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REGULATED AC TO DC POWER
CONVERTER
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Pot Control Models:
LT-252-400-4,
LT-270-400, LT-2100-400
Voltage Control Models:
LT-253-400, LT-253A-400, LT-273-400, LT-2103-400 |
These converters transform an unregulated 115 VAC 400 Hz to a regulated and adjustable
DC output via a remote control potentiometer or voltage for voltage controlled models.
The LT-2XX-400 Series is a pulse width-modulated AC to DC converter that provides
regulated DC power output.
The LT-2XX-400 Series is primarily designed to control the light intensity of
incandescent bulbs in vehicle lighting systems. For special orders any two
combinations of LT-52A, LT-53, LT-70, LT-73, LT-100 and LT-103 dimmer units may be
configured in a single box.
Features:
- State of the art design for regulation and positive logic for output overvoltage
protection.
- Other LT-2XX-400 Series available in various output voltage and power ratings in the
same package, or special units can be provided for various output combinations.
- A panel mount trim pot is provided for the voltage control series to control 0-5 VDC
output via 0-3 to 0-5 VDC.
- A test jack is provided to monitor output voltage.
- Designed to meet various applicable portions MIL-STD 704 notice 3, MIL-STD-202 and
MIL-T-5422F class 1A.
- The Model LT-2XX-400 Series is serviceable, small and lightweight (42 watts per pound
and 1.7 watts per cubic inch)
Specifications: |
| Input Voltage: |
115 VAC ± 10% @ 400 Hz. |
| Output Voltage: |
Adjustable with external 5K ohm, 1/2W rheostat or
voltage 0-3 VDC to 0-5 VDC. |
| Regulation: |
2% for line, 2% load and 2% temperature. |
| Output Ripple: |
25 mVp-p or less. |
| Protection (Overload): |
Input and output currents 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 internal failure occurs. |
| Temperature: |
-55°C to +71°C (sufficient cooling required @ +71°C
ambient) |
| Altitude: |
55,000 Feet. |
| Size: |
6.5" L x 6.7" W x 2.4" H.
16.5 cm L x 17 cm W x 6 cm H |
| Weight: |
3.6 lbs. (1634 grams). |
| LT-2XX-400 SERIES |
LT-252-400-4
LT-253-400 |
LT-270-400
LT-273-400 |
LT-2100-400
LT-2103-400 |
LT-253A-400 |
| Max. Power Rating (watts) |
100 |
150 |
200 |
75 |
| Input Voltage (VAC) @ 400 HZ |
105-125 |
105-125 |
105-125 |
105-125 |
| Input Current (ARMS) @ FL @ 115 VAC |
1.6 |
2.0 |
2.8 |
1.2 |
| Output Voltages DC two parallel |
0 to 5 |
0 to 12 |
0 to 28 |
0 to 5 |
| Output Current (ADC) Total |
0-20 |
0-12 |
0-7 |
0-15 |
CONNECTOR |
| PIN NUMBER |
DESCRIPTION J1 |
REMARKS |
| A |
115 VAC 400Hz AC input |
105 VAC to 125VAC |
| B |
400Hz AC input Ret. |
Isolated |
| C |
Output control |
0-5K Pot or 0-3 VDC to 0-5 VDC * |
| D, E |
DC Output |
Two output in Parallel Operation |
| F, G |
DC Return |
Chassis Ground |
| J2 |
Output Voltage Test Point |
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* Control range by a panel mount
Trim Pot.
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