PRELIMINARY AME28461 Hybrid - High Reliability EMI Filter DESCRIPTION FEATURES The AME Series of EMI filters have been designed to provide full compliance with the input line reflected ripple current requirement specified by CE03 of MIL-STD-461C over the full military temperature range while operating in conjunction with the corresponding AFL series of DC/DC converters. These filters are offered as part of a complete family of conversion products providing single and dual output voltages while operating from nominal +28 or +270 input line voltage. Other converters operating with a similar switching frequency will also benefit by use of this device. Up to 15 Ampere Output Current Attenuation > 35dB at 200KHz These EMI filters are hermetically packaged in two enclosure variations, utilizing copper-core pins to minimize resistive DC losses. Three lead styles are available, each fabricated with Lambda Advanced Analog's rugged ceramic lead-to-package seal assuring long term hermetic seal integrity in harsh environments. Manufactured in a facility fully qualified to MILPRF-38534, these converters are available in four screening grades to satisfy a wide range of applications. The CH grade is fully compliant to the requirements of MIL-PRF-38534 for class H. The HB grade is fully processed and screened to the class H requirement, but does not include element evaluation to the class H requirement. Both grades are tested to meet the complete group "A" test specification over the full military temperature range with no derating. Two grades with more limited screening are also available for use in less demanding applications. Variations in electrical, mechanical and screen requirements can be accommodated. Contact Lambda Advanced Analog for special requirements. Low Profile (0.380") Seam Welded Package Ceramic Feedthru Copper Core Pins Operation Over Full Military Temp Range Standard Microcircuit Drawings Available Typical Connection Diagram +Vout +Vin +Vin AME28461 EMI Filter System Bus Input Return Output Return Note: Filter and Converter Cases Should be Electrically Connected AFL28xx or Other DC/DC Converter Input Return +Vin +Vout RL Output Return +Vout AFL28xx or Other DC/DC Converter Input Return Output Return To Additional Converters up to Total of Filter Rated Output Current RL AME28461 SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS Note 1 Input Voltage Input Current Lead Soldering Temperature Case Temperature -100V to +100V 30 A 300C for 10 seconds Operating -55C to +125C Storage -65C to +135C Static Characteristics -55C TCASE Parameter Group A Subgroups Test Conditions Steady State Transient Note 2 IN PUT VO LTAGE O UTPUT VO LTAGE Note 3 +125C, 16 VIN 40 unless otherwise specified. 1,2,3 Min N om Max Unit - 40 - 100 -- +40 +100 VDC VDC Vout = VIN - IIN(RDC) DC RESISTAN CE Note 4 PO WER DISSIPATIO N 1 Tc = 25 C Tc = 125 C ADC 40 70 m . Maximum Current Tc = 25 C Tc = 125 C N O ISE REDUCTIO N 15.0 9.0 15.75 W 200 K Hz - 500 K Hz 500 K Hz - 1 MHz 1 MHz - 50 MHz 35 60 65 dB CAPACITAN CE Any Pin to Case Tested @ 500 VDC 100 M DEVICE WEIGHT Measured Between Any Pin and Case ISO LATIO N 1 40 nF . Slight Variations with Case Style 95 Notes to Specifications: 1. 2. 3. 4. Operation above maximum ratings may cause permanent damage to the device. Operation at maximum ratings may degrade performance and affect reliability. Device can tolerate 100 Volt transient whose duration is 100 ms when RS 0.5 . Derate Output Current linearly from 100% at 125C to 0 at 135C. DC resistance is the total resistance of the device and includes the sum of the input to output resistance and the return in to return out resistance paths. 