Datasheet > ADM1176

ADM1176

更新时间： 2024-11-07 04:31:19

品牌	Logo	应用领域
亚德诺 - ADI		监控控制器
页数	文件大小	规格书
24页	676K
描述
Hot Swap Controller and I2C㈢ Power Monitor with Convert Pin

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中文翻译

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数据手册

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ADM1176 数据手册

Hot Swap Controller and

I²C^®Power Monitor with Convert Pin

ADM1176

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Allows safe board insertion and removal from a live backplane

Controls supply voltages from 3.15 V to 16.5 V

Precision current sense amplifier

ADM1176

MUX

VCC

Precision voltage input

SDA

SCL

12-BIT

ADC

12-bit ADC for current and voltage readback

Charge pumped gate drive for external N-channel FET

Adjustable analog current limit with circuit breaker

3ꢀ accurate hot swap current limit level

Fast response limits peak fault current

Automatic retry or latch-off on current fault

Programmable hot swap timing via TIMER pin

Active-high ON pin

I C

SENSE

CURRENT

SENSE

AMPLIFIER

FET DRIVE

CONTROLLER

GATE

1.3V

UV COMPARATOR

GND

I²C® fast mode-compliant interface (400 kHz maximum)

Two address pins allow 16 devices on the same bus

10-lead MSOP

TIMER

Figure 1.

APPLICATIONS

3.15V TO 16.5V

N-CHANNEL FET

SENSE

Power monitoring/power budgeting

Central office equipment

VCC

SENSE

GATE

Telecommunication and data communication equipment

PCs/servers

CONTROLLER

P = VI

ADM1176

SDA

SCL

GENERAL DESCRIPTION

SCL

The ADM1176 is an integrated hot swap controller that offers

digital current and voltage monitoring via an on-chip, 12-bit

analog-to-digital converter (ADC), communicated through an

I²C interface.

TIMER

GND

Figure 2. Applications Diagram

An internal current sense amplifier senses voltage across the sense

resistor in the power path via the VCC pin and the SENSE pin.

The ADM1176 limits the current through this resistor by control-

ling the gate voltage of an external N-channel FET in the power

path, via the GATE pin. The sense voltage (and, therefore, the

inrush current) is kept below a preset maximum.

A 12-bit ADC can measure the current seen in the sense

resistor, as well as the supply voltage on the VCC pin. An

industry-standard I²C interface allows a controller to read

current and voltage data from the ADC. Measurements can be

initiated by an I²C command. Alternatively, the ADC can run

continuously, and the user can read the latest conversion data

whenever it is required. Up to 16 unique I²C addresses can be

created, depending on the way the A0 and A1 pins are connected.

The ADM1176 protects the external FET by limiting the time

that it spends with maximum current running through it. This

current limit period is set by the choice of capacitor attached to

the TIMER pin. Additionally, the device provides protection from

overcurrent events that may occur once the hot swap event is

complete. In the case of a short-circuit event, the current in the

sense resistor exceeds an overcurrent trip threshold, and the FET

is switched off immediately by pulling down the GATE pin.

The ADM1176 is packaged in a 10-lead MSOP.

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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