FMSA-461/883 [CRANE]

EMI INPUT FILTER 28 VOLT INPUT; EMI输入滤波器28伏特的输入


型号：	FMSA-461/883
厂家：	Crane Aerospace & Electronics.
描述：	EMI INPUT FILTER 28 VOLT INPUT EMI输入滤波器28伏特的输入数据线路滤波器过滤器输入元件 LTE
文件：	总7页 (文件大小：384K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

FEATURES

FMSA EMI FILTER

0.8 AMP

EMI INPUT

28 VOLT

ILTER

NPUT

• –55°C to +125°C operation

• 50 dB minimum attenuation

at 500 kHz

• Compliant to MIL-STD-461C, CE03

• Compatible with MIL-STD-704E

DC power bus

MODEL

FMSA-461

0.8 amp

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

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

Weight:

Screening: Standard, ES or Class H

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

10.3 grams typical, 11.5 grams maximum

DESCRIPTION

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 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.

OPTIONAL DAMPING CIRCUIT

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.

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.

LAYOUT REQUIREMENTS

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

through a low impedance connection to minimize EMI.

FMSA EMI FILTER

0.8 AMP

EMI INPUT

ILTERS

RECOMMENDED OPERATING CONDITIONS

ABSOLUTE MAXIMUM RATINGS

TYPICAL CHARACTERISTICS

Input Voltage

Input Voltage Range

Capacitance

• 0 to 50 VDC continuous

• 80 V for 100 ms transient

Lead Soldering Temperature (10 sec per lead)

• 300°C

Storage Temperature Range (Case)

• –65°C to +150°C

• 16 to 40 VDC continuous

Case Operating Temperature (Tc)

• –55°C to +125°C full power

Derating Input/Output Current

• Derate linearly from 100% at 100°C to 0.60

amps at 125°C case. Above 125°C derate to 0%.

• 0.045 µF max, any pin to case

Isolation

• 100 megohm minimum at 500 V

• Any pin to case, except case pin

Electrical Characteristics: 25°C Tc, nominal Vin, unless otherwise specified.

FMSA-461

PARAMETER

CONDITIONS

MIN

TYP

—

MAX

UNITS

VDC

INPUT VOLTAGE

CONTINUOUS

TRANSIENT , 100 ms

—

INPUT CURRENT

—

0.80

—

NOISE REJECTION

500 kHz

1 MHz

—

NOISE REJECTION

DC RESISTANCE (R

5 MHz

—

)

TC = 25°C

—

1.2

Ω

= V - I (R

IN IN

)

OUTPUT VOLTAGE

OUTPUT CURRENT

STEADY STATE

VDC

OUT

STEADY STATE (<100°C CASE)

—

0.80

0.96

INTERNAL POWER

DISSIPATION

MAXIMUM CURRENT

—

Notes:

1. Guaranteed by design, not tested.

>285 ␮H

6 ␮H

0.65 ⍀

Positive

Output

Positive

Input

6800 pF

500 V

x 2

0.014 ␮F / 500 V

20 ⍀

2 ␮F

x 2

6800 pF

500 V

0.014 ␮F / 500 V

Output

Common

Input

Common

0.014 ␮F / 500 V

FMSA-461

The case ground connection between the filter and the converter should be as low an impedance as possible

to minimize EMI. Direct contact of baseplate to chassis ground provides the lowest impedance.

FIGURE 1: SCHEMATIC – TYPICAL VALUES

FMSA EMI FILTER

0.8 AMP

EMI INPUT

FILTERS

FMSA-461

DC/DC Converter

Positive

Output

Positive

Output

Positive

Input

Positive

Input

Case

Ground

Case

Ground

Input

Common

Output

Common

Input

Common

Output

Common

The RC output is an optional

damping circuit. It is recommended in

applications where 80 volt line

transients may occur with rise times

<200 s. See text page one

Multiple units

allowed up to

rated output current.

"Connection and Operation."

C = 10 F, 100V –

C = Sprague 109D106X9100C2

R = 2.2 , 5%, 1/4 W, Carbon comp.

