double 15 V Double R6 17.4 kΩ 17.4 kΩ 90.9 kΩ 90.9 kΩ R10 0Ω Open 0Ω Open R11 14.3 kΩ 14.3 kΩ 24.9 kΩ 24.9 kΩ R15 10.5 kΩ 10.5 kΩ 10.5 kΩ 10.5 kΩ Table 2. Output Mode Resistors Configuration Configuration 3.3 V/5 V Single 12 V/15 V Double ±15 V Double Rev. 0 | Page 3 of 12 R5 Open 0Ω Open R7 0Ω Open 0Ω R8 Open 0Ω Open R9 0Ω Open 0Ω R19 0Ω Open Open UG-492 Evaluation Board User Guide 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 more detail in the Input Power Connections and Output Power Connections sections. 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 (VDD1 and VDDA) to the ADuM4471 (U1) in single-supply configuration. VDD1 is the ADuM4471 transformer driver supply, and VDDA is the primary supply voltage (see the ADuM4470/ADuM4471/ADuM4472/ ADuM4473/ADuM4474 data sheet for additional information). VDD1 and VDDA are bypassed by a 47 µF ceramic capacitor (C3) and a 0.1 µF 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 functionality). Table 3. Single-Supply Terminal Function Descriptions Label 5V GND OUT1 ISO_GND Description Side 1—5 V primary input supply Side 1—ground reference Side 2—5 V secondary isolated supply Side 2—ground reference 11137-002 Terminal P1 P2 P7 P8 Figure 2. Single-Supply and Double-Supply Board Terminals Rev. 0 | Page 4 of 12 Evaluation Board User Guide UG-492 Output Power Connections Table 4. Single-Supply Terminal 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. Terminal J6 Pin 1 Mnemonic +5V IN J8 2 3 4 5 6 N/A I/O1 I/O2 I/O3 I/O4 GND N/A J7 1 +5V/3.3V 2 3 4 5 6 I/O1 I/O2 I/O3 I/O4 GND ISO 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 configurations. 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/O4 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 Ω signal source. R30 must be shorted with a 0 Ω 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 Ω, 0805 resistors to R27 and R28 ties VIA, VIB, and VIC together. Note that R29 must not be populated if an external signal source is applied to I/O3. This can cause permanent damage to the ADuM4471 because an output pin is being driven. R29 can be used to connect VIC to VOD so that VOD 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. ADuM4471 Connection Description Side 1—5 V primary input supply VIA Side 1—Logic Input A VIB Side 1—Logic Input B VIC Side 1—Logic Input C VOD Side 1—Logic Output D GND1 Side 1—ground reference VIA Side 1—SMA connector to J6, I/O1 VDD2 Side 2—5 V secondary isolated supply VOA Side 2—Logic Output A VOB Side 2—Logic Output B VOC Side 2—Logic Output C VID Side 2—Logic Input D GND2 Side 2—ground reference Pin VDDA 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 Ω, 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. The 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 0Ω Open 0Ω 0Ω Rev. 0 | Page 5 of 12 R13 Open Open Open 0Ω R14 Open 0Ω 0Ω 0Ω ROC 300 kΩ 100 kΩ 75 kΩ 50 kΩ Switching Frequency (fSW) 200 kHz 500 kHz (default) 700 kHz 1 MHz UG-492 Evaluation Board User Guide 1500 90 1400 80 1300 1200 70 1100 EFFICIENCY (%) 1000 fSW (kHz) 900 800 700 600 500 60 50 40 30 400 –40°C +25°C +105°C 20 300 200 10 0 0 50 100 150 200 250 300 350 400 450 500 0 50 100 ROC (kΩ) 150 200 250 300 350 400 LOAD CURRENT (mA) 11137-003 NOTES 1. ROC IS A CALCULATED VALUE BASED ON THE SELECTION OF R12, R13, AND R14. 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 Figure 3. Switching Frequency (fSW) vs. Oscillator Resistance (ROC) OTHER INPUT AND ISOLATED OUTPUT SUPPLY OPTIONS 80 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 Ω, 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 to 5 V, and having R10 shortcircuited 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. EFFICIENCY (%) 70 60 50 40 1MHz 700kHz 500kHz 200kHz 30 20 10 0 0 50 100 150 200 250 300 350 400 LOAD CURRENT (mA) 11137-006 0 11137-005 100 Figure 6. 