New 54mm 1U AC/DC supplies feature N+1 redundancy and PMBus communication

CUI has introduced a new 1100W front-end AC/DC power supply for mission-critical (N+1) redundant applications. The PSA-1100-12 delivers a power density of 25.34 W/cubic inch and achieves efficiencies approaching 94% in a compact slim line 1U package measuring just 40mm x 54.5mm x 321.3mm. The narrow 54 mm profile allows designers to minimize application space compared to larger solutions on the market. The power supply outputs 12VDC with 5VDC or 3.3VDC pin-selectable standby. The PSA-1100-12 is hot pluggable with an IEC320 ac connector at the front and an industry standard output connector that integrates dc power and signal pins at the back. The unit is ideally suited for telecom, server and networking rack-mount applications where reliability, power density, and energy consumption are key considerations. The PSA-1100-12 features system communications via I2C/PMBus protocol for control and monitoring of the unit. The main 12VDC output delivers up to 92A with droop current sharing for paralleling multiple units; forced current sharing is optional. For maximum flexibility, the series is available in front-to-back or back-to-front airflow configurations depending on the application’s cooling requirements. The PSA-1100-12 also offers 60950-1 safety approvals, bears the CE Mark, and complies with all applicable EMC requirements to accommodate world wide applications. Protections for over-voltage, over-current, over-temperature, and input under-voltage are standard, says the company.