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ADM1178:  Hot Swap Controller and Digital Power Monitor with ALERTB Output

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 ...More

ADM1178:  Hot Swap Controller and Digital Power Monitor with ALERTB Output

Product 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 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

RESOURCES & TOOLS

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EVALUATION BOARDS & DEVELOPMENT KITS

  • 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.
  • Other Outputs: ALERTB
  • Package: 10-Lead MSOP
  • UV & OV Detection: ON pin (UV)
  • Digital V & I Readback: I2C Interface,w/ 4 Addreses
  • Operating Range(V): 3.15 to 16.5

Functional Block Diagram for ADM1178

Similar Products

arrow View Full Interactive Product Selection Table
Part# Operating Range(V) UV & OV Detection Digital V & I Readback Other Inputs Other Outputs Package Price* (1000-4999)
ADM1170 1.6 to 16.5 ON pin (UV) - - - 8 ld TSOT $2.13
ADM1171 2.7 to 16.5 ON pin (UV) - - CS_OUT 8 ld TSOT $2.23
ADM1172 2.7 to 16.5 ON pin (UV) - PFI PFO 8 ld TSOT $2.02
ADM1175 3.15 to 16.5 ON pin (UV), ONB pin (OV) I2C Interface, w/ 4 Addreses CONV Pin - 10-Lead MSOP $2.53
ADM1176 3.15 to 16.5 ON pin (UV) I2C Interface, w/ 16 Addresses - - 10-Lead MSOP $2.53
ADM1177 3.15 to 16.5 ON pin (UV) I2C Interface, w/ 4 Addreses - - 10-Lead MSOP $2.53
ADM1178 3.15 to 16.5 ON pin (UV) I2C Interface, w/ 4 Addreses - ALERTB 10-Lead MSOP $2.73
ADM4210 2.7 to 16.5 ON pin (UV) - - - 6-ld TSOT $3.02
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* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

Pricing, Packaging & Availability

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For detailed drawings and chemical composition please consult our  Package Site

Pin Count
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This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
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  • Automotive: -40 to +125 degrees Celsius
Price
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

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This is the list of Product Change Notifications (PCN) published on the web for this model. Click on the link to access PCN Information.Only select pre-2009 PCN�s are available on-line. To obtain a pre-2009 PCN, contact your ADI Sales Rep. For more information on ADI's PCN process, please visit our PCN Policy Statement page

*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.