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ADUM3471CRSZ PDF预览

ADUM3471CRSZ

更新时间: 2024-02-23 00:50:09
品牌 Logo 应用领域
亚德诺 - ADI 变压器驱动器控制器
页数 文件大小 规格书
32页 566K
描述
PWM Controller and Transformer Driver with Quad-Channel Isolators

ADUM3471CRSZ 数据手册

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PWM Controller and Transformer Driver  
with Quad-Channel Isolators  
ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474  
FEATURES  
FUNCTIONAL BLOCK DIAGRAMS  
T1  
Isolated PWM controller  
V
V
CC  
RECT  
ISO  
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  
V
REG  
X1  
X2  
ADuM3470/ADuM3471/  
ADuM3472/ADuM3473/  
ADuM3474  
V
DD2  
V
REG  
DD1  
5V  
CONVERTER  
PRIMARY  
DRIVER  
FB  
SECONDARY  
CONTROLLER  
FB  
OC  
High temperature operation: 105°C  
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  
CHA  
CHB  
CHC  
CHD  
V
DDA  
I/OA  
I/OB  
I/OC  
I/OD  
I/OA  
I/OB  
I/OC  
I/OD  
PRIMARY  
DATA  
I/O  
SECONDARY  
DATA  
I/O  
4CH  
4CH  
2500 V rms isolation  
GND  
GND  
2
1
APPLICATIONS  
Figure 1. Functional Block Diagram  
ADuM3470 ADuM3471  
RS-232/RS-422/RS-485 transceivers  
Industrial field bus isolation  
Power supply startup bias and gate drives  
Isolated sensor interfaces  
Process controls  
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.  
ADuM3472  
ADuM3473  
ADuM3474  
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.)  
Figure 2. Block Diagrams of I/O Channels  
1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7075 329 B2. Other patents pending.  
Rev. 0  
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.  
Trademarks and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
©2010 Analog Devices, Inc. All rights reserved.  
 

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