Secondary-Side Controller with Current Share and Housekeeping

ADM1041

INTERFACE AND INTERNAL FEATURES

SMBus interface (I2C compatible) Low-drift precision 2.5 V reference 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

PRODUCT 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

APPLICATIONS

Network servers Web servers

Power supply control

Figure 1. Typical Application Circuit

Rev. A

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