VI-ARM-H1N2 [VICOR]

AC-DC Unregulated Power Supply Module, 1 Output, 750W, Hybrid, QUARTER BRICK PACKAGE-7;
VI-ARM-H1N2
型号: VI-ARM-H1N2
厂家: VICOR CORPORATION    VICOR CORPORATION
描述:

AC-DC Unregulated Power Supply Module, 1 Output, 750W, Hybrid, QUARTER BRICK PACKAGE-7

文件: 总11页 (文件大小:736K)
中文:  中文翻译
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Data Sheet  
VI-ARMTM  
Autoranging Rectifier Modules  
Up to 1500 Watts  
Features  
RoHS Compliant (with F or G pin option)  
Autoranging input  
Microprocessor controlled  
VI-ARM-C1:  
500 W @ 90 – 132 Vac  
750 W @ 180 – 264 Vac  
Actual size:  
2.28 x 1.45 x 0.5 in  
57,9 x 36,8 x 12,7 mm  
VI-ARMB-C2:  
750 W@ 115 Vac  
1500 W @ 230 Vac  
Absolute Maximum Ratings  
Parameter  
Rating  
264  
Unit  
Vac  
Vac  
Vdc  
Notes  
96 – 98% efficiency  
L to N  
100˚C baseplate (no derating)  
cULus, cTÜVus, CE Marked  
AC Bus OK, module enable  
Inrush limiting (no external circuitry)  
CE Marked  
280  
100 ms  
+Out to Out  
B OK to Out  
EN to Out  
400  
16  
16  
Vdc  
Vdc  
Output power  
VI-ARM  
500/750  
Watts  
Watts  
115/230 V  
115/230 V  
See page 3 for derating  
Typical Applications: systems requiring a  
rugged, full featured interface to the AC  
mains in the smallest possible package.  
VI-ARMB  
750/1500  
Mounting torque  
4 – 6 (0.45 – 0.68)  
40 to +100  
in-lbs (N-m)  
6 each, 4-40 screw  
H-Grade  
Operating temperature  
Storage temperature  
°C  
Product Highlights  
55 to +125  
500 (260)  
750 (390)  
°C  
H-Grade  
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 500/750 W or 750/1500 W models in a  
quarter brick package measuring only  
2.28" x 1.45" x 0.5".  
°F (°C)  
°F (°C)  
<5 sec; wave solder  
<7 sec; hand solder  
Pin soldering temperature  
Thermal Resistance Capacity  
Parameter  
Baseplate to sink  
Min  
Typ  
Max  
Unit  
flat, greased surface  
0.24  
0.3  
°C/Watt  
°C/Watt  
with thermal pad (P/N 16495)  
The ARM interfaces directly with worldwide  
AC mains and may be used with Vicor  
300 V 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.  
Baseplate to ambient  
free convection  
15  
2.7  
48  
°C/Watt  
1000 LFM  
°C/Watt  
Thermal capacity  
Watt-sec/°C  
Part Numbering  
VI- ARM - C  
1
2
2
1
3
VI-ARMB - C  
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.  
Product  
Product Grade Temperatures (°C)  
