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PRELIMINARY
45
Features
Harmonic Current Attenuation to
EN61000-3-2
EMI Filtering to
EN55022, Level B
Transient Immunity to
EN61000-4-5
575W Rated Power Output
Autoranging 115/230Vac Input
Microprocessor Control
Inrush Current Limiting
Product Highlights
The ENMods system is a new AC front end
solution for compliance to electromagnetic
compatibility (EMC) standards. It consists of
the MiniHAM — a passive harmonic
attenuation module and the FARM3 — an
auto ranging AC-DC front end module.
Combined with the filtering and hold-up
capacitors as specified herein, the ENMods
system provides full compliance to:
EN61000-3-2 Harmonic Current
EN55022, Level B Conducted Emissions
EN61000-4-5 Surge Immunity
EN61000-4-11 Line Disturbances
Data Sheet
ENModsTM
Component Power
Front End System
for EN Compliance
Each module:
2.28 x 2.2 x 0.5 in
57,9 x 55,9 x 12,7 mm
Absolute Maximum Ratings
Parameter
L to N voltage (FARM3)
L to N voltage (FARM3)
+Out to –Out voltage (FARM3)
BOK to –Out voltage (FARM3)
EN to –Out voltage (FARM3)
Mounting torque
Pin soldering temperature
Pin soldering temperature
Output current
Rating
264
280
400
16
16
4-6(0.45 -0.68)
500 (260)
750 (390)
3.5
Unit
Vrms
Vrms
Vdc
Vdc
Vdc
in-lbs (N-m)
°F (°C)
°F (°C)
A
Notes
Continuous
100ms
6 each, 4-40 screw
<5 sec; wave solder
<7 sec; hand solder
The MiniHAM is the first passive product
specifically designed for compliance to EN
harmonic current limits. Unlike active PFC
solutions, the MiniHAM generates no EMI,
greatly simplifying and reducing system
noise filtering requirements. It is also
considerably smaller and more efficient than
active alternatives and improves MTBF by
an order of magnitude. Optimized for
operation on the DC bus (provided by the
FARM3) rather than directly on the AC line,
it will provide harmonic current compliance
up to 600W of input power at 230Vac.
The 115/230Vac input FARM3 is a new
member of Vicor’s Filter and Autoranging
Module product line that has been optimized
for use as the front end for the MiniHAM.
Both modules are in Vicor’s standard Mini
half-brick package. Together with Vicor’s
1st or 2nd Generation 300V input DC-DC
converters, they form the basis of a low
noise, high efficiency, rugged, simple and
reliable EN compliant power system.
Thermal Resistance
Parameter
Baseplate to sink; flat, greased surface
Baseplate to sink; with thermal pad (P/N 20264)
Baseplate to ambient
Baseplate to ambient; 1000 LFM
Typ
0.16
0.14
8.0
1.9
Unit
°C/Watt
°C/Watt
°C/Watt
°C/Watt
Part Numbering
EN1
C
1
Product
Type*
Product Grade
C = –20°C to +100°C
T = –40°C to +100°C
H = –40°C to +100°C
M = –55°C to +100°C
Pin Style**
1 = Short Pin
2 = Long Pin
S = Short ModuMate
N = Long ModuMate
1
Baseplate
1 = Slotted
2 = Threaded
3 = Thru-hole
*EN1 product includes one each MiniHAM and FARM3 with same product grade, pin and baseplate style.
**Pin styles S & N 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
ENMods System: FARM3 and MiniHAM
Set your site on VICOR at www.vicorpower.com
Rev. 1.3
Page 1 of 12

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Electrical Characteristics
PRELIMINARY
Electrical characteristics apply over the full operating range of input voltage, output power and baseplate temperature, unless
otherwise specified. All temperatures refer to the operating temperature at the center of the baseplate. Performance specifications
are based on the ENMods system as shown in Figure 1a.
FARM3 MODULE SPECIFICATIONS (see Figure 3 thru Figure 7 for operating characteristics)
Parameter
Min
Operating input voltage
90
Operating input voltage
180
Input undervoltage
AC line frequency
47
Power factor
0.68
Inrush current
Efficiency
94
AC Bus OK (BOK)
Low state resistance
Low state current
High state voltage
14.8
BOK true threshold
235
BOK false threshold
200
Module Enable (EN)
Low state resistance
Low state current
High state voltage
14.8
Enable threshold
235
Disable threshold
185
AC Bus OK - Module Enable, differential error* 15
Typ Max
115 132
230 264
90
63
0.72
30
96
15
50
15.0 15.2
240 245
205 210
15
50
15.0 15.2
240
190 195
17 20
Unit
Vac
Vac
Vac
Hz
Amps
%
mA
Vdc
Vdc
Vdc
mA
Vdc
Vdc
Vdc
Vdc
Notes
Autoranging (doubler mode)
Autoranging (bridge mode)
No damage
C-,T-, H- and M-Grade
Typical line
264Vac line voltage
Full load
To negative output - Bus normal
Bus normal
Bus abnormal, 27k internal pull up to 15Vdc (see Figure12)
Output Bus voltage
Output Bus voltage
To negative output - Converters disabled
150k internal pull up to 15Vdc (see Figure 11)
Output bus voltage
Output bus voltage
AC Bus OK and Module Enable thresholds track
* Tracking error between BUS OK and Enable thresholds
MINIHAM MODULE SPECIFICATIONS (when used in accordance with Figure 1a)
Parameter
Output power
Efficiency @115Vac
Efficiency @ 230Vac
Output voltage
External hold-up capacitance
Min Typ Max
Unit Notes
0 575 Watts
93 94
% Full load
96 97
% Full load
250 375 Vdc
3,300
µF
ELECTROMAGNETIC COMPATIBILITY (configured as illustrated in Figures 1a and 1b)
Harmonic currents
Input line disturbances
Input surge withstand
Conducted emissions
EN61000-3-2, Amendment 14
EN61000-4-11
EN61000-4-5
EN55022, Level B
50-625W, 230Vac input 575W output (see Figure 2)
2kV –50 µs common mode
1kV –50 µs differential mode
(See Figures 8a thru 8c)
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
ENMods System: FARM3 and MiniHAM
Set your site on VICOR at www.vicorpower.com
Rev. 1.3
Page 2 of 12

