Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715

ENMods System: FARM3 and MiniHAM

Rev. 2.9

Page 4 of 13

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C2

R4

C4

L2/N

L1

PE

L1

R3

L2

R1

R2

L3

C1

C3

F1

V1

N

L

PE

Input

Output

Vicor

Part

Description

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

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

0.01

0.10

1.00

10.00

23456789 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

Measured Values

Odd Harmonic Limits

Even Harmonic Limits

*

Figure 2 — Measured harmonic current at 230 Vac, 575 W vs. EN spec limits

*Measured values of even harmonics are below 0.01A

OPERATING CHARACTERISTICS

Figure 1a — Offline Power Supply Configuration

FARM3

N

SR

L

+

BOK

ST

EN

–

MINI

HAM

N/+

L/–

Filter

AC line Input

EMI GND

L

N

+IN

PC

PR

–IN

+IN

PC

PR

–IN

Vicor 300 Vin

DC-DC

Converter

R1

R2

C1

C2

D2

D1

C3

C5

C4

C6

F1

F2

To additional converters

Part

C1,2

C3 – 6

C7,8

C9,C10

R1,2

R3, R4

V1,2

V3

V5,V6

F1,2

D1,2

D3,D4

Description

Holdup capacitors

4,700 pF (Y2 type)

Film Cap., 0.61

μF

0.001

μF

150 k

Ω, 0.5 W

250

Ω, 0.125 W

MOV 220 V

270 V MOV

Bidirectional TVS Diode

Use recommended fusing for

specific converters

Diode (1N4006)

1N5817

Vicor

Part Number

01000

34610

30234-220

30076

1.5KE51CA

00670

26108

Sizing PCB traces:

All traces shown in bold carry significant

current and should be sized accordingly.

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

NC

NC

NC

NC

NC

N

N

L

L

PE

V1

V2

(Fig.1b)

C7

C8

Vicor 300 Vin

DC-DC

Converter

N/+

L/–

V3

D3

C9

C10

D4

V5

V6

R3

R4

PE