The convergence of the telecom and datacom industry has not come as far when it comes to power solutions yet. Traditionally the telecom industry has used 24 or 48 V DC solutions with rather long battery backup for high availability, while the datacom industry has been using AC UPS with less than an hour reserve time. However, more and more companies are moving towards a distributed power architecture, normally 48 V bus, enabling both the telecom and the datacom equipment to operate from a 48 V battery back-up. There is also a move towards 350 V DC systems as direct replacements for AC UPSs.


Typical characteristics of Communications Power Supplies:

• Environment and EMC requirements are tough
• 48V and 24 V predominant in telecom while AC UPSs are most common solution in datacom

• Converters and rectifiers for telecom, DC power systems, broadcasting applications, niche datacom applications

AC/DC power supply designed for a high end broadcast application 150W output power Dual output +7V/–7V Input voltage range 90-264VAC

DC/DC converter to be used in outdoor mobile radiobase application. Designed for mounting inside DC/DC converter –48VDC input, and –5 VDC and +28    VDC Outputs Output power 135 W, (45 W @ –5VDC, 90 W @ +28VDC) Input voltage –35 to –57 VDC, polarity protected Input lighting protection 4 kA 10/350 us waveform Internal thermal protection Temperature range –40 to + 70 degree C (on cooling    flange)