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5

AMA28XXS Series

Block Diagram

Application Information

Inhibit Function (Enable)

Connecting the enable 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

µA of current. The open circuit voltage of the inhibit

input is 10 +1.0 V

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.

EMI Filter

Radiation Specification

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

—

—

MeV

•cm

2

/mg

International Rectifier currently does not have a DSCC certified Radiation Hardness Assurance Program.

Controller

Error

Amplifier

8

6

7

5

Case

Enable

Input

Return

+Input

CS

Housekeeping

Supply

1

2

Output

Return

+Output