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Data Sheet
TM
ENMods
Features
• RoHS Compliant (with F or G pin style)
• Passive harmonic current attenuation
to EN61000-3-2
• 575 W rated power output
• Autoranging 115/230 Vac input
• Inrush current limiting
Component Power
Front-end System for
EN Compliance
Product Highlights
The ENMod system is a new AC front-end
solution for compliance to electromagnetic
compatibility (EMC) standards. It consists of
the MiniHAM passive harmonic attenuation
module and the FARM3 autoranging AC-DC
front-end module. Combined with the
filtering and hold-up capacitors as specified
herein, the ENMod 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
EN61000-3-3 Inrush Current
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
at up to 600 W of input power at 230 Vac.
The 115/230 Vac 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
300 V input DC-DC converters, they form
the basis of a low noise, high efficiency,
rugged, simple and reliable EN compliant
power system.
Each module:
2.28 x 2.2 x 0.5 in
57,9 x 55,9 x 12,7 mm
Absolute Maximum Ratings
Parameter
Rating
Unit
Notes
264
280
400
16
16
VRMS
VRMS
Vdc
Vdc
Vdc
Continuous
100 ms
4 – 6 (0.45 – 0.68)
in-lbs (N-m)
Operating temperature
-40 to +100
°C
H-Grade
Storage temperature
-55 to +125
°C
H-Grade
500 (260)
750 (390)
°F (°C)
°F (°C)
Output current
3.5
A
Baseplate temperature
100
°C
FARM3
L to N voltage
+Out to –Out voltage
BOK to –Out voltage
EN to –Out voltage
Mounting torque
Pin soldering temperature
6 each, 4-40 screw
<5 sec; wave solder
<7 sec; hand solder
Thermal Resistance
Parameter
Min
Baseplate to sink
flat, greased surface
with thermal pad (P/N 20264)
Baseplate to ambient
Free convection
1000 LFM
Typ
Max
Unit
0.16
0.14
°C/Watt
°C/Watt
8.0
1.9
°C/Watt
°C/Watt
Part Numbering
EN1
C
Product Type*
Product Grade Temperatures (°C)
Grade
Operating
Storage
C = – 20 to +100
– 40 to +125
T = – 40 to +100
– 40 to +125
H = – 40 to +100
– 55 to +125
1
1
2
S
N
F
G
=
=
=
=
=
=
1
Pin Style**
Short Pin
Long Pin
Short ModuMate
Long ModuMate
Short RoHS
Long RoHS
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 vicorpower.com
Rev. 2.9
Page 1 of 13
ELECTRICAL CHARACTERISTICS
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
ENMod system as shown in Figure 1a.
INPUT SPECIFICATIONS (see Figure 3 thru Figure 7 for operating characteristics)
Parameter
Operating input voltage
Low range
High range
Min
Typ
Max
Power factor
Notes
90
115
132
Vac
Autoranging (doubler mode)
180
230
264
Vac
Autoranging (bridge mode)
90
Vac
Shutdown
63
Hz
C-, and T-Grade
Input undervoltage
AC line frequency
Unit
47
0.68
0.72
Typical line
Inrush current
30
Amps
264 Vac line voltage
Max
Unit
Notes
575
Watts
OUTPUT SPECIFICATIONS
Parameter
Min
Typ
Output power
0
Efficiency
@115 Vac
93
94
96
97
@ 230 Vac
Output voltage
250
%
Full load
%
Full load
375
Vdc
1,750
µF
Typ
Max
Unit
Notes
15.0
240
205
15
0.1
15.2
245
210
Ω
Vdc
Vdc
Vdc
Vdc
To negative output – Bus normal
50 mA maximum
Bus abnormal, 27 k internal pull up to 15 Vdc (see Fig.12)
Output Bus voltage
Output Bus voltage
15
0.1
15.2
195
Ω
Vdc
Vdc
Vdc
Vdc
