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PD - 94689
AMF28XXS SERIES ADVANCED ANALOG RADIATION TOLERANT DC/DC CONVERTERS
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 Advanced Analog 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. Advanced Analog'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. Finished product are fabricated in a facility fully qualified to MIL-PRF-38534. The standard processing adopted for the AMF28XXS 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, Single Output
AMF Features
n n n n n n n n n n n n n n 12 Watts Output Power Available in 3.3, 5, 12 and 15 Volt Outputs 16 - 40 VDC Input Range (28 VDC Nominal) Low Input/Output Noise Total Ionizing Dose > 25KRads (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 Synchronizable From An External Source Electrical Performance Similar to AHF28XXS Series
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1
07/25/03
AMF28XXS Series
Specifications
Absolute Maximum Ratings
Input Voltage Range Soldering Temperature Storage Case Temperature -0.5V to +50VDC 300C for 10 seconds 65C to +135C +16V to +40VDC Less than or equal to 12W -55C to +125C
Recommended Operating Ratings
Input Voltage Range Output Power Operating Case Temperature
Static Characteristics -55C TCASE +125C, VIN=28 VDC 5%, CL=0, unless otherwise specified.
Parameter Input Voltage Output Voltage AMF2803R3S AMF2805S AMF2807R5SS AMF2812S AMF2815S AMF2803R3S AMF2805S AMF2807R5SS AMF2812S AMF2815S Output Current
1
Group A Subgroups
Test Conditions
Min 16
Nom 28 3.30 5.00 7.50 12.00 15.00
Max 40 3.35 5.05 7.58 12.12 15.15 3.40 5.10 7.65 12.24 15.30 3000 2400 1600 1000 800 10 12
Unit V V V V V V V V V V V mA mA mA mA mA W W mVPP
1 1 1 1 1 2, 3 2, 3 2, 3 2, 3 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
Vin = 28 Volts, 0% load
3.25 4.95 6.97 11.88 14.85 3.20 4.90 7.35 11.76 14.70
AMF2803R3S AMF2805S AMF2807R5SS AMF2812S AMF2815S AMF2803R3S All Others
2
Vin = 16, 28, 40 Volts
0 0 0 0 0
Output Power 1
Vin = 16, 28, and 40 V dc
Output Ripple Voltage
Vin = 16, 28, 40 Volts, BW = 20 Hz to 2 MHz Vin = 16, 28, 40 Volts Iout = 0%, 50%, and 100% max
25
60
Output Voltage Regulation Line Line AMF2803R3S AMF2805S AMF2807R5SSS AMF2812S AMF2815S Load All
1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3
10 10 10 10 10 10
25 25 50 50 50 50
mV mV mV mV mV mV
For Notes to Specifications, refer to page 5
2
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AMF28XXS Series
Static Characteristics
Parameter Input Current No Load Inhibit Input Ripple Current Efficiency
(Continued) -55C TCASE +125C, VIN=28 VDC 5%, CL=0, unless otherwise specified.
Group A Subgroups 1, 2, 3 1, 2, 3
Test Conditions Vin=28V, Iout=0, Inhibit (pin 1)=open Inhibit (pin 1) shorted to input return (pin 7) Vin = 16, 28, 40 Volts, 100% load, BW = 20 Hz to 2 MHz 100% load
Min
Nom 20 8
Max 30 12
Unit mA mA
1, 2, 3 1, 3 1, 3 1, 3 1, 3 1, 3 2 2 2 2 2 1
20 72 76 77 78 78 70 72 73 75 75
50
mAPP % % % % % % % % % % M
AMF2803R3S AMF2805S AMF2807R5S AMF2812S AMF2815S AMF2803R3S AMF2805S AMF2807R5S AMF2812S AMF2815S
Isolation Capacitive Load 3, 4 AMF2803R3S AMF2805S AMF2807R5S AMF2812S AMF2815S Short Circuit Power Dissipation Short Circuit Recovery 4
Input to output or any pin to case (except pin 6) at 500Vdc
100
4 4 4 4 4 1, 2, 3
No effect on dc performance
500 500 300 200 200 6
F F F F F watts
4, 5, 6 Switching Frequency MTBF Weight 4, 5, 6
0% load to 100% Load 100% load MIL-HDBK-217F SF @ Tc = 35C 500 750 550
20 600
ms KHz Khrs
36
g
For Notes to Specifications, refer to page 5
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AMF28XXS Series
Dynamic Characteristics
Parameter Synchronization Input Frequency Range Pulse Amplitude, Hi 4 Pulse Amplitude, Lo 4 Pulse Rise time 4 Pulse Duty Cycle 4 Output Response To Step Transient Load Changes 5
-55C TCASE +125C, VIN=28 VDC 5%, CL=0, unless otherwise specified.
