VI-ARM™
Actual size:
2.28 x 1.45 x 0.5in
57,9 x 36,8 x 12,7mm
VI-ARMx1xx
VI-ARMBx2xx
®
S
C
US
C
NRTL
US
Autoranging Rectifier Modules Up to 1500 Watts
Features & Benefits
•
RoHS Compliant
(with F or G pin option)
•
Autoranging input
•
Microprocessor controlled
•
VI-ARM-C1:
■
■
500W @ 90 – 132V
AC
750W @ 180 – 264V
AC
•
VI-ARMB-C2:
■
■
750W @ 115V
AC
1500W @ 230V
AC
•
96 – 98% efficiency
•
100°C baseplate (no derating)
•
cULus, cTÜVus, CE Marked
•
AC Bus OK, module enable
•
Inrush limiting (no external circuitry)
•
CE Marked
Typical Applications:
systems requiring a rugged,
full featured interface to the AC mains in the
smallest possible package.
Absolute Maximum Ratings
Parameter
L to N
+OUT to –OUT
B OK to –OUT
EN to –OUT
Output power
VI-ARM
VI-ARMB
Mounting torque
Operating temperature
Storage temperature
Pin soldering temperature
Rating
264
280
400
16
16
500/750
750/1500
4 – 6 (0.45 – 0.68)
–40 to +100
–55 to +125
500 (260)
750 (390)
Unit
V
AC
V
AC
V
DC
V
DC
V
DC
Watts
Watts
in-lbs (N-m)
°C
°C
°F (°C)
°F (°C)
115/230V
115/230V
See page 3 for derating
6 each, 4-40 screw
H-Grade
H-Grade
<5sec; wave solder
<7sec; hand solder
Notes
100ms
Thermal Resistance Capacity
Parameter
Baseplate to sink
flat, greased surface
with thermal pad (P/N 16495)
Baseplate to ambient
free convection
1000LFM
Thermal capacity
Min
Typ
0.24
0.3
15
2.7
48
Max
Unit
°C/Watt
°C/Watt
°C/Watt
°C/Watt
Watt-sec/°C
Product Highlights
The ARM (Autoranging Rectifier Module)
is an AC front end module which provides
autoranging line rectification and inrush
current limiting. The ARM is available in either
500/750W or 750/1500W models in a quarter
brick package measuring only
2.28” x 1.45” x 0.5”.
The ARM interfaces directly with worldwide
AC mains and may be used with Vicor
300V input DC-DC converters to realize
an autoranging, high density, low profile
switching power supply. The ARM includes
a microcontroller that continuously monitors
the AC line to control bridge/doubler
operation. The user need only provide
external capacitance to satisfy system
hold-up requirements.
Vicor Micro series packaging technology
offers flexible mounting options for various
manufacturing processes. The ARM may be
installed as a conventional leaded device
for on-board applications, in-board for
low profile, height restricted applications,
socketed or surface mounted with optional
ModuMate interconnect products.
VI-ARM™
Page 1 of 11
Part Numbering
VI- ARM
VI-ARMB
Product
-
-
C
C
1
2
2
1
3
Product Grade Temperatures (°C)
Grade Operating
Storage
E
= –10 to +100 –40 to +125
C
= –20 to +100 –40 to +125
T
= –40 to +100 –40 to +125
H
= –40 to +100 –55 to +125
Pin Style
1
= Short
2
= Long
S
= Short Modumate
[1]
N
= Long Modumate
[1]
F
= Short RoHS
[1]
G
= Long RoHS
[1]
K
= Extra Long RoHS
[2]
Baseplate
Blank
= Slotted
2
= Threaded
3
= Through hole
[1]
[2]
Pin styles S, N, F & G are compatible with the ModuMate interconnect system for socketing
and surface mounting
Not intended for socket or Surfmate mounting
Rev 4.9
06/2017
vicorpower.com
800 927.9474
VI-ARMx1xx
Electrical Characteristics
Electrical characteristics apply over the full operating range of input voltage, output load (resistive) and baseplate temperature, unless otherwise specified. All
temperatures refer to the operating temperature at the center of the baseplate. Specifications apply for AC mains having up to 5% total harmonic distortion.
