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PD - 94688
AMF28XXD SERIES ADVANCED ANALOG RADIATION TOLERANT DC/DC CONVERTERS
Description
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 Advanced Analog 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. Advanced Analog's rugged ceramic seal pins are used exclusively in the package thereby assuring long term hermeticity. 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. Finished product are fabricated in a facility fully qualified to MIL-PRF-38534. The standard processing adopted for the AMF28XXD meets the requirements of MIL-PRF38534 for class H but with enhanced screening steps and includes element evaluation. Applicable generic lot qualification test data including radiation performance can be made available on request. Consult Advanced Analog for special requirements.
28V Input, Dual Output
AMF Features
n n n n n n n n n n n n n n 12 Watts Output Power Available in 5, 12 and 15 Volt Outputs 16 - 40 VDC Input Range (28 VDC Nominal) Low Input/Output Noise Total Ionizing Dose > 30KRads (Si) 2 No SEE to LET > 60 MeV-cm /mg -55C to +125C Operating Range Indefinite Short Circuit Protection Flexible Mounting High Power Density Fully Isolated - Input to Output and to Case Complimentary EMI Filter Available Externally Synchronizable Electrical Performance Similar to AHF28XXD Series
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1
07/25/03
AMF28XXD Series
Specifications
Absolute Maximum Ratings
Input Voltage Range -0.5V to +50VDC Soldering Temperature 300C for 10 seconds Storage Case Temperature 65C to +135C Recommmended Operating Conditions Input Voltage Range +16V to +40VDC Output Power Less than or equal to 12W Operating Case Temperature -55C to +125C
Static Characteristics -55C TCASE +125C, VIN=28 VDC 5%, CL=0, unless otherwise specified.
Parameter
Input Voltage Output Voltage AMF2805D AMF2812D AMF2815D AMF2805D AMF2812D AMF2815D Output Current 1, 2 1 1 1 2, 3 2, 3 2, 3 Vin = 16, 28, 40 Volts each output each output each output Vin = 28 Volts, 100% load Vin = 28 Volts, 10% load on both outputs
Group A Subgroups
Test Conditions
Min
16
Nom
28
Max
40
Unit
V V V V V V V
4.95 5.00 5.05 11.88 12.00 12.12 14.85 15.00 15.15 4.90 11.76 14.70 240 100 80 5.10 12.24 15.30 2160 900 720 12 12 12 25 25 25 60 60 60
AMF2805D AMF2812D AMF2815D
1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3
mA mA mA W W W mVPP mVPP mVPP
Output Power 1, 2
AMF2805D AMF2812D AMF2815D
Output Ripple Voltage 1, 3 AMF2805D AMF2812D AMF2815D Output voltage Regulation 3 Line AMF2805D AMF2812D AMF2815D AMF2805D AMF2805D AMF2805D
Vin = 16, 28, 40 Volts, 100% load, BW = 20 Hz to 2 MHz
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 mV mV mV mV mV
Load
For Notes to Specifications, refer to page 5
2
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AMF28XXD Series
Static Characteristics
Parameter Cross Regulation
5
(Continued) -55C TCASE +125C, VIN=28 VDC 5%, CL=0, unless otherwise specified.
Group A Subgroups
Test Conditions Minimum 1.0 watt on both outputs 10%-90% load
Min
Nom
Max 10 3 3
Unit % %
AMF2805D AMF2812D AMF2815D
1, 2, 3 1, 2, 3 1, 2, 3
%
mA mA mA mA mA mA mAPP mAPP mAPP % % % % % % M
Input Current No Load
AMF2805D AMF2812D AMF2815D AMF2805D AMF2812D AMF2815D
1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 3 1, 3 1, 3 2 2 2 1
Vin=28V, Iout=0, Inhibit (pin 1)=open
35 35 35 8 8 8 20 20 20 76 77 78 72 74 74
60 60 60 12 12 12 50 50 50
Inhibit
Inhibit (pin 1) shorted to input return (pin 7) Vin = 16, 28, 40 Volts, 100% load, BW = 20 Hz to 2 MHz
Input Ripple Current 3 AMF2805D AMF2812D AMF2815D Efficiency3 AMF2805D AMF2812D AMF2815D AMF2805D AMF2812D AMF2815D Isolation Capacitive Load
5, 6
100% load
Input to output or any pin to case (except pin 6) at 500Vdc No effect on dc performance, total for both outputs
100
4 AMF2805D AMF2812D AMF2815D
500 200 200 6
F F F watts Khrs
Short Circuit Power Dissipation MTBF Weight
1, 2, 3 MIL-HDBK-217F, SF @ Tc=35C 750
36
g
For Notes to Specifications, refer to page 5
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AMF28XXD Series
Dynamic Characteristics -55C TCASE +125C, VIN=28 VDC 5%, CL=0, unless otherwise specified.
