Country of Origin
Schedule B Code
The LT-48 is a pulse width-modulated DC to DC converter that provides regulated output power. This converter transforms an unregulated 28 VDC to regulated output power. The output voltage is adjusted via a remote control rheostat 5K ohm 1/2 W to ground. Fixed output and voltage control models are also available.
The LT-48 is primarily designed to control the light intensity of incandescent bulbs in aircraft lighting. The LT-48 are qualified to the FAA technical standards order (TSO-C71) for airborne static DC-DC electrical power converters.
- State of the art design for regulation and positive logic for output overvoltage protection (PWM control topology).
- The LT-48 is serviceable, small and lightweight.
- Maximum output voltage is adjustable with an internal trim pot.
- Designed to meet MIL-STD 704 Cat. B, MIL-STD-810C and MIL-STD-461A.
28 VDC nom., 18-36
@28 VDC 1.8 AMP
Input circuit breaker:
Output Voltage Regulated:
0-5 Variable and Regulated
8 mVpp typ. @ 25°C,25 mVpp maximum.
2% for line, 2% load and 2% temperature.
Adjustable with external 5k ohm,1/2 W linear pot (rheostat)
Output voltage is limited to approximately 125% even though remote control rheostat opens or shorts or certain types of internal failures occur.
Output current limit when overload exceeds 125% of rating.
Protection (Reverse Polarity):
Input has reverse polarity diode in shunt to open 3 to 5 AMP. input C.B.and clip negative transients
Temperature & Altitude:
-50°C to +70°C @ mounting flange and at 55,000 ft.MIL-STD-810C Temperature and Altitude,Method 504.1, Proc 1, Cat 5.
1.6" H x 2.0" W x 5.0" L.
4.1 cm H x 5.1 cm W x 12.7 cm L
0.6 lbs. (272 grams).