To negative output – Converters disabled
50 mA maximum
150 k internal pull up to 15 Vdc (see Figure 11)
Output bus voltage
Output bus voltage
20
Vdc
AC Bus OK and Module Enable thresholds track
External hold-up capacitance
2-3300 µF in Series–HUB 3300S
CONTROL SPECIFICATIONS
Parameter
AC Bus OK (BOK)
Low state resistance
Low state voltage
High state voltage
BOK true threshold
BOK false threshold
Module Enable (EN)
Low state resistance
Low state voltage
High state voltage
Enable threshold
Disable threshold
AC Bus OK - Module Enable,
differential error*
Min
14.8
235
200
14.8
235
185
15.0
240
190
15
17
*Tracking error between BUS OK and Enable thresholds
ELECTROMAGNETIC COMPATIBILITY (configured as illustrated in Figures 1a and 1b)
Parameter
Harmonic currents
Standard
Notes
EN61000-3-2, Amendment 14
50 – 625 W, 230 Vac input 575 W output (see Figure 2)
Line disturbance / immunity
EN61000-4-11
Interruptions and brownouts
Transient / surge immunity
EN61000-4-5
2 kV –50 µs line or neutral to earth
1 kV –50 µs line to neutral
EN55022, Level B
With filter (see Figures 1a and 1b)
Conducted emissions
Flicker / inrush
EN6100-3-3
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
ENMods System: FARM3 and MiniHAM
Set your site on VICOR at vicorpower.com
Rev. 2.9
Page 2 of 13
ELECTRICAL CHARACTERISTICS (CONT.)
SAFETY SPECIFICATIONS (with baseplate earthed and quick acting line fuse 10 A max.)
Parameter
Min
Typ
Isolation (in to out)
Dielectric withstand
(I/O to baseplate)
Max
Unit
None
Notes
Isolation provided by DC-DC converter(s)
2,121
Leakage current
2.5
Vdc
Baseplate earthed
mA
264 Vac
AGENCY APPROVALS
Safety Standards
Agency Markings
FARM3
EN60950, UL60950, CSA 60950
Notes
cTÜVus
See License Conditions on the safety certificate
CE Marked
MiniHAM
EN60950, UL60950, CSA 60950
Low voltage directive
cTÜVus
See License Conditions on the safety certificate
CE Marked
Low voltage directive
GENERAL SPECIFICATIONS
Parameter
Min
Typ
Max
Unit
Notes
Baseplate material
Aluminum
MiniHAM cover
Dupont Zenite / Aluminum
FARM3 cover
Polyethermide
Pin material
Style 1 & 2
Copper, Tin/Lead solder plating
Style S & N (ModuMate compatible), Style F & G (RoHS compliant)
Weight
FARM3
MiniHAM
Size
MTBF
Copper, Nickel/Gold plating
3.1 (88)
Ounces (grams)
5.1 (145)
Ounces (grams)
2.25 x 2.2 x 0.5
Inches
57,9 x 55,9 x 12,7
mm
>1,000,000
Hours
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
Vicor’s standard mini half-brick package
25˚C, Ground Benign MIL HDBK 217F
ENMods System: FARM3 and MiniHAM
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Rev. 2.9
Page 3 of 13
OPERATING CHARACTERISTICS
V5
C3
N
N
Filter
AC line Input
L
EMI GND
PE
V3
BOK
FARM3
(Fig.1b)
SR
L
L
L
R1
+
N
N
C7
V1
NC
C8
V2
NC
MINI
HAM
ST
EN
–
L/–
Holdup Box (HUB)
410 μF HUB820-S 1100 μF
HUB2200-S
600 μF HUB1200-S 1350 μF
HUB2700-S
900 μF HUB1800-S 1650 μF
HUB3300-S
F1
C1
+IN
N/+
N/+
D3
NC
PC
NC
C9
NC
PR
L/–
Vicor 300 Vin
DC-DC
Converter
–IN
R2
C2
PE
R3
V6
Part
C1,2
C3 – 6
C7,8
C9,C10
R1,2
R3, R4
V1,2
V3
V5,V6
F1,2
C4
D1
C5
F2
Sizing PCB traces:
All traces shown in bold carry significant
current and should be sized accordingly.
