Communications Power

Eighth-Brick DC-DC Converter for PoE Applications

Semiconductor Circuits, Inc. introduces the CPE1U48 open frame eighth-brick dc-dc converter that conforms to industry standard specifications. The converter operates over an input voltage range of 36- to 72-Vdc, and provides a tightly regulated output voltage with an output current rating of 1.25A at 48Vdc and can be adjusted to suit a variety of PoE (Power over Ethernet) applications. The output is fully isolated from the input and the converter meets Basic Insulation requirements.

The standard feature set includes remote On/Off (positive or negative enable), input under-voltage lockout, output overvoltage protection, over-current and short circuit protections, output voltage trim, remote sense and over-temperature shutdown with hysteresis. The high efficiency of the CPE1U48 allows operation over a wide ambient temperature range with minimal de-rating (full rated power at 70 degrees C and 200LFM (1m/s) airflow at 48 Vin.).This new PoE optimized product s compliant with DOSA footprint and interface standards and provides 2250Vdc input-to-output isolation. Custom values can also being manufactured to match varied voltage requirements in PoE products.

The CPE series is a high efficiency module product family with efficiencies exceeding 90% from half load through full load. They meet EN 60950 basic insulation requirements and are UL94 V-0 flammability rated. Safety certification by TUV has been granted for most members of the family and the remaining ones are in the certification process. The modules comply with typical industry requirements including no load operation, 2 X nominal input voltage transient and pre-biased load startup.

Other features include: fixed-frequency operation, auto-restart OVP, OCP & OTP protections, UVLO, remote sense and +10%/-20% output voltage trim using industry standard equations. Remote ON/OFF is standard with positive or negative logic options available. These converters feature standard eighth-brick pin-outs and dimensions of 2.3" L x 0.9" W (58.4mm x 22.9mm.) It has a maximum height of 10.3mm (0.404") which accommodates tight card spacing with minimal airflow blockage of downstream components.

Semiconductor Circuits, Inc.
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