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dc2150af

DEMO MANUAL DC2150A

DESCRIPTION

LTC4366-2/LT4363-2

28V MIL-STD-1275D Surge Stopper

Demonstration circuit 2150A uses the LTC®4366-2 and

LT4363-2 surge stoppers to satisfy MIL-STD-1275D. This

specification, created by the United States Department of

Defense, sets down requirements of electrical systems

powered from a military vehicle’s 28V power supply.

DC2150A’s output voltage is limited to 44V when faced

with MIL-STD-1275D’s onerous surge, spike, and ripple

conditions. In most circumstances, satisfying MIL-STD-

1275D is as simple as placing this circuit in front of a 44V

tolerant device. The default version, DC2150A-C, provides

a minimum of 4A to the output in all conditions except the

±7V ripple condition (14Vpeak-to-peak). During the ripple

condition, DC2150A-C provides a minimum of 2.8A to the

load. Exceeding 2.8A during the input ripple condition

may cause DC2150A-C to timeout and shutoff in less than

L

, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

PERFORMANCE SUMMARY

MIL-STD-1275D’soneminuterippleride-throughrequire-

ment. DC2150A’s MOSFETs are protected against output

overloads by current limiting. Sustained overvoltage or

overcurrent conditions cause the circuit to turn off after a

timer delay. It automatically retries after a cooldown cycle.

DANGER! HIGH VOLTAGE TESTING SHOULD BE

PERFORMED BY QUALIFIED PERSONNEL ONLY.

AS A SAFETY PRECAUTION AT LEAST TWO PEOPLE

SHOULD BE PRESENT DURING HIGH VOLTAGE

TESTING.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2150A

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Supply

Operating

8

28

40

V

500ms Surge

100

V

Survival (with Optional TVS Removed)

–250

250

V

Output Regulation Voltage

41

43.6

46

V

Current Limit

4.4

5

5.6

A