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LT73 Converter DC to DC
Light Dimmer with External Voltage Control
(KGS products can only be shipped to U.S. address only.)
(DAI Part# LT73)
The LT-53, LT-73 and LT-103 are pulse width-modulated DC to DC converters that provide regulated power.

These converters transform an unregulated 28 VDC to a regulated and adjustable DC output via a remote control voltage; 0 to 5 VDC typical or 0 to 28 VDC.

The LT-Series are used to control the light intensity of incandescent bulbs in aircraft instrument lighting when voltage control is required.


Features:
State of the art design for regulation and positive logic for output overvoltage protection.
Other voltage control range is available.
The Model LT-Series is serviceable, small and lightweight (33 watts per pound and 1.7 watts per cubic inch).
Maximum output voltage 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.


Connectors:
ModelMating PlugReceptacle
LT-53KPT-06A-14-5SPT-02E-14-5P
LT-73MS3106A14S-5S-XMS3102A14S-5P-X
LT-103MS3106A14S-5SMS3102A14S-5P
SPECIFICATIONS
DRAWING
WIRING
INPUT/OUTPUT VOLTAGE
Input Voltage: 28 VDC nom., 20 to 40 VDC.
Output Voltage: Adjustable with external voltage from 0 to 5 VDC.
Regulation: 2% for line, 2% load and 2% temperature.
Output Ripple: 25 mVp-p.
Protection (Overload): Input and output current pulse when overload exceeds approximately 125% of rating.
Protection (Overvoltage): Output voltage is limited to approximately 125% of rating eventhough remote control rheostat opens or shorts, or internal failure occurs.
Temperature: -55°C to +71°C (sufficient cooling required @ +71°C ambient)
Altitude: 55,000 Feet.
Size: 2.3" H x 2. 3" W x 5.8" L., 5.7 cm H x 5.7 cm W x 14.6 cm L
Weight: 1.5 lbs. (683 grams).
Compliance: FAA TSO-C71


CharacteristicsLT-53LT-73LT-103
Max VA Rating5070100
Input Voltage(VDC)20 to 4020 to 4020 to 40
Input Current(ADC) @20VDC In3.74.05.8
Input Current(ADC) @28VDC In2.53.24.2
Output Voltage(VDC)0 to 50 to 120 to 28
Output Current(ADC)105.83.6
Efficiency737884


PIN NO.DescriptionRemarks
A+28 VDC input20 to 40 VDC
BCommon GroundInput/output return
C+VDC OutputAdjustable DC Output
DRemote Control0 to 5 VDC
ERemote Control0 to 28 VDC
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