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LT103 Converter DC to DC
Light Dimmer with External Voltage Control
(KGS products can only be shipped to U.S. address only.)
(DAI Part# LT103)
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:
 | State of the art design for regulation and positive logic for output overvoltage protection.
| | Other voltage control range is available.
| | The Model LT-Series is serviceable, small and lightweight (33 watts per pound and 1.7 watts per cubic inch).
| | Maximum output voltage is adjustable with an internal trim pot.
| | Designed to meet various applicable portions MIL-STD 704 notice 3, MIL-STD-202 and MIL-T-5422F class 1A.
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Connectors:
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SPECIFICATIONS DRAWING WIRING INPUT/OUTPUT VOLTAGE |
| 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 L |
| Weight: |
1.5 lbs. (683 grams). |
| Compliance: |
FAA TSO-C71 |
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| Max VA Rating | 50 | 70 | 100 |
| Input Voltage(VDC) | 20 to 40 | 20 to 40 | 20 to 40 |
| Input Current(ADC) @20VDC In | 3.7 | 4.0 | 5.8 |
| Input Current(ADC) @28VDC In | 2.5 | 3.2 | 4.2 |
| Output Voltage(VDC) | 0 to 5 | 0 to 12 | 0 to 28 |
| Output Current(ADC) | 10 | 5.8 | 3.6 |
| Efficiency | 73 | 78 | 84 |
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| 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 |
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