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GENERAL DESCRIPTION

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.

FEATURES

Digital calibration via internal EEPROM

Supports SSI specification

Comprehensive fault detection

Reduced component count on secondary side

Standalone or microcontroller control

SECONDARY-SIDE FEATURES

Generates error signal for primary-side PWM

Output voltage adjustment and margining

Current sharing

Current-limit adjustment

OrFET control

Programmable soft-start slew rate

Standalone or microcontroller operation

Differential load voltage sense

AC mains undervoltage detection (ac sense)

Overvoltage protection

INTERFACE AND INTERNAL FEATURES

SMBus interface (I2C-compatible)

Voltage-error amplifier

Differential current sense

Sense resistor or current transformer option

Overvoltage protection

Undervoltage protection

Overcurrent protection

Overtemperature protection

Start-up undervoltage blanking

Programmable digital debounce and delays

352-byte EEPROM available for field data

160-byte EEPROM for calibration

Ground continuity monitoring

APPLICATIONS

Network servers

Web servers

Power supply control