INPUT SPECIFICATIONS
VI-ARM - 1
Parameter
Operating input voltage
Input undervoltage
Input surge withstand
AC line frequency
Input current, RMS
Power factor
47
47
0
0
0.60
Min
90
180
Typ
Max
132
264
90
280
63
880
7.4
5.4
47
47
0
0
0.60
Min
90
180
VI-ARMB - 2
Typ
Max
132
264
90
280
63
880
11.1
7.2
Unit
V
AC
V
AC
V
AC
V
AC
Hz
Hz
Amps
Amps
Notes
Autoranging (doubler mode)
Autoranging (bridge mode)
No damage
100ms
C, E-Grade
T & H-Grade
120V
AC
240V
AC
Dependent on line source
impedence, holdup
capacitance, and load
30
2400
Amps
µF
264V
AC
peak line,
cold start
Inrush current
Holdup Capacitance
30
1600
OUTPUT SPECIFICATIONS
VI-ARM - 1
Parameter
Output power
Efficiency
120V
AC
240 V
AC
Output voltage
Min
0
0
94
96
200
96
98
375
Typ
Max
500
750
Min
0
0
94
96
200
96
98
375
VI-ARMB - 2
Typ
Max
750
1500
Unit
Watts
Watts
%
%
V
DC
90 – 264V
AC
Notes
105 – 132V
AC
(Fig. 1)
210 – 264V
AC
(Fig. 2)
CONTROL PIN SPECIFICATIONS
Parameter
AC Bus OK (B OK)
On-state resistance (low)
On-state current (low)
Off-state voltage
On-state threshold
Off-state threshold
Module Enable (EN)
On-state resistance (low)
On-state current (low)
Off-state voltage
On-state threshold
Off-state threshold
Over voltage shutdown
AC Bus OK - module enable,
differential error*
Min
Typ
Max
15
-50
16
245
210
15
50
16
245
195
400
16
Unit
Ω
mA
V
DC
V
DC
V
DC
Ω
mA
V
DC
V
DC
V
DC
V
DC
V
DC
AC Bus OK and module enable thresholds track
Notes
To negative output - bus normal
Bus normal
Bus abnormal, 27kΩ internal pull up to 15V
DC
(Fig. 12)
Output bus voltage
Output bus voltage
To negative output - converters are disabled
150kΩ internal pull up to 15V
DC
(Fig. 11)
Output bus voltage
Output bus voltage
12
235
200
14
240
205
12
235
185
380
12
14
240
190
390
14
* Tracking error between BUS OK and Enable thresholds
VI-ARM™
Page 2 of 11
Rev 4.9
06/2017
vicorpower.com
800 927.9474
VI-ARMx1xx
Electrical Characteristics (Cont.)
SAFETY SPECIFICATIONS
Parameter
Isolation voltage (IN to OUT)
Dielectric withstand
(I/O to baseplate)
Leakage current
1,500
100
Min
Typ
None
V
RMS
µA
No filter
Max
Unit
Notes
Isolation provided by DC-DC converter(s)
AGENCY APPROVALS
Safety Standards
ARM1 xxx
UL60950, EN60950, CSA 60950
Agency Markings
Notes
Baseplate earthed, fast acting line fuse,
Bussman ABC10
Low voltage directive
Baseplate earthed, fast acting line fuse,
Bussman ABC15
Low voltage directive
cTÜVus
CE Marked
ARM2 xxx
UL60950, EN60950, CSA 60950
cTÜVus
CE Marked
GENERAL SPECIFICATIONS
Parameter
1500
1480
MTBF
1460
1440
Baseplate material
1420
1400
Cover
1380
1360
Pin material
1340
1320
1300
Weight
1280
1260
180
190
Size
1520
Min
Typ
>1,000,000
Max
Unit
hours
Notes
25˚C, ground benign
Aluminum
Kapton insulated aluminum, plastic molded terminal blocks
Copper, tin/lead solder dipped (solder pins)
Gold plated nickel copper (Modumate and RoHS)
Output Power (Watts)
1.6 (45)
200
210
220
230
ounces (grams)
inches
(mm)
Input Voltage (AC)
2.28 x 1.45 x 0.5
240
250
260
(57,9 x 36,8 x 12,7)
VI-ARMB DERATING
760
750
740
730
720
710
700
690
680
670
660
650
640
630
90
95
100
105
110
115
120
125
130
1520
1500
1480
1460
1440
1420
1400
1380
1360
1340
1320
1300
1280
1260
180
190
200
210
220
230
240
250
260
Output Power (Watts)
Input Voltage (AC)
Output Power (Watts)
Input Voltage (AC)
Figure 1 —
90 – 130V
AC
ARMB output power rating
VI-ARM™
Page 3 of 11
Rev 4.9
06/2017
Figure 2 —
180 – 260V
AC
ARMB output power rating
vicorpower.com
800 927.9474
760
750
740
730
720
atts)
VI-ARMx1xx
Operating Characteristics
V
DC
output
V
DC
output
Strap
Engaged
fi
