11/21/02

www.irf.com

1

ADVANCED ANALOG

EMI FILTER

ASF461 SERIES

Description

n Uses less than 1.2 sq. in. of Board Space

n -55°C to +125°C Operation

n Greater than 50db Ripple Current Reduction

n Optimal Military Screening

n No Derating for -55°C to +125°C Operation

Features

ASF

The ASF461 EMI filter will reduce the input line re-

flected ripple current of the ASA line of DC/DC convert-

ers to levels below the CEO3 limits of MIL-STD-461.

These EMI filters are available with military screening

and built in a facility fully qualified to MIL-PRF-38534.

Four grades are offered with different screening op-

tions. Refer to Part Number section.

The ASF461 Filter is built using thick film hybrid tech-

nology and seam welded in a hermetic kovar package

for high reliability.

These units offer superior noise reduction and power

dissipation when compared with similar competitive

filters. No derating is required over the entire operating

temperature range.

Typical Application

ASF461

EMI

Filter

+Vin

Input

Return

+Vout

Output

Return

R

L

System

Bus

Case

ASA28XX

DC/DC

+Vout

Output

Return

+Vin

Input

Return

Case

PD - 94589