IRF AMF28XXS

PD-94689B
AMF28XXS SERIES
28V Input, Single Output
HYBRID - HIGH RELIABILITY
RADIATION TOLERANT
DC/DC CONVERTER
Description
The AMF28XXS 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 ART, ARH and G-Series
converters. 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 AMF28XXS Series.
The physical configuration of the AMF28XXS series
permits mounting directly to a heat dissipation 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.
The AMF28XXS 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.
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AMF
Features
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12 Watts Output Power
Available in 3.3, 5, 7.5, 12 and 15 Volt Outputs
16 - 40 VDC Input Range (28 VDC Nominal)
Low Input/Output Noise
Total Ionizing Dose > 25KRads (Si)
2
SEE Hardened to LET up to 60 MeV.cm /mg
-55°C to +125°C Operating Range
Indefinite Short Circuit Protection
Flexible Mounting
High Power Density
Fully Isolated - Input to Output and to Case
Complimentary EMI Filter Available
Synchronizable From An External Source
Electrical Performance Similar to
AHF28XXS Series
n Standard Microcircuit Drawings Available
1
09/15/08
AMF28XXS Series
Specifications
Absolute Maximum Ratings
Recommended Operating Conditions
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
Static Characteristics
-55°C ≤ TCASE ≤ +125°C, VIN=28 VDC ±5%, C L=0, unless otherwise specified.
Group A
Subgroups
Parameter
Test Conditions
Input Voltage
Output Power
Max
Unit
16
28
40
V
3.30
5.00
7.50
12.00
15.00
3.35
5.05
7.58
12.12
15.15
AMF2803R3S
AMF2805S
AMF2807R5S
AMF2812S
AMF2815S
1
1
1
1
1
3.25
4.95
6.97
11.88
14.85
AMF2803R3S
AMF2805S
AMF2807R5S
AMF2812S
AMF2815S
2, 3
2, 3
2, 3
2, 3
2, 3
3.20
4.90
7.35
11.76
14.70
3.40
5.10
7.65
12.24
15.30
AMF2803R3S
AMF2805S
AMF2807R5S
AMF2812S
AMF2815S
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
0
0
0
0
0
3000
2400
1600
1000
800
AMF2803R3S
All Others
1, 2, 3
1, 2, 3
2
1, 2, 3
1
V
Vin = 16, 28, 40 Volts
1
mA
Vin = 16, 28, and 40 Vdc
Output Ripple Voltage
Output Voltage
Regulation
Line
AMF2803R3S
AMF2805S
AMF2807R5S
AMF2812S
AMF2815S
Load
Nom
Vin = 28 Volts, 0% load
Output Voltage
Output Current
Min
All
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
Vin = 16, 28, 40 Volts,
BW = 20 Hz to 2 MHz
Vin = 16, 28, 40 Volts
Iout = 0%, 50%, and 100%
max
10
12
W
25
60
mVPP
10
10
10
10
10
25
25
50
50
50
10
50
mV
For Notes to Specifications, refer to page 5
2
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AMF28XXS Series
Static Characteristics (Continued)
-55°C ≤ TCASE ≤ +125°C, VIN=28 VDC ±5%, CL=0, unless otherwise specified.
Group A
Subgroups
Parameter
Input Current
No Load
Inhibit
1, 2, 3
1, 2, 3
Input Ripple Current
1, 2, 3
Efficiency
AMF2803R3S
AMF2805S
AMF2807R5S
AMF2812S
AMF2815S
1, 3
1, 3
1, 3
1, 3
1, 3
AMF2803R3S
AMF2805S
AMF2807R5S
AMF2812S
AMF2815S
2
2
2
2
2
Isolation
Capacitive Load
Test Conditions
Nom
Max
Unit
Vin=28V,
Iout=0, Inhibit (pin 1)=open
(AMF2812S and AMF2815S)
(All other Models)
30
20
50
30
mA
Inhibit (pin 1) shorted to input
return (pin 7) (All Models)
8.0
12
Vin = 16, 28, 40 Volts, 100%
load, BW = 20 Hz to 2 MHz
20
50
100% load
1
Input to output or any pin to
case (except pin 6) at 500Vdc
4
4
4
4
4
No effect on dc performance
Min
mAPP
72
76
77
78
78
70
72
73
75
75
%
100
MΩ
3, 4
AMF2803R3S
AMF2805S
AMF2807R5S
AMF2812S
AMF2815S
Short Circuit Power Dissipation
Short Circuit Recovery
Switching Frequency
1, 2, 3
500
500
300
200
200
µF
6.0
W
20
ms
600
KHz
4
4, 5, 6
0% load to 100% Load
4, 5, 6
100% load
500
MIL-HDBK-217F
SF @ Tc = 35ºC
750
MTBF
Weight
550
Khr
36
g
For Notes to Specifications, refer to page 5
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AMF28XXS Series
Dynamic Characteristics
-55°C ≤ TCASE ≤ +125°C, VIN=28 VDC ±5%, CL=0, unless otherwise specified.