Grade Operating  
Pin Style**  
1 = Short  
2 = Long  
S = Short Modumate  
N = Long Modumate  
F = Short RoHS  
Baseplate  
Blank = Slotted  
2 = Threaded  
3 = Through hole  
Storage  
E
C
T
=
=
=
=
10 to +100  
20 to +100  
40 to +100  
40 to +100  
40 to +125  
40 to +125  
40 to +125  
55 to +125  
H
G = Long RoHS  
**Pin styles S, N, F & G are compatible with the ModuMate interconnect system for socketing and surface mounting.  
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715  
ARM, Autoranging Rectifier Module  
Rev. 4.2  
Page 1 of 11  
Set your site on VICOR at vicorpower.com  
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  
Typ  
VI-ARMB - 2  
Typ  
Parameter  
Min  
Max  
Min  
Max  
Unit  
Notes  
90  
132  
90  
132  
Vac  
Autoranging (doubler mode)  
Operating input voltage  
180  
264  
180  
264  
Vac  
Autoranging (bridge mode)  
Input undervoltage  
90  
90  
Vac  
Vac  
No damage  
Input surge withstand  
280  
280  
100 ms  
47  
47  
0
63  
880  
7.4  
5.4  
47  
47  
0
63  
880  
11.1  
7.2  
Hz  
Hz  
C, E-Grade  
T & H-Grade  
120 Vac  
AC line frequency  
Input current, rms  
Power factor  
Amps  
Amps  
0
0
240 Vac  
Dependent on line source  
impedence, holdup  
0.60  
0.60  
capacitance, and load  
264 Vac peak line,  
cold start  
Inrush current  
30  
30  
Amps  
Holdup Capacitance  
1600  
2400  
F  
OUTPUT SPECIFICATIONS  
VI-ARM - 1  
Typ  
VI-ARMB - 2  
Typ  
Parameter  
Min  
Max  
Min  
Max  
Unit  
Notes  
0
0
500  
750  
0
0
750  
Watts  
Watts  
105 – 132 Vac (Fig. 1)  
210 – 264 Vac (Fig. 2)  
Output power  
1500  
Efficiency  
120 Vac  
240 Vac  
94  
96  
96  
98  
94  
96  
96  
98  
%
%
Output voltage  
200  
375  
200  
375  
Vdc  
90 – 264 Vac  
CONTROL PIN SPECIFICATIONS  
Parameter  
Min  
Typ  
Max  
Unit  
Notes  
AC Bus OK (B OK)  
On-state resistance (low)  
On-state current (low)  
Off-state voltage  
On-state threshold  
Off-state threshold  
15  
-50  
15.2  
245  
210  
Ω
To negative output - bus normal  
Bus normal  
Bus abnormal, 27 K internal pull up to 15 Vdc (Fig. 12)  
Output bus voltage  
mA  
Vdc  
Vdc  
Vdc  
14.8  
235  
200  
15.0  
240  
205  
Output bus voltage  
Module Enable (EN)  
On-state resistance (low)  
On-state current (low)  
Off-state voltage  
On-state threshold  
Off-state threshold  
15  
50  
15.2  
245  
195  
Ω
To negative output - converters are disabled  
mA  
Vdc  
Vdc  
Vdc  
14.8  
235  
185  
15.0  
240  
190  
150 K internal pull up to 15 Vdc (Fig. 11)  
Output bus voltage  
Output bus voltage  
Over voltage shutdown  
380  
15  
390  
17  
400  
20  
Vdc  
Vdc  
AC Bus OK - module enable,  
differential error*  
AC Bus OK and module enable thresholds track  
* Tracking error between BUS OK and Enable thresholds  
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715  
ARM, Autoranging Rectifier Module  
Rev. 4.2  
Page 2 of 11  
Set your site on VICOR at vicorpower.com  
ELECTRICAL CHARACTERISTICS (CONT.)  
