Datasheet > ADM1270CP-EVALZ

ADM1270CP-EVALZ

更新时间： 2024-09-18 01:07:19

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亚德诺 - ADI		/
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High Voltage Input Protection Device

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ADM1270CP-EVALZ 数据手册

High Voltage Input Protection Device

ADM1270

Data Sheet

FEATURES

SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM

VCC/SENSE+ SENSE–

Controls supply voltages from 4 V to 60 V

Gate drive for low voltage drop reverse supply protection

Gate drive for P-channel FETs

RPFG

ADM1270

Inrush current limiting control

VCAP

LDO

–

Adjustable current limit

Foldback current limiting

OUT

Automatic retry or latch-off on current fault

Programmable current-limit timer for safe operating area (SOA)

Power-good and fault outputs

Analog undervoltage (UV) and overvoltage (OV) protection

16-lead, 3 mm × 3 mm LFCSP

–

GATE DRIVE/

LOGIC

GATE

–

16-lead QSOP

APPLICATIONS

REF

SELECT

FLB

ISET

CURRENT

LIMIT

Industrial modules

Battery-powered/portable instrumentation

–

CURRENT-

FB_PG

LIMIT

TIMER

CONTROL

GENERAL DESCRIPTION

TIMER_OFF

TIMER

The ADM1270 is a current-limiting controller that provides

inrush current limiting and overcurrent protection for modular

or battery-powered systems. When circuit boards are inserted

into a live backplane, discharged supply bypass capacitors draw

large transient currents from the backplane power bus as they

charge. These transient currents can cause permanent damage

to connector pins, as well as dips on the backplane supply that

can reset other boards in the system.

TIMER

TIMEOUT

FAULT

ENABLE

PWRGD

GND

Figure 1.

The ADM1270 is designed to control the inrush current, when

powering on the system, via an external P-channel field effect

transistor (FET).

To protect the system from a reverse polarity input supply, there

is a provision made to control an additional external P-channel

FET. This feature prevents reverse current flow in case of a reverse

polarity connection, which can damage the load or the ADM1270.

The ADM1270 is available in a 3 mm × 3 mm, 16-lead LFCSP and

a 16-lead QSOP.

Rev. A

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

rightsof third parties that may result fromits 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 andregisteredtrademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Technical Support

www.analog.com

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