Analog Devices EVAL-ADuM3070EBZ User Manual
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Analog Devices EVAL-ADuM3070EBZ User Manual

Analog Devices EVAL-ADuM3070EBZ User Manual

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FEATURES

2 independent
ADuM3070
isolated dc-to-dc converters
Single supply
5 V in to 5 V out (regulated)
Reconfigurable to 5 V in to 3.3 V out or 3.3 V in
to 3.3 V out
Double supply
5 V in to 15 V 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
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
ADuM3070
iCoupler
With Integrated Feedback Evaluation Board
circuits including 2.5 kV rms
ADUM3070
Figure 1. Double Supply (Top) and Single Supply (Bottom) Configurations

Evaluation Board User Guide

Isolated Switch Regulator

SUPPORTED iCoupler MODELS

ADuM3070

GENERAL DESCRIPTION

The
EVAL-ADuM3070EBZ
applications for the
integrated feedback. It has two independent power supply
circuits: a double supply and a single supply. The switching
frequency can be set from 200 kHz to 1000 kHz. The board
supports a variety of I/O configurations and multiple trans-
former options. It is equipped with two
EVALUATION BOARD
Rev. 0 | Page 1 of 12
demonstrates two separate
ADuM3070
isolated switch regulator with
ADuM3070
UG-402
isolators.

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Summary of Contents for Analog Devices EVAL-ADuM3070EBZ

  • Page 1: Features

    ADuM3070 circuits including 2.5 kV rms ADuM3070 isolated dc-to-dc converters GENERAL DESCRIPTION Single supply EVAL-ADuM3070EBZ demonstrates two separate 5 V in to 5 V out (regulated) applications for the ADuM3070 isolated switch regulator with Reconfigurable to 5 V in to 3.3 V out or 3.3 V in integrated feedback.

  • Page 2: Table Of Contents

    UG-402 Evaluation Board User Guide TABLE OF CONTENTS     Features ....................1 Schematic..................5     Double Supply ..................6 Supported iCoupler Models ............1     General Description ................. 1 Terminals ..................6     ADuM3070 Evaluation Board ............1 Transformer Selection ..............7  ...

  • Page 3: Single Supply

    ADuM3070. TRANSFORMER SELECTION EVAL-ADuM3070EBZ supports multiple transformer options. The single supply is equipped with a Halo TGSAD- 260V6LF (T1) or a Coilcraft JA4631-BL (T2) 1:2 turns ratio transformer.

  • Page 4: Other Input And Isolated Output Supply Options

    UG-402 Evaluation Board User Guide The user can select a different switching frequency by removing R10 and R11 and then choosing R1 based on Figure 4. The board is configured for the 500 kHz setting by default. Figure 5 and Figure 7 show how the switching frequency affects the supply’s efficiency with either transformer installed.

  • Page 5: Schematic

    Evaluation Board User Guide UG-402 5V IN TO 5V OUT 5V IN TO 3.3V OUT 3.3V IN TO 3.3V OUT LOAD CURRENT (mA) Figure 8. Single Supply Efficiency for Various Output Configurations with 1:2 Coilcraft Transformer at 500 kHz SCHEMATIC Figure 9.

  • Page 6: Double Supply

    UG-402 Evaluation Board User Guide DOUBLE SUPPLY The second power supply implemented with the ADuM3070 and V are bypassed by a 47 µF ceramic capacitor (C7) and a this evaluation board is a double supply. This circuit, which is 0.1 µF local bypass capacitor (C8) located close to the ADuM3070. shown in Figure 10, is located on the top half of the board.

  • Page 7: Transformer Selection

    Evaluation Board User Guide UG-402 TRANSFORMER SELECTION EVAL-ADuM3070EBZ supports multiple transformer options. The double supply is equipped with a Halo TGSAD- 290V6LF (T3) or a Coilcraft JA4650-BL (T4) 1:3 turns ratio transformer. The Coilcraft footprint is directly to the left of the...

  • Page 8: Other Secondary Isolated Supply Configurations

    UG-402 Evaluation Board User Guide OTHER SECONDARY ISOLATED SUPPLY become the −15 V supply. Short-circuiting R21 instead of R22 connects the transformer center tap to the ground plane instead CONFIGURATIONS of the node where L3, C12, and C13 are connected. Figure 16 The double supply can be configured for 12 V regulated and 6 V shows which resistors should be short-circuited and open- unregulated secondary isolated supplies by short-circuiting R17...

  • Page 9: Evaluation Board Layout

    Evaluation Board User Guide UG-402 EVALUATION BOARD LAYOUT Figure 18. Top Layer: Power Fill Figure 20. Layer 3: Power Plane Figure 19. Layer 2: Ground Plane Figure 21. Bottom Layer: Ground Fill Rev. 0 | Page 9 of 12...

  • Page 10: Ordering Information

    Components Corp./TP-104-01-00 P2, P4, P6, P8, P10 TP-104 series test point, red Components Corp./TP-104-01-02 U1, U2 ADuM3070 Analog Devices, Inc. D1 to D6 Schottky barrier rectifier, 0.5 A, 40 V, SMD, SOD-123 ON Semi/MBR0540 Transformer, 1:2 turns ratio, SMD Halo/TGSAD-260V6LF...
  • Page 11 Evaluation Board User Guide UG-402 NOTES Rev. 0 | Page 11 of 12...
  • Page 12 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.

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