MIL & FAA TSO APPROVED

REGULATED DC TO DC POWER CONVERTER

LT 4XThe LT-4X (Series) 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-4X (Series) is primarily designed to control the light intensity of incandescent bulbs in aircraft lighting. The LT-4X (Series) are qualified to the FAA technical standards order (TSO-C71) for airborne static DC-DC electrical power converters.

Features:

  • State of the art design for regulation and positive logic for output overvoltage protection (PWM control topology).
  • The LT-4X (SERIES) 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.
Specifications:
Input Voltage: 28 VDC nom., See Table.
Input Current:: See Table.
Output Voltage Regulated: See Table. Variable and Regulated
Output Ripple: 8 mVpp typ. @ 25°C,25 mVpp maximum.
Regulation: 2% for line, 2% load and 2% temperature.
Output Control: Adjustable with external 5k ohm,1/2 W linear pot (rheostat)
Protection (Overvoltage): Output voltage is limited to approximately 125% even though remote control rheostat opens or shorts or certain types of internal failures occur.
Protection (Overload): 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
Efficiency: See Table.
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.
Size: 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
Weight: 0.6 lbs. (272 grams).
Compliance: FAA TSO-C71

 

CHARACTERISTICS: LT-48 (SERIES) LT-46 (SERIES) LT-45 (SERIES) LT-45(D) LT-46(C) LT-48(D)* LT-48(E)
Output (Watts) 37.5 50 70 100 50 50 50
Vin (VDC) Range
lin (ADC) @ 28 VDC
18-36
1.8
20-36
2.2
22-36
2.9
22-36
4.3
20-36
2.2
18-36
2.4
20-36
2.4
Vout (VDC) Range
Iout (ADC) Max.
0-5
7.5
0-12
4.1
0-28
2.5
0-28
3.6
12 Fixed
4.2
0-5
10.0
0-5
10
Efficiency (%) 75 80 83 83 83 75 75
Input Circuit Breaker 3-5 amp 3-5 amp 4-5 amp 5-6 amp 3-5 amp 4-5 amp 3-5 amp

 

MODEL MATING PLUG RECEPTACLE
LT-4X( ) MS3106E14S-5S MS3102A14S-5P
LT-4X(A) MS3126E14-5S KPT02A14-5P
LT-4X(B) MS27473T-10B-5S JT02A-10-5P- (O14)
LT-45(D) MS3106A14S-5S MS3102A14S-5P
LT-46(C) MS3126W14-5S KPT02A14-5P
LT-48(D) MS3126E14-5S KPT02A14-5P
LT-48(E) MS3126E14-5S KPT02A14-5P

 

Outline Drawing | External Wiring