LT-4X SERIES
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.
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.
28 VDC nom., See Table.
Input Current
See Table
See Table
Output Voltage Regulated
See Table. Variable and Regulated
See Table. Variable and Regulated
Output Ripple
8 mVpp typ. @ 25°C,25 mVpp maximum.
8 mVpp typ. @ 25°C,25 mVpp maximum.
Regulation
2% for line, 2% load and 2% temperature.
2% for line, 2% load and 2% temperature.
Output Control
Adjustable with external 5k ohm,1/2 W linear pot (rheostat)
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.
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.
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
Input has reverse polarity diode in shunt to open 3 to 5 Amp. input C.B.and clip negative transients
Efficiency
See Table.
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.
-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
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).
0.6 lbs. (272 grams).
Compliance
FAA TSO-C71
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 |
