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ADM1176-2ARMZ-R7 PDF预览

ADM1176-2ARMZ-R7

更新时间: 2024-11-29 03:53:15
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监控控制器
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24页 676K
描述
Hot Swap Controller and I2C㈢ Power Monitor with Convert Pin

ADM1176-2ARMZ-R7 数据手册

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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  
V
VCC  
0
Precision voltage input  
SDA  
SCL  
12-BIT  
ADC  
2
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  
I
1
A
A1  
A0  
SENSE  
CURRENT  
SENSE  
AMPLIFIER  
FET DRIVE  
CONTROLLER  
ON  
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  
R
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  
SDA  
SCL  
ON  
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  
A1  
A0  
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  
©2006 Analog Devices, Inc. All rights reserved.  
 

ADM1176-2ARMZ-R7 替代型号

型号 品牌 替代类型 描述 数据表
ADM1176-1ARMZ-R7 ADI

完全替代

Hot Swap Controller and I2C㈢ Power Monitor wi

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