Rev E

LAN F SERIES

Up to 1.8 Watts

DC/DC Converter

Single and Dual Outputs

1/9/2018

Wall Industries, Inc. • 37 Industrial Drive, 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 4 of 5

MECHANICAL DRAWINGS

Unit: mm unless otherwise specified. All tolerances are ±0.25

PIN Connections

Pin

Single

Dual

1

+Vin

+Vin

2

NC

-Vout

3

NC

COM

9

NC

NC

10

+Vout

COM

11

+Vout

+Vout

12

-Vin

-Vin

Packaging

Size mm

A

B

C

D

12.0

28.55

550

6.00

APPLICATION NOTE

Filtering

External Capacitor Table

Vin

External Capacitor

Vout

External Capacitor

5VDC

4.7uF/25V

5VDC

4.7uF/25V

9VDC

4.7uF/25V

9VDC

2.2uF/25V

12VDC

2.2uF/25V

12VDC

1uF/25V

15VDC

2.2uF/25V

15VDC

0.47uF/50V

24VDC

1uF/50V

24VDC

0.47uF/50V

In some circuits sensitive to noise and ripple, a

filtering capacitor may be added to the DC/DC

output end and input end to reduce the noise and

ripple. However, the capacitance of the output filter

capacitor must be proper. If the capacitance is too

big, a startup problem might arise. To ensure safe

and reliable operation for every channel of output,

refer to the external capacitor table for the greatest

capacitance of the filter capacitor.

To get an extremely low ripple, an “LC” filtering

network may be connected to the input and output

ends of the DC/DC converter, which may produce a

more significant filtering effect. It should also be

noted that the inductance and the frequency of the

“LC” filtering network should be staggered with the

DC/DC frequency to avoid mutual interference.