PD - 94589 ASF461 SERIES ADVANCED ANALOG EMI FILTER Description The ASF461 EMI filter will reduce the input line reflected ripple current of the ASA line of DC/DC converters to levels below the CEO3 limits of MIL-STD-461. These EMI filters are available with military screening and built in a facility fully qualified to MIL-PRF-38534. Four grades are offered with different screening options. Refer to Part Number section. The ASF461 Filter is built using thick film hybrid technology and seam welded in a hermetic kovar package for high reliability. These units offer superior noise reduction and power dissipation when compared with similar competitive filters. No derating is required over the entire operating temperature range. ASF Features n n n n n Uses less than 1.2 sq. in. of Board Space -55°C to +125°C Operation Greater than 50db Ripple Current Reduction Optimal Military Screening No Derating for -55°C to +125°C Operation Typical Application +Vin System Bus Input Return www.irf.com +Vout ASF461 EMI Case Filter Output Return +Vin +Vout ASA28XX Case DC/DC Input Return RL Output Return 1 11/21/02 ASF461 Series Specifications Parameter Input Voltage Condition Steady State Min 0 Typ 28 Max 50 Unit VDC Input Current Steady State Output Voltage Steady State 420 mADC Output Current Steady State 420 mADC DC Resistance (RDC) Power Dissipation Steady State 2.3 ohms 1.6 watts Noise Rejection 100 KHz 500 KHz to 10 MHz Capacitance Any pin to case Isolation Any pin to case 500VDC 100 Operating Temp Base plate -55 +25 +125 Storage Temp Base plate -65 +25 +150 °C 39 grams VOUT = VIN (IIN x RDC) 1.7 2.0 Max. Current 420 mA VDC -40 -60 db 4200 pf MΩ Weight °C Available Screening Levels and Process Variations for ASF461 Series Requirement MIL-STD-883 Method Temperature Range No Suffix ES Suffix HB Suffix CH Suffix -20°C to +85°C -55°C to +125°C -55°C to +125°C -55°C to +125°C Element Evaluation MIL-PRF-38534 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-PRF-38534 Specification 25°C 25°C -55, +25, +125°C -55, +25, +125°C 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 2 www.irf.com ASF461 Series ASF461 Block Diagram 3 5 4 6 7 1 8 2 9 Refer to last page for Pin Designation www.irf.com 3 ASF461 Series ASF461 Case Outline 1.0 75 0.8 00 0.3 50 0.6 00 1 2 3 4 1.0 75 9 8 7 6 0.0 18 ± .0 02 D ia P ins Pin Designation * Pin No. Designation 1 Input Return * 2 Input Return * 3 Input * 4 Input * 5 Output * 6 Output * 7 Case 8 Output Return * 9 Output Return * 0.8 00 5 0.2 20 Part Numbering ASF 461 / CH M od el A pp licab le M ilitary S pe cifica tion S cree ning — , ES , H B , C H Make external connection to both Pins WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 322 3331 ADVANCED ANALOG: 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. 11/02 4 www.irf.com