FMH-461/883

FMH-461 INTERPOINT | Alldatasheet

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Technical content

DESCRIPTION

Interpoint specifically designed the FMH-461™ EMI filter to reduce the input line reflected ripple current of the following high frequency DC/DC converters: MHD, MHF, MHF+, MHV, MSA 1, and MTR series converters. It will also reduce EMI for several of Interpoint’s lower frequency converters: MHE/MLP, MHL, MTO, and MTW series. The FMH-461 filter is ideal for use in applications which must meet MIL-STD-461C levels of conducted and radiated emissions. Throughput current is 1.5 amps. At 16 VDC input (low line), the filter provides 24 watts of throughput power. MIL-STD NOISE M ANAGEMENT When used in conjunction with Interpoint converters, the FMH-461 EMI filter reduces input ripple current by 35 dB or greater at 200 kHz and by at least 50 dB at 500 kHz (see Figures 5 and 6 and electrical characteristics table). This attenuation gives the converter/filter combination performance which exceeds MIL-STD-461C’s CE03 test. FILTER O PERATION FMH-461 filters are rated for full power operation from –55°C to +125°C baseplate temperature. Operation is offered up to the absolute maximum of +135°C with derating as defined in “Recommended Operating Conditions” on the following page. The maximum DC insertion loss at full load and nominal input voltage (28 VDC) represents a power loss of less than 2%. LAYOUT R EQUIREMENTS The case of the filter must be connected to the case of the converter through a low impedance connection to minimize EMI. 1. MSA models may require an inductor in series with the MSA’s positive input. 2 µH is the suggested value. EMI I NPUT FILTER

28 VOLT INPUT

1.5 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 Size (max.): Non-flanged, case E3 Flanged, case G3 See Section B8, cases E3 and G3, for dimensions. Weight: 22 grams typical, 28 grams maximum Screening: Standard, ES, or 883 (Class H). See Section C2 for screening options, see Section A5 for ordering information. MODEL FMH-461 1.5 amp

ABSOLUTE MAXIMUM RATINGS RECOMMENDED OPERATING CONDITIONS TYPICAL CHARACTERISTICS Input Voltage

• 0 to 40 VDC continuous Lead Soldering Temperature (10 sec per lead)
• 300°C Storage Temperature Range (Case)
• –65°C to +150°C B3-18 FMH EMI FILTER
• 16 to 40 VDC continuous Case Operating Temperature (Tc)
• –55°C to +125°C full power Derating DC Input/Output current
• Derate linearly from 100% at 125°C to 0% at 135°C case Electrical Characteristics: 25°C Tc, nominal Vin, unless otherwise specified. EMI I NPUT FILTERS Capacitance
• 0.024 µF max, any pin to case Isolation
• 100 megohm minimum at 500 V
• Any pin to case, except case pin FMH-461 PARAMETER CONDITIONS MIN TYP MAX UNITS INPUT VOLTAGE CONTINUOUS 0 28 40 VDC INPUT CURRENT — — 1.5 A NOISE REJECTION 200 kHz 35 40 — dB500 kHz 50 60 — DC RESISTANCE (R DC ) TC = 25°C — 0.20 0.35 Ω OUTPUT VOLTAGE 1 STEADY STATE VOUT = VIN - IIN (RDC ) VDC OUTPUT CURRENT RIPPLE — — 0.3 A rms STEADY STATE —— 1.5 A INTERNAL POWER DISSIPATION MAXIMUM CURRENT — 0.5 0.8 W Notes 1. Typical applications result in Vout within 2% of Vin. 2 F 6800 pF 500 V Positive Input Input Common Positive Output Output Common FMH-461

590 H 30 H

5.1

1 F 2 F

FIGURE 1: SCHEMATIC

indicates pin one. Dotted line outlines flanged package option. FMH - 461 F / 883 Base Model MIL-STD-461 Reference Screening (Standard screening has no designator in this position.) Case Option (Non-flanged case has no designator in this position) B3-19 EMI I NPUT FILTERS See Section B8, cases E3 and G3 for dimensions. Pin Designation

1 Positive Input

2 Positive Output

3 Case Ground

4 Output Common

5 Input Common

FIGURE 3: PIN O UT DSCC NUMBER DSCC D RAWING (5915) 95003-01HXC 95003-01HZC FMH -461 FILTER SIMILAR PART FMH-461/883 FMH-461F/883 For exact specifications for a DSCC product, refer to the DSCC drawing. See Section A3, “SMD/DSCC Lists”, for more information. FMH EMI FILTER +Vin +Vout Input Common Output Common Case R L R L EMI FILTER DC/DC CONVERTER +Vin +Vout Input Common Output Common Case Chassis ground Multiple units allowed up to rated output current of filter FIGURE 2: CONNECTION D IAGRAM 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.

Typical Performance Curves: 25°C Tc , nominal Vin, unless otherwise specified. EMI I NPUT FILTERSFMH EMI FILTER FREQUENCY (MHz) 0.1 1 10 50.015 EMISSION LEVEL (dB A) CE03 LIMIT FIGURE 4 FREQUENCY (MHz) 0.1 1 10 50.015 EMISSION LEVEL (dB A) CE03 LIMIT FIGURE 5 FIGURE 6 -10 dB OHMS = 20 LOG ZOUT FREQUENCY (Hz)

1 K 10 K 100 K 1 M

-20 MHF+2805S Converter Without Filter MHF+2805S Converter With FMH-461 Filter Typical Output Impedance (Z) With Input Shorted FMH-461 26421-001-DTS Rev A DQ# 4044 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. FMH-461 is a trademark of Interpoint. Copyright © 1992 - 1999 Interpoint. All rights reserved.

TEST (125°C Products) 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 no no yes Method 1010, Cond. B, -55°C to 125°C no yes no CONSTANT ACCELERATION Method 2001, 3000 g no no yes Method 2001, 500 g no yes no BURN-IN Method 1015, 160 hours at 125°C 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 no no yes Subgroups 1 and 4: +25°C case yes yes no HERMETICITY TESTING 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. MOR Series MFLHP Series MFL Series MHP Series MTR Series MQO Series MHD Series MHV Series MHF+ Series MHF Series MGA Series MSA Series MGH Series MCH Series FM-704A EMI Filter FMD/FME EMI Filter FMC EMI Filter FMH EMI Filter FMGA EMI Filter FMSA EMI Filter HUM Modules LCM Modules LIM Modules QA SCREENING 125°C PRODUCTS 125°C PRODUCTS Applies to the following products MFLHP Series, MQO Series, MHF Series, FMD EMI Filters, Hum Modules, and LCM Modules do not offer ‘883” screening.