+IN
R4
D4
PC
D2
C10
PR
Vicor 300 Vin
DC-DC
Converter
–IN
D1,2
D3,D4
C6
Vicor
Description
Part Number
Holdup capacitors
4,700 pF (Y2 type)
01000
Film Cap., 0.61 μF
34610
0.001 μF
150 kΩ, 0.5 W
250 Ω, 0.125 W
MOV 220 V
30234-220
270 V MOV
30076
Bidirectional TVS Diode 1.5KE51CA
Use recommended fusing for
specific converters
Diode (1N4006)
00670
1N5817
26108
To additional converters
Figure 1a — Offline Power Supply Configuration
R1
Input
Output
L3
C2
N
L2/N
L1
V1
R4
R3
C1
L1
C3
R2
PE
Vicor
Part Number
C1
1.0
02573
C2, C3
4,700 pF (Y2 type)
01000
C4
0.33 µF
00927
F1
10 A Wickman 194 Series
or Bussman ABC-10
L
L2
F1
Description
Part
C4
PE
L1, L2
27 µH
32012
L3
1.3 mH
32006
R1, R2
10Ω
R3
150 kΩ, 0.5 W
R4
2.2 Ω, 2 W
V1
MOV
30076
Figure 1b — Input EMI filter for EN55022, Level B compliance
Harmonic Current
10.00
Current (A)
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 230 Vac, 575 W 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
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Rev. 2.9
Page 4 of 13
OPERATING CHARACTERISTICS (FARM3)
Vdc output
⇒
Vdc output
Strap
Engaged
Enable
Enable
B OK
B OK
Figure 4 — Start-up at 240 Vac input
Figure 3 — Start-up at 120 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
ENMods System: FARM3 and MiniHAM
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Rev. 2.9
Page 5 of 13
TYPICAL CONDUCTED EMISSIONS WITH V300 SERIES CONVERTER AND FILTER
(see Figure 1b)
Quasi Peak and Average Limits
230 V Input, 575 W Output
Figure 8a — Peak detection
Figure 8b — Quasi peak detection
Figure 8c — Average detection
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
ENMods System: FARM3 and MiniHAM
Set your site on VICOR at vicorpower.com
Rev. 2.9
Page 6 of 13
APPLICATION NOTE
The ENMod component power front-end system for
EN compliance provides an effective solution for an AC
front end of a power supply enabled with Vicor DC-DC
converters. The ENMod system’s basic building blocks are
the MiniHAM passive harmonic attenuation module, the
FARM3 autoranging AC-DC front-end module (Figure 9) and
a discrete EMI filter.
The ENMod system provides transient/surge immunity,
harmonic current attenuation and EMI filtering, in addition to
all of the power switching and control circuitry necessary for
autoranging rectification, inrush current limiting, and
overvoltage protection. Converter enable and status functions
for orderly power up/down control or sequencing are also
provided. To complete the AC front-end configuration, the user
only needs to add hold-up capacitors, a simple EMI filter, and
a few discrete components (see Fig. 1a).
Functional Description (FARM3, see Figures 9 & 10)
Power-Up Sequence.
1.1 Upon application of input power, the hold-up capacitors
begin to charge. The thermistor limits the charge
current, and the exponential time constant is determined
by the hold-up capacitor value and the thermistor cold
resistance. The slope (dV/dt) of the capacitor voltage
versus time approaches zero as the capacitors become
charged to the peak of the AC line voltage.
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. In addition, the converter
modules are disabled via the Enable (EN) line, and BusOK (BOK) is high.
