Hot Swap Controller and Digital Power Monitor
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Hot Swap Controller and Digital Power Monitor with ALERTB Output ADM1178
FEATURES
Allows safe board...
Description
www.DataSheet4U.com
Hot Swap Controller and Digital Power Monitor with ALERTB Output ADM1178
FEATURES
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 Precision voltage input 12-bit ADC for current and voltage readback Charge pumped gate drive for external N-channel FET Adjustable analog current limit with circuit breaker ±3% 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 ALERTB output for overcurrent interrupt I2C® fast mode-compliant interface (400 kHz maximum) 10-lead MSOP
FUNCTIONAL BLOCK DIAGRAM
ADM1178
MUX VCC V 0 12-BIT ADC 1 SDA I2 C SCL ADR CURRENT SENSE AMPLIFIER
I A SENSE
ALERT
ALERTB
ON 1.3V
FET DRIVE CONTROLLER
GATE
GND
TIMER
Figure 1.
APPLICATIONS
Power monitoring/power budgeting Central office equipment Telecommunication and data communication equipment PCs/servers
3.15V TO 16.5V
RSENSE
N-CHANNEL FET
VCC
SENSE GATE
CONTROLLER P = VI
SDA SCL INTERRUPT
ADM1178
GENERAL DESCRIPTION
The ADM1178 is an integrated hot swap controller and current sense amplifier that offers digital current and voltage monitoring via an on-chip, 12-bit analog-to-digital converter (ADC), communicated through an I2C interface. An internal current sense amplifier senses voltage across the sense resistor in the power path via the VCC pin and t...
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