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ADuM3470 Datasheet دیتاشیت PDF دانلود

دیتاشیت - Analog Devices - PWM Controller and Transformer Driver

شماره قطعه ADuM3470
شرح مفصل PWM Controller and Transformer Driver
تولید کننده Analog Devices 
آرم Analog Devices 


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ADuM3470 شرح
Data Sheet
PWM Controller and Transformer
Driver with Quad-Channel Isolators
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).
VDD1
VDDA
VIA/VOA
VIB/VOB
VIC/VOC
VID/VOD
1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329. Other patents pending.
FUNCTIONAL BLOCK DIAGRAMS
T1
RECT
X1 X2
VREG
ADuM3470/ADuM3471/
ADuM3472/ADuM3473/
DRIVER
ADuM3474
REG
PRIMARY
CONVERTER
FB
SECONDA RY
CONTROLLER
CH A
VDD2
5V
FB
OC
VISO
PRIMARY
DATA
I/O
4CH
CH B
CH C
CH D
SECONDA RY
DATA
I/O
4CH
GND1
GND2
Figure 1. Functional Block Diagram
VIA/VOA
VIB/VOB
VIC/VOC
VID/VOD
ADuM3470
ADuM3471
ADuM3472
ADuM3473
ADuM3474
Figure 2. Block Diagrams of I/O Channels
Rev. B
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. 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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شماره قطعه شرح مفصل تولید کنندگان
ADuM3470 PWM Controller and Transformer Driver Analog Devices
Analog Devices
ADuM3471 PWM Controller and Transformer Driver Analog Devices
Analog Devices
ADuM3472 PWM Controller and Transformer Driver Analog Devices
Analog Devices
ADuM3473 PWM Controller and Transformer Driver Analog Devices
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