LT-50
REGULATED DC TO DC POWER CONVERTER
28Vdc to 5Vdc 7.5Amps Continuous Output Power
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.
Specifications
Input Voltage
28Vdc
28Vdc
Normal Range
18Vdc to 40Vdc
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
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
0-5Vdc regulated
Current
0-7.5 Amps Continuous
8.2 Amps Max @ 5 Vdc
0-7.5 Amps Continuous
8.2 Amps Max @ 5 Vdc
Power
40 Watts maximum continuous at 5 Vdc output
40 Watts maximum continuous at 5 Vdc output
Regulation
2% for line, 3% for load and 3% for temperature
2% for line, 3% for load and 3% for temperature
Ripple
50mVpp Maximum
50mVpp Maximum
Control
0-5Vdc outputs are controlled by an external 5Kohm 1/2W linear pot
0-5Vdc outputs are controlled by an external 5Kohm 1/2W linear pot
Overload (OL)
Deliver 110% output current at least for 5 minutes
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.
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.
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.
Output voltage is limited to 6.5 Vdc max.
Efficiency
83% typical
83% typical
Temperature
-55°C to +71°C
-55°C to +71°C
Altitude
Up to 55,000FT
Up to 55,000FT
Finish
Gold iridite per MIL-C-5541 Class 3
Gold iridite per MIL-C-5541 Class 3
Weight:
1.1 LBS (499grams)
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
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
