Datasheet > ADuM4470ARIZ-RL

ADuM4470ARIZ-RL

更新时间： 2024-11-11 12:26:03

品牌	Logo	应用领域
亚德诺 - ADI		稳压器开关
页数	文件大小	规格书
36页	750K
描述
Isolated Switching Regulator with Quad-Channel Isolators

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ADuM4470ARIZ-RL 数据手册

Isolated Switching Regulator

with Quad-Channel Isolators

Data Sheet

ADuM4470/ADuM4471/ADuM4472/ADuM4473/ADuM4474

FUNCTIONAL BLOCK DIAGRAM

FEATURES

ISO

DD1

Isolated PWM feedback with built in compensation

Primary side transformer driver for up to 2.5 W output power

with 5 V input voltage

RECT

REG

ADuM4470/

ADuM4471/

ADuM4472/

ADuM4473/

ADuM4474

Regulated adjustable output: 3.3 V to 24 V

Up to 80% efficiency

Quad dc-to-25 Mbps (NRZ) signal isolation channels

200 kHz to 1 MHz adjustable oscillator

Soft start function at power-up

Pulse-by-pulse overcurrent protection

Thermal shutdown

5000 V rms isolation

DD2

REG

PRIMARY

CONTROLLER/

DRIVER

DDA

SECONDARY

CONTROLLER

INTERNAL

FEEDBACK

I/OA

I/OB

I/OC

I/OD

CHA

CHB

CHC

CHD

I/OB

I/OC

I/OD

PRIMARY

DATA I/O

4-CHANNEL

SECONDARY

DATA I/O

4-CHANNEL

High common-mode transient immunity: >25 kV/μs

20-lead SOIC package with 8.3 mm creepage

High temperature operation: 105°C

APPLICATIONS

GND

Power supply start-up bias and gate drives

Isolated sensor interfaces

Figure 1.

Process controls

RS-232/RS-422/RS-485 transceivers

GENERAL DESCRIPTION

The ADuM4470/ADuM4471/ADuM4472/ADuM4473/

ADuM4474¹are quad-channel, digital isolators with a regu-

lated dc-to-dc isolated power supply controller and an internal

MOSFET driver. The dc-to-dc controller has an internal isolated

PWM feedback from the secondary side, based on the

iCoupler® chip scale transformer technology and complete loop

compensation. This eliminates the need to use an optocoupler

for feedback and compensates the loop for stability.

The regulated feedback provides a relatively flat efficiency curve

over the full output power range. The ADuM447x enable a dc-

to-dc converter with a 3.3 V to 24 V isolated output voltage

range from either a 5.0 V or a 3.3 V input voltage, with an

output power of up to 2.5 W.

The ADuM447x isolators provide four independent isolation

channels in a variety of channel configurations and data rates.

(The x in ADuM447x throughout this data sheet stands for the

ADuM4470/ADuM4471/ADuM4472/ADuM4473/ADuM4474.)

The ADuM447x isolators provide a more stable output voltage

and higher efficiency compared to unregulated isolated dc-

to-dc power supplies. The fully integrated feedback and loop

compensation in a wide-body SOIC package provide a smaller

form factor and 8.3 mm creepage distance solution.

¹Protected by U.S. Patents 5,952,849; 6,873,065; and 7075 329 B2. Other patents pending.

Rev. 0

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.

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

Technical Support

www.analog.com

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与ADuM4470ARIZ-RL相关器件

型号	品牌	获取价格	描述	数据表
ADuM4470CRIZ	ADI	获取价格	Isolated Switching Regulator with Quad-Channel Isolators
ADuM4470CRIZ-RL	ADI	获取价格	Isolated Switching Regulator with Quad-Channel Isolators
ADuM4471	ADI	获取价格	Isolated Switching Regulator with Quad-Channel Isolators
ADuM4471ARIZ	ADI	获取价格	Isolated Switching Regulator with Quad-Channel Isolators
ADuM4471ARIZ-RL	ADI	获取价格	Isolated Switching Regulator with Quad-Channel Isolators
ADuM4471CRIZ	ADI	获取价格	Isolated Switching Regulator with Quad-Channel Isolators
ADuM4471CRIZ-RL	ADI	获取价格	Isolated Switching Regulator with Quad-Channel Isolators
ADuM4472	ADI	获取价格	Isolated Switching Regulator with Quad-Channel Isolators
ADuM4472ARIZ	ADI	获取价格	Isolated Switching Regulator with Quad-Channel Isolators
ADuM4472ARIZ-RL	ADI	获取价格	Isolated Switching Regulator with Quad-Channel Isolators

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