ADuM347x Family: PWM Controller and Transformer Drivers with Quad-Channel Isolators

The ADuM347x Family are quad-channel, digital isolators with an integrated PWM controller and transformer driver for an isolated dc-to-dc converter. Based on the Analog Devices, Inc., iCoupler® technology, the dc-to-dc converter provides up to 2 W of regulated, isolated power at 3.3 V to 24 V from a 5.0 V input supply or from a 3.3 V supply. This eliminates the need for a separate, isolated dc-to-dc converter in 2 W isolated designs. The iCoupler chip-scale transformer technology is used to isolate the logic signals, and the integrated transformer driver with isolated secondary side control provides higher efficiency for the isolated dc-to-dc converter. The result is a small form factor, total isolation solution.

Sign-Up for the Digital Isolators Newsletter

Additional Family Features

  • 70% efficiency at guaranteed load of 400 mA at 5.0V output
  • Quad dc-to-25 Mbps (NRZ) signal isolation channels
  • 20-lead SSOP package
  • High temperature operation: 105°C
  • High common-mode transient immunity: >25kV/µs
  • Soft start function at power-up
  • 2500 V rms isolation

Visit Product Pages to Request Samples


Evaluate the ADuM347x Family

The EVAL-ADuM3471EBZ demonstrates two separate applications for the ADuM347x family of quad-channel digital isolators with integrated transformer drivers. 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 transformer options. It is equipped with two ADuM3471 isolators.

Visit the ADuM347x evaluation board page to order.

To learn more about iCoupler technology and products, please visit