Enable
Enable
B OK
B OK
Enable
Figure 3 —
Start up at 120V
AC
input
Figure 4 —
Start up at 240V
AC
input
V
DC
output
I
AC
input @2A/mV
V
DC
output
I
AC
input @2A/mV
Enable
Enable
B OK
B OK
Figure 5 —
Power down, from 120V
AC
Figure 6 —
Power down, from 240V
AC
V
DC
output
Enable
B OK
Figure 7 —
Output overvoltage protection 240V
AC
range
VI-ARM™
Page 4 of 11
Rev 4.9
06/2017
vicorpower.com
800 927.9474
VI-ARMx1xx
Application Note
The VI-ARM Autoranging Rectifier Module (ARM) provides an
effective solution for the AC front end of a power supply designed
with Vicor DC-DC converters. This high performance power system
building block satisfies a broad spectrum of requirements and
agency standards.
The ARM contains all of the power switching and control
circuitry necessary for autoranging rectification, inrush current
limiting, and overvoltage protection. This module also provides
converter enable and status functions for orderly power up/
down control or sequencing. To complete the AC front-end
configuration, the user needs only to add holdup capacitors and a
suitable input filter with transient protection.
Functional Description
Initial Conditions:
The switch that bypasses the inrush limiting
PTC (positive temperature coefficient) thermistor is open when
power is applied, as is the switch that engages the strap for
voltage doubling. (See Figure 8). In addition, the downstream
DC-DC modules are disabled via the Enable (EN) line, and Bus-OK
(B OK) is high.
Power-Up Sequence (See Figure 9):
1.1.
Upon application of input power, the output bus capacitors
begin to charge. The thermistor limits the charge current, and
the exponential time constant is determined by the holdup
capacitor value and the thermistor cold resistance. The slope
(dV/dt) of the capacitor voltage approaches zero as the
capacitors become charged to the peak of the
AC line voltage.
2.1.
If the bus voltage is less than 200V as the slope nears zero,
the voltage doubler is activated, and the bus voltage climbs
exponentially to twice the peak line voltage.
If the bus voltage is greater than 200V, the doubler is
not activated.
3.1.
If the bus voltage is greater than 235V as the slope approaches
zero, the inrush limiting thermistor is bypassed. Below 235V,
the thermistor is not bypassed.
4.1.
The converters are enabled ~150 milliseconds after the
thermistor bypass switch is closed.
5.1.
Bus-OK is asserted after an additional ~150 millisecond delay
to allow the converter outputs to settle within
specification.
Power-Down Sequence:
(See Figure 9). When input power
is turned off or fails, the following sequence occurs as the bus
voltage decays:
1.2.
Bus-OK is deasserted when the bus voltage falls below
205V
DC
(Typ).
2.2.
The converters are disabled when the bus voltage falls below
200V
DC
. If power is reapplied after the converters are disabled,
the entire power-up sequence is repeated. If a momentary
power interruption occurs and power is reestablished before
the bus reaches the disable threshold, the power-up sequence
is not repeated.
Power
Up
+OUT
Power
Down
90 – 132V
AC Line
400
300
200
100
0
L
PTC
Thermistor
Strap
Strap
Output
Bus
(V
DC
)
Strap
PTC
Thermistor
Bypass
Converter
Enable
Bus OK
1.1
2.1
–OUT
N
EN
Microcontroller
BOK
3.1
~150ms
~150ms
4.1
5.1
1.2
2.2
Figure 8 —
Functional block diagram
Figure 9 —
Timing diagram: power up/down sequence
VI-ARM™
Page 5 of 11
Rev 4.9
06/2017
vicorpower.com
800 927.9474
Timing Diagram, Power Up/Down Sequence
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