ADUM4472

PRODUCTION

Isolated Switch Regulator with Quad-Channel Isolators (2/2 Channel Directionality)

Data Sheet (Rev. C) Product Selection Table
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Overview

  • Isolated PWM feedback with built-in compensation
  • Primary side transformer driver for up to 2.5 W output power with 5 V input voltage
  • Regulated adjustable output: 3.3 V to 24 V
  • Up to 80% efficiency
  • Quad DC-to-25 Mbps (NRZ) signal isolation channels
  • 200 kHz to 1 MHz adjustable oscillator
  • Soft start function at power-up
  • Pulse-by-pulse overcurrent protection
  • Thermal shutdown
  • 5000 V rms isolation
  • High common-mode transient immunity: >25 kV/μs
  • 20-lead SOIC package with 8.3 mm creepage
  • High temperature operation: 105°C
  • Safety and regulatory approvals
    • UL 1577
      • VISO = 5000 V rms for 1 minute
    • IEC / EN / CSA 62368-1
    • IEC / CSA 60601-1
    • IEC / CSA 61010-1
    • DIN EN IEC 60747-17 (VDE 0884-17)
      • VIORM = 645 V peak

The ADuM4470 / ADuM4471 / ADuM4472 / ADuM4473 / ADuM4474 are quad-channel, digital isolations with a regulated DC/DC isolated power supply controller with an internal MOSFET driver. The DC/DC controller has an internal isolated PWM feedback from the secondary side based on the iCoupler® chip scale transformer technology and complete loop compensation. This eliminates the need to use an optocoupler for feedback and compensates the loop for stability.

The ADuM447x isolator provides a more stable output voltage and higher efficiency compared to unregulated isolated DC/DC power supplies. The fully integrated feedback and loop compensation in a wide-body SOIC package provide a smaller form factor and 8.3 mm creepage distance solution. The regulated feedback provides a relatively flat efficiency curve over the full output power range. The ADuM3070 enables a DC/DC converter with a 3.3 V to 24 V isolated output voltage range from either a 5.0 V or a 3.3 V input voltage, with an output power of up to 2.5 W.

The ADuM447x isolators provide four independent isolation channels in a variety of channel configurations and data rates. (The x in ADuM447x throughout this data sheet stands for the ADuM4470 / ADuM4471 / ADuM4472 / ADuM4473 / ADuM4474).

APPLICATIONS

  • Power supply startup bias and gate drives
  • Isolated sensor interfaces
  • Process controls
  • RS-232/RS-422/RS-485 transceivers
ADUM4472
Isolated Switch Regulator with Quad-Channel Isolators (2/2 Channel Directionality)
ADuM4470/ADuM4471/ADuM4472/ADuM4473/ADuM4474 Functional Block Diagram ADuM4472 Pin Configuration
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Documentation

Data Sheet 1

User Guide 1

Informational 1

Safety and Regulatory Compliance 1

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Evaluation Kits

eval board
schematic 1
EVAL-ADUM4471

ADUM4471 Evaluation Board

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Product Details

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.

The 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-ADUM4471
ADUM4471 Evaluation Board

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7 Years Ago
ADuM4472 Primary side: 5V power and 3V3 digital, Secondary side: all 5V
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