SAFETY SPECIFICATIONS  
Parameter  
Min  
Typ  
Max  
Unit  
Notes  
Isolation voltage (in to out)  
None  
Isolation provided by DC-DC converter(s)  
Dielectric withstand  
(I/O to baseplate)  
1,500  
VRMS  
Leakage current  
100  
A  
No filter  
AGENCY APPROVALS  
Safety Standards  
Agency Markings  
Notes  
ARM1 xxx  
UL60950, EN60950, CSA 60950  
Baseplate earthed, fast acting line fuse,  
Bussman ABC10  
cTÜVus  
CE Marked  
Low voltage directive  
ARM2 xxx  
UL60950, EN60950, CSA 60950  
Baseplate earthed, fast acting line fuse,  
Bussman ABC15  
cTÜVus  
CE Marked  
Low voltage directive  
GENERAL SPECIFICATIONS  
Parameter  
MTBF  
Min  
Typ  
>1,000,000  
Max  
Unit  
hours  
Notes  
25˚C, ground benign  
Baseplate material  
Cover  
Aluminum  
Kapton insulated aluminum, plastic molded terminal blocks  
Copper, tin/lead solder dipped (solder pins)  
Pin material  
Weight  
Gold plated nickel copper (Modumate and RoHS)  
1.6 (45)  
2.28 x 1.45 x 0.5  
(57,9 x 36,8 x 12,7)  
ounces (grams)  
inches  
(mm)  
Size  
VI-ARMB DERATING  
1520  
1500  
1480  
1460  
1440  
1420  
1400  
1380  
1360  
1340  
1320  
1300  
1280  
1260  
760  
750  
740  
730  
720  
710  
700  
690  
680  
670  
660  
650  
640  
630  
90  
95  
100  
105  
110  
115  
120  
125  
130  
180  
190  
200  
210  
220  
230  
240  
250  
260  
Input Voltage (AC)  
Input Voltage (AC)  
Figure 1 — 90 – 130 Vac ARMB output power rating  
Figure 2 — 180 – 260 Vac ARMB output power rating  
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715  
ARM, Autoranging Rectifier Module  
Rev. 4.2  
Page 3 of 11  
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OPERATING CHARACTERISTICS  
Vdc output  
Vdc output  
Strap  
Engaged  
Enable  
Enable  
Enable  
B OK  
B OK  
Figure 3 — Start-up at 120 Vac input  
Figure 4 — Start-up at 240 Vac input  
Vdc output  
Vdc output  
Iac input @2A / mV  
Iac input @2A / mV  
Enable  
Enable  
B OK  
B OK  
Figure 5 — Power down, from 120 Vac  
Figure 6 — Power down, from 240 Vac  
Vdc output  
Enable  
B OK  
Figure 7 — Output overvoltage protection 240 Vac range  
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715  
ARM, Autoranging Rectifier Module  
Rev. 4.2  
Page 4 of 11  
Set your site on VICOR at vicorpower.com  
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.  
2.1 If the bus voltage is less than 200 V 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 200 V, the doubler is  
not activated.  
3.1  
If the bus voltage is greater than 235 V as the slope  
approaches zero, the inrush limiting thermistor is  
bypassed. Below 235 V, the thermistor is not bypassed.  
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.  
4.1 The converters are enabled ~150 milliseconds after the  
thermistor bypass switch is closed.  
Bus-OK is asserted after an additional ~150 millisecond  
delay to allow the converter outputs to settle within  
specification.  
5.1  
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 Fig. 8). In addition, the  
downstream DC-DC modules are disabled via the Enable (EN)  
line, and Bus-OK (B OK) is high.  
Power-Down Sequence. (See Fig. 9). When input power is  
turned off or fails, the following sequence occurs as the bus  
voltage decays:  
Bus-OK is deasserted when the bus voltage falls below  
205 Vdc (Typ.).  
1.2  
2.2  
Power-Up Sequence. (See Fig. 9).:  
The converters are disabled when the bus voltage falls  
below 200 Vdc. 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.  
Upon application of input power, the output bus capacitors  
1.1  
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.  
Power  
Up  
Power  
Down  
+OUT  
90–132 V  
AC Line  
400  
PTC  
Thermistor  
300  
200  
100  
0
Strap  
L
Strap  
Output  
Bus  
1.1  
2.1  
(Vdc)  
–OUT  
Strap  
PTC  
N
3.1  
4.1  
5.1  
Thermistor  
EN  
Bypass  
Microcontroller  
Converter  
Enable  
2.2  
BOK  
~150 ms  
~150 ms  
Bus OK  
1.2  
Figure 8 — Functional block diagram  
Figure 9 — Timing diagram: power up/down sequence  
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715  
ARM, Autoranging Rectifier Module  
Rev. 4.2  
Page 5 of 11  
Set your site on VICOR at vicorpower.com  
APPLICATION NOTE (CONT.)  
