The LT-50 is primarily designed to power 5V incandescent lamp loads for airborne/ground instruments, navigation and other critical electronic systems. 

The LT-50 converts 28Vdc input to 0-5Vdc output with up to 7.5 amps continuous output power, 37.5 watts total power.

Control circuitry design includes use of a popular PWM controller for voltage regulation and output current limit.  Protection circuitry design includes low input voltage shutdown, softstart, high input voltage shutdown, output overvoltage limiting and output short circuit current limiting.

Model  LT-50

Specifications: 

Input Voltage:  

28Vdc

Normal Range:

18Vdc to 40Vdc

Current:

1.8 Amps typical (2.0 Amp Max) @ 28Vdc input & at 7.5A full load

2.2 Amps Max at 8.2 Amp load at 28 Vdc input

0.10 Amp maximum at no load

Output Voltage:

0-5Vdc regulated

Current:

0-7.5 Amps Continuous

8.2 Amps Max @ 5 Vdc

Power:

40 Watts maximum continuous at 5 Vdc output

Regulation:

2% for line, 3% for load and 3% for temperature

Ripple:

50mVpp Maximum

Control:

0-5Vdc outputs are controlled by an external 5Kohm 1/2W linear pot

Overload(OL):

Deliver 110% output current at least for 5 minutes

Protection(OL):

Withstands without damage or degradation load exceeding 110% to an output short circuit.  Unit delivers rated output power upon removal of the oveload (OL) condition.

Protection(SC):

Under the output short circuit condition, the input current folds back and the output current is limited to below 10.5 Amps.

Protection(OV):

Output  voltage is limited to 6.5 Vdc max.

Efficiency:

83% typical

Temperature:

 -55°C to +71°C

Altitude:

Up to 55,000FT

Finish:

Gold iridite per MIL-C-5541  Class 3

Weight:

1.1 LBS (499grams)

Size:

2.00 H  x  2.26 W  x  6.88 L  inches

50.80 H  x  57.40 W  x  174.75 L  mm  .

Less protrusion of connector and screw heads

OUTLINE DRAWING

EXTERNAL WIRING