Secondary-Side Controller with Current Share and Housekeeping

Manufactured by:

Product Details

The ADM1041A is a secondary-side and management IC specifically designed to minimize external component counts and to eliminate the need for manual calibration or adjustment on the secondary-side controller. The principle application of this IC is to provide voltage control, current share, and housekeeping functions for single output in N+1 server power supplies.

The ADM1041A is manufactured with a 5 V CMOS process and combines digital and analog circuitry. An internal EEPROM provides added flexibility for trimming timing and voltage and selecting various functions. Programming is done via an SMBus serial port that also allows communication capability with a microprocessor or microcontroller.

The usual configuration using this IC is on a one-per-output voltage rail. Output from the IC can be wire-OR’ed together or bused in parallel and read by a microprocessor. A key feature on this IC is support for an OrFET circuit when higher efficiency or power density is required.


  • Network Servers
  • Web Servers
  • Power Supply Control

Product Lifecycle

icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits


X +


EVAL-ADM1041A Circuit Diagram

Product Details

This evaluation board allows the ADM1041 to be quickly evaluated in a switching power supply application. Using the evaluation board and its accompanying software, the ADM1041 can be interfaced to any PC running Windows® 2000, Windows NT, or Windows XP via the computer’s USB port.

The evaluation board allows all the input and output functions of the ADM1041 to be exercised without external components. The software allows control and monitoring of the ADM1041 internal registers. The board is set up for the ADM1041 to act as a switching power supply, outputting a 12 V/2 A dc supply from a 110 V ac or dc input. By connecting two evaluation boards together, you can exercise and evaluate the share bus and current sharing capability for n + 1 redundant power supply systems.

Tools & Simulations

X +

Design Tools

Design Resources

X +

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

ADM1041A Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints



ADM1041A Discussions

Didn't find what you were looking for? Ask the Analog community »

Sample & Buy

Check Inventory

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.

Price Table Help