converters would attempt to start while the holdup capacitors  
were being charged through an un-bypassed thermistor,  
preventing the bus voltage from reaching the thermistor bypass  
threshold thus disabling the power supply. The Enable output  
(the drain of an N channel MOSFET) is internally pulled up to  
15 V through a 150 kΩ resistor.  
Off-Line Power Supply Configuration  
The ARM maintains the DC output bus voltage between 200  
and 375 Vdc over the entire universal input range, this being  
compatible with Vicor VI-260 series and VI-J60 series DC-DC  
converters, as well as Vicors Maxi, Mini, Micro 300 V input  
Vicor converters. The ARM automatically switches to the  
proper rectification mode (doubled or undoubled) depending  
on the input voltage, eliminating the possibility of damage due  
A signal diode should be placed close to and in series with the  
PC/Gate-In pin of each converter to eliminate the possibility of  
control interference between converters. The Enable pin  
switches to the high state (15 V) with respect to the negative  
output power pin to turn on the converters after the power-up  
inrush is over. The Enable function also provides input  
overvoltage protection for the converters by turning off the  
converters if the DC bus voltage exceeds 400 Vdc. The  
thermistor bypass switch opens if this condition occurs,  
placing the thermistor in series with the input voltage, which  
reduces the bus voltage to a safe level while limiting input  
current in case the varistors conduct. The thermistor bypass  
switch also opens if a fault or overload reduces the bus voltage  
to less than 180 Vdc.  
-x  
to improper line connection. The VI-ARM 1 is rated at 500 W  
in the low range (90-132 Vac input), and 750 W in the high  
-x  
range (180 – 264 Vac input). The VI-ARMB 2 is rated for 750  
W and 1500 W for the low and high input ranges respectively.  
Either of these modules can serve as the AC front end for any  
number and combination of compatible converters as long as  
the maximum power rating is not exceeded. See VI-ARMB  
derating curves. (Figures 1, and 2)  
Strap (ST) Pin. In addition to input and output power pin  
connections, it is necessary to connect the Strap pin to the  
junction of the series holdup capacitors (C1, C2, Fig. 10)  
for proper (autoranging) operation. Varistors across the  
capacitors provide input transient protection. The bleeder  
CAUTION: There is no input to output isolation in the  
ARM, hence the –Out of the ARM and thus the –In of the  
downstream DC-DC converter(s) are at a high potential. If  
it is necessary to provide an external enable / disable  
function by controlling the DC-DC converter’s PC pin  
(referenced to the –In) of the converter an opto-isolator or  
isolated relay should be employed.  
resistors (R1, R2, Fig. 10) discharge the holdup capacitors  
when power is switched off.  
Enable (EN) Pin. (See Fig. 11). The Enable pin must be  
connected to the Gate-In or PC pin of all converter modules to  
disable the converters during power-up. Otherwise, the  
C3  
F1  
R1 C1  
+IN  
N
N
+V  
C10  
V1  
V2  
PC (GATE IN)  
C7*  
C8*  
BOK  
EN  
Vicor DC-DC  
Converter  
Filter  
VI-ARM  
Z1  
ST  
L
D3  
F3  
PR  
L
–V  
–IN  
R2 C2  
PE  
C4  
Part  
Description  
Vicor Part Number  
R3  
C1,2  
Holdup capacitors  
4700pF (Y2 type)  
150 k, 0.5 W  
C3–6  
R1,2  
V1,2  
F1,2  
01000  
C5  
00127-1503  
30234-220  
D1  
D2  
220 V MOV  
Use reccommended fusing for  
specific DC-DC Converters  
F2  
+IN  
D1,2  
Diode  
00670  
34610  
30076  
26108  
R4  
C11  
C7,8*  
Z1  
Film Cap., 0.61 µF  
MOV (270 V)  
1N5817  
PC (GATE IN)  
Vicor DC-DC  
Converter  
D3,D4  
C10,C11  
R3, R4**  
F3  
D4  
0.001 µF  
PR  
250 Ω  
–IN  
ABC-10 A VI-ARM-_1  
ABC-10 A VI-ARMB-_2  
Not used with VI-260/VI-J60  
Sizing PCB traces:  
All traces shown in bold carry significant  
current and should be sized accordingly.  
