Data Sheet
Off-Line Front Ends
Single or Three Phase
Strappable
Features
•
250 W, 500 W, 750 W, 115/230 Vac
strappable single-phase
•
1.5, 3, 5 kW, 208 Vac three-phase
20 – 50 mS holdup
UL, CSA, TÜV, VDE, BABT
FCC/VDE Class B (single-phase)
FCC/VDE Class A (three-phase)
BUS OK, AC OK, DC OK status signal
96 – 98% efficiency
PC and chassis mount
•
Front End Specifications
(typical at T = 25˚C, nominal line, 75% load, unless otherwise specified)
•
•
Single Phase (250, 500, 750W)
Three Phase (1.5, 3, 5 kW)
•
AC Line Input
Strappable 115/230 Vac
208 Vac +20%/–10%
(Wye or Delta, ø to ø)
N/A
•
•
With Range Strap
Without Range Strap
Line Frequency
90 Vac to 135 Vac
180 Vac to 270 Vac
47 to 63 Hz (C-Grade)
47 to 440 Hz (I-Grade)
N/A
•
47 to 63 Hz (C-Grade)
47 to 440 Hz (I-Grade)
•
VI-26X, VI-J6X series compatible
CE Marked
•
Line Inrush Current
115 Vac Operation
230 Vac Operation
240 Vac Operation
35 A at peak line
67 A at peak line
52 A at peak line
Product Highlights
AC Leakage Current
1.9 mA max. at 250 Vac,
63 Hz (C- Grade)
3.2 mA max. at 208 Vac, 63 Hz
From AC line in, to highly regulated DC
out, Vicor offers the total design solution
through a complete family of off-line front
end and DC-DC modular power components.
Power Factor (at full load)
0.52 to 0.65 (at low line input)
0.9 (typical at nom. line)
Holdup Time (at full load)
Low Line
250 W (60 Hz): 4 ms min.
500, 750 W (60 Hz): 7 ms min.
250 W (60 Hz): 27 ms min.
500, 750 W (60 Hz): 29 ms. min.
Nominal Line
20 ms min. (47 Hz)
5 ms min.
Vicor’s family of off-line front ends
AC Fail Warning Time
(at full load)
250W: None
500, 750W: 6 ms min.
interface VI-260 and VI-J60 series DC-DC
converters, and MegaMods, to 100, 115,
230 or 240 Vac single-phase and 208 Vac
three-phase mains. In addition, front ends
provide conducted EMI/RFI filtering to
FCC/VDE (Class B single-phase, Class A
three-phase), transient surge protection,
active inrush limiting, a BUS OK status
output (suitable for controlling Vicor
DC-DC converter modules via their Gate In
pin) and an AC OK status output for sys-
tem use in the event of loss of the AC line.
Module Gate Control Output
(open drain FET, non-isolated,
referenced to –DC output)
Called BUS OK
Called Module Enable
ENABLE Active High (FET cutoff) Active High (FET cutoff)
Vds max. 18 V transorb clamp
Power up threshold DC bus:
Power-up threshold >227 V
Vds max: 15 V zener clamp
250 W: 216 V, 12%
500, 750 W: 244, 3.5%
ENABLE
Inactive state (DC BUS <190 V 5%)
Current sinking 100 mA @
.3 Vds max., threshold DC bus
250 W: 172 V, 16%
Inactive state (DC BUS <187 Vdc)
Current sinking 100 mA @
.3Vds max.
500, 750 W: 175 V, 3.5%
AC OK and BUS OK Status
Outputs (optically isolated,
transistor output; 500 W,
750 W only)
500, 750 W only
AC OK and BUS OK
70 Vce max.
Operating Temperature
(Free Convection)
C: 0°C to +50°C (750 W: +45°C)
I: -20°C to +50°C (750 W: +45°C)
Off State Breakdown
Voltage
70 Vce max.
On State Voltage
On State Current
On State Threshold
(no load)
Off State Threshold
(load dependent)
.4 Vce (sat.) max. at 1 mA
15 mA max.
80 – 89 Vac
.4 Vce (sat.) max. at 1 mA
15 mA max.
>210 Vdc/187 Vac
Storage Temperature
85 – 76Vac
<205 Vdc/<182 Vac
-40°C to +80°C
Conducted EMI/RFI
Dielectric Withstand
VDE 0871/FCC part 15, Class B
AC line (both phases)
to GND or case
VDE 0871/FCC part 15, Class A
AC line (all phases)
to GND orcase
1.5 kVAC; 2121 Vdc
1.5 kVAC; 2121 Vdc
Transient Surge Withstand
Capability (with no
disruption of function)
Common Mode
IEC 61000-4-5, Level 3
IEC 61000-4-5, Level 3
1.2/50 µs, 2 kV,
either polarity
1.2/50 µs, 2 kV,
either polarity
0 to 360 degree phase angle with
respect to AC line
0 to 360 degree phase angle with
respect to AC line
Normal Mode
1.2/50 µs, 1 kV pulse,
either polarity
1.2/50 µs, 1 kV pulse,
either polarity
0 to 360 degree phase angle with
respect to AC line
0 to 360 degree phase angle with
respect to AC line
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
Off-Line Front Ends
Rev.1.3
Page 1 of 5
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