5 V Input to 5 V Output Efficiency Using a 1CT:2CT Halo Electronics Transformer (TGRAD-560V8LF) at Various Switching Frequencies 80 90 70 80 60 EFFICIENCY (%) 60 50 40 1MHz 700kHz 500kHz 200kHz 30 50 40 30 5V IN TO 5V OUT 5V IN TO 3.3V OUT 3.3V IN TO 3.3V OUT 20 20 10 10 0 50 100 150 200 250 LOAD CURRENT (mA) 300 350 400 11137-004 0 0 0 50 100 150 200 250 LOAD CURRENT (mA) Figure 4. 5 V Input to 5 V Output Efficiency Using a 1CT:2CT Coilcraft Transformer (CR7983-CL) at Various Switching Frequencies Rev. 0 | Page 6 of 12 300 350 400 11137-007 EFFICIENCY (%) 70 Figure 7. Single-Supply Efficiency for Various Output Configurations Using a 1CT:2CT Coilcraft Transformer (CR7983-CL) at 500 kHz Evaluation Board User Guide UG-492 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 capable 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 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 P1 P2 P9 Label 5V GND OUT2 P10 P7 ISO_GND OUT1 P8 ISO_GND Description Side 1—5 V primary input supply Side 1—ground reference Side 2—7.5 V secondary isolated supply (unregulated) Side 2—ground reference Side 2—15 V secondary isolated supply (regulated) 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 (VDD1 and VDDA) to the ADuM4471 (U1) in double-supply configuration. VDD1 is the ADuM4471 transformer driver supply, and VDDA is the primary supply voltage (see the ADuM4470/ADuM4471/ADuM4472/ ADuM4473/ADuM4474 data sheet for additional information). VDD1 and VDDA are bypassed by a 47 µF ceramic capacitor (C3) and a 0.1 µF 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 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 VREG pin is 15 V, and the VDD2 pin is 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 VREG. Powering VREG from the Unregulated 7.5 V Supply VREG 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 VREG ensures that the secondary side of the ADuM4471 powers up under light load conditions. Move the 0 Ω, 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 SELECTION 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 (CR7983CL) and a 1CT:3CT Halo Electronics transformer (TGRAD560V8LF), respectively, at various switching frequencies. Figure 9 shows how temperature affects efficiency. Rev. 0 | Page 7 of 12 UG-492 Evaluation Board User Guide SWITCHING FREQUENCY OPTIONS 90 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 EVALADuM4471EBZ board can be configured with 0 Ω, 0603 resistors to set one of four preset switching frequencies. Table 7 lists the switching frequencies that can be selected by short- or opencircuiting R12, R13, and R14. 80 ROC 300 kΩ 100 kΩ 75 kΩ 50 kΩ EFFICIENCY (%) 0 EFFICIENCY (%) 1MHz 700kHz 500kHz 200kHz 0 20 30 40 50 60 70 80 90 100 110 120 130 140 Figure 10. 5 V Input to 15 V Output Efficiency Using a 1CT:3CT Halo Electronics Transformer (TGRAD-560V8LF) at Various Switching Frequencies 80 70 Switching Frequency (fSW) 200 kHz 500 kHz (default) 700 kHz 1 MHz 60 50 40 30 70 20 60 10 50 0 5V IN TO 12V OUT 5V IN TO 15V OUT 0 5 10 15 20 25 30 35 40 45 50 55 60 LOAD CURRENT (mA) 40 1MHz 700kHz 500kHz 200kHz 20 20 30 40 50 60 70 80 90 100 110 120 130 140 LOAD CURRENT (mA) 11137-008 10 Figure 8. 5 V Input to 15 V Output Efficiency Using a 1CT:3CT Coilcraft Transformer (CR7983-CL) at Various Switching Frequencies 70 60 50 40 30 –40°C +25°C +105°C 20 In the double-supply configuration, the EVAL-ADuM4471EBZ board can be configured to have 12 V regulated and 6 V unregulated secondary isolated supplies by short-circuiting R11 with a 0 Ω 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). 0 25 50 75 100 125 LOAD CURRENT (mA) 150 175 200 11137-009 10 0 70 OTHER SECONDARY ISOLATED SUPPLY CONFIGURATIONS 10 0 65 Figure 11. Double-Supply Efficiency for Various Output Configurations Using a 1CT:5CT Coilcraft Transformer (CR7983-CL) at 500 kHz 30 0 10 LOAD CURRENT (mA) 80 EIFFICIENCY (%) 30 11137-011 R14 Open 0Ω 0Ω 0Ω 40 10 EFFICIENCY (%) R13 Open Open Open 0Ω 50 20 Table 7. Switching Frequency Selection R12 0Ω Open 0Ω 0Ω 60 11137-010 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 transformer (TGRAD-560V8LF), respectively. 70 Figure 9. 