8/18/2003
Edited by PE Tech Staff
150W Switcher
Taiyo Yuden Inc.’s new PAS150 is the first model in the company’s new PAS Series of affordable, passive PFC-based, switch mode power supplies for 1U-height single-output applications. The PAS150 provides tremendous economic benefits to OEMs by employing passive PFC technology—vs. the more complex, less reliable, active PFC technology that now provides unnecessary functionality at higher cost, thanks to the recent declassification of many Class D end devices to less stringent Class A standards per EN61000-3-2 harmonic distortion standards. The PAS150 switcher not only meets all Class A PFC requirements, but also provides greater reliability and higher MTBF (mean time between failure) through use of fewer components. Furthermore, the relative cost per Watt of a passive PFC switcher like the PAS150 is significantly less than a comparable switch mode power supply employing active PFC techniques.
In operation, the PAS150 switcher provides a universal 115/230Vac input selection and a single output of 150W continuous power. The user can select one of several factory-set output voltages, including 3.3V, 5V, 12V, 24V, and 48V. The PAS150 switcher features optional current-sharing capability for 1+1 redundancy with no special interconnection requirement. Other options include remote on/off, and droop or single-wire current sharing with OR-ing diodes. The standard unit provides superb heat dissipation, and also offers an optional fan with its own 12Vdc supply.
For more information, visit www.t-yuden.com.