Avionics Lighting Power Supply  

  VDC output:

DC Volts Input:

 19-42

 AC Volts Tracking

0-115

current Amps out:

  0 - 6

Single Channel

Power Watts:

  30 - 144

Connector
Programs
TPS-28

Configurations:

18

Price List for TPS-28

• Specifications for system operation
  • Input Voltage: 19 - 42 VDC Standard / 44 Volts Absolute Max. (DO-157)
    Fixed Voltages: Output VDC 5 / 14 / 28 *
    Adjustable Voltages: Output VDC 0-5 / 0-14 / 0-28 *
  • Input tracking Voltages-(Output voltages)
  • 0-5 Vdc for ( 0-5 / 0-14 / 0-28 ) *
  • 0-14Vdc for ( 0-5 / 0-14 / 0-28 ) *
  • 0-28 Vdc for ( 0-5 / 0-14 / 0-28 ) *
  • VAC tracking input  - (Output voltages)
  • 0-115 Vac Input for  DC Output ( 0-5 / 0-14 / 0-28 )
  • Other Features ................................
  • Half bright Day / Night switch ( switchable )
  • Over Voltage FAILSAFE protection ( programmable )
  • Soft-Start Voltage ( adds extra life to your lights )
  • 6.0 Amp. Continuous Output ( max. standard )
  • Universal programmable connector ( 25 pin D )
  • Multi-Dimmer tracking ( from a single source )
  • Input Voltage 19 - 42 Volts DC ( max. standard )
  • Internal Fused at 12.0 AMP's ( max. standard )
  • Tracking with noise immunity to radio signals
  • AC tracking voltage 0 - 115 VAC
  • Tracking frequency Volt AC Input 60-1000 HZ
  • Temperature Range -25 to +70 Degrees C
  • Installation manual for 18 different configurations
  • Short circuit fold-back protection. ( max. time 3 MIN. )
  • Includes D type 25 pin mating connector and cover.
  • Solder cup type matting connectors
  • TPS-28 comes in a solid aluminum casting,
  • Four large mounting holes ( DIA. 0.190 ).
  • Weighs less than 1 LB.
  • Size ( including mounting ears ) High 3.00 x Length 5.25 x Width 2.70 inches.
  • WARRANTY: The TPS-28 comes with a one year limited warrant
    

• Basic Operation:

  • The TPS-28 is a switching power supply. Because it's a switching supply it runs cooler and uses less power than normal lighting supplies. The unit is programmed, by a connector, to your correct voltage and options. The connector supplies both the input and output voltages to run the unit and your lighