I & II Power Supply
Power Factor Corrected AC-DC Switcher
Overview
The Javelin is a ruggedized, switching power supply that combines the advantages of power factor correction
and power density with user-selectable output voltage and power. Accepting input voltages of 85 to 254 VAC
and 85 to 380 VDC, the Javelin can provide up to 1800 watts in a 4.9
H x 7.0
W x 10.75
L (9.5
L for Javelin
II) package. Its inherent flexibility comes from its use of Vicor 2
nd
Generation DC-DC converters. Javelin I has
a 100 CFM fan installed, while Javelin II utilizes customer-provided forced-air cooling.
Standard Features
Power Factor Correction: .99 at 115 VAC; .95 at 230 VAC.
Universal Input: 85-254 VAC, 47-500 Hz, or 85-380 VDC.
Power Output: 1800W at 230 VAC for selected outputs; 800W at 115 VAC (See Graph 1, Pg 13, for
breakdown of input voltage vs. output power).
Full power to 55
C; half power at 70
C . (See Graph 2, Pg 14 for breakdown of output power vs. ambient
temperature.)
Soft start for limiting inrush current.
EMI Compliance: FCC Class A; EN 55022 Class A & B; MIL-STD-461E.
Transient Protection: MIL-STD-704E.
Environmental: MIL-STD-810E.
MIL-STD-1399 (300A); 115VAC, 60Hz, single phase;
1KVA
5KVA.
Harmonic Distortion to EN61000-3-2.
AC Power OK status signal.
Fan cooled (Javelin I only, Javelin II requires 100 CFM to be provided by customer).
Equipped with Auto-Sense.
Output overcurrent, overvoltage and overtemperature protection.
Ride-through (holdup) time:
20 ms at 1200W load.
Size: 4.9
H x 7.0
W x 10.75
L (9.5
L for Javelin II).
Heavy-duty “ruggedized” enclosure designed for a high shock and vibration environment.
Extra cooling provided for higher output with increased altitude capability.
“D” shell connectors for input and interface connections.
Technical Description
The Javelin consists of a DC or off-line single phase power-factor-corrected front end, with an EMI filter, cool-
ing fan (Javelin I), customer interface, associated housekeeping circuits, and a selection of Vicor’s DC-DC con-
verters.
Input DC or AC mains voltage is applied to a 3-pin power connector. The input current is passed through an
EMI filter designed to meet conducted noise limit specification EN55022, level A and B.
At start-up, inrush current is limited by a PTC thermistor. The PTC is shunted out shortly after initial power-up
by a DC bus voltage sense circuit driving a thyristor. After rectification, the input voltage is put through a
boost converter that keeps the AC input current sinusoidal and synchronized with the input AC voltage (in
compliance with EN61000-3-2). The boost converter delivers a regulated input to the hold-up capacitors and a
high voltage backplane. The backplane supplies power to the DC-DC converters that provide the desired low
voltage, regulated output.
Rev. 05/11/2012 Mission Power Solutions (760) 631-6846 [email protected] Pg. 4
Javelin I & II Power Supply Operator’s Manual
