09/15/08
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Description
n12W Output Power
nAvailable in ±5V, ±12V and ±15V Outputs
n16 - 40VDC Input Range (28VDC Nominal)
nLow Input/Output Noise
nTotal Ionizing Dose > 25KRads (Si)
n SEE Hardened to LET up to 60MeV.cm2/mg
n -55°C to +125°C Operating Range
nIndefinite Short Circuit Protection
n Flexible Mounting
n High Power Density
nFully Isolated - Input to Output and to Case
nComplimentary EMI Filter Available
nExternally Synchronizable
nElectrical Performance Similar to
AHF28XXD Series
n Standard Microcircuit Drawings Available
Features
AMF
28V Input, Dual Output
The AMF28XXD has been designed for high density using
chip and wire hybrid technology that complies with the class
H requirements of MIL-PRF-38534. Manufactured in a facility
fully qualified to MIL-PRF-38534, these converters are
fabricated utilizing DSCC qualified processes. For
available screening options, refer to device screening
table in the data sheet. Applicable generic lot qualification
test data including radiation performance can be made
available on request. Consult IR Santa Clara for special
requirements.
AMF28XXD SERIES
The AMF28XXD series of DC/DC converter modules
has been specifically designed for operation in
moderate radiation environments supplementing the
higher radiation performance available in the
International Rectifier ART2815T converter series.
Environments presented to space vehicles operating
in low earth orbits, launch boosters, orbiting space
stations and similar applications requiring a low power,
high performance converter with moderate radiation
hardness performance will be optimally served by the
AMF28XXD series.
The physical configuration of the AMF28XXD series
permits mounting directly to a heat conduction surface
without the necessity of signal leads penetrating the
heat sink surface. This package configuration permits
greater independence in mounting and more mechanical
security than traditional packages. International
Rectifier’s rugged ceramic seal pins are used
exclusively in the package thereby assuring long term
hermeticity.
HYBRID - HIGH RELIABILITY
RADIATION TOLERANT
DC/DC CONVERTER
PD-94688C
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AMF28XXD Series
Specifications
For Notes to Specifications, refer to page 5
Static Characteristics -55°C ≤ TCASE ≤ +125°C, VIN=28VDC ±5%, CL=0, unless otherwise specified.
Parameter
Group A
Subgroups
Test Conditions
Min
Nom
Max
Unit
Input Voltage 16 28 40 V
Output Voltage
AMF2805D
AMF2812D
AMF2815D
AMF2805D
AMF2812D
AMF2815D
1
1
1
2, 3
2, 3
2, 3
Vin = 28 Volts, 10% load on
both outputs
±4.95
±11.88
±14.85
±4.90
±11.76
±14.70
±5.00
±12.00
±15.00
±5.05
±12.12
±15.15
±5.10
±12.24
±15.30
V
Output Current 1, 2
AMF2805D
AMF2812D
AMF2815D
1, 2, 3
1, 2, 3
1, 2, 3
Vin = 16, 28, 40 Volts
each output
each output
each output
240
100
80
2160
900
720
mA
Output Power 1, 2
AMF2805D
AMF2812D
AMF2815D
1, 2, 3
1, 2, 3
1, 2, 3
Vin = 28 Volts, 100% load
12
12
12
W
Output Ripple Voltage 1, 3
AMF2805D
AMF2812D
AMF2815D
1, 2, 3
1, 2, 3
1, 2, 3
Vin = 16, 28, 40 Volts,
100% load,
BW = 20 Hz to 2 MHz
25
25
25
60
60
60
mVPP
Output voltage Regulation 3
Line AMF2805D
AMF2812D
AMF2815D
Load AMF2805D
AMF2805D
AMF2805D
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
Vin = 16, 28, 40 Volts
Iout = 10, 50%, and 100%
load
±10
±10
±10
±10
±10
±10
±25
±50
±50
±50
±50
±50
mV
Input Voltage range -0.5V to +50VDC Input Voltage range +16V to +40VDC
Soldering temperature 300°C for 10 seconds Output Power Less than or equal to 12W
Storage case temperature -65°C to +135°C Operating case temperature -55°C to +125°C
Recommended Operating Conditions Absolute Maximum Ratings
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AMF28XXD Series
Static Characteristics (Continued) -55°C ≤ TCASE ≤ +125°C, VIN=28VDC ±5%, CL=0, unless otherwise specified.
