Phihong USA Announces New PSA-15W Power SupplyJanuary 23, 2000 by Jeff Shepard
Phihong USA (Fremont, CA) recently introduced a desktop power supply for the international market, the PSA-15W. According to Phihong, the PSA-15W requires only two ac input wires, eliminating the need for the third (ground) wire commonly used in the US and Europe. As a result, the company claims the PSA-15W will operate from any worldwide line voltage, including those countries with simple two-wire ac power-distribution grids.
The PSA-15W has ac-line filtering to reduce conducted noise below FCC Class B and CISPR B limits without the need for the ground connection. The double-insulated adaptor's ground leakage current is less than 250uA, and there is virtually no radiated EMI field, according to the company. Phihong states that the PSA-15W is UL listed, CSA certified and carries the European CE mark. It is also MITI approved for use in Japan and TUV certified to EN60950.
The device includes output short-circuit protection with automatic recovery and measures 4.3" x 2.6" x 1.0". The enclosure is designed to provide adequate cooling while protecting the power supply from accidentally spilled liquids. The IEC EN60320/C7 connector is used for the ac input, and a 5.5mm coaxial plug terminates the end of a 1m output cable.
"There remains a significant number of countries in the world that have only a two-wire ac power-distribution grid," said Alan Richards, vice president of Phihong USA. "The use of three-wire universal input switchers that require a ground lead can be dangerous if not illegal. The PSA-15W safely delivers power for notebook computers in these countries."
In quantities of 100, pricing for the PSA-15W is $15.40 each and samples are currently available.