AMA28XXD SERIES

5

2016-05-18

Radiation Specifications

Block Diagram

Application Information

Inhibit Function

Connecting the inhibit input (Pin 5) 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 mA of

current. The open

EMI Filter

An optional EMI filter is available (ASF461 or AFH461) will

reduce the input ripple current to levels below the limits

imposed by MIL-STD-461 CE03. 

6

+Input

7

Input

Return

Housekeeping

Supply

1 +Output

3 -Output

Error

Amplifier

Controller

CS

5

Inhibit

8 Case

2 Output

Return

Thermal Considerations

Irrespective of the fact that the AMA28XXD series of

converters are relatively low power devices and are

designed to provide efficient voltage conversion, there

will be some heat generated during normal operation.

To avoid a continuous thermal rise that may eventually

exceed the maximum case temperature rating and to

maintain a safe operating environment for the internal

components, these converters should be attached to a

heat conducting surface allowing a continuous flow of

the heat away from the base plate. This becomes more

important

when

operating

in

the

near

vacuum

environment of space which provides no alternate heat

radiating path.

Parameter

Condition

Min

Typ

Max

Unit

Total Ionizing Dose

MIL-STD-883, Method 1019.4

Operating bias applied during exposure

25

kRads (Si)

Heavy Ion

(Single event effects)

BNL Dual Van de Graf Generator

60

IR HiRel currently does not have a DLA certified Radiation Hardness Assurance Program.