C6  
*Required if C1 & C2 are located more than  
6 inches (15 cm) from output of VI-ARM.  
**Not used with VI-260/VI-J60  
To additional modules  
Figure 10 — Converter connections  
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715  
ARM, Autoranging Rectifier Module  
Rev. 4.2  
Page 6 of 11  
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APPLICATION NOTE (CONT.)  
Bus-OK (B OK) Pin. (See Fig. 12). The Bus-OK pin is  
intended to provide early-warning power fail information  
and is also referenced to the negative output pin.  
Not used with VI-260/VI-J60  
+IN  
PC (GATE IN)  
Vicor  
+V  
15 Vdc  
N
Caution: There is no input-to-output isolation in the  
ARM. It is necessary to monitor Bus-OK via an  
optoisolator if it is to be used on the secondary (output)  
side of the converters. A line isolation transformer  
should be used when performing scope measurements.  
Scope probes should never be applied simultaneously to  
the input and output as this will destroy the module.  
DC-DC  
BOK  
EN  
Converter  
C
ST  
L
Micro-  
controller  
PR  
–V  
–IN  
To additional modules  
Filter. Two input filter recommendations are shown for low  
power VI-ARM-x1 and high power VI-ARMB-x2 (See Fig. 13).  
Both filter configurations provide sufficient common mode and  
differential mode insertion loss in the frequency range between  
100 kHz and 30 MHz to comply with the Level B conducted  
emissions limit.  
Figure 11 — Enable (EN) function; See Fig.8 for details  
+IN  
+5 Vdc  
Hold-up Capacitors. Hold-up capacitor values should be  
determined according to output bus voltage ripple, power fail  
hold-up time, and ride-through time. (See Fig. 14). Many  
applications require the power supply to maintain output  
regulation during a momentary power failure of specified  
duration, i.e., the converters must hold-up or ride-through such  
an event while maintaining undisturbed output voltage  
regulation. Similarly, many of these same systems require  
notification of an impending power failure in order to allow time  
to perform an orderly shutdown.  
PC  
+V  
15 Vdc  
N
Vicor  
DC-DC  
Secondary  
referenced  
BOK  
EN  
Converter  
ST  
L
Micro-  
controller  
PR  
–V  
–IN  
To additional modules  
Figure 12 — Bus OK (B OK) isolated power status indicator  
The energy stored on a capacitor which has been charged to  
voltage V is:  
R1  
L3  
C2  
N
L2/N  
L1  
L2  
R4  
R3  
Z1  
C1  
ST  
L
ε = 1/2(CV2)  
(1)  
L1  
F1  
C3  
C4  
GND  
R2  
Where: ε = stored energy  
C = capacitance  
Part  
C1  
Description  
1.0 µF  
Vicor Part Number  
02573  
V = voltage across the capacitor  
C2, C3  
C4  
F1  
L1, L2  
L3  
R1, R2  
R3  
4700pF (Y2 type)  
0.15µF  
10 A Max  
27 µH  
1.3 mH  
10 Ω  
150 kΩ, 0.5 W  
2.2 Ω  
MOV  
03285  
03269  
05147  
32012  
Low power filter  
connections  
32006  
Energy is given up by the capacitors as they are discharged by  
the converters. The energy expended (the power-time product)  
is:  
R4  
Z1  
30076  
R2  
2
2
L2/N  
N
ε = PΔt = C(V1 –V2 ) / 2  
(2)  
C4  
C3  
C2  
L3  
R1  
Z1  
C1  
C6  
ST  
C5  
L1  
Where: P = operating power  
L
L4  
L1  
F1  
