Data Sheet
VI-HAM , VE-HAM
TM
TM
Features
• 675 Watts output power
• Unity power factor
• 85 – 264 Vac universal input
• Meets EN61000-3-2
• Short circuit protection
• Input surge limiting
• High efficiency
• RoHS compliant
• For use with Vicor’s V375, VI-26x
and VI-J6x DC-DC Converters
High-Boost Harmonic Attenuation Module
Product Overview
The high-boost HAM (Harmonic Attenuator
Module) is a universal AC input, PFC
front-end module that has been optimized
for use with Vicor’s V375 series of DC-DC
converters.
A single high-boost HAM may be used with
any combination of V375 series DC-DC
converters which are available in Micro,
Mini and Maxi packages with up to 600
Watts of output power. Versions without
internal diode bridges (HAMD and BAMD)
can be operated in parallel to provide power
expansion capability. The combination of the
high-boost HAM with V375 DC-DC
converters results in a power conversion
system with twice the power density, fewer
components and lower cost compared to
previous HAM-based solutions.
In addition, the high-boost HAM is fully
compatible with Vicor’s VI-26x and VI-J6x
series DC-DC converters. This gives
designers the freedom to choose from the
industry’s broadest selection of DC-DC
converters with outputs from 2 to 95 Vdc,
50 – 600 Watts. The user need only provide
external hold-up capacitors, a few discrete
components, and a line filter (available
from Vicor).
4.6 x 2.4 x 0.5 in
(116,8 x 61,0 x 12,7 mm)
Absolute Maximum Ratings
Parameter
L to N voltage
Mounting torque
Pin soldering temperature
Operating temperature
Storage temperature
Auxiliary output
Rating
265
280
5 (0.57)
750
(400)
–55 to +85
–65 to +100
3
Unit
Vac
Vac
in- lbs (N-m)
°F
(°C)
°C
°C
mA
M-Grade
M-Grade
Notes
Continuous
100 ms
# 6-32 or m3.5
Part Numbering
VI - HAM
RoHS Designator
VI = Non RoHS Compliant
VE = RoHS Compliant
-
C
Product Grade Temperatures (°C)
Grade
Operating
Storage
–40 to +100
E
=
–10 to +85
C
=
– 25 to +85
–40 to +100
I
=
– 40 to +85
–55 to +100
M
=
– 55 to +85
–65 to +100
L
Output
L
= 675 W
Product Type
HAM = Harmonic Attenuator Module
HAMD = Harmonic Attenuator Module
Driver
BAMD
= Harmonic Attenuator Module
Booster
(HAMD and BAMD can be used in parallel
or in arrays for applications that require more
power than that available from a single HAM)
For application information please see the Design Guide at
www.vicorpower.com/mmmguide.
Vicor Corp.
Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
HAM, High-Boost Harmonic Attenuation Module
Rev. 2.5
Page 1 of 10
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ELECTRICAL CHARACTERISTICS
Electrical characteristics apply over the specified operating voltage range, output load and baseplate temperature, unless otherwise
specified. All temperatures refer to the operating temperature of the baseplate. Specifications apply for AC mains having no more
than 5% total harmonic distortion.