Parameter Short Circuit Recovery 6 AMF2805D AMF2812D AMF2815D Switching Frequency
3
Group A Subgroups 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6
Test Conditions 0% load to 100% Load
Min
Nom
Max 25 25 25
Unit ms ms ms KHz
100% load
500
550
600
Synchronization Input 3
Frequency Range Pulse Amplitude, Hi 6 Pulse Amplitude, Lo 6 Pulse Rise time 6 Pulse Duty Cycle 6 Output Response To Step Transient Load Changes 3, 7
4, 5, 6
500 2.5 -0.5 20
700 10 0.8 100 80
KHz V V ns %
4, 5, 6 4, 5, 6
Load step 50%o100% Load step 10% o 50%
-200 --800
+200 +800
mV pk mV pk
Recovery Time, Step Transient Load Changes 3, 7, 8
4, 5, 6 4, 5, 6
Load step 50%o100% Load step 10% o50% Input step 16o 40Vdc, 100% Load
70 2000
s s
Output Response Transient Step Line Changes 3, 6, 9 AMF2805D AMF2812D AMF2815D Recovery Time Transient Step Line Changes 3, 6, 9 Turn On Overshoot 3, 10
4, 5, 6 4, 5, 6 4, 5, 6 Input step 16 o 40Vdc, 100% load
-450 -750 -750
+450 +750 +750
mV pk mV pk mV pk
4, 5, 6
1200
s
All
4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6
0% load 100% load
600 400 300 300
mV pk mV pk mV pk mV pk ms
AMF2805D AMF2812D AMF2815D Turn On Delay 3, 10
4, 5, 6
0% load to 100% load
25
For Notes to Specifications, refer to page 5
4
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AMF28XXD Series
Notes to Specifications
1. 2. 3. 4. 5. Applicable to positive and negative outputs. Maximum combined output is 12 watts. 10.8 watts (max.) is available from either output (90%). Load current split equally between +VOUT and VOUT. 1.2 watt load on output under test, 1.2 watt to 10.8 watt load change on other output. 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 and 10 microseconds. 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 and 10 microseconds. 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.
AMF28XXD Block Diagram
8
+ In put
EMI F ilter
3
+ V out
4
R etu rn
1
E nable
6
P rim a ry H ouseke eping S upply
5
-V ou t
C ase
2
D rive
S ync
P uls e W idth FB M odulato r
CS
E rror Amp & R ef
In put R etu rn
7
Application Information
Inhibit Function
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 A 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 10.0 +1VDC.
Device Synchronization
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). Advanced Analog 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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AMF28XXD Series
Standard Process Screening for AMF28XXD Series
Requirement Temperature Range Element Evaluation Internal Visual Temperature Cycle Constant Acceleration PIND Burn-in Interim Electrical; @160 hrs Final Electrical (Group A) Read & Record Data PDA (25C, interim to final) Radiographic Inspection Fine & Gross External Visual MIL-STD-883 Method 2017 1010 2001 2020 1015 MIL-PRF-38534 & Specification 2012 1014 2009 CH+ Limits -55C to +125C MIL-PRF-38534 Yes Condition C Condition A, (3000g) Condition A 320 hrs @ +125C (2 x 160 hrs) -55C, +25C, +125C 2% Yes Condition A, C Yes
Radiation Specification
Parameter Total Ionizing Dose Heavy Ion (Single event effects)
Condition
MIL-STD-883, Method 1019.4 Operating bias applied during exposure BNL Dual Van de Graf Generator
Min
30 60
Typ

Max

Unit
KRads (Si) MeV *cm /mg
2
6
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AMF28XXD Series
AMF28XXD Case Outline
1.130 O 0.140
0.17
0.03D x 0.25L 8 P ins
6
1.850 1.600
4
5
2.10 1.000 0.800 0.600 0.400
7
8
1
2
3
0.19 0.33 1.380
Tolerance unless otherwise specified: x.xx 0.010 x.xxx 0.005
Pin Designation
Pin No. 1 2 3 4 5 6 7 8 Designation Enable Sync Input Positive Output Output Return Negative Output Case Ground Input Return Positive Input
Part Numbering
AMF 28 05 D / EM
Model Input Voltage
28 = 28V
Screening
Blank = Flight Model (CH+) /EM = Engineering Model
Outputs
S = Single D = Dual
Output Voltage
05 = 5V, 12 = 12V, 15 = 15V
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. 07/03
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