L2  
Δt = discharge interval  
GND  
V1 = capacitor voltage at the beginning of Δt  
V2 = capacitor voltage at the end of Δt  
Part  
L1,L4  
L2, L3  
C1  
Description  
1,000 µH 12 A / 6.5 MΩ 31743  
22 µH  
0.68 µF (X type)  
4700pF (Y2 type)  
0.22 µF (X type)  
390 kΩ 1/2 W  
10 Ω 1/2 W  
15 A Max  
Vicor Part Number  
33206  
02573  
03285  
04068  
High power filter  
connections  
C2,C3,C4,C5  
C6  
R1  
R2  
F1  
Z1  
Rearranging equation 2 to solve for the required capacitance:  
MOV  
30076  
2
2
C = 2PΔt / (V1 –V2 )  
(3)  
Figure 13 — Filter connections  
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715  
ARM, Autoranging Rectifier Module  
Rev. 4.2  
Page 7 of 11  
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APPLICATION NOTE (CONT.)  
Hold-up Time  
Power Fail  
Warning  
Ripple (V p-p)  
π θ  
θ
254 V  
205 V  
190 V  
Ride-Through Time  
Bus OK  
Power  
Converter  
Fail  
Shut down  
Figure 14 — Hold-up time  
The power fail warning time (Δt) is defined as the interval  
between (B OK) and converter shutdown (EN) as illustrated in  
Fig. 12. The Bus-OK and Enable thresholds are 205 V and  
190 V, respectively. A simplified relationship between power  
fail warning time, operating power, and bus capacitance is  
obtained by inserting these constants:  
40  
35  
30  
25  
20  
15  
10  
5
820 μF  
1,600 μF  
680 μF (VI-ARM-x1)  
1,100 μF  
1,300 μF  
2,200 μF(VI-ARMB-x2)  
C = 2PΔt / (2052 – 1902)  
C = 2PΔt / (5,925)  
It should be noted that the series combination (C1, C2, Fig. 10)  
requires each capacitor to be twice the calculated value,  
but the required voltage rating is reduced to 200 V.  
0
250  
500  
750  
1000  
1250  
1500  
Operating Power (W)  
Allowable ripple voltage on the bus (or ripple current in the  
capacitors) may define the capacitance requirement.  
Consideration should be given to converter ripple rejection and  
resulting output ripple voltage.  
Figure 15 — Power fail warning time vs. operating power and  
total bus capacitance, series combination of C1, C2 (Fig. 10)  
For example, a converter whose output is 15 V and nominal  
input is 300 V will provide 56 dB ripple rejection, i.e., 10 V p-p  
of input ripple will produce 15 mV p-p of output ripple. (See  
Fig. 18) Equation 3 is again used to determine the required  
capacitance. In this case, V1 and V2 are the instantaneous  
values of bus voltage at the peaks and valleys (see Fig. 14) of  
the ripple, respectively. The capacitors must hold up the bus  
voltage for the time interval (Δt) between peaks of the rectified  
line as given by:  
100  
90  
Total  
capacitance  
820 μF  
80  
70  
60  
50  
40  
30  
20  
10  
0
90 Vac  
115 Vac  
Δt = (π θ) / 2πf  
(4)  
Where: f = line frequency  
θ = rectifier conduction angle  
250  
500  
750  
1000  
1250  
1500  
Operating Power (W)  
Figure 16 — Ride-through time vs. operating power  
The approximate conduction angle is given by:  
θ = Cos-1V2/V1  
(5)  
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715  
ARM, Autoranging Rectifier Module  
Rev. 4.2  
Page 8 of 11  
Set your site on VICOR at vicorpower.com  
APPLICATION NOTE (CONT.)  