Subgroups
Group A
Test Conditions
Min 500 2.5 -0.5 20
Nom
Max 700 10 0.8 100 80
Unit KHz V V ns %
4, 5, 6
All
4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6
Load step 50%o100% Load step 0% o50%
-300 -400 -500 -750 -750 -750
+300 +400 +500 +750 +750 +750
mV pk mV pk mV pk mV pk mV pk mV pk
AMF2803R3S AMF2805S AMF2807R5S AMF2812S AMF2815S Recovery Time, Step Transient Load Changes 5, 6 AMF2803R3S AMF2805S AMF2807R5S AMF2812S AMF2815S All Output Response Transient Step Line Changes 4, 7 AMF2803R3S AMF2805S AMF2807R5SS AMF2812S AMF2815S Recovery Time Transient Step Line Changes 4, 7 Turn On Overshoot 8 AMF2803R3S AMF2805S AMF2807R5SS AMF2812S AMF2815S
4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6
Load step 50%o100%
70 70 100 100 100 2
S s s s s mS
Load step 0% o 50% Input step 16 40Vdc 100% Load
4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6
-500 -500 -1200 -1500 -1500
+500 +500 +1200 +1500 +1500 800
mV pk mV pk mV pk mV pk mV pk s
Input step 16 40Vdc, 100% load 0% load to 100% load
4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6
400 600 600 600 750 20
mV pk mV pk mV pk mV pk mV pk ms
Turn On Delay 8
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 20 Hz to 2 MHz. 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 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 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.
AMF28XXS Block Diagram
8
+Input
EMI Filter
U nder-V oltage D etector
3
+V out
1
E nable
6
P rim ary H ousekeeping S upply
4
R eturn
C ase
2
D rive
S ync
P ulse W idth FB M odulator
CS
E rror Amp & R ef
Input R eturn
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. The open circuit voltage of the enable input is 10.0 +1 VDC.
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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AMF28XXS Series
Standard Process Screening for AMF28XXS Series
Requirement Temperature Range Element Evaluation Internal Visual Temperature Cycle Constant Acceleration PIND Burn-in, Tcase = +125C Interim Electrical Burn-in, Tcase = +125C Final Electrical (Group A) PDA (25C, interim to final) Radiographic Inspection Fine & Gross External Visual 2012 1014 2009 Y MIL-PRF-38534 & Specification 48 hrs -55C, +25C, +125C Read & Record Data 2017 1010 2001 2020 1015 MIL-STD-883 Method Engineering Model (/EM) -55C to +125C Y CH+ Limits (No-Suffix) -55C to +125C MIL-PRF-38534 u Condition C Condition A, (3000g) Condition A 160 hrs + 25C 160 hrs -55C, +25C, +125C Read & Record Data 2% Yes Condition A, C Yes
Y Per IR internal standards
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 25 60 Typ Max Unit KRads (Si) MeV *cm /mg
2
6
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AMF28XXS Series
AMF28XXS 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 Common N/C Case Ground Input Return Positive Input
Part Numbering
AMF 28 05 S / EM
Model Input Voltage
28 = 28V
Screening
Blank = Flight Model (CH+) /EM = Engineering Model
Output Voltage
03R3 = 3.3V, 05 = 5V, 12 = 12V, 15 = 15V
Outputs
S = Single D = Dual
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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