5 V Input to 15 V Output Efficiency Using a 1CT:3CT Coilcraft Transformer (CR7983-CL) at 500 kHz and Various Temperatures Rev. 0 | Page 8 of 12 Evaluation Board User Guide UG-492 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 Ω resistors from R5 and R8 and inserting them into R7 and R9. Short-circuiting 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 VREG 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 UG-492 Evaluation Board User Guide EVALUATION BOARD SCHEMATICS AND ARTWORK P3 OUTPUT_2 OUTPUT_1 P4 R 10Ω L3 47µH 5V 12 T3 8 VOUT1 L1 DNP D1 C1 5 6 1 2 47µF D2 C2 L2 DNP 7 11 1 8 R4 DNP C4 C5 DNP DNP 2 3 7 6 4 5 R6 17.4kΩ R70 R8 DNP P6 TGRAD-560V8LF R 90Ω R10 DNP U1 P1 DA_1 DB_1 DC_1 DD_1 P2 C7 C8 0.1µF 0.1µF R2 DNP D4 R5 DNP P5 C3 47µF 47µF L4 47µH DA_1 DB_1 DC_1 DD_4 1 2 3 4 5 6 7 8 9 10 X1 GND1_1 NC X2 VIA VIB VIC VID VDDA GND1_2 VREG GND2_1 VDD2 FB VOA VOB VOC VOD OC GND2_2 20 19 18 17 16 15 14 13 12 11 ADuM4471 R11 14.3kΩ P7 VDD2 C6 0.1µF DA_2 DB_2 DC_2 DD_2 R19 DPN P8 DA_2 DB_2 DC_2 DD_2 VOUT2 R12 DNP R13 DNP R14 0Ω R16 300kΩ R17 150kΩ R18 100kΩ R15 10.5k P9 P10 ISO GND Figure 12. Evaluation Board Schematic, Page 1 Rev. 0 | Page 10 of 12 11137-012 R3 DNP T2 CR7983-BL D3 Evaluation Board User Guide UG-492 R30 J8 DNP R31 100Ω R32 100Ω SMA R27 DNP R28 DNP R29 DNP VDD2 5V J6 J7 1 1 2 DA_1 3 DB_1 4 DC_1 5 DD_1 DA_1 DB_1 DC_1 DD_1 DA_2 DB_2 DC_2 2 DB_2 3 DC_2 4 DD_2 DD_2 6 5 6 C9 C10 C11 C12 C13 C14 C15 C16 DNP DNP DNP DNP DNP DNP DNP DNP CON6x1 11137-013 CON6x1 DA_2 Figure 13. Evaluation Board Schematic, Page 2 Figure 14. Top Layer: Ground Fill 11137-015 11137-014 EVALUATION BOARD LAYOUT Figure 15. Bottom Layer: Ground Fill Rev. 0 | Page 11 of 12 UG-492 Evaluation Board User Guide BILL OF MATERIALS Table 8. EVAL-ADuM4471EBZ Bill of Materials Qty 1 4 1 1 3 10 3 2 2 6 8 1 1 1 1 1 1 2 5 5 2 1 1 2 Reference Designator U1 1 D1 to D4 T2 2 T32 C1, C2, C3 C4, C5, C9 to C12, C13 to C16 C6, C7, C8 L1, L2 L3, L4 R1, R7, R9, R11, R14, R19 R2, R3, R4, R5, R8, R10, R12, R13 R6 R16 R17 R18 R15 R11 R31, R32 P1, P3, P5, P7, P9 P2, P4, P6, P8, P10 J6, J7 J8 Description Isolated switching regulator with integrated feedback Schottky barrier rectifier, 0.5 A, 40 V, SMD, SOD-123 Transformer, 1CT:2CT turns ratio, SMD (not populated) Transformer, 1CT:2CT turns ratio, SMD Capacitor, ceramic, X7R, SMD, 1210, 47 µF, 20%, 10 V Capacitor, ceramic, SMD, 0603 (not populated) Capacitor, ceramic, X7R, SMD, 0603, 0.1 µF Inductor, SMD, 2424, 47 µH, 20%, 0.17 Ω Inductor, SMD, 1212, 47 µH, 20%, 1.25 Ω Resistor chip, SMD, 0805, 0 Ω, 1/8 W Not populated Resistor chip, SMD, 0805, 14.3 kΩ, 1/8 W, 1% Resistor chip, SMD, 0805, 300 kΩ, 1/8 W, 1% Resistor chip, SMD, 0805, 150 kΩ, 1/8 W, 1% Resistor chip, SMD, 0805, 100 kΩ, 1/8 W, 1% Resistor chip, SMD, 0805, 10.5 kΩ, 1/8 W, 1% Resistor chip, SMD, 0805, 17.4 kΩ, 1/8 W, 1% Resistor chip, SMD 1210, 100 Ω, 1/2 W Test point, red Test point, black CON-PCB terminal, 6 × 1 header, 0.1 inch spacing CON-PCB, SMA (not populated) Supplier/Part Number Analog Devices, Inc./ADuM4471ARIZ ON Semiconductor/MBR0540 Halo Electronics/TGRAD-560V8LF Coilcraft/CR7983-CL Murata/GRM32ER71A476KE15L N/A AVX/0603YC104KAT2A Murata/LQH6PPN470M43 Murata/LQH3NPN470MM0 Panasonic/ECG/ERJ-6GEY0R00V N/A Panasonic/ECG/ERJ-6ENF1432V Yageo/RC0805FR-07300KL Yageo/RC0805FR-07150KL Panasonic/ECG/ERJ-6ENF1003V Panasonic/ECG/ERJ-6ENF1052V Panasonic/ECG/ERJ-6ENF1742V Panasonic/ECG/ERJ-14NF50R0V Components Corp./TP-104 series Components Corp./TP-104 series Sullins Connector Solutions N/A Alternatively, U1 can be populated with ADuM4470ARIZ, ADuM4472ARIZ, ADuM4473ARIZ, or ADuM4474ARIZ. The board can be populated with either a Coilcraft transformer or a Halo Electronics transformer. Do not populate both T2 and T3. 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. 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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. ©2013 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. UG11137-0-6/13(0) Rev. 0 | Page 12 of 12