Vicor V1-MUH-ES

Vicor's FlatPAC consists of an offline single phase AC front end and one, two or three VI-26x / VI-B6x Family DC-DC converter modules (1-up, 2-up, 3-up), combined in an integrated mechanical assembly. This assembly provides a complete, high efficiency, offline switching power supply delivering power up to 600 W. The offline front end provides rectification and filtering of the AC input,delivering a nominal unregulated 300 Vdc bus as input to the VI-26x / VI-B6x Family converter modules. The front end control circuit will automatically strap the bridge as a voltage doubler for 115 Vac operation or as a full bridge for 230 Vac operation.

The BUS-OK and AC-OK outputs provide the user with both an optically isolated status indication of the internal DC bus condition and advance warning of pending DC bus drop-out due to AC line loss. These outputs, in system applications, can provide power supply status, switch in (standby) backup sources or initiate "power-down" sequences to save volatile memory contents in the event of AC line loss.

At initial power-up, the front end is configured for 230 V operation and the PTC in rush limiter permits the main storage capacitors to charge up at a controlled rate toward full operating DC bus potential. If the bus voltage is below the operating threshold for the converter, the unit will autostrap for 115 V operation.