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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
4.0 amp Input Current - max. 40 dB Noise Reduction min. @100 KHz -55C to +125C Operation Military Screening Compatible with ATW, AHE, ATO, ATR and AHF Series DC/DC Converters n No Derating for -55C to +125C Operation n No Tantalum Capacitors for High Reliability n n n n n
Typical Application
+Vin +Vout +Vin Case MSTR
System Bus
Input Return
AFC461 EMI Filter
Case
AHE28XX (or Other) DC/DC Converter
+Vout
RL
Output Return
Input Return
Output Return
+Vin Case SLV
AHE28XX (or Other) DC/DC Converter
+Vout
RL
Input Return
Output Return
To other converters up to rated output current
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1
11/21/02
AFC461 Series
Specifications
Parameter Input Voltage Input Current Input Clamping Voltage Condition Steady State DC Ripple -55C +25C +125C Steady State Steady State Steady State Max. DC Current 100 KHz to 50 MHz Any pin to case Any pin to case 500VDC Case Case 100 -55 -65 +125 +150 39 40 4200 0.07 0.10 38.9 42.3 44.9 43.2 47.0 49.9 Min 0 Typ 28 Max 40 4.0 1.0 47.5 51.7 54.8 Unit VDC Amps Amps RMS VDC VDC VDC VDC 4.0 0.15 1.6 Amps Ohms Watts dB pF M C C grams
Output Voltage Output Current
1
VOUT = VIN - IIN (RDC)
DC Resistance (RDC) Power Dissipation Noise Reduction Capacitance Isolation Operating Temperature Storage Temperature Weight
1. Typical Applications result in Vout within 2 % of Vin
Available Screening Levels and Process Variations for AFC461 Series
MIL-STD-883 Method No Suffix -20 to +85C ES Suffix -55C to +125C HB Suffix -55C to +125C CH Suffix -55C to +125C MIL-PRF-38534 2017 1010 2001 1015 MIL-PRF-38534 48hrs @ 85 C 25C Yes Cond B 500g
48hrs 96hrs @ 125C
Requirement Temperature Range Element Evaluation Internal Visual Temperature Cycle Constant Acceleration Burn-in Final Electrical (Group A) Seal, Fine & Gross External Visual
Yes Cond C Cond A 160hrs @ 125C -55, +25, +125C
Yes Cond C Cond A 160hrs @ 125C -55, +25, +125C Cond A, C Yes
25C
1014 2009

Cond A, C Yes
Cond A, C Yes
*
Per Commercial Standards
2
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AFC461 Series
AFC461 Block Diagram
1 0 H 1 1 80 0 p Fd
1 N 5 64 9 A
5 H 2
0 .2
0 .2
0 .1 F 1 1 F 1 1 F 1 80 0 p Fd
3
5
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 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.
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AFC461 Series
AFC461 Case Outlines Non-Flanged
0.040 D (1.02) X 0.26 L (6.60) P ins 0.800 (20.32)
Flanged
0.050 (1 .27) 0.040 D (1 .02 ) X 0.26 L (6 .60 ) Pin s 0.800 (2 0.32 )
2
3
4
2 3 4
2.120 M ax (53.85)
1.600 (40.64)
2.870 (7 2.90 ) M ax
2.550 (6 4.77 )
2.110 (5 3.59 ) M ax
1.600 (4 0.64 )
1
5
1
5
1.120 M ax (28.45)
0.380 M ax (9.65)
1.110 (2 8.19 )
0.380 (9 .65) M ax
O 0 .16 2 (4 .12) 2 H oles
Pin Designation
Pin No. 1 2 3 4 5 Designation + Vin + Vout Case Output Return Input Return
Part Numbering
AFC 461 F / CH
Model Applicable Military Test Standard Screening
--
, 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
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