For Notes to Specifications, refer to page 5
Parameter
Group A
Subgroups
Test Conditions
Min
Nom
Max
Unit
Cross Regulation 5
AMF2805D
AMF2812D
AMF2815D
1, 2, 3
1, 2, 3
1, 2, 3
Minimum 1.0 watt on both
outputs 10%-90% load
10
3.0
3.0
%
Input Current
No Load AMF2805D
AMF2812D
AMF2815D
Inhibit AMF2805D
AMF2812D
AMF2815D
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
Vin=28V,
Iout=0, Inhibit (pin 1)=open
Inhibit (pin 1) shorted to input
return (pin 7)
35
35
35
8.0
8.0
8.0
60
60
60
12
12
12
mA
Input Ripple Current 3
AMF2805D
AMF2812D
AMF2815D
1, 2, 3
1, 2, 3
1, 2, 3
Vin = 16, 28, 40 Volts, 100%
load, BW = 20 Hz to 2 MHz
20
20
20
50
50
50
mAPP
Efficiency 3
AMF2805D
AMF2812D
AMF2815D
AMF2805D
AMF2812D
AMF2815D
1, 3
1, 3
1, 3
2
2
2
100% load
76
77
78
72
74
74
%
Isolation 1 Input to output or any pin to
case (except pin 6) at 500Vdc
100
MΩ
Capacitive Load 5, 6
AMF2805D
AMF2812D
AMF2815D
4 No effect on dc performance,
total for both outputs
500
200
200
µF
Short Circuit Power Dissipation 1, 2, 3
6.0
W
MTBF MIL-HDBK-217F, SF @
Tc=35°C
750 Khrs
Weight 36 g
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AMF28XXD Series
Dynamic Characteristics -55°C ≤ TCASE ≤ +125°C, VIN=28VDC ±5%, CL=0, unless otherwise specified.
For Notes to Specifications, refer to page 5
Parameter
Group A
Subgroups
Test Conditions
Min
Nom
Max
Unit
Short Circuit Recovery 6
AMF2805D
AMF2812D
AMF2815D
4, 5, 6
4, 5, 6
4, 5, 6
0% load to 100% Load
25
25
25
ms
Switching Frequency 3 4, 5, 6 100% load 500 550 600 KHz
Synchronization Input 3
Frequency Range
Pulse Amplitude, Hi 6
Pulse Amplitude, Lo
6
Pulse Rise time
6
Pulse Duty Cycle 6
4, 5, 6
500
2.5
-0.5
20
700
10
0.8
100
80
KHz
V
V
ns
%
Output Response To Step Transient
Load Changes 3, 7
4, 5, 6
4, 5, 6
Load step 50%
Ù
100%
Load step 10%
Ù
50%
-200
--800
+200
+800
mVpk
Recovery Time, Step Transient Load
Changes 3, 7, 8
4, 5, 6
4, 5, 6
Load step 50%
Ù
100%
Load step 10%
Ù
50%
70
2000
µs
Output Response Transient Step Line
Changes 3, 6, 9
AMF2805D
AMF2812D
AMF2815D
4, 5, 6
4, 5, 6
4, 5, 6
Input step 16
Ù
to 40Vdc,
100% Load
-450
-750
-750
+450
+750
+750
mVpk
Recovery Time Transient Step Line
Changes 3, 6, 9
4, 5, 6
Input step 16
Ù
40Vdc,
100% load
1200
µs
Turn On Overshoot 3, 10
All
AMF2805D
AMF2812D
AMF2815D
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
0% load
100% load
600
400
300
300
mVpk
Turn On Delay 3, 10
4, 5, 6
0% load to 100% load
25
ms
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AMF28XXD Series
Block Diagram
Application Information
Inhibit Function (Enable)
EMI Filter
Device Synchronization
Notes to Specifications
An optional EMI filter is available (AFH461) that will
reduce the input ripple current to levels below the
limits imposed by MIL-STD-461 CE03.
When multiple DC/DC converters are utilized in a
single system, significant low frequency noise may
be generated due to a small difference in the
switching frequency 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 (communication,
radar or telemetry). International Rectifier provides
synchronization of multiple AMF type converters to
match switching frequency of the converter to the
frequency of the system clock, thus eliminating this
type of noise.
