| The LT-53, LT-73 and LT-103 are pulse width-modulated DC to DC converters
that provide regulated power. These converters transform an unregulated 28 VDC to a regulated and adjustable DC output via a remote control voltage; 0 to 5 VDC typical or 0 to 28 VDC. The LT-Series are used to control the light intensity of incandescent bulbs in aircraft instrument lighting when voltage control is required. |
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Features:
Specifications:
Input Voltage: 28 VDC nom., 20 to 40 VDC. Output Voltage: Adjustable with external voltage from 0 to 5 VDC. Regulation: 2% for line, 2% load and 2% temperature. Output Ripple: 25 mVp-p. Protection (Overload): Input and output current pulse when overload exceeds approximately 125% of rating. Protection (Overvoltage): Output voltage is limited to approximately 125% of rating eventhough remote control rheostat opens or shorts, or internal failure occurs. Temperature: -55°C to +71°C (sufficient cooling required @ +71°C ambient) Altitude: 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 LWeight: 1.5 lbs. (683 grams). Compliance: FAA TSO-C71
| Characteristics | LT-53 | LT-73 | LT-103 |
| Max VA Rating | 50 | 70 | 100 |
| Input Voltage (VDC) | 20 to 40 | 20 to 40 | 20 to 40 |
Input Current (ADC)
|
3.7 |
4.0 |
5.8 |
| Output Voltage (VDC) | 0 to 5 | 0 to 12 | 0 to 28 |
| Output Current (ADC) | 10 | 5.8 | 3.6 |
| Efficiency | 73 | 78 | 84 |
Pin Descriptions: |
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| 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 | 0 to 5 VDC |
| E | Remote Control | 0 to 28 VDC |
Connectors: |
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| Model | Mating Plug | Receptacle |
| LT-53 | KPT-06A-14-5S | PT-02E-14-5P |
| LT-73 | MS3106A14S-5S-X | MS3102A14S-5P-X |
| LT-103 | MS3106A14S-5S | MS3102A14S-5P |
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