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ADP1046:  Digital Controller for Isolated Power Supply Applications

Product Details

Newer Alternatives:
  • ADP1046A: Digital Controller for Isolated Power Supply Applications

The ADP1046 is a flexible, digital secondary side controller designed for ac-to-dc and isolated dc-to-dc secondary side applications. The ADP1046 is pin-compatible with the ADP1043A and offers several enhancements and new features, including voltage feedforward, improved loop response, and programmable dead time control to maximize efficiency.

The ADP1046 is optimized for minimal component count, maximum flexibility, and minimum design time. Features include local and remote voltage sense, primary and secondary side current sense, digital pulse-width modulation (PWM) generation, current sharing, and redundant OrFET control. The control loop digital filter and compensation terms are integrated and can be programmed over the I2C interface. Programmable protection features include overcurrent protection (OCP), over-voltage protection (OVP), undervoltage lockout (UVLO), and overtemperature protection (OTP).

The built-in EEPROM provides extensive programming of the integrated loop filter, PWM signal timing, inrush current, and soft start timing and sequencing. Reliability is improved through a built-in checksum and programmable protection circuits.

A comprehensive GUI is provided for easy design of loop filter characteristics and programming of the safety features. The industry-standard I2C bus provides access to the many monitoring and system test functions.

The ADP1046 is available in a 32-lead LFCSP and operates from a single 3.3 V supply.


  • AC-to-DC power supplies
  • Isolated dc-to-dc power supplies
  • Redundant power supply systems
  • Server, storage, network, and communications infrastructure


  • Integrates all typical PWM controller functions:
    - 7 PWM control signals
    - Digital control loop
    - Integrated programmable loop filters
    - Programmable voltage line feed forward
    - Dedicated soft start filter
  • I2C Interface
  • Extensive fault detection and protection
  • Extensive programming and telemetry
  • Additional typical PWM controller functions:
    - Programmable dead-time for improved efficiency
    - Remote and local voltage sense
    - Primary and secondary side current sense
  • Synchronous rectifier control
    - Current sharing
    - ORFET control
  • Fast digital calibration
  • User accessible EEPROM

Typical Application Circuit Diagram for ADP1046

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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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