MIL & FAA TSO APPROVED
REGULATED DC TO DC POWER CONVERTER

The 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.











LT-4X (SERIES)
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

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