INPUT SPECIFICATIONS (HAM-xL, HAMD-xL, BAMD-xL)
Parameter
Operating input voltage
HAM, HAMD, BAMD
AC line frequency
Power factor
Total harmonic distortion
(line current)
Inrush current
CM Filter Inductance
DM Filter Inductance
3
0.2
6
0.35
0.75
Min
85
47
0.99
7.5
8.5
20
13
%
%
Amps
Amps
mH
mH
Typ
Max
264
63
Unit
Vac
Hz
Notes
Rectified AC for HAMD, BAMD
Unit will operate at 400 Hz but may not meet
PF or THD specs
115 / 230 Vac, 50 – 100% load
115 Vac, sinusoidal input, full load
230 Vac, sinusoidal input, full load
230 Vac, full load
115 Vac, full load
External to HAM module (see Fig. 10)
External to HAM module (see Fig. 10)
OUTPUT SPECIFICATIONS
Parameter
Maximum output power
Output voltage
Efficiency
External hold up capacitance
per HAM
Ride through / hold up time
Ripple
Short circuit shut down current
278
360
90
93
500
16
7
5
10
6
100
280
365
Min
Typ
Max
675
282
370
91
94
3,000
Unit
Watts
Vdc
Vdc
%
%
µF
ms
Vp-p
Vp-p
mA
Notes
See power derating graph, Fig.3
115 Vac In
230 Vac In (see Fig. 3)
115 Vac, sinusoidal input, full load
230 Vac, sinusoidal input, full load
Includes external rectifier
loss for HAMD and BAMD
300 W, 500 µF minimum, external to HAM
675 W, 1,000 µF minimum, external to HAM
675 W output with 1,000 µF hold up capacitor, external to HAM
115 Vac, full load, 1,000 µF hold up capacitor, external to HAM
230 Vac, full load, 1,000 µF hold up capacitor, external to HAM
Foldback current limiting
CONTROL SPECIFICATIONS
Parameter
Power OK threshold
Module enable/disable
threshold
Auxiliary output
240
19
Min
Typ
270
250
260
23
3
Max
Unit
Vdc
Vdc
Vdc
mA
≤
3 mA
Do not overload or add external capacitance
Notes
ELECTROMAGNETIC COMPATIBILITY
Parameter
Transient / surge immunity
Line disturbance / immunity
Flicker / inrush
Harmonic current
Standard
EN61000-4-5
EN61000-4-11
EN61000-3-3
EN61000-3-2
Notes
1 kV L-N, 2 kV L-PE, 30205 filter and 30076 MOV
Main’s interruption or brown out
20 A peak inrush at 230 Vac input
7.5% THD
Vicor Corp.
Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
HAM, High-Boost Harmonic Attenuation Module
Rev. 2.5
Page 2 of 10
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ELECTRICAL CHARACTERISTICS (CONT.)
SAFETY SPECIFICATIONS
Parameter
Isolation (in to out)
Dielectric withstand
(I/O to baseplate)
Capacitance
2,121
150
Min
Typ
None
Vdc
pF
Max
Unit
Notes
Isolation provided by DC-DC converters
Baseplate earthed
Input to baseplate
AGENCY APPROVALS
Safety Standards
UL60950-1, EN60950-1, CSA 60950-1
Markings
cTÜVus, cURus
CE Marked
Notes
Low Voltage Directive
GENERAL SPECIFICATIONS
Parameter
Size
Weight
Pin material
Cover material
Thermal shut down
MTBF
HAM
HAMD
BAMD
90
420,000
424,000
818,000
Min
Typ
4.6 x 2.4 x 0.5
(116,8 x 61,0 x 12,7)
6.4 (180)
Solder plate
over copper alloy
GE ULtem 2100 black
#7310 UL94-VO rated
100
°C
hrs
hrs
hrs
Baseplate temperature
GB, 25°C
GB, 25°C
GB, 25°C
Max
Unit
in
(mm)
oz (g)
Notes
Vicor Corp.
Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
HAM, High-Boost Harmonic Attenuation Module
Rev. 2.5
Page 3 of 10
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TECHNICAL DESCRIPTION
The HAM (Figure 1) consists of a full-wave rectifier, a
high-frequency zero-current switching (ZCS) boost converter,
active inrush current limiting, short-circuit protection, control
and housekeeping circuitry. The incoming AC line is rectified
and fed to the boost converter. The control circuitry varies the
operating frequency of the boost converter to maintain the
output voltage of the HAM above the peak of the incoming
line, while forcing the input current to follow the waveshape
and phase of the line voltage. The AC input current follows the
voltage waveform and a power factor better than 0.99 is
achieved. Operating efficiency of the boost converter is
optimized at any incoming line voltage by an adaptive output
voltage (Figure 3) control scheme.
The output voltage of the HAM is a function of incoming AC
line voltage (Figure 3). On a nominal 115 Vac line, the output
voltage of the HAM is 280 Vdc — well within the input
operating voltage range of Vicor V375 DC-DC converters.
Above 180 Vac input, the output voltage linearly increases with
input voltage. At 230 Vac the delivered voltage will be
approximately 365 Vdc. For any given input line voltage, the
HAM maintains enough headroom between the output voltage
and peak input voltage to ensure high quality active power
factor correction without sacrificing operating efficiency.
AC
Line
Recti-
fier
ZCS
Boost
Converter
Current
Sense
Inrush
&
Short
Circuit
Protection
+
DC
Out
–
Note:
Non-Isolated
Output
Voltage
Waveform
High Frequency
Control
Output Voltage
Control
Module Enable
& House-
keeping
Power OK
Circuitry
Aux.
