LT-55, LT-57 Series
FAA TSO REGULATED DC TO DC CONVERTER
HIGH POWER LIGHT DIMMER
The LT-55( ) and LT-57( ) Series are pulse width-modulated DC to DC converters that provide regulated high power DC.
These converters transform an unregulated 28 VDC to a regulated fixed or adjustable DC output via a remote control potentiometer.
The LT-55( ) Series is primarily designed to control the light intensity of incandescent bulbs in aircraft instrument lighting when requiring 0-15 amperes at 5 VDC output.
Model LT-57( ) Series is designed for 0-10 amperes up to 13.75 VDC output.
Features:
- State of the art design for regulation and positive logic for output overvoltage protection.
- Maximum output voltage is adjustable with an internal trim pot.
- Maximum current limit is adjustable with an internal trim pot.
- Designed to meet various applicable portions MIL-STD 704 notice 3, MIL-STD-202 and MIL-T-5422F class 1A.
Specifications
Input Voltage:
LT-55( ) Series
28 VDC nom., 2.0 TO 36 VDC.
LT-57( ) Series
28 VDC nom., 22.5 TO 36 VDC
LT-55( ) Series
28 VDC nom., 2.0 TO 36 VDC.
LT-57( ) Series
28 VDC nom., 22.5 TO 36 VDC
Output Voltage
LT-55( ) Series
0 to 5 VDC adjustable:
LT-55( ) Series
0 to 5 VDC adjustable:
- LT-55( ) -10K 1/2W rheostat.
- LT-55(A)-300 ohm to 10K 1/2W potentiometer.
- LT-55(B)-0-5 VAC or 0-5 VDC voltage control.
- LT-55(F)-Fixed @ 5 VDC.
Output Voltage
LT-57( ) Series
0 to 13.75 VDC adjustable:
LT-57( ) Series
0 to 13.75 VDC adjustable:
- LT-57( )-10K 1/2W rheostat.
- LT-57(A)-300 ohm to 10K 1/2W potentiometer.
- LT-57(B)-0-5 VAC or 0-5 VDC voltage control.
- LT-57(F)-Fixed @ 13.75 VDC.
Output Current
LT-55( ) Series: 0 to 15 ADC continuous.
LT-57( ) Series: 0 to 10 ADC continuous.
LT-55( ) Series: 0 to 15 ADC continuous.
LT-57( ) Series: 0 to 10 ADC continuous.
Regulation
2% for line, 2% load and 2% temperature.
2% for line, 2% load and 2% temperature.
Weight
1.2 lbs. (545 grams).
1.2 lbs. (545 grams).
Compliance
FAA TSO-C71
FAA TSO-C71