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, it 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. 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
210 Vdc.
2.2 The converters are disabled when the bus voltage falls
below 190 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,
i.e., the power conversion system “rides through”
the momentary interruption.
Power
Up
Power
Down
+OUT
90–132 V
AC Line
PTC
Thermistor
Strap
L
Strap
Output
Bus
(Vdc)
EMI
Filter
–OUT
N
SR
EN
Microcontroller
BOK
EMI GND
400
300
200
100
0
1.1
2.1
Strap
PTC
Thermistor
Bypass
Converter
Enable
Bus OK
3.1
~150 ms
~150 ms
Figure 9 — Functional block diagram: FARM3 module
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
4.1
5.1
2.2
1.2
Figure 10 — Timing diagram: power-up/down sequence
ENMods System: FARM3 and MiniHAM
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Rev. 2.9
Page 7 of 13
APPLICATION NOTE (CONT.)
Off-Line Power Supply Configuration
The ENMod system maintains the DC output bus voltage
between 250 and 370 Vdc over the entire input voltage range,
which is compatible with all Vicor 300 V input converters.
Autoranging automatically switches to the proper bridge or
doubler mode at startup depending on the input voltage,
eliminating the possibility of damage due to improper line
connection. The ENMod system is rated at 575 W output
power. 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.
FARM3 Module Pin Descriptions
(see Figures 1a, 18a and 18b)
Strap (ST) Pin. In addition to input and output power pin
connections, it is necessary to connect the Strap pin to the
center junction of the series hold-up capacitors (C1, C2) for
proper (autoranging) operation. Varistors V1 and V2 provide
capacitor protection. The bleeder resistors (R1, R2) discharge
the hold-up capacitors when power is switched off. Capacitors
C7 and C8 are recommended if the hold-up capacitors are
located more than 3 inches (75mm) from the output pins.
Enable (EN) Pin. The Enable pin must be connected to the PC
or Gate-In pin of all converter modules to disable the converters
during power-up. Otherwise, the converters would attempt to
start while the hold-up capacitors are being charged through the
current limiting 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. (see Figure 11)
Bus-OK (BOK) Pin. (see Figure 12) The Bus-OK pin is
intended to provide early-warning power fail information and
is also referenced to the SR pin.
CAUTION: There is no input to output isolation in the ENMods. 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 unit.
L, N Pins. Line and neutral input.
+, – Pins. Positive and negative outputs.
SR Pin. Signal return for BOK and EN outputs.
MiniHAM Module Pin
(see Figures 1a, 18a, and 18b)
Filter (see Figure 1b)
The input EMI filter consists of differential and common
mode chokes,Y– rated capacitors (line-ground) and X– rated
capacitors (line-line). This filter configuration provides
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, as
illustrated in Figures 8a thru 8c.
A signal diode should be placed close to and in series with the
PC or (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
SR 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, reducing 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.
(see Figure 9)
CAUTION: There is no input to output isolation in the ENMods,
hence the –Out of the ENMods 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.
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
ENMods System: FARM3 and MiniHAM
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Rev. 2.9
Page 8 of 13
APPLICATION NOTE (CONT.)
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 Figure 15). 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.