Group A
Parameter
Subgroups
Synchronization Input
Frequency Range
Pulse Amplitude, Hi 4
Pulse Amplitude, Lo 4
Pulse Rise time 4
Pulse Duty Cycle 4
Output Response To Step
5
Transient Load Changes
Test Conditions
4, 5, 6
Ù 100%
Load step 0% Ù 50%
4, 5, 6
AMF2803R3S
AMF2805S
AMF2807R5S
AMF2812S
AMF2815S
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
Recovery Time, Step Transient
5, 6
Load Changes
AMF2803R3S
AMF2805S
AMF2807R5S
AMF2812S
AMF2815S
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
Load step 50%
All
4, 5, 6
Load step 0%
Recovery Time Transient Step
Line Changes 4, 7
Turn On Overshoot
4, 5, 6
Load step 50%
Unit
20
700
10
0.8
100
80
KHz
V
V
ns
%
-300
+300
-400
-500
-750
-750
-750
+400
+500
+750
+750
+750
Ù 100%
Ù 50%
Input step 16 ⇔ 40Vdc
100% Load
Input step 16 ⇔ 40Vdc, 100%
load
-500
-500
-1200
-1500
-1500
Nom
mVpk
70
70
100
100
100
µs
2.0
ms
+500
+500
+1200
+1500
+1500
mVpk
800
µs
400
600
600
600
750
mVpk
20
ms
8
AMF2803R3S
AMF2805S
AMF2807R5S
AMF2812S
AMF2815S
Turn On Delay 8
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
Max
500
2.5
-0.5
All
Output Response Transient Step
4, 7
Line Changes
AMF2803R3S
AMF2805S
AMF2807R5S
AMF2812S
AMF2815S
Min
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
0% load to 100% load
4, 5, 6
0% load to 100% load
For Notes to Specifications, refer to page 5
4
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AMF28XXS Series
Notes to Specifications
1 Parameter guaranteed by line and load regulation tests.
2 Bandwidth guaranteed by design. Tested for 20Hz to 2.0MHz.
3 Capacitive load 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.
4 Parameter shall be tested as part of design characterization and after design or process changes. Therefore this Parameters shall
be guaranteed to the limit specified.
5 Load step transition time between 2.0 and 10 microseconds.
6 Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1 % of VOUT at 50 percent load.
7 Input step transition time between 1.0 and 10 microseconds. Parameter guaranteed by design but not 100% tested.
8 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.
Block Diagram
8
+Input
EMI
Filter
+Output
3
Under-Voltage
Detector
1
Enable
Output
Return
4
Primary
Housekeeping
Supply
6
Case
2
Sync
Input
Drive
Pulse Width
FB
Modulator
CS
Error
Amp &
Ref
Input
Return
7
Application Information
Inhibit Function (Enable)
Device Synchronization
Connecting the enable input (Pin 1) to input common
(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. The open circuit voltage of the
enable input is 10 +1.0 VDC.
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 10 KHz), it is
difficult to filter out and may interfere with proper
operation of sensitive systems (communication,
radar or telemetry). Interenational 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.
EMI Filter
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.
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5
AMF28XXS Series
Mechanical Outline
1.130
Ø 0.140
0.17
5
3
4
6
7
0.03D x 0.25L
8 Pins
2.10
2
1.850 1.600
0.600
1.000
1
8
0.400
0.800
0.19
0.33
1.380
Tolerance unless otherwise specified:
x.xx ±0.010
x.xxx ±0.005
Pin Designation
Pin #
Designation
1
Enable
2
Sync. Input
3
+ Output
4
Output Return
5
NC
6
Case Ground
7
Input Return
8
+ Input
Radiation Specification
Parameter
Condition
Min
Typ
Max
Unit
KRads
(Si)
Total Ionizing Dose
MIL-STD-883, Method 1019.4
Operating bias applied during exposure
25
—
—
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.
6
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AMF28XXS Series
Device Screening
Requirement
MIL-STD-883 Method
Temperature Range
No Suffix
d
CH
d
EM
-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 )
Burn-In
1015
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
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.
Standard Microcircuit Drawing Equivalence Table
Standard Microcircuit
IR Standard
Drawing Number
Part Number
Model
5962-04252
AMF2805S
5962-04253
AMF2812S
5962-04254
AMF2815S
Part Numbering
AMF 28 05 S /EM
Input Voltage
28 = 28V
Output Voltage
03R3 = 3.3V, 05 = 5V
07R5 = 7.5V, 12 = 12V
15 = 15V
Screening Level
(Please refer to Screening Table)
No suffix, CH, EM
Output
S = Single
D = Dual
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
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