AMF28XXXXS SERIES

(28V Input, Single Output)

5

2016-05-16

Radiation Specifications

Block Diagram

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

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.

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.

3

4

+Output

Output

Return

Pulse Width

Modulator

Primary

Housekeeping

Supply

EMI

Filter

Under-Voltage

Detector

8

1

2

7

+Input

Enable

Sync

Input

Input

Return

Error

Amp &

Ref

FB

CS

Drive

6

Case