FIGURE 2: DAMPING CIRCUIT

PIN OUT

Squared corner and

dot on top of cover

indicate pin one.

Designation

Positive Input

Positive Output

Case Ground

Output Common

Input Common

Case Ground

2, 3

2 3

BOTTOM

VIEW

5, 6

FMSA

6 5

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

FIGURE 3: PIN OUT

MODEL NUMBERING KEY

DSCC NUMBER

DSCC DRAWING

(5915)

FMSA-461 FILTER

SIMILAR PART

FMSA - 461

883

Base Model

MIL-STD-461 Reference

Screening

96003-01HXC

FMSA-461/883

(Standard screening has no designator

in this position.)

For exact specifications for a DSCC product, refer to the

DSCC drawing: http://www.dscc.dla.mil/programs/smcr

FMSA EMI FILTER

0.8 AMP

EMI INPUT

FILTERS

Typical Performance Curves: 25°C Tc , nominal Vin, unless otherwise specified.

NARROWBAND

.015

0.1

FREQUENCY (MHz)

MSA2805S converter without a filter.

FIGURE 4

NARROWBAND

.015

0.1

FREQUENCY (MHz)

MSA2805S converters at full load with

an FMSA-461 EMI filter

FIGURE 5

10.0

3.2

1.0

0.32

0.10

2 µF external capacitor on filter output

10K

100K

FREQUENCY (Hz)

Typical Output Impedance (Z)

With Input Shorted

FMSA-461 EMI Filter

FIGURE 6

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

CASES

CASE A MAXIMUM DIMENSIONS

BOTTOM VIEW

Dot on top of case

indicates pin one.

See cases A1 - A3

for pin configurations.

0.805 max

(20.45)

0.980 max

(24.89)

Materials

Header

Cases A1 and A2

Kovar/Nickel/Gold

Case A3

Kovar/Nickel)

Kovar/Nickel

Cover

Pins

Kovar/Nickel/Gold,

matched glass seal

Case dimensions in inches (mm)

Tolerance 0.005 (0.13) for three decimal places

0.01 (0.3) for two decimal places

unless otherwise specified

CAUTION

Heat from reflow or wave soldering may damage the device.

Solder pins individually with heat application not exceeding 300°C for 10 seconds per pin.

Case A maximum dimensions, Rev B, September 23, 2005

Please refer to the numerical dimensions for accuracy. All 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.

CASES

BOTTOM VIEW CASE A1

FMSA EMI Filter and STF EMI Filter

Projection Weld

Seam Seal

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 0.005 (0.13) for three decimal places

0.01 (0.3) for two decimal places

unless otherwise specified

CAUTION

Heat from reflow or wave soldering may damage the device.

Solder pins individually with heat application not exceeding 300°C for 10 seconds per pin

Case A1, Rev B, September 8, 2005

Please refer to the numerical dimensions for accuracy. All 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.

QUALITY ASSURANCE

CLASS H, QML SCREENING

TEST

125°C

Class H

/883

STANDARD

non-QML

/ES

non-QML

QML

Pre-cap Inspection

Method 2017, 2032

yes

Temperature Cycle (10 times)

Method 1010, Cond. C, -65°C to 150°C, ambient

Method 1010, Cond. B, -55°C to 125°C, ambient

yes

Constant Acceleration

Method 2001, 3000 g

Method 2001, 500g

yes

Burn-In

Method 1015, 160 hours at 125°C case, typical

96 hours at 125°C case, typical

yes

Final Electrical Test MIL-PRF-38534, Group A

Subgroups 1 through 6: -55°C, +25°C, +125°C case

Subgroups 1 and 4: +25°C case

yes

Hermeticity Test

Fine Leak, Method 1014, Cond. A

yes

Gross Leak, Method 1014, Cond. C

-3

Gross Leak, Dip (1 x 10 )

yes

Final Visual Inspection

Method 2009

yes

Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534.

QA Screening Class H, QML Rev B November 1, 2005 (typo).

This revision supercedes all previous releases. All technical infor-

mation 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.

Class H,

QML Screening

page 1 of 1

FMSA-461/883 [CRANE]

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