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

OUTLINE DRAWING

EXTERNAL WIRING:

FAA TSO REGULATED DC TO DC CONVERTER HIGH POWER LIGHT DIMMER

OUTLINE DRAWING

FAA TSO REGULATED DC TO DC CONVERTER
HIGH POWER LIGHT DIMMER