VI-HAM™, VE-HAM™

Rev 2.7

Page 5 of 10

08/2017

VxHAMxL

+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

6.3A

LINE

F1

GATE IN

GATE 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

0.1µF ceramic, 50V

C2, C3

0.01µF ceramic, 5V

C4

Hold up capacitor,

Available as a HUB

500 to 3,000µF

from Vicor (see

adjoining table)

R1

50k

R2

250 , 0.25W

R3*

100k , 2W

D1

1N4691 zener, 6.2V

D2, D3

1N4006 diode, 800V

00670

D4, D5

1N5817 schottky diode, 20V

26108

V1

275V MOV

30076

C5–C8

4,700pF Y2 cap.

01000

F1, F2

Use recommended fusing for specific

DC-DC Converters

F3

10A, 250V

V1

µ

F

µ

F

µ

F

* A 100k

Ω, 2 Watt resistor is used for every

1,000µF of hold-up capacitance.

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 10A,

250V 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 1,000µF with a minimum voltage

16 ms ride through time at full power (500µF for half power,

etc). This capacitor must be in close proximity to the HAM. Do

not exceed 3,000µF of total output capacitance. Lower values

of capacitance may be used for reduced hold up requirements,

but not less than 500µF. Lower capacitance values may degrade

power factor specifications.

Figure 4 — Connection diagram HAM / DC-DC converters