09/06/06
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AFC461 SERIES
Description
n4.0 A Input Current - max.
n40 dB Noise Reduction min. @100 KHz
n-55°C to +125°C Operation
nMilitary Screening
nCompatible with ATW, AHE, ATO, ATR and
AHF Series DC/DC Converters
Features
AFC
Typical Application
AFC461
EMI Filter
AHE28XX
(or Other)
DC/DC Converter
+Vin
+Vin
Input Return
Input Return
+Vout
+Vout
Output Return
Output Return
RL
RL
System
Bus
AHE28XX
(or Other)
DC/DC Converter
+Vout
Output Return
+Vin
Input Return
Case Case
Case
To other converters up
to rated output current
SLV
MSTR
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 International
Rectifier to deliver compliant devices. Three standard
temperature grades are offered with screening options.
Manufactured in a facility fully qualified to MIL-PRF-
38534, these EMI filters are fabricated utilizing DSCC
qualified processes. For available screening options,
refer to device screening table in the data sheet.
nNo Derating for -55°C to +125°C Operation
nNo Tantalum Capacitors for High Reliability
n Standard Microcircuit Drawings Available
EMI FILTER
HYBRID - HIGH RELIABILITY
PD - 94585B
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AFC461 Series
Specifications
1. Typical Applications result in Vout within 2 % of Vin
Standard Microcircuit Drawing Equivalence Table
Standard Microcircuit Vendor Cage IR Standard
Drawing Number Code Part Number
91020-01HXA 52467 AFC461/CH
91020-01HZA 52467 AFC461F/CH
Parameter
Condition
Min
Typ
Max
Unit
Input Voltage Steady State 0 28 40 VDC
Input Current DC
Ripple
4.0
1.0
A
A RMS
Input Clamping Voltage -55°C
+25°C
+125°C
38.9
42.3
44.9
43.2
47.0
49.9
47.5
51.7
54.8
VDC
VDC
VDC
Output Voltage 1 Steady State VOUT = VIN - IIN (RDC) VDC
Output Current Steady State 4.0 A
DC Resistance (RDC) Steady State 0.07 0.10 0.15 Ω
Power Dissipation Max. DC Current 1.6 W
Noise Reduction 100 KHz to 50 MHz 40 dB
Capacitance Any pin to case 4200 pF
Isolation Any pin to case 500VDC 100 MΩ
Operating Temperature
Storage Temperature
Case
Case
-55
-65
+125
+150
°C
°C
Weight 55 g
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AFC461 Series
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
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.
Refer to page 4 for Pin Designation Table
Block Diagram
1
5
3
2
4
11µF
0.2Ω
11µF
0.2Ω
1800
pFd
1800
pFd
1N5649A
10µH 5µH
0.1µF
+Input +Output
Case
Output
Return
Input
Return
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AFC461 Series
Pin Designation
Pin # Designation
1 + Input
2 + Output
3 Case Ground
4 Output Return
5 Input Return
Mechanical Outlines
Non-Flanged
Flanged
1.120 Max
(28.45)
0.040 D (1.02) X
0.26 L (6.60) Pins
1.600
(40.64)
2.120
Max
(53.85)
0.380
Max
(9.65)
1
2
0.800
(20.32)
4
5
3
2.550
(64.77)
1.110
(28.19)
0.040 D (1.02) X
0.26 L (6.60) Pins
1.600
(40.64)
2.870
(72.90)
Max
2.110
(53.59)
Max
0.380
(9.65)
Max
0.050
(1.27)
1
2
0.800
(20.32)
Ø 0.162
(4.12)
2 Holes
4
5
3
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AFC461 Series
WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 252-7105
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. 09/2006
Part Numbering
Notes:
Best commercial practice
Sample tests at low and high temperatures
Device Screening
Requirement MIL-STD-883 Method No Suffix ES
d
HB CH
Temperature Range -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 N/A N/A Class H
Non-Destructive
Bond Pull
Internal Visual 2017
c
Yes Yes Yes
Temperature Cycle 1010 N/A Cond B Cond C Cond C
Constant Acceleration 2001, Y1 Axis N/A 500 Gs 3000 Gs 3000 Gs
PIND 2020 N/A N/A N/A N/A
Burn-In 1015 N/A 48 hrs@hi temp 160 hrs@125°C 160 hrs@125°C
Final Electrical MIL-PRF-38534 25°C 25°C
d
-55°C, +25°C, -55°C, +25°C,
( Group A ) & Specification +125°C +125°C
PDA MIL-PRF-38534 N/A N/A N/A 10%
Seal, Fine and Gross 1014 Cond A Cond A, C Cond A, C Cond A, C
Radiographic 2012 N/A N/A N/A N/A
External Visual 2009
c
Yes Yes Yes
N/A N/A2023 N/A N/A
AFC 461 F /CH
Model
Applicable
Military Test
Standard
Case Style
F = Flange
Blank = Non-Flanged
Screening Level
(Please refer to Screening Table)
No Suffix, ES, HB, CH
