Isolated Switch Regulator with Quad-Channel Isolators (2/2 Channel Directionality)
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 jpower 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).
- Power supply startup bias and gate drives
- Isolated sensor interfaces
- Process controls
- RS-232/RS-422/RS-485 transceivers
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This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
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.
First Digital Isolators to Achieve 8.3mm Creepage Packaging
ADI has released its first packaging technology for digital isolators that achieve a minimum of 8mm creepage distance to
Safety and Regulatory Compliance Information
The iCoupler® family of digital isolation products have been tested and approved by various regulatory agencies,...