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:

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

OUTLINE DRAWING

EXTERNAL WIRING:  
LT-55( ),  LT-55(A),  LT-55(B),  LT-55(D),  LT-57(F)
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