LT-52(A), LT-70, LT-100
FAA TSO-C71 REGULATED DC TO DC CONVERTER
LIGHT DIMMER
The LT-SERIES is a pulse width-modulated DC to DC converter that provides regulated DC power. This converter transforms an unregulated 28 VDC to a regulated and adjustable DC voltage output via a remote control potentiometer.
The LT-SERIES is primarily designed to control the light intensity of incandescent bulbs in aircraft lighting. The LT-52A, LT-70 and LT-100 converters are FAA TSO-C71 recognized for airborne applications.
Features:
- State of the art design for regulation and positive logic for output overvoltage protection.
- State of the art design for regulation and positive logic for output overvoltage protection.
- Other LT-SERIES available in various output voltages and power ratings in the same package size.
- The LT-SERIES is serviceable, small and lightweight.
- Maximum output voltage is adjustable with an internal trim pot.
- Designed to meet various applicable portions MIL-STD 704 notice 3, MIL-STD-202C and MIL-T-5422F class 1A.
Specifications
Input Voltage
28 VDC nom., 20 TO 40 VDC.
28 VDC nom., 20 TO 40 VDC.
Output Voltage
Adjustable with external 5K ohm, 1/2 W rheostat
Adjustable with external 5K ohm, 1/2 W rheostat
Regulation
2% for line, 2% load and 2% temperature.
2% for line, 2% load and 2% temperature.
Output Ripple
25 mVp-p.
25 mVp-p.
Protection (Overload)
Input and output current pulse when overload exceeds approximately 125% of rating.
Input and output current pulse when overload exceeds approximately 125% of rating.
Protection (Overvoltage)
Output voltage is limited to approximately 125% of rating even though remote control rheostat opens or shorts, or internal failure occurs.
Output voltage is limited to approximately 125% of rating even though remote control rheostat opens or shorts, or internal failure occurs.
Temperature
-55°C to +71°C (sufficient cooling required @ +71°C ambient)
-55°C to +71°C (sufficient cooling required @ +71°C ambient)
Altitude
To 55,000 Feet.
To 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
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).
1.5 lbs. (683 grams).
Compliance
FAA TSO-C71
FAA TSO-C71
| Characteristics | LT-52A | LT-70 | LT-100 |
| Max VA Rating | 50 | 70 | 100 |
| Input Voltage (VDC) | 20 to 40 | 20 to 40 | 20 to 40 |
| Input Current (ADC) @20 VDC In @ 28 VDC In |
3.2 2.3 |
4.0 3.2 |
5.8 4.2 |
| Output Voltage (VDC) | 0 to 5 | 0 to 12 | 0 to 28 |
| Output Current (ADC) | 10 | 5.8 | 3.6 |
| Efficiency | 77 | 78 | 84 |
| Pin Description: | ||
| PIN NO. | Description | Remarks |
| A | +28 VDC input | 20 to 40 VDC |
| B | Common Ground | Input/output return |
| C | + VDC Output | Adjustable DC Output |
| D | Remote Control | 5K ohm rheostat to ground. |
| E | Spare | NC |
| Model | Mating Plug | Receptacle |
| LT-52A | KPT-06A-14-5S | PT-02E-14-5P |
| LT-70 | MS3106A14S-5S-X | MS3102A14S-5P-X |
| LT-100 | MS3106A14S-5S | MS3102A14S-5P |
