ADM1270CP-EVALZ Просмотр технического описания (PDF) - Analog Devices

Номер в каталоге

Компоненты Описание

производитель

ADM1270CP-EVALZ

High Voltage Input Protection Device

Analog Devices 

Data Sheet

High Voltage Input Protection Device

ADM1270

FEATURES

Controls supply voltages from 4 V to 60 V

Gate drive for low voltage drop reverse supply protection

Gate drive for P-channel FETs

Inrush current limiting control

Adjustable current limit

Foldback current limiting

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

16-lead QSOP

APPLICATIONS

Industrial modules

Battery-powered/portable instrumentation

GENERAL DESCRIPTION

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.

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.

SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM

VCC/SENSE+ SENSE–

RPFG

VCAP

LDO

+–

ADM1270

UV

+

1V –

OV

–

1V +

IOUT

GATE DRIVE/

LOGIC

GATE

ISET

REF

SELECT

CURRENT-

LIMIT

CONTROL

TIMEOUT

CURRENT

+ LIMIT

–

TIMER

ON

TIMER

VCB

ENABLE FAULT PWRGD GND

Figure 1.

FLB

FB_PG

TIMER_OFF

TIMER

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

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 registered trademarks are the property of their respective owners.

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

Tel: 781.329.4700 ©2014–2016 Analog Devices, Inc. All rights reserved.

Technical Support

www.analog.com

Share Link: