ADM1178 - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

ADM1178
Manufacturer

ADI
ChipWorker Part#

CW430791984
Description

Hot Swap Controller and Digital Power Monitor with ALERTB Output
Documentation

Datasheet

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ADM1178 Specifications

Attribute	Attribute Value

Part Number	ADM1178
Manufacturer	ADI
ChipWorker Part#	CW430791984
Documentation	Datasheet
Case/Package	LEAD-10
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Product Lifecycle Status	Active

Product Description

Product Details
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 measures voltage across the sense resistor in the power path via the VCC pin and the SENSE pin.
The ADM1178 limits the current through this resistor by control-ling the gate voltage (via the GATE pin) of an external N-channel FET in the power path. The voltage across the sense resistor (and therefore the inrush current) is kept below a preset maximum.
The ADM1178 protects the external FET by limiting the time that the maximum current runs through it. This current limit period is set by the value of the capacitor attached to the TIMER pin. Additionally, the device provides protection from overcurrent events that may occur after the hot swap event is complete. In 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.
A 12-bit ADC can measure the current seen in the sense resistor, as well as the supply voltage on the VCC pin. An alert output can be set to trigger when the ADC current reading exceeds a programmed overcurrent limit threshold.
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 four unique I2C addresses can be created, depending on how the ADR pin is connected.
The ADM1178 is packaged in a 10-lead MSOP.
**Applications**
Power monitoring/power budgeting
Central office equipment
Telecommunication and data communication equipment
PCs/servers
### Features and Benefits
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
Please see data sheet for additional features.

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