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.



LT-55( )
& LT-57( ) Series

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:

LT-55( ) Series

LT-57( ) Series
Input Voltage: 28 VDC nom., 2.0 TO 36 VDC. 28 VDC nom., 22.5 TO 36 VDC.
Output Voltage: 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.
 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: 0 to 15 ADC continuous. 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