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Electrical Characteristics (continued)
PRELIMINARY
MODULE GENERAL SPECIFICATIONS
Parameter
Safety approvals
FARM3
MiniHAM
Isolation (in to out)
Dielectric withstand (I/O to baseplates)
Leakage current
MTBF
Baseplate material
Cover
Pin material
–Style 1 & 2
–Style S & N (ModuMate compatible)
Weight
FARM3
MiniHAM
Size
Storage temperature
(C-, T-Grade)
(H-Grade)
(M-Grade)
Operating temperature
(C-Grade)
(T-, H-Grade)
(M-Grade)
Min Typ Max
None
1500
>1,000,000
2.5
3.1(88)
5.1(145)
2.25 x 2.2 x 0.5
57,9 x 55,9 x 12,7
-40 +125
-55 +125
-65 +125
-20 +100
-40 +100
-55 +100
Unit
Vrms
mA
Hours
Ounces (grams)
Ounces (grams)
Inches
mm
°C
°C
°C
°C
°C
°C
Notes
TÜV + VDE EN60950, CE Marked (pending)
CE Marked (pending)
Isolation provided by DC-DC converter(s)
Baseplate earthed
264Vac
25˚C, Ground Benign
Aluminum
Dupont Zenite / Aluminum
Copper, Tin/Lead solder dipped
Copper, Nickel/Gold plating
Vicor’s standard mini half-brick package
Baseplate
Baseplate
Baseplate
820µF
1200µF
1800µF
Holdup Box (HUB)
HUB820-S
HUB1200-S
HUB1800-S
2200µF HUB2200-S
2700µF HUB2700-S
3300µF HUB3300-S
V5
C3
N
AC line Input
L
PE
NN
Filter
(Fig.1b)
LL
V3
Part
C1,2
C3 6
C7,8
C9,C10
R1,2
R3
V1,2
V3
V5,V6
F1,2
D1,2
D3,D4
Description
Holdup capacitors
4700pF
Film Cap., 0.8µF
.001µF
150k, 0.5W
499, 0.125W
MOV 220V
270V MOV
BBS75 Gas Tube
3A, PC Tron
Diode (1N4006)
1N5817
Vicor
Part Number
see text
01000
00127-1503
20461-220
03040
26107
02178
00670
26108
N+
EMI GND BOK
FARM3 ST
SR EN
L
C7 V1
C8 V2
N/+ N/+
NC MINI NC
HAM NC
NC NC
L/L/
V6
Sizing PCB traces:
All traces shown in bold carry significant
current and should be sized accordingly.
R1 C1
R2 C2
R3
D1
F1
D3
C9
+In
PC (Gate In)
Vicor 300Vin
DC-DC
PR (Gate Out) Converter
In
C4
C5
F2
D4
D2
C10
+In
PC (Gate In)
Vicor 300Vin
DC-DC
PR (Gate Out) Converter
In
C6
To additional converters
Figure 1a—ENMods system and DC-DC converter interconnection drawing
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
ENMods System: FARM3 and MiniHAM
Set your site on VICOR at www.vicorpower.com
Rev. 1.3
Page 3 of 12

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Operating Characteristics
PRELIMINARY
Input
L2/N
V1
L1
F1
PE
C1
R1
L1
R3
L2
R2
L3 C2
R4
C3 C4
Output
N
L
PE
Part
C1
C2, C3
C4
F1
F1
L1, L2
L3
R1, R2
R3
R4
V1
Description
Vicor
Part Number
1.0µF
02573
4700pF
01000
0.33µF
00927
6.3A Fuse(5mm) 22985
Fuse Holder 25318
27µH
14563
1.3mH
15016
1000126-10R0
150k, 0.5W 00127-1503
2.2, 2W
25896
MOV
03040
Figure 1b — Input EMI filter for EN55022, Level B compliance
10.00
Harmonic Current
1.00
Odd Harmonic Limits
*Even Harmonic Limits
Measured Values
0.10
0.01
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
Harmonic Number
Figure 2 — Measured harmonic current at 230VAC, 575W vs. EN spec limits
*Measured values of even harmonics are below 0.01A
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
ENMods System: FARM3 and MiniHAM
Set your site on VICOR at www.vicorpower.com
Rev. 1.3
Page 4 of 12

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Operating Characteristics (FARM3)
PRELIMINARY
Vdc output
Strap
Engaged
Enable
B OK
Figure 3—Start-up at 120Vac input
Vdc output
Iac input @2A / mV
Enable
B OK
Figure 5—Power-down from 120Vac
Vdc output
Enable
B OK
Figure 4—Start-up at 240Vac input
Vdc output
Iac input @2A / mV
Enable
B OK
Figure 6—Power-down from 240Vac
Vdc output
Enable
B OK
Figure 7—Output overvoltage protection 240Vac range
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
ENMods System: FARM3 and MiniHAM
Set your site on VICOR at www.vicorpower.com
Rev. 1.3
Page 5 of 12