AMF2805S Datasheet, PDF (5/8 Pages) International Rectifier – HYBRID-HIGH RELIABILITY RADIATION TOLERANT DC-DC CONVERTER

AMF28XXXXS SERIES
(28V Input, Single Output)
8
+Input
EMI
Filter
Under-Voltage
Detector
1
Enable
6
Case
2
Sync
Input
Input
Return
7
Block Diagram
Primary
Housekeeping
Supply
Drive
Pulse Width
Modulator
FB
CS
+Output
3
Output
Return
4
Error
Amp &
Ref
Application Information
Inhibit Function (Enable)
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. Because it is
internally pulled up, the open circuit voltage of the enable
input is 10 +1.0 V_DC.
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.
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). IR HiRel provides synchronization of multiple
AMF type converters to match switching frequency of the
converter to the frequency of the system clock, thus elimi-
nating this type of noise.
Radiation Specifications
Parameter
Condition
Total Ionizing Dose
Heavy Ion
(Single event effects)
MIL-STD-883, Method 1019.4
Operating bias applied during exposure
BNL Dual Van de Graf Generator
Min Typ
25
60
IR HiRel currently does not have a DLA certified Radiation Hardness Assurance Program.
5
Max
Unit
kRads (Si)
MeV·cm²/mg
2016-05-16