ADP1050

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Digital Controller for Isolated Power Supply with PMBus Interface

Data Sheet (Rev. B) Product Selection Table
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Overview

  • Versatile digital voltage mode controller
  • High speed input voltage feedforward control
  • 4 pulse-width modulation (PWM) logic outputs with 625 ps resolution
  • Switching frequency: 49 kHz to 625 kHz
  • Frequency synchronization as slave device
  • Pulse skipping power saving mode
  • Prebias startup
  • Conditional overvoltage protection
  • Extensive fault detection and protection
  • PMBus compliant
  • Graphical user interface (GUI) for ease of programming
  • On-board EEPROM for programming and data storage
  • Available in a 20-lead, 4 mm × 4 mm LFCSP
  • −40°C to +125°C operating temperature

The ADP1050 is an advanced digital controller with a PMBus™ interface targeting high density, high efficiency dc-to-dc power conversion. This controller implements voltage mode control with high speed, input voltage feedforward operation for enhanced transient and noise performance. The ADP1050 has four programmable pulse-width modulation (PWM) outputs capable of controlling most high efficiency power supply topologies, with the added control of synchronous rectification (SR).

The ADP1050 implements several features to enable a robust system of parallel and redundant operation for customers who require high availability. The device provides synchronization, prebias startup, and conditional overvoltage techniques to identify and safely shut down an erroneous power supply in parallel operation mode.

The ADP1050 is based on flexible state machine architecture and is programmed using an intuitive graphical user interface (GUI). The easy-to-use GUI reduces design cycle time and results in a robust, hardware coded system loaded into the built-in EEPROM. The small size (4 mm × 4 mm) of the LFCSP package makes the ADP1050 ideal for ultracompact, isolated dc-to-dc power module or embedded power designs.

Applications

  • High density, isolated dc-to-dc power supplies
    • Intermediate bus converters
    • High availability parallel power systems
  • Server, storage, industrial, networking, and communications infrastructure
ADP1050
Digital Controller for Isolated Power Supply with PMBus Interface
ADP1050 Typical Application Diagram ADP1050 Pin Configuration
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Documentation

Data Sheet 1

User Guide 2

Application Note 1

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Software Resources

Device Drivers 2

Evaluation Kits

eval board
schematic 1
EVAL-ADP1050

ADP1050 Evaluation Board

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Product Details

The ADP1051-240-EVALZ evaluation board, together with an ADP1050DC1-EVALZ daughter card, allows the user to evaluate the ADP1050 in a power supply unit (PSU) environ-ment. The boards are fully compatible with the ADP1050-51 GUI software. With the ADP-I2C-USB-Z USB-to-I2C connector and the GUI software, the ADP1050 on the evaluation board can be interfaced with a PC via a USB port.

The evaluation board allows the ADP1050 to be exercised without the need for external components. The board is set up to act as an isolated PSU, outputting a rated load of 12 V, 20 A from a 36 V dc to 75 V dc source.


Multiple test points allow easy access to all critical points/pins. Three LEDs give the user a direct visual indication of variations in the board status, such as the system input voltage, PGOOD output, and FLAGIN input.


Full performance details are provided in the ADP1050 data sheet, which should be consulted in conjunction with user guide.

EVAL-ADP1050
ADP1050 Evaluation Board
EVAL-ADP1051 Image

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