Example  
30  
25  
20  
15  
10  
5
In this example, the output required at the point of load is 12  
Vdc at 320 W. Therefore, the output power from the ARM  
would be 375 W (assuming a converter efficiency of 85%). The  
desired hold-up time is 9 ms over an input range of 90 to 264 Vac.  
Determining Required Capacitance for Power Fail  
Warning. Fig. 15 is used to determine hold-up capacitance  
for a given power fail warning time and power level, and  
shows that the total bus capacitance must be at least 820 µF.  
Since two capacitors are used in series, each capacitor must  
be at least 1,640 µF.  
820 μF  
680 μF (VI-ARM-x1)  
1,100 μF  
1,300 μF  
1,600 μF  
2,200 μF(VI-ARMB-x2)  
0
250  
500  
750  
1000  
1250  
1500  
Operating Power (W)  
Note: The warning time is not dependent on line voltage. A  
hold-up capacitor calculator is available on the Vicor website,  
at vicorpower.com/hubcalc.  
Figure 17 — Ripple voltage vs. operating power and bus  
capacitance, series combination of C1, C2 (see Fig. 10)  
Determining Ride-through Time. Figure 16 illustrates ride-  
through time as a function of line voltage and output power,  
and shows that at a nominal line of 115 Vac, ride-through  
would be 68 ms. Ride-through time is a function of line  
voltage.  
80  
75  
70  
65  
60  
55  
50  
45  
40  
Determining Ripple Voltage on the Hold-up Capacitors.  
Fig. 17 is used to determine ripple voltage as a function of  
operating power and bus capacitance, and shows that the  
ripple voltage across the hold-up capacitors will be 12 Vac.  
Determining the Ripple on the Output of the  
DC-DC Converter. Fig. 18 is used to determine the ripple  
rejection of the DC-DC converter and indicates a ripple  
rejection of approximately 60 dB for a 12 Volt output. If the  
ripple on the bus voltage is 12 Vac and the ripple rejection of  
the converter is 60 dB, the output ripple of the converter due  
to ripple on its input (primarily 120 Hz) will be 12 mV p-p.  
Note that Maxi, Mini, Micro converters have greater ripple  
rejection then either VI-200s or VI-J00s.  
2
5
15  
30  
50  
Output Voltage  
Figure 18 — Converter ripple rejection vs. output voltage (typical)  
Another consideration in hold-up capacitor selection is their  
ripple current rating. The capacitors’ rating must be higher  
than the maximum operating ripple current. The approximate  
operating ripple current (rms) is given by:  
For more information about designing an autoranging AC  
input power supply using the ARM and Vicor DC-DC  
converter modules, contact Vicor Applications Engineering at  
the nearest Vicor Technical Support Center (see back cover),  
or send an E-mail to apps@vicorpower.com.  
Irms = 2P/Vac  
(6)  
Where: P = operating power level  
Vac = operating line voltage  
• • •  
Calculated values of bus capacitance for various hold-up time,  
ride-through time, and ripple voltage requirements are given  
as a function of operating power level in Figures 15, 16, and  
17, respectively.  
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715  
ARM, Autoranging Rectifier Module  
Rev. 4.2  
Page 9 of 11  
Set your site on VICOR at vicorpower.com  
MECHANICAL DRAWINGS  
Module Outline  
Converter Pins  
No. Function Label  
1
2
3
4
5
6
7
–Out  
–V  
Enable  
EN  
Bus OK B OK  
+Out  
Neutral  
Strap  
Line  
+V  
N
ST  
L
PCB Mounting Specifications  
0.062 0.010  
1,57 0,25  
PCB THICKNESS  
ALL MARKINGS  
THIS SURFACE  
0.800*  
20,32  
INBOARD  
SOLDER  
MOUNT  
ONBOARD  
SOLDER  
MOUNT  
0.525*  
13,34  
PLATED  
THRU HOLE  
DIA  
0.275*  
6,99  
SHORT PIN STYLE  
0.094 0.003  
LONG PIN STYLE  
0.094 0.003  
(7X)  
0.145*  
3,68  
2,39 0,08  
2,39 0,08  
0.133  
3,38  
ALUMINUM  
BASEPLATE  
1
7
2
3
4
5
PINS STYLES  
SOLDER:TIN/LEAD PLATED  
MODUMATE: GOLD PLATED COPPER  
RoHS: GOLD PLATED COPPER  
1.734**  
44,04  
2.000*  
50,80  
6
Unless otherwise specified,  
dimensions are in inches  
mm  
0.06  
1,5  
R
(4X)  
Decimals  
Tol.  
