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ADM1073ARUZ-REEL7

更新时间： 2024-11-29 12:35:31

品牌	Logo	应用领域
亚德诺 - ADI		电源电路电源管理电路光电二极管信息通信管理控制器
页数	文件大小	规格书
24页	376K
描述
Full-Feature â48 V Hot Swap Controller

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Full-Feature −48 V Hot Swap Controller

Data Sheet

ADM1073

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Precision inrush linear current limit

Soft start inrush current limit profiling

Precision maximum on-time in current limit

Maximum on-time modulated by FET drain voltage for

additional SOA protection

Adjustable PWM retry scheme and multiple device cascading

capability for charging large capacitive loads

Limited number of PWM cycles for FET SOA protection under

short circuit condition

Ability to configure device as continuous autoretry with a

5-second cooling period

Shunt regulator topology to allow very large transient input

supplies

SPLYGD

PWRGD

DRAIN

AND

FOLDBACK

AND PWRGD

REFERENCE

GENERATOR

OVERVOLTAGE

DETECTOR

UNDERVOLTAGE

DETECTOR

50∝A

100mV(MAX)

GATE

SOFT START

CONTROL

SENSE

t_ONCONTROL

TIMER

FAULT TIMER

AND CONTROL

5 SECOND

SHUTDOWN

Separate UV and OV pins for programming allowable input

supply window

PWM

TIMEOUT

OSCILLATOR

Programmable OV hysteresis using current source into pin

when supply is high

SHDN

RESTART

LATCHED

Programmable UV hysteresis using current sink from pin

when supply is low

Figure 1.

output indicates when capacitor charging complete

PWRGD

APPLICATIONS

output indicates when supply is within

Central office switching

SPLYGD

valid window

Telecommunication and data communication equipment

−48 V distributed power systems

Negative power supply control

High availability servers

output indicates the end of the retry cycle before

LATCHED

load capacitance is charged

input for user-commanded shutdown

SHDN

input for user-triggered 5-second shutdown and

autorestart— virtual card reseat

RESTART

−48 V power supply modules

Disk arrays

GENERAL DESCRIPTION

The ADM1073 is a full-feature, negative voltage, hot swap

controller that allows boards to be safely inserted and removed

from a live −48 V backplane. The part provides precise and

robust current limiting, and protection against both transient

and nontransient short circuits in overvoltage and undervoltage

conditions. The ADM1073 can operate from a negative voltage

of −18 V to −80 V and can tolerate transient voltages of up to

−200 V.

A built-in soft start function allows control of the inrush

current profile by an external capacitor on the soft start (SS)

pin.

An external capacitor on the TIMER pin determines the time

for which the FET gate is controlled to be high when maximum

inrush current flows. The ADM1073 employs a limited consec-

utive retry scheme, whereby, if the load capacitance is not fully

charged within one attempt, the FET gate is pulled low and

retries after a cooling period.

Inrush current is limited to a programmable value by control-

ling the gate drive of an external N-channel FET. The maximum

(continued on Page 3)

current limit is set by the choice of the sense resistor, R_SENSE

Rev. B

Document Feedback

Information furnishedby Analog Devices is believedto be accurate andreliable. However, no

responsibilityisassumedbyAnalog Devices for its use, nor for anyinfringements of patents or other

rightsofthird partiesthat may result from its use. Specifications subject to change without notice. No

license isgrantedbyimplication or otherwise under anypatent 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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ADM1073ARUZ-REEL7 替代型号

型号	品牌	替代类型	描述	数据表
ADM1073ARUZ-REEL	ADI	完全替代	Full-Feature â48 V Hot Swap Controller
ADM1073ARUZ	ADI	完全替代	Full-Feature â48 V Hot Swap Controller
ADM1073ARU	ADI	完全替代	Full-Feature −48 V Hot Swap Controller

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