Analog Devices EVAL-ADuM3070EBZ Скачать руководство пользователя страница 9 | Manualshive

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Evaluation Board User Guide

UG-402

Rev. 0 | Page 9 of 12

EVALUATION BOARD LAYOUT

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Figure 18. Top Layer: Power Fill

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Figure 19. Layer 2: Ground Plane

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Figure 20. Layer 3: Power Plane

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Figure 21. Bottom Layer: Ground Fill

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Содержание EVAL-ADuM3070EBZ

Страница 1: ...out regulated and 7 5 V out unregulated Reconfigurable to 5 V in to 12 V out regulated and 6 V out unregulated Footprints for Coilcraft and Halo transformer options Multiple switching frequency options SUPPORTED iCoupler MODELS ADuM3070 GENERAL DESCRIPTION The EVAL ADuM3070EBZ demonstrates two separate applications for the ADuM3070 isolated switch regulator with integrated feedback It has two inde...

Страница 2: ...y 3 Terminals 3 Transformer Selection 3 Switching Frequency Options 3 Other Input and Isolated Output Supply Options 4 Schematic 5 Double Supply 6 Terminals 6 Transformer Selection 7 Switching Frequency Options 7 Other Secondary Isolated Supply Configurations 8 Schematic 8 Evaluation Board Layout 9 Ordering Information 10 Bill of Materials 10 REVISION HISTORY 5 12 Revision 0 Initial Version ...

Страница 3: ... regulated push pull converter comprising the ADuM3070 U1 an external transformer T1 or T2 and other components see the ADuM3070 data sheet for an explanation of this circuit functionality Output Power Connections An output load can be connected to P3 labeled 5V 3 3V on the silkscreen and not labeled on the schematic which is the iso lated regulated 5 V output supply Connect the return of the load...

Страница 4: ...e output supply for 3 3 V The voltage at the feedback node the FB pin of the ADuM3070 should be the desired output voltage divided to approximately 1 25 V Having R9 open circuited sets the secondary isolated supply to 5 V and having it short circuited sets the supply to 3 3 V See the ADuM3070 data sheet for more details on setting the secondary isolated output supply voltage Figure 8 shows how the...

Страница 5: ... 450 400 350 300 250 200 150 100 50 EFFICIENCY LOAD CURRENT mA 5V IN TO 5V OUT 5V IN TO 3 3V OUT 3 3V IN TO 3 3V OUT 10653 008 Figure 8 Single Supply Efficiency for Various Output Configurations with 1 2 Coilcraft Transformer at 500 kHz SCHEMATIC 10653 009 Figure 9 Single Supply Schematic ...

Страница 6: ...utput Power Connections Output loads can be connected to P7 and P9 labeled VISO1 and VISO2 respectively in the schematic and 7 5V 6V and 15 12V respectively on the silkscreen which are the isolated unregulated 7 5 V and regulated 15 V output supplies Connect the return of the load to P8 and P10 which are labeled GND ISO on the silkscreen and GND4 in the schematic Side 2 is powered by the secondary...

Страница 7: ...d on Figure 4 The board is config ured for the 500 kHz setting by default Figure 12 and Figure 14 show how the switching frequency affects the efficiency with either transformer installed Figure 13 shows how temperature affects efficiency Table 4 Switching Frequency Selection R26 R27 ROC Switching Frequency Open Open 300 kΩ 200 kHz 0 Ω Open 100 kΩ 500 kHz Open 0 Ω 75 kΩ 700 kHz 0 Ω 0 Ω 50 kΩ 1 MHz...

Страница 8: ...o 1CT 5CT transformer see the ADuM3070 data sheet for more information on these transformers Other changes begin with removing the 0 Ω resistors from R24 and R22 and inserting them into R23 and R21 Short circuiting R23 instead of R24 makes the 7 5 V 6 V P7 become the 15 V supply Short circuiting R21 instead of R22 connects the transformer center tap to the ground plane instead of the node where L3...

Страница 9: ... Guide UG 402 Rev 0 Page 9 of 12 EVALUATION BOARD LAYOUT 10653 018 Figure 18 Top Layer Power Fill 10653 019 Figure 19 Layer 2 Ground Plane 10653 020 Figure 20 Layer 3 Power Plane 10653 021 Figure 21 Bottom Layer Ground Fill ...

Страница 10: ...ata GRM32ER71A476KE15L 4 C10 to C13 Capacitor ceramic X7R SMD 1210 22 µF 20 16 V Murata GRM32ER71C226KE18L 3 L1 to L3 Inductor SMD 1212 47 µH 20 1 25 Ω Murata LQH3NPN470MM0 2 R1 R28 RES chip SMD 0805 300 kΩ 1 8 W 1 Yageo RC0805FR 07300KL 2 R2 R29 RES chip SMD 0805 150 kΩ 1 8 W 1 Yageo RC0805FR 07150KL 2 R3 R30 RES chip SMD 0805 100 kΩ 1 8 W 1 Panasonic ECG ERJ 6ENF1003V 2 R6 R32 RES chip SMD 0805 ...

Страница 11: ...Evaluation Board User Guide UG 402 Rev 0 Page 11 of 12 NOTES ...

Страница 12: ...rty 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 i...

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