ایزولاتور ایزولاتور دیجیتال

Product Attributes

Introduction

The ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474 devices are quad-channel digital isolators that integrate a PWM controller and transformer driver for driving isolated DC/DC converters. The DC/DC converter provides a regulated, isolated power supply of 2 W at 3.3 V to 24 V, with an input supply voltage of 5.0 V or 3.3 V. This eliminates the need for a separate isolated DC/DC converter in 2 W isolation designs. iCoupler chip-scale transformer technology is used for logic signal isolation; the integrated transformer driver with isolated secondary-side control improves the efficiency of the isolated DC/DC converter, thereby delivering a compact, fully isolated solution.

Features

• Isolated PWM controller
• Integrated transformer driver
• Adjustable regulated output: 3.3 V to 24 V
• 2 W output power
• Efficiency: 70% (at 400 mA guaranteed load, 5.0 V output)
• Four DC - 25 Mbps (NRZ) signal isolation channels
• 20-pin SSOP package
• Operating temperature up to 105°C
• High common-mode transient immunity: >25 kV/μs
• Adjustable oscillator frequency: 200 kHz to 1 MHz
• Soft-start at power-up
• Pulse-by-pulse overcurrent protection
• Thermal shutdown
• 2500 V rms isolation

Applications

• RS-232/RS-422/RS-485 transceivers
• Industrial fieldbus isolation
• Power supply startup biasing and gate driving
• Isolated sensor interfaces
• Process control