FMSA-461

FMSA-461 CRANE | Alldatasheet

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Technical content

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. 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. 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. 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. LAYOUT REQUIREMENTS The case of the filter must be connected to the case of the converter through a low impedance connection to minimize EMI. EMI INPUT FILTER

28 VOLT INPUT

0.8 AMP

FEATURES

• –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 Case A1 Weight: 10.3 grams typical, 11.5 grams maximum Screening: Standard, ES, or 883 (Class H) MODEL FMSA-461 0.8 amp

ABSOLUTE MAXIMUM RATINGS TYPICAL CHARACTERISTICSRECOMMENDED OPERATING CONDITIONS Input Voltage  0 to 40 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 FMSA EMI FILTER  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%. Electrical Characteristics: 25°C Tc, nominal Vin, unless otherwise specified. EMI INPUT FILTERS Capacitance  0.045 µF max, any pin to case Isolation  100 megohm minimum at 500 V  Any pin to case, except case pin 2 /H9262F 6800 pF 500 V 6800 pF 500 V Positive Input Input Common Positive Output Output Common FMSA-461 >285 /H9262H 6 /H9262H 2 /H9262F 0.014 /H9262F / 500 V 20 /H9024 20 /H9024 0.65 /H9024 6 /H9262H 0.014 /H9262F / 500 V 0.014 /H9262F / 500 V x 2 x 2 FIGURE 1: SCHEMATIC – TYPICAL VALUES FMSA-461 PARAMETER CONDITIONS MIN TYP MAX UNITS INPUT VOLTAGE CONTINUOUS 0 28 40 VDC TRANSIENT, 100 ms — — 80 V INPUT CURRENT — — 0.80 A DIFFERENTIAL MODE 200 kHz 40 — — dBNOISE REJECTION 500 kHZ TO 50 MHz 60 — — COMMON MODE NOISE REJECTION 2 MHz - 50 MHz 40 — — dB DC RESISTANCE (RDC) TC = 25°C — — 1.2 Ω OUTPUT VOLTAGE STEADY STATE VOUT = VIN - IIN (RDC) VDC OUTPUT CURRENT STEADY STATE (<100°C CASE) — — 0.80 A INTERNAL POWER DISSIPATION MAXIMUM CURRENT — — 0.96 W 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.

indicate pin one. BOTTOM VIEW FMSA FMSA - 461 / 883 Base Model MIL-STD-461 Reference Screening (Standard screening has no designator in this position.) EMI INPUT FILTERS See Section B8, case A1, for dimensions. Pin Designation

1 Positive Input

2, 3 Positive Output

4 Case Ground

5, 6 Output Common

7 Input Common

8 Case Ground

FIGURE 3: PIN OUT DSCC NUMBER DSCC DRAWING (5915) 96003-01HXC FMSA-461 FILTER SIMILAR PART FMSA-461/883 For exact specifications for a DSCC product, refer to the DSCC drawing. See Section A3, “SMD/DSCC Lists”, for more information. FMSA EMI FILTER C R DC/DC Converter Input Common Case Ground Output Common RL Multiple units allowed up to rated output current. 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 "Connection and Operation." C = 10 F, 100V – C = Sprague 109D106X9100C2 R = 2.2 , 5%, 1/4 W, Carbon comp. Positive Input Positive Output FIGURE 2: DAMPING CIRCUIT

Typical Performance Curves: 25°C Tc , nominal Vin, unless otherwise specified. CE03 LIMIT NARROWBAND FREQUENCY (MHz) EMISSION LEVEL (dB A) 0.1 1 10 50 .015 FIGURE 4 FREQUENCY (MHz) EMISSION LEVEL (dB A) 0.1 1 10 50 .015 NARROWBANDCE03 LIMIT FIGURE 5 FIGURE 6 MSA2805S converter without a filter. MSA2805S converters at full load with an FMSA-461 EMI filter Typical Output Impedance (Z) With Input Shorted FMSA-461 EMI Filter FREQUENCY (Hz) MAGNITUDE OF Z o (Ohms) 10K 100K 1M 10.0 3.2 1.0 0.32 0.10 2 µF external capacitor on filter output

EMI INPUT FILTERS FMSA EMI FILTER for pin configurations. Dot on top of case indicates pin one. 0.980 max (24.89) 0.805 max (20.45) Materials Header Kovar/Nickel/Gold (Case A3, Kovar/Nickel) Cover Kovar/Nickel 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. FIGURE 7: CASE AM AXIMUM DIMENSIONS 0.000 0.097 (2.46) 0.697 (17.70 Squared corner and dot on top of case indicate pin one. 0.397 (10.08) 0.000 0.135 (3.43) 0.835 (21.21) 0.270 max (6.98) 0.000 0.735 (18.67) Projection WeldSeam Seal FMSA EMI Filter and STF EMI Filter BOTTOM VIEW CASE A1 0.270 max (6.86) 0.000 0.27 ±0.02 (6.9 ±0.5) 0.27 ±0.02 (6.9 ±0.5) 0.018 ± 0.002 dia. (0.46 ± 0.05) FIGURE 8: CASE A1 Please refer to the above written numerical dimensions for accuracy.

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. FMSA Series is a trademark of Interpoint. Copyright © 1994 - 2005 Interpoint. All rights reserved. TEST (125°C Products) 125°C 125°C STANDARD /ES /883 (Class H)* Pre-cap Inspection Method 2017, 2032 yes yes yes Temperature Cycle (10 times) Method 1010, Cond. C, -65°C to 150°C, ambient no no yes Method 1010, Cond. B, -55°C to 125°C, ambient no yes no Constant Acceleration Method 2001, 300 g no no yes Method 2001, 500g no yes no Burn-In Method 1015, 160 hours at 125°C case, typical no no yes 96 hours at 125°C case, typical no yes no Final Electrical Test MIL-PRF-38534, Group A Subgroups 1 through 6: -55°C, +25°C, +125°C case no no yes Subgroups 1 and 4: +25°C case yes yes no Hermeticity Test Fine Leak, Method 1014, Cond. A no yes yes Gross Leak, Method 1014, Cond. C no yes yes Gross Leak, Dip (1 x 10-3) yes no no Final Visual Inspection Method 2009 yes yes yes Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534. *883 products are built with element evaluated components and are 100% tested and guaranteed over the full military temperature range of –55°C to +125°C. QA SCREENING 125°C PRODUCTS 125°C PRODUCTS