PD - 94585A AFC461 SERIES ADVANCED ANALOG EMI FILTER Description The AFC461 EMI filter will reduce the input line reflected ripple current of the AHV, ATO, ATW, ATR, and AHF line of DC/DC converters to levels below the CEO3 limits of MIL-STD-461. These EMI filters are manufactured in a facility certified to MIL-PRF-38534. All purposes used to manufacture these filters have been qualified to enable Advanced Analog to deliver compliant devices. Three standards temperature grades are offered with screening options. Refer to Part Number section. The CH grade filters are fully compliant to MIL-PRF-38534 for class H. The HB grade converters are processed to MIL-PRF-38534 screening but do not have class H element evaluation as required by MIL-PRF-38534. Two grades are fully tested and operate over the full military temperature range without derating of output power. A commercial grade is also available. AFC 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 ATW, AHE, ATO, ATR and AHF Series DC/DC Converters n No Derating for -55°C to +125°C Operation n No Tantalum Capacitors for High Reliability Typical Application +Vin AFC461 EMI Filter System Bus Input Return +Vout +Vin Case Case MSTR Output Return AHE28XX (or Other) DC/DC Converter Input Return +Vin Case SLV RL Output Return AHE28XX (or Other) DC/DC Converter Input Return +Vout +Vout RL Output Return To other converters up to rated output current www.irf.com 1 11/21/02 AFC461 Series Specifications Parameter Input Voltage Condition Steady State Input Current DC Ripple Input Clamping Voltage -55°C +25°C +125°C Output Voltage 1 Min 0 Typ 28 Max 40 4.0 1.0 38.9 42.3 44.9 Steady State 43.2 47.0 49.9 47.5 51.7 54.8 Steady State DC Resistance (RDC) Steady State Power Dissipation Max. DC Current Noise Reduction 100 KHz to 50 MHz Capacitance Any pin to case Isolation Any pin to case 500VDC 100 Operating Temperature Storage Temperature Case Case -55 -65 0.07 0.10 Amps Amps RMS VDC VDC VDC VDC VOUT = VIN - IIN (RDC) Output Current Unit VDC 4.0 Amps 0.15 Ohms 1.6 Watts 40 dB 4200 pF MΩ +125 +150 Weight 39 °C °C grams 1. Typical Applications result in Vout within 2 % of Vin Available Screening Levels and Process Variations for AFC461 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 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 96hrs 160hrs @ 125°C 160hrs @ 125°C MIL-PRF-38534 25°C 25°C -55, +25, +125°C -55, +25, +125°C Seal, Fine & Gross 1014 ¬ 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 AFC461 Series AFC461 Block Diagram 1 0µ H 5 µH 1 2 0 .2 Ω 1 80 0 p Fd 0 .2Ω 1 N 5 64 9 A 3 0 .1µ F 1 1µ F 5 1 1µ F 1 80 0 p Fd 4 Refer to last page for Pin Desination 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). Advanced Analog 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 synchronization www.irf.com system is fail-safe; that is, the slaves will be 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 AFC461 Series AFC461 Case Outlines Flanged Non-Flanged 0.040 D (1.02) X 0.26 L (6.60) P ins 0.050 (1 .27) 0.800 (20.32) 0.800 (2 0.32 ) 0.040 D (1 .02 ) X 0.26 L (6 .60 ) Pin s 2 3 4 2 2.120 M ax (53.85) 1.600 (40.64) 2.870 (7 2.90 ) M ax 1 1.120 M ax (28.45) 2.550 (6 4.77 ) 0.380 M ax (9.65) 1 1.110 (2 8.19 ) 2 + Vout 3 Case 4 Output Return 5 Input Return Ø 0 .16 2 (4 .12) 2 H oles 0.380 (9 .65) M ax AFC 461 F / CH Model + Vin 5 Part Numbering Designation 1 4 1.600 (4 0.64 ) 5 Pin Designation Pin No. 2.110 (5 3.59 ) M ax 3 Screening — Applicable Military Test Standard , ES, HB, CH Case Style Omit for Standard Available Standard Miliatary Drawing (SMD) Cross Reference Standard Military Drawing PIN 91020-01HXA 91020-01HZA Vendor CAGE Code 52467 52467 Vendor Similar PIN AFC461/CH AFC461F/CH 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