Dual-Channel Isolator with Integrated DC-to-DC Converter

The ADuM6221A is a dual-channel digital isolators with an isoPower ®, integrated, isolated DC-to-DC converter. Based on the Analog Devices, Inc., iCoupler® technology, the DC-to-DC converter provides regulated, isolated power that meets CISPR 32/EN 55032 Class B limits at full load on a 2-layer printed circuit board (PCB) with ferrites. Popular voltage combinations and the associated output current levels are listed in Table 1.

The ADuM6221A eliminates the need for a separate, isolated DC-to-DC converter in 500 mW, isolated designs. The iCoupler chip scale transformer technology is used for isolated logic signals and for the magnetic components of the DC-to-DC converter. The result is a small form factor and total isolation solution.

The ADuM6221A isolators provide two independent isolation channels (for more details, see the Pin Configurations and Function Descriptions section).

Applications

* RS-232 transceivers

* Power supply start-up bias and gate drives

* Isolated sensor interfaces

* Automotive on-board charger (OBC) and DC-to-DC

* Industrial programmable logic controllers (PLCs)

* isoPower integrated, isolated DC-to-DC converter* 100 mA output supply* Meets CISPR 32/EN55032 Class B emission limits up to 5 Mbps at full load on a 2-layer PCB* Dual DC to 100 Mbps signal isolation channels* 28-lead, fine pitch, SOIC with 8.3 mm minimum creepage* High temperature operation: 125°C maximum* High common-mode transient immunity: 100 kV/µs