IRF AFC461 Advanced analog emi filter Datasheet

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
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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
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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
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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
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