Agency-approved power supply cuts cost, leadtimes
By Margery Conner, Technical Editor -- EDN, March 2, 2006
Applications requiring nonstandard power-supply voltages, especially for industrial, IT, or medical markets, usually require a custom power supply, with the attendant added expense and delivery time. Targeting that problem, XP Power has introduced an ac/dc switching power supply that enables system designers to specify any voltage level up to the maximum rating of each output and still maintain full agency approvals. The RCL175 power supply is available with one to four outputs: 3 to 60V, 5 to 60V, and 5 to 30V on the two remaining outputs. The isolated 5 to 30V outputs allow parallel or series connection for further flexibility. Users can adjust the 3 to 60V output by ±10%, and the other outputs track this output by ±10%. The compact power supply targets use in industrial, IT, and medical applications and suits both Class I, which includes supplies with a ground connection, and Class II, covering those with no ground connection.
The supply uses a silicon-carbide diode to maximize efficiency and minimize component count in the power-factor-correction boost converter. The fractional-turn transformer allows combinations of outputs, such as 3.3 and 5V, without postregulation. The product sells for $155 (100).
