ADP1043A: Digital Controller

ADP1043A.Digital Controller for Isolated Power Supply Applications

The ADP1043A is a secondary side power supply controller IC designed to provide all the functions that are typically needed in an ac-to-dc or isolated dc-to-dc control application.

The ADP1043A is optimized for minimal component count, maximum flexibility, and minimum design time. Features include remote voltage sense, local voltage sense, primary and secondary side current sense, pulse-width modulation (PWM) generation, and hot-swap sense and control. The control loop is digital with an integrated programmable digital filter. Protection features include current limiting, ac sense, undervoltage lockout (UVLO), and overvoltage protection (OVP).

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 redundancy of critical 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 ADP1043A is available in a 32-lead LFCSP and operates from a single 3.3 V supply.

Applications

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

特性

Digital control loop

Remote and local voltage sense

Primary and secondary side current sense

PWM control

Synchronous rectifier control

Current sharing

Integrated programmable loop filter

I²C interface

Extensive fault detection and protection

Extensive programming

Fast calibration

EEPROM

Standalone or microcontroller control

Functional Block Diagram for ADP1043A