Wall Industries, Inc.

Rev F

DCHBW200 SERIES

165~240 Watts, Half-Brick DC/DC Power Converters

05/14/2013

Wall Industries, Inc. • 5 Watson Brook Road, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797

website: www.wallindustries.com • e-mail: sales@wallindustries.com

Page 8 of 10

EMC CONSIDERATIONS

Recommended Schematic for EN55011, EN55022 Conducted Emission Class B Limits

+INPUT

-INPUT

C1

C2

C3

C4

C5

C6

C7

C8

L1

C11

C12

LOAD

+VIN

+VOUT

CTRL

CASE

-VIN

-VOUT

DC/DC CONVERTER

+

+

C10

C9

C14

C13

R1

L2

C15

+

DCHBW200-24SXX MODELS

Component

Value

Voltage

Reference

C1, C3, C6

330μF

50V

Nippon chemi-con KY series

C2, C4, C5, C7, C8

4.7μF

50V

1812 MLCC

C9, C10, C13, C14

10nF

2KV

1812 MLCC

C11

1000pF

3KV

1808 MLCC

C12

4700pF

3KV

1812 MLCC

L1, L2

45μH±35%

-

Common Choke, P/N: PMT-092

DCHBW200-48SXX MODELS

Component

Value

Voltage

Reference

C1, C3, C6

100μF

100V

Nippon chemi-con KY Series

C2, C4, C5, C7, C8

2.2μF

100V

1812 MLCC

C9, C10, C13, C14

10nF

2KV

1812 MLCC

C11

2200pF

3KV

1808 MLCC

C12

4700pF

3KV

1812 MLCC

C15

1000pF

2KV

1808 MLCC

L1, L2

224μH±35%

-

Common Choke P/N: PMT-087

DCHBW200-110SXX MODELS

Component

Value

Voltage

Reference

C1, C3, C6

100μF

250V

Rubycon BXF series

C2, C4, C5, C7, C8

1μF

250V

1812 MLCC

C9, C10

2200pF

2KV

1808 MLCC

C13, C14, C15

1000pF

2KV

1808 MLCC

C11, C12

2200pF

3KV

1808 MLCC

L1, L2

521μF±35%

-

Common Choke P/N: PMT-088

NOTES: 1. See page 9 for common mode choke.

2. While testing, connect the screw bolts to the shield plane to reduce EMI.

Recommended Layout with Input Filter