GENERAL DESCRIPTION

The ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474 devices1 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.

FEATURES

Isolated PWM controller

Integrated transformer driver

Regulated adjustable output: 3.3 V to 24 V

2 W output power

70 efficiency at guaranteed load of 400 mA at 5.0 V output

Quad dc-to-25 Mbps (NRZ) signal isolation channels

20-lead SSOP package

High temperature operation: 105°C maximum

High common-mode transient immunity: >25 kV/μs

200 kHz to 1 MHz adjustable oscillator frequency

Soft start function at power-up

Pulse-by-pulse overcurrent protection

Thermal shutdown

Safety and regulatory approvals

UL recognition: 2500 V rms for 1 minute per UL 1577 CSA Component Acceptance Notice #5A VDE certificate of conformity

DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 VIORM = 560 V peak

Qualified for automotive applications

APPLICATIONS

RS-232/RS-422/RS-485 transceivers

Industrial field bus isolation

Power supply start-up bias and gate drives

Isolated sensor interfaces

Process controls

Automotive