(Pin 7) will cause the converter to shut down. It is
recommended that the enable pin be driven by an
open collector device capable of sinking at least 400
µA of current. If the user chooses not to use the inhibit
function, it may be left open and the converter will
function normally. Because it is internally pulled up,
the open circuit voltage of the inhibit input is 10 +1.0VDC.
1. Applicable to positive and negative outputs.
2. Maximum combined output is 12W. 10.8W (max.) is available from either output (90%).
3. Load current split equally between +VOUT and –VOUT.
4. 1.2W load on output under test, 1.2W to 10.8W load change on other output.
5. Capacitive value may be any value from 0 to the maximum limit without compromising DC performance. A
capacitive load in excess of the maximum limit will not disturb loop stability but may interfere with the operation
of the load fault detection circuitry, appearing as a short circuit during turn-on.
6. Parameter shall be tested as part of design characterization and after design or process changes. Thereafter,
parameters shall be guaranteed to the limit specified.
7. Load step transition time between 2.0µs and 10µs.
8. Recovery time is measured from initiation of the transient to where Vout has returned to within ±1% of Vout at
50% load.
9. Input step transient time between 1.0µs and 10µs.
10. Turn-on delay time measurement is for either a step application of power at the input or the removal of a
ground signal from the inhibit pin while power is applied to the input.
3
4
+Output
Output
Return
Pulse Width
Modulator
Primary
Housekeeping
Supply
EMI
Filter
8
1
2
7
+Input
Enable
Sync
Input
Input
Return
FB
CS
Drive
5
- Output
6
Case
Error
Amp &
Ref
Connecting the enable input (Pin 1) to input common
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AMF28XXD Series
Mechanical Outline
1.6001.850
1.380
1.130 Ø 0.140
0.19
8
1
67
2345
0.600
0.800
1.000
0.400
0.03D x 0.25L
8 Pins
2.10
0.33
0.17
Tolerance unless otherwise specified:
x.xx ±0.010
x.xxx ±0.005
Radiation Specification
Parameter
Condition
Min
Typ
Max
Unit
Total Ionizing Dose MIL-STD-883, Method 1019.4
Operating bias applied during exposure
30 — — KRads
(Si)
Heavy Ion
(Single event effects)
BNL Dual Van de Graf Generator 60 — — MeV •cm2
/mg
International Rectifier currently does not have a DSCC certified Radiation Hardness Assurance Program.
Pin Designation
Pin # Designation
1 Enable
2 Sync Input
3 + Output
4 Output Return
5 - Output
6 Case Ground
7 Input Return
8 + Input
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AMF28XXD Series
Part Numbering
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. 09/2008
Standard Microcircuit Drawing Equivalence Table
Standard Microcircuit IR Standard
Drawing Number Part Number
5962-05222 AMF2812D
5962-05223 AMF2815D
Device Screening
Requirement MIL-STD-883 Method No Suffix
d
CH
d
EM
Temperature Range -55°C to +125°C -55°C to +125°C -55°C to +85°C
Element Evaluation MIL-PRF-38534 Class H Class H N/A
Non-Destructive Bond Pull 2023 N/A N/A N/A
Internal Visual 2017 Yes Yes
c
Temperature Cycle 1010 Cond C Cond C Cond C
Constant Acceleration 2001, Y1 Axis 3000 Gs 3000 Gs 3000 Gs
PIND 2020 Cond A Cond A N/A
320 hrs @ 125°C 320 hrs @ 125°C 48 hrs @ 125°C
( 2 x 160hrs ) ( 2 x 160hrs )
Final Electrical MIL-PRF-38534 -55°C, +25°C, -55°C, +25°C, -55°C, +25°C,
( Group A ) & Specification +125°C +125°C +85°C
PDA MIL-PRF-38534 2% 2% N/A
Seal, Fine and Gross 1014 Cond A, C Cond A, C Cond A
Radiographic 2012 Yes Yes N/A
External Visual 2009 Yes Yes
c
Burn-In 1015
Notes:
Best commercial practice.
Device with ‘/CH’ suffix is a DSCC class H compliant without radiation performance. No suffix is a radiation rated
device but not available as a DSCC qualified SMD per MIL-PRF-38534.
International Rectifier currently does not have a DSCC certified Radiation Hardness Assurance Program.
AMF 28 05 D /EM
Model
Input Voltage
28 = 28V Output
S = Single
D = Dual
Output Voltage
05 = ±5V
12 = ±12V
15 = ±15V
Screening Level
(Please refer to Screening Table)
No Suffix, CH, EM