Energy is given up by the capacitors as they are discharged by
the converters. The energy expended (the power-time product)
is:
ε = PΔt = C(V12–V22) / 2
Where:
(2)
P = operating power
Δt = discharge interval
V1 = capacitor voltage at the beginning of Δt
V2 = capacitor voltage at the end of Δt
Rearranging Equation 2 to solve for the required capacitance:
The energy stored on a capacitor which has been charged to
voltage V is:
ε = 1/2(CV2)
Where: ε = stored energy
C = 2PΔt / (V12–V22)
(3)
(1)
C = capacitance
V = voltage across the capacitor
N
N
+In
+
150 k
ST
SR
EMI GND
PC (Gate In)
B OK
EMI GND
FARM3
Figure 11 — Enable (EN) function
Figure 12 — Bus OK (BOK) isolated power status indicator
100
40
1,300 μF
1,600 μF
1,100 μF
820 μF
30
90
2,200 μF
*
680 μF
Ride-through Time (ms)
Power Fail Warning Time (ms)
–
L
FARM3
35
EN
Microcontroller
–In
–
Secondary
referenced
ST
SR
PR (Gate Out)
EN
+5 Vdc
BOK
27 kΩ
Vicor DC-DC
Converter
250 Ω
Microcontroller
L
+
15 Vdc
15 Vdc
25
20
15
10
*
5
0
250
Operating Power (W)
500
Figure 13 — Power fail warning time vs. operating power and
total bus capacitance, series combination of C1, C2 (see
Figure 1a)
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80
70
60
50
40
90 Vac
115 Vac
30
20
10
0
250
Operating Power (W)
500
Figure 14 — Ride-through time vs. operating power
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Rev. 2.9
Page 9 of 13
APPLICATION NOTE (CONT.)
Hold-up Time
Ripple (V p-p)
π–θ
Power Fail
Warning
θ
254 V
205 V
190 V
Ride-Through Time
Bus OK
Power Fail
Converter
Shut down
Figure 15 — Hold-up time
30
25
820 μF
1,300 μF
1,600 μF
*
680 μF
75
2,200 μF
20
*
15
10
5
0
250
Ripple Rejection (dB)
P-P Ripple Voltage (Vac)
80
1,100 μF
70
65
60
55
50
45
40
Operating Power (W)
500
Figure 16 — Ripple voltage vs. operating power and bus
capacitance, series combination of C1, C2 (see Figure 1a)
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
2
5
15
30
50
Output Voltage
Figure 17 — Converter ripple rejection vs. output voltage (typical)
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Rev. 2.9
Page 10 of 13
APPLICATION NOTE (CONT.)
The power fail warning time (Δt) is defined as the interval
between BOK and converter shutdown (EN) as illustrated in
Figure 15. 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 in Equation (3):
C = 2PΔt / (2052 – 1902)
C = 2PΔt / (5,925)
It should be noted that the series combination (C1, C2,
see Figure 1a) requires each capacitor to be twice the
calculated value, but the required voltage rating of each
capacitor is reduced to 200 V.
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.
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 Figure 15) 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:
Δt = (π – θ) / 2πf
Where:
)
Determining Ride-through Time. Figure 14 illustrates
ride-through time as a function of line voltage and output
power, and shows that at a nominal line of 90 Vac, ridethrough would be 68 ms. Ride-through time is a function of
line voltage.
(6)
Determining the Ripple on the Output of the
DC-DC Converter. Figure 17 is used to determine the ripple
rejection of the DC-DC converter and indicates a ripple
rejection of approximately 60 dB for a 12 V output. Since 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 m Vp-p.
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:
I rms = 2P/Vac
Determining Required Capacitance for Power Fail
Warning. Figure 13 is used to determine capacitance for a
given power fail warning time and power level, and shows
that the total bus capacitance should be at least 820 µF. Since
two capacitors are used in series, each capacitor should be at
least 1,640 µF. Note that warning time is not dependent on
line voltage. A hold-up capacitor calculator is available on the
Vicor website, at vicorpower.com/hubcalc.
(5)
The approximate conduction angle is given by:
(
In this example, the output required from the DC-DC
converter at the point of load is 12 Vdc at 320 W. Therefore,
the output power from the ENMods 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 Ripple Voltage on the Hold-up Capacitors.
Figure 16 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 Vp-p.
f = line frequency
θ = rectifier conduction angle
θ = cos-1 V2/V1
Example
(7)
Where: P = total output power
Vac = operating line voltage
A variety of hold-up capacitor assemblies (HUBs) are
available. Please visit the Vicor website at
vicorpower.com/hub.
For more information about designing an autoranging
AC input power supply using the ENMods and Vicor DC-DC
converter modules, contact Vicor Applications Engineering at
the nearest Vicor Technical Support Center, or send E-mail to
[email protected]
•••
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 13, 14, and
16, respectively.
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
ENMods System: FARM3 and MiniHAM
Set your site on VICOR at vicorpower.com
Rev. 2.9
Page 11 of 13
MECHANICAL DRAWINGS
0.50 ±0.02
12,7 ±0,5
2.20
55,9
1.76
44,7
0.23
(REF)
5,8
0.01
style 2 & 3
baseplates only
(4X)***
0.300 ±0.015
7,62 ±0,38
1
2
3
0.35 (2X)
8,8
1.900
48,26
Pin CL
50,80
0.10
2,5
0.10
X 45˚
2,5
CHAMFER
4
(ALL MARKINGS
THIS SURFACE)
0.300 ±0.015
7,62 ±0,38
2.000
0.49
12,4
0.12* 0.20**
3,1 5,1
ALUMINUM
BASEPLATE
2.28 1.30
57,9 33,0
0.65
16,5
FULL R (6X)
0.130
3,30
9
7
6
0.150 DIA,(2X)
3,81
0.080 DIA,(7X)
2,03
0.43
10,9
R
0.06
(3X)
1,5
0.54
(9X) Pin Style 1&S
13,7
(Short Pin)
0.700
17,78
1.000
25,40
1.400
35,56
0.13
3,3
(6X)
5
0.400
10,16
FULL R (6X)
Slotted
(6X)
8
4-40 UNC-2B (6X)
Thru Hole
Use a 4-40 Screw (6X)
Torque to:
5 in-lbs
0.57 N-m
0.62
(9X) Pin Style 2&N
15,7
(Long Pin)
Threaded
* Style 1 baseplate only
** Style 2 & 3 baseplates
*** Reserved for Vicor accessories
Not for mounting
CL Pin center line
#30 Drill Thru (6X)
(0.1285)
2.20
55,9
(REF.)
Pin No.
1
2
3
4
5
6
7
8
9
FARM3
Function
Label
Neutral
N
EMI
GND
Signal Return
SR
Line
L
–Out
–
Enable
EN
Strap
ST
BUS OK
BOK
+Out
+
MiniHAM
Function
Label
Neutral /+ In
N /+
NC
NC
NC
NC
Line /– In
L /–
Line /– Out
L /–
NC
NC
NC
NC
NC
NC
Neutral /+ Out
N /+
Figure 18a — Mechanical Diagram
PCB THICKNESS
0.062 ±0.010
1,57 ±0,25
PLATED
THRU HOLE
DIA
1.790
45,47
0.06
R
(4X)
1,5
INBOARD
SOLDER
MOUNT
ONBOARD
SOLDER
MOUNT
PIN STYLE 1
PIN STYLE 2
(7X)
0.094 ±0.003
2,39 ±0,08
0.094 ±0.003
2,39 ±0,08
(2X)
0.164 ±0.003
4,16 ±0,08
0.164 ±0.003
4,16 ±0,08
ALL MARKINGS
THIS SURFACE
0.158
4,01
ALUMINUM
BASEPLATE
1
2
3
4
1.584*
40,23
1.900*
48.26
48,26
9
8
7
6
5
0.400*
10,16
0.700*
17,78
0.195
4,95
1.000*
25,40
1.400*
35,56
* DENOTES
±0.003
TOL =
±0,08
0.43
10,9
0.53
13,5
Note: Pin styles S & N require use of ModuMate interconnection socketing systems.
See SurfMate or InMate Design guides for PCB specifications.
Figure 18b — PCB Mounting Specifications
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
ENMods System: FARM3 and MiniHAM
Set your site on VICOR at vicorpower.com
Rev. 2.9
Page 12 of 13
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: [email protected]
Technical Support: [email protected]
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
ENMods System: FARM3 and MiniHAM
Set your site on VICOR at vicorpower.com
Rev. 2.9
6/10
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