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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+IN

PC

PR

-IN

L2/N

GATE OUT

GATE IN

L1

– OUT

E/O

+ OUT

A/S

P/OK

VI-HAM-xL

-IN

Y-Capacitor

Y-Capacitor

F2

+IN

L1

GND

L2/N

L1

LOAD

L2/N

Vicor

Line Filter

P/N 30205

6.3 A

LINE

F1

G ATE IN

G ATE OUT

Hold up Box (HUB)

R1

R2

C3

D3

D5

D1

D4

C2

C5

C6

C7

C8

C1

R3*

C4

D2

F3

V375

DC-DC

Converters

VI-26x or

VI-J6x

DC-DC

Converters

Component

Description

Vicor

Designation

Part Number

C1

0.1 μF ceramic, 50 V

C2, C3

0.01 μF ceramic, 50 V

C4

Hold up capacitor,

Available as a HUB

500 to 3,000 μF

from Vicor (see

adjoining table)

R1

50 KΩ

R2

250 Ω, 0.25 W

R3*

100 KΩ, 2 W

D1

1N4691 zener, 6.2 V

D2, D3

1N4006 diode, 800 V

00670

D4, D5

1N5817 schottky diode, 20V

26108

V1

275 V MOV

30076

C5–C8

4,700 pF Y2 cap.

01000

F1, F2

Use recommended fusing for specific

DC-DC Converters

F3

10 A, 250 V

V1

μF

μF

μF

* A 100 K, 2 Watt resistor is used for every

1,000 µF of hold-up capacitance.

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.

Figure 4 — Connection diagram HAM / DC-DC converters

PIN FUNCTION / DESCRIPTION