FMSA-461/883 INTERPOINT [Interpoint Corporation Company], FMSA-461/883 Datasheet

FMSA-461/883

Manufacturer Part Number

FMSA-461/883

Description

EMI INPUT FILTER 28 VOLT INPUT

Manufacturer

INTERPOINT [Interpoint Corporation Company]

Datasheet

1.FMSA-461883.pdf (7 pages)

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• –55°C to +125°C operation

• 50 dB minimum attenuation

• Compliant to MIL-STD-461C, CE03

• Compatible with MIL-STD-704E

DESCRIPTION

The FMSA-461 EMI filter module has been designed as a

companion for Interpoint MSA flyback power converters. Multiple

MSA power converters can be operated from a single filter provided

the total power line current does not exceed the filter maximum

rating. The FMSA filter will reduce the MSA’s power line reflected

ripple current to within the limit of MIL-STD-461C, Method CE03, as

shown in the example of Figures 4 and 5.

The FMSA is fabricated using thick film hybrid technology and is

sealed in a metal package for military, aerospace and other appli-

cations requiring EMI suppression. The filter uses only ceramic

capacitors for reliable high temperature operation.

The MSA power converter has an internal 2 µF capacitor across its

input power terminals. When the MSA and FMSA filters are used

together, this capacitor becomes part of the filter and forms its final

LC output section. When 2 or 3 MSAs are used with a single filter,

this capacitor becomes 4 µF or 6 µF respectively, rather than 2 µF,

improving the rejection vs. frequency.

EATURES

at 500 kHz

DC power bus

PERATION

Size (max.): 0.980 x 0.805 x 0.270 (24.89 x 20.45 x 6.86 mm)

Weight:

Screening: Standard, ES or Class H

See cases “A maximum dimensions” and “A1” for dimensions.

10.3 grams typical, 11.5 grams maximum

See “QA Screening: Class H, QML” for more information.

EMI I

28 V

NPUT

OLT

The FMSA filter can also be used with other types of Interpoint

power converters (MHF, MHF+, MHE, MHD, and DCH series) to

comply with CE03. For MHF, MHF+, MHD, and MHE models, the

converter has an LC type line filter such that an inductor is seen

looking into its positive input terminal. For these converters, it is

necessary to terminate the filter with a capacitor to insure uncondi-

tionally stable operation. A capacitor across the filter output termi-

nals of greater than 4µF or the optional damping circuit shown on

the connection diagram will be adequate for stable operation. No

capacitor is required for MSA, or DCH models.

The optional damping circuit (Figure 2) can be used to prevent filter

overshoot caused by MIL-STD-704A 80 V, or other, transients

having rise times of less than 200 µSec. This damping can be alter-

nately provided with a 1.50 Ω resistor in series with the filter positive

input where the additional line loss can be tolerated. For transients

with rise times of greater than 200 µsec, there is no overshoot and

the damping circuit is not required.

The case of the filter must be connected to the case of the converter

through a low impedance connection to minimize EMI.

AYOUT

PTIONAL

NPUT

ILTER

EQUIREMENTS

AMPING

IRCUIT

FMSA EMI FILTER

FMSA-461

MODEL

0.8 AMP

0.8 amp

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FMSA-461/883 Summary of contents

Page 1

... See “QA Screening: Class H, QML” for more information. The FMSA filter can also be used with other types of Interpoint power converters (MHF, MHF+, MHE, MHD, and DCH series) to comply with CE03. For MHF, MHF+, MHD, and MHE models, the converter has an LC type line filter such that an inductor is seen looking into its positive input terminal ...

Page 2

... FMSA EMI FILTER 0.8 AMP ABSOLUTE MAXIMUM RATINGS Input Voltage • VDC continuous • for 100 ms transient Lead Soldering Temperature (10 sec per lead) • 300°C Storage Temperature Range (Case) • –65°C to +150°C Electrical Characteristics: 25°C Tc, nominal Vin, unless otherwise specified. ...

Page 3

... Output Common 7 Input Common 8 Case Ground DSCC NUMBER DSCC D -461 F RAWING FMSA (5915 IMILAR 96003-01HXC FMSA-461/883 For exact specifications for a DSCC product, refer to the DSCC drawing: http://www.dscc.dla.mil/programs/smcr EMI I F NPUT ILTERS DC/DC Converter Positive Positive Output Input C Case Case Ground ...

Page 4

... FMSA EMI FILTER 0.8 AMP Typical Performance Curves: 25° nominal Vin, unless otherwise specified. FMSA EMI Filter, Rev C, November 1, 2005 (format) All technical information is believed to be accurate, but no responsibility is assumed for errors or omissions. Interpoint reserves the right to make changes in products or specifications without notice. MGH Series is a trademark of Interpoint Corporation. Copyright © ...

Page 5

CASES CASE A MAXIMUM DIMENSIONS BOTTOM VIEW Dot on top of case indicates pin one. See cases 0.805 max for pin configurations. (20.45) 0.980 max (24.89) Materials Header Cases A1 and A2 Kovar/Nickel/Gold Case A3 Kovar/Nickel) Cover ...

Page 6

... CASES BOTTOM VIEW CASE A1 FMSA EMI Filter and STF EMI Filter Seam Seal Projection Weld Squared corner and dot on top of case indicate pin one. 0.697 (17.70 0.397 (10.08) 0.097 (2.46) 0.000 0.018 ± 0.002 dia. (0.46 ± 0.05) Seal hole: 0.056 ±0.002 (1.42 ±0.05) Case dimensions in inches (mm) Tolerance ± ...

Page 7

TEST Pre-cap Inspection Method 2017, 2032 Temperature Cycle (10 times) Method 1010, Cond. C, -65°C to 150°C, ambient Method 1010, Cond. B, -55°C to 125°C, ambient Constant Acceleration Method 2001, 3000 g Method 2001, 500g Burn-In Method 1015, 160 hours ...

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