Angles  
0.53  
13,5  
0.43  
10,9  
.400*  
10,16  
0.003  
0,08  
0.XX  
0.01  
0,25  
0.005  
0,127  
*DENOTES TOL =  
**PCB WINDOW  
1°  
1.090**  
27,69  
0.XXX  
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715  
ARM, Autoranging Rectifier Module  
Rev. 4.2  
Page 10 of 11  
Set your site on VICOR at vicorpower.com  
Warranty  
Vicor products are guaranteed for two years from date of shipment against defects in material or workmanship when in normal  
use and service. This warranty does not extend to products subjected to misuse, accident, or improper application or  
maintenance. Vicor shall not be liable for collateral or consequential damage. This warranty is extended to the original  
purchaser only.  
EXCEPT FOR THE FOREGOING EXPRESS WARRANTY, VICOR MAKES NO WARRANTY, EXPRESS OR IMPLIED,  
INCLUDING, BUT NOT LIMITED TO, THE WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR  
PURPOSE.  
Vicor will repair or replace defective products in accordance with its own best judgement. For service under this warranty, the  
buyer must contact Vicor to obtain a Return Material Authorization (RMA) number and shipping instructions. Products  
returned without prior authorization will be returned to the buyer. The buyer will pay all charges incurred in returning the  
product to the factory. Vicor will pay all reshipment charges if the product was defective within the terms of this warranty.  
Information published by Vicor has been carefully checked and is believed to be accurate; however, no responsibility is  
assumed for inaccuracies. Vicor reserves the right to make changes to any products without further notice to improve reliability,  
function, or design. Vicor does not assume any liability arising out of the application or use of any product or circuit; neither  
does it convey any license under its patent rights nor the rights of others. Vicor general policy does not recommend the use of  
its components in life support applications wherein a failure or malfunction may directly threaten life or injury. Per Vicor Terms  
and Conditions of Sale, the user of Vicor components in life support applications assumes all risks of such use and indemnifies  
Vicor against all damages.  
Vicor’s comprehensive line of power solutions includes high density AC-DC  
and DC-DC modules and accessory components, fully configurable AC-DC  
and DC-DC power supplies, and complete custom power systems.  
Information furnished by Vicor is believed to be accurate and reliable. However, no responsibility is assumed by Vicor for its  
use. Vicor components are not designed to be used in applications, such as life support systems, wherein a failure or  
malfunction could result in injury or death. All sales are subject to Vicor’s Terms and Conditions of Sale, which are available  
upon request.  
Specifications are subject to change without notice.  
Intellectual Property Notice  
Vicor and its subsidiaries own Intellectual Property (including issued U.S. and Foreign Patents and pending patent  
applications) relating to the products described in this data sheet. Interested parties should contact Vicor's Intellectual  
Property Department.  
Vicor Corporation  
25 Frontage Road  
Andover, MA, USA 01810  
Tel: 800-735-6200  
Fax: 978-475-6715  
email  
Customer Service: custserv@vicorpower.com  
Technical Support: apps@vicorpower.com  
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715  
ARM, Autoranging Rectifier Module  
Rev. 4.2  
11/10  
Set your site on VICOR at vicorpower.com  

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