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ADUM3471ARSZ Datasheet(PDF) 1 Page - Analog Devices |
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ADUM3471ARSZ Datasheet(HTML) 1 Page - Analog Devices |
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1 / 36 page  PWM Controller and Transformer Driver with Quad-Channel Isolators Data Sheet ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474 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 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. 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 (see the Ordering Guide). FUNCTIONAL BLOCK DIAGRAMS ADuM3470/ADuM3471/ ADuM3472/ADuM3473/ ADuM3474 PRIMARY CONVERTER DRIVER PRIMARY DATA I/O 4CH SECONDARY DATA I/O 4CH SECONDARY CONTROLLER CH A FB T1 CH B CH C CH D VDD2 OC FB VREG VIA/VOA VDD1 VDDA X2 X1 VIB/VOB VIC/VOC VID/VOD VIA/VOA VIB/VOB VIC/VOC VID/VOD GND1 GND2 REG RECT 5V VISO Figure 1. Functional Block Diagram ADuM3470 ADuM3471 ADuM3472 ADuM3473 ADuM3474 Figure 2. Block Diagrams of I/O Channels 1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329. Other patents pending. Rev. B Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2010–2014 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com |
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