REGULATED DC TO DC POWER CONVERTER

MULTIPLE OUTPUT LIGHT DIMMER

The LT-3XX Series is a pulse width-modulated DC to DC converter that provides regulated multiple output power. The converter transforms an unregulated 28 VDC to a regulated and adjustable DC output via a remote control potentiometer or voltage for voltage controlled models. The Model LT-3XX Series is primarily designed to control the light intensity of incandescent bulbs in lighting systems. For special orders any three combinations of LT-52A, LT-53, LT-70, LT-73, LT-100 and LT-103 can be supplied

Features:

  • State of the art design for regulation and positive logic for output overvoltage protection.
  • Other LT-3XX Series available in various output voltage and power ratings in the same package, or special units can be provided for various output combinations.
  • 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 IA.
  • The Model LT-3XX Series is serviceable, small and lightweight (42 watts per pound and 1.7 watts per cubic inch)

 

Specifications:
Input Voltage: 28 VDC nom., 20 to 40 VDC
Output Voltage: Adjustable with external 5K ohm,1/2 W rheostat or voltage 0-5 VDC.
Regulation: 2% for line, 2% load and 2.5% temperature. Common mode isolation = 40 db.
Output Ripple: 25 mVp-p or less.
Protection:
(Overload)
Input and output current pulse when overload exceeds approximately 125% of rating.
Protection:
(Overvoltage)
Output voltage is limited toapproximately 125% of rating eventhough remote control rheostat opens or internal failure occurs.
Temperature: -55C to +71C (sufficient cooling required @ +71'C ambient)
Altitude: 55,000 ft.
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-3XX SERIES LT-352 LT-370 LT-3100
  LT-353 LT-373 LT-3103
Max. Power Rating (watts) 150 200 300
Input Voltage (VDC) 20 to 40 20 to 40 20 to 40
Input Current (ACD) @ FIL
* 20 VDC IN
* 28 VDC IN

11.8
7.2

12.8
9.2

17.8
12.8
Output Voltages DC (three) 0 to 5 0 to 12 0 to 28
Output Current (ADC) Total 30 17 11
Efficiency 75 78 84