PD-94586B AFV461 SERIES EMI FILTER Description The AFV461 EMI filter will reduce the input line reflected ripple current of all DC/DC converter families to levels below the CEO3 limits of MIL- STD-461. This filter is intended for applications requiring compatibility to MILSTD-704A. These EMI filters are manufactured in a facility certified to MIL-PRF-38534 and are available with military screening. Four grades are offered with different screening options. Refer to Part Number section. AFV Features n n n n n 4.0 amp Input Current - max. 40 dB Noise Reduction min. @100 KHz -55°C to +125°C Operation Military Screening Compatible with all stanard 28 Volts Input DC/DC Converters n No Derating for -55°C to +125°C Operation n No Tantalum Capacitors for High Reliability Typical Application +Vin AFV461 EMI Filter System Bus Input Return +Vout +Vin Case Case Output Return AHV28XX (or Other) DC/DC Converter Input Return +Vin Case RL Output Return AHV28XX (or Other) DC/DC Converter Input Return +Vout +Vout RL Output Return To other converters up to rated output current www.irf.com 1 06/22/05 AFV461 Series Absolute Maximum Ratings Input Voltage Input Current Input Ripple Power Dissipation 50V DC 4.0A 1.0A 4.0W Lead Temperature (Soldering, 10s) +300°C Operating Case Temperature -55°C to +125°C Storage Temperature -65°C to +150°C Specifications Parameter Condition Input Voltage Steady State Transient, 1 second Input Current DC Ripple Output Voltage 1 Min Typ Max Unit 0 28 40 80 VDC 4.0 1.0 A A RMS Steady State Output Current Steady State DC Resistance (RDC) Steady State VDC VOUT = VIN - IIN (RDC) 0.07 Noise Reduction 100 KHz to 50 MHz Capacitance Any pin to case Isolation Any pin to case 500VDC 0.10 4.0 A 0.15 Ω 40 dB 4200 100 pF MΩ Weight 39 g 1. Typical Applications result in Vout within 2 % of Vin Available Screening Levels and Process Variations for AFV461 Series Requirement MIL-STD-883 Method Temperature Range No Suffix ES Suffix HB Suffix CH Suffix -20 to +85°C -55°C to +125°C -55°C to +125°C -55°C to +125°C Element Evaluation Internal Visual 2017 Temperature Cycle Yes Yes Yes 1010 Cond B Cond C Cond C Constant Acceleration 2001 500g Cond A Cond A Burn-in 1015 48hrs @ 85°C 48hrs @ 125°C 160hrs @ 125°C 160hrs @ 125°C MIL-PRF38534 25°C 25°C -55, +25, +125°C -55, +25, +125°C Cond A, C Cond A, C Cond A, C Yes Yes Yes Final Electrical (Group A) * MIL-PRF-38534 Seal, Fine & Gross 1014 External Visual 2009 Per Commercial Standards 2 www.irf.com AFV461 Series AFV461 Block Diagram 10µH 5µH 1 2 0.2Ω 0.2Ω 1800 pFd 3 11µF 5 11µF 1800 pFd 4 Refer to last page for Pin Designation Device Synchronization Whenever multiple DC/DC converters are utilized in a single system, significant low frequency noise may be generated due to slight difference in the switching frequencies of the converters (beat frequency noise). Because of the low frequency nature of this noise (typically less than 10KHz), it is difficult to filter out and may interfere with proper operation of sensitive systems (communications, radar or telemetry). International Rectifier offers an option, which provides synchronization of multiple AHE/ATW type converters, thus eliminating this type of noise. To take advantage of this capability, the system designer must assign one of the converters as the master. Then, by definition, the remaining converters become slaves and will operate at the masters’ switching frequency. The user should be aware that the www.irf.com synchronization system is fail-safe; that is, the slaves will continue operating should the master frequency be interrupted for any reason. The layout must be such that the synchronization output of the master device is connected to the synchronization input of each slave device. It is advisable to keep this run short to minimize the possibility of radiating the 250KHz switching frequency. A typical connection is illustrated on the cover sheet of this document. The appropriate converters must be ordered to take advantage of this feature. After selecting the converters required for the system, a ‘MSTR’ suffix is added for the master converter part number and an ‘SLV’ suffix is added for slave part number. See Part Number section of the applicable converter data sheets. 3 AFV461 Series AFV461 Case Outlines Non-Flanged Flanged 0.040 D (1.02) X 0.26 L (6.60) Pins 0.050 (1.27) 0.800 (20.32) 0.800 (20.32) 0.040 D (1.02) X 0.26 L (6.60) Pins 2 3 4 2 2.120 Max (53.85) 1.600 (40.64) 2.870 (72.90) Max 1 1.120 Max (28.45) 2.550 (64.77) 1 0.380 Max (9.65) Part Numbering AFV 461 F / CH Designation Model 1 + Vin 2 + Vout 3 Case 4 Output Return 5 Input Return 5 Ø 0.162 (4.12) 2 Holes 0.380 (9.65) Max 1.110 (28.19) 4 1.600 (40.64) 5 Pin Designation Pin No. 2.110 (53.59) Max 3 Applicable Military Test Standard Screening Blank, ES, HB, CH Case Style Omit for Standard Available Standard Military Drawing (SMD) Cross Reference Standard Military Drawing PIN 91020-02HXA 91020-02HZA Vendor CAGE number 52467 52467 Vendor similar PIN AFV461/CH AFV461F/CH WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 322 3331 IR SANTA CLARA: 2270 Martin Av., Santa Clara, California 95050, Tel: (408) 727-0500 Visit us at www.irf.com for sales contact information. Data and specifications subject to change without notice. 06/05 4 www.irf.com