Datasheet > 电源电路 > 电源管理电路> ADM1172-1AUJZ-RL7

ADM1172-1AUJZ-RL7

更新时间： 2024-11-29 04:31:19

品牌	Logo	应用领域
亚德诺 - ADI		电源电路比较器电源管理电路光电二极管控制器
页数	文件大小	规格书
16页	216K
描述
2.7 V to 16.5 V Hot Swap Controller with Power-Fail Comparator

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2.7 V to 16.5 V Hot Swap Controller

with Power-Fail Comparator

ADM1172

FEATURES

GENERAL DESCRIPTION

Controls supply rails from 2.7 V to 16.5 V

Allows protected board removal and insertion to a live

backplane

External sense resistor provides adjustable analog current

limit with circuit breaker

Peak fault current limited with fast response

Charge pumped gate drive for external N-FET switch

Power-fail comparator

The ADM1172 is a hot swap controller that safely enables a

printed circuit board to be removed and inserted to a live

backplane. This is achieved using an external N-channel power

MOSFET with a current control loop that monitors the load

current through a sense resistor. An internal charge pump is

used to enhance the gate of the N-channel FET. When an over-

current condition is detected, the gate voltage of the FET is

reduced to limit the current flowing through the sense resistor.

During an overcurrent condition, the TIMER pin capacitor

determines the amount of time the FET remains at a current

limiting mode of operation until it is shut down. The ON

Automatic retry or latch-off during current fault

Undervoltage lockout

8-lead, TSOT package

CLR

(ON-

) pin is the enable input for the device and can be

APPLICATIONS

used to monitor the input supply voltage. The ADM1172

operates with a supply voltage ranging from 2.7 V to 16.5 V.

Hot swap board insertion: line cards, raid systems

Industrial high-side switches/circuit breakers

Electronic circuit breakers

The ADM1172 also features a power-fail comparator. The

voltage on the PFI pin is compared with an internal 0.6 V

reference, and the output of this comparator is presented on

the PFO pin. This device is available in two options: the

ADM1172-1 with automatic retry for overcurrent fault and the

ADM1172-2 with latch-off for an overcurrent fault. Toggling

CLR

the ON (ON-

) pin resets a latched fault. The ADM1172 is

packaged in an 8-lead TSOT.

FUNCTIONAL BLOCK DIAGRAM

SENSE

LONG

= 5V

OUT

LOAD

SENSE

GATE

ON1

SHORT

PR1

ADM1172-1

PFI

ON2

PFO

TIMER

GND

PR2

TIMER

GND

LONG

GND

Figure 1.

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

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与ADM1172-1AUJZ-RL7相关器件

型号	品牌	获取价格	描述	数据表
ADM1172-2AUJZ-RL7	ADI	获取价格	2.7 V to 16.5 V Hot Swap Controller with Power-Fail Comparator
ADM1173-1AUJ	ADI	获取价格	IC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8, TSOT-8, Power Management Circuit
ADM1175	ADI	获取价格	Hot Swap Controller and Digital Power Monitor with Convert Pin
ADM1175-1ARMZ-R7	ADI	获取价格	Hot Swap Controller and Digital Power Monitor with Convert Pin
ADM1175-2ARMZ-R7	ADI	获取价格	Hot Swap Controller and Digital Power Monitor with Convert Pin
ADM1175-3ARMZ-R7	ADI	获取价格	Hot Swap Controller and Digital Power Monitor with Convert Pin
ADM1175-4ARMZ-R7	ADI	获取价格	Hot Swap Controller and Digital Power Monitor with Convert Pin
ADM1176	ADI	获取价格	Hot Swap Controller and I2C㈢ Power Monitor wi
ADM1176-1ARMZ-R7	ADI	获取价格	Hot Swap Controller and I2C㈢ Power Monitor wi
ADM1176-2ARMZ-R7	ADI	获取价格	Hot Swap Controller and I2C㈢ Power Monitor wi

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