2 gms AME28461 Case Style Outlines Case X Case W Pin Variation of Case Y 0.050 3.000 o 0.128 2.760 0.050 0.250 1 12 0.250 1.000 1.000 Ref 1.260 1.500 6 7 0.200 Typ Non-cum Pin o 0.040 Pin o 0.040 0.220 0.220 2.500 2.800 0.525 2.975 max 0.238 max 0.42 0.380 Max 0.380 Max Case Y Case Z Pin Variation of Case Y 0.050 0.300 1.150 o 0.140 0.25 typ 0.050 0.250 0.250 1 12 1.000 Ref 1.500 1.750 2.00 6 7 1.000 Ref 1.750 0.200 Typ Non-cum Pin o 0.040 Pin o 0.040 0.375 0.220 0.36 0.220 2.500 2.800 2.975 max 0.525 0.238 max 0.380 Max 0.380 Max Tolerances, unless otherwise specified: .XX = 0.010 .XXX = 0.005 AME28461 Pin Designation Pin N o. D e s igna t ion 1 Positive Input 2 Positive Input 3 Positive Input 4 Input Return 5 Input Return 6 Input Return 7 O utput Return 8 O utput Return 9 O utput Return 10 Positive O utput 11 Positive O utput 12 Positive O utput Available Screening Levels and Process Variations for AME28461 Series. R e quir e me nt M I L-STD-883 M e t hod Temperature Range No No Suffix ES ES Suffix HB HB Suffix CH CH Suffix - 20 to +85C - 55C to +125C - 55C to +125C - 55C to +125C Element Evaluation MIL- PRF- 28534 Internal Visual 2017 Temperature Cycle * Yes Yes Yes 1010 CondB Cond C Cond C Constant Acceleration 2001 500g Cond A Cond A Burn- in 1015 96hrs @ 125C 160hrs @ 125C 160hrs @ 125C MIL- PRF- 38534 & Specification 25C 25C - 55, +55, +125C - 55, +55, +125C Seal, Fine & Gross 1014 Cond C Cond A, C Cond A, C Cond A, C External Visual 2009 * Yes Yes Yes Final Electrical (Group A) * per Commercial Standards Part Numbering AME 28 461 X / CH Model Screening -- Input Voltage 28 = 28V 270 = 270V Case Style W, X, Y, Z Applicable Military Test Standard 4 , ES, HB, CH AME28461 Circuit Description Figure I. AME28461 Block Diagram Input 1 12 2 Output 11 20 nF 3 10 22 F 11 F Case 4 9 20 nF Input Return 5 8 6 7 Circuit Operation and Application Information The AME series of filters employ three stages of filtering in a low pass configuration designed to attenuate the higher frequency components of ripple currents generated by high frequency switching DC/ DC converters. Figure I. describes the general arrangement of the principal elements which have been connected to provide both differential and normal mode buffering between the input and output terminals. Employing only passive elements, AME filter operation is initiated simply by insertion into the input power path between one or more DC/DC converters and their input DC voltage bus. In this connection, Output Return output pins of the filter will be connected to input pins of the converters. When a single AME filter is used in conjunction with multiple DC/DC converters, the use will be limited to the maximum output current capability specified in the AME electrical table.1 A typical connection utilizing one filter to drive two converters is illustrated on Sheet 1. Although expressly designed to complement the AFL series of DC/DC converters, the AME filters can be successfully operated in conjunction with other converters in the Lambda Advanced Analog line including the ASA, AHF, AHV and ATR series. 1 To calculate the input current (i ) requirement of any one in converter, first determine the maximum output power by multiplying output voltage by maximum load current, divide this power by the efficiency to obtain input power and then divide input power by input voltage to obtain the input current (i i n). Note that to obtain worst case input current, you must use maximum load current, minimum efficiency and minimum line voltage in this calculation. 5 Lambda Advanced Analog The information in this data sheet has been carefully checked and is believed to be accurate; however no responsibility is assumed for possible errors.These specifications are subject to change without notice. 9715 2270 Martin Avenue Santa Clara CA 95050-2781 (408) 988-4930 FAX (408) 988-2702 MIL-PRF-38534 Qualified ISO9001 Registered 6