ADI ADuM347x iCoupler四路数字绝缘电源解决方案

ADI公司的ADuM347x是集成了PWM控制器和变压器驱动器的iCoupler四路数字绝缘器系列(ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474),适合在隔离的DC/DC转换器应用,可调整稳压输出从3.3V到24V,输出功率2W,5.0V/400mA的效率70%,绝缘电压2500Vrms,软起动,逐个周期的过流保护.热关断,主要用在RS-232/RS-422/RS-485收发器,工业现场总线绝缘,电源起动偏压和栅极驱动,处理器控制以及绝缘传感器接口等.本文介绍了ADuM347x系列主要特性, 方框图,但电源和双电源应用电路,以及评估板EVAL-ADuM3471EBZ主要特性,单电源和双电源电路图,材料清单,
The ADuM347x (ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474)devices 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.
The ADuM347x isolators provide four independent isolation channels in a variety of channel configurations and data rates. (The x in ADuM347x throughout this data sheet stands for the ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474.)
ADuM347x主要特性:
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℃
High common-mode transient immunity: >25 kV/μs
200 kHz to 1 MHz adjustable oscillator frequency
Soft start function at power-up
Pulse-by-puls...