Supply
Gate In
Gate Out
NOTE: No input to output isolation.
Without PFC
Figure 1
— HAM block diagram
With PFC
Figure 2
— Input voltage and current wave forms, with and
without power factor correction
425
700
400
375
350
derate output power 11 W/V for Vin <110 Vac
325
300
275
250
95 105 115 125 135 145 155 165 175 185 195 205 215 225 235 245 255 265
110
Output Power (W)
650
600
550
500
450
400
85
Input Voltage
V
RMS
Rated Output Power
Output Voltage
Figure 3
— Output voltage and power rating versus input voltage
Vicor Corp.
Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
HAM, High-Boost Harmonic Attenuation Module
Rev. 2.5
Output Voltage (Vdc)
Page 4 of 10
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F3
V1
F1
C5
L1
GND
L2/N
LINE
L1
Vicor
Line Filter
P/N
30205
6.3 A
L2/N
LOAD
L1
GATE IN
GATE OUT
L2/N
VI-HAM-xL
+ OUT
P/OK
E/O
A/S
– OUT
R1
R2
C1
D1
D2
C2
+IN
PC
PR
D4
V375
DC-DC
Converters
-IN
C6
Y-Capacitor
Component
Designation
C1
C2, C3
C4
Description
0.1
μF
ceramic, 50 V
0.01
μF
ceramic, 50 V
Hold
up
capacitor,
500 to
3,000
μF
Vicor
Part Number
C7
Available
as a
HUB
from Vicor (see
adjoining
table)
C4
R3*
F2
+IN
D3
D5
C3
G ATE IN
G ATE OUT
-IN
C8
R1
R2
R3*
D1
D2, D3
D4, D5
V1
C5–C8
F1, F2
F3
50 KΩ
250
Ω,
0.25 W
100 KΩ, 2 W
1N4691 zener, 6.2 V
1N4006 diode,
800
V
00670
1N5817
schottky
diode, 20V
26108
275 V MOV
30076
4,700 pF Y2 cap.
01000
Use recommended fusing for
specific
DC-DC Converters
10 A, 250 V
VI-26x or
VI-J6x
DC-DC
Converters
Y-Capacitor
Hold up Box (HUB)
μF
μF
μF
*
A 100 K, 2 Watt resistor is used for every
1,000 µF of hold-up capacitance.
Figure 4
— Connection diagram HAM / DC-DC converters
PIN FUNCTION / DESCRIPTION
L1 and L2/N (HAM)
An appropriate line filter is required to limit conducted
emissions and ensure reliable operation of the HAM, see
page 8. Connect single phase AC mains to the input of the line
filter via a 10 A, 250 V fuse. Connect the output of the filter to
L1 and L2/N of the HAM. Do not put an X-capacitor across the
input of the HAM or use a line filter with an X-capacitor on its
output as power factor correction may be impacted.
+IN, –IN (HAMD, BAMD)
These pins are connected to the output of the external bridge
rectifier in HAMD / BAMD configurations (Figure 5).
GATE IN (HAM)
The user should not make any connection to this pin.
GATE IN (HAMD)
This pin provides line voltage envelope and phase information
for power factor correction. This connection must be made
through the synchronization diodes between the line filter
and bridge rectifier (Figure 5).
GATE IN (BAMD)
The Gate In pin is an interface pin to the Gate Out pin of a
HAMD or BAMD depending on configuration. The user should
not make any other connection to this pin.
GATE OUT
The Gate Out pin is a synchronization pin for HAMD/BAMD
arrays; the user should not make any other connection to this
pin.
+OUT and -OUT
Connect the +OUT of the HAM to the +IN of the respective
Vicor DC-DC converters with the recommended fuse. Connect
the -OUT of the HAM to the -IN of the converters. In addition,
an external hold-up capacitor of 1,000 µF with a minimum
voltage rating of 450 Vdc, is required (across the output of the
HAM) for 16 ms ride through time at full power (500 µF for half
power, etc). This capacitor must be in close proximity to the
HAM. Do not exceed 3,000 µF of total output capacitance. Lower
values of capacitance may be used for reduced hold up
requirements, but not less than 500 µF. Lower capacitance
values may degrade power factor specifications.
Vicor Corp.
Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
HAM, High-Boost Harmonic Attenuation Module
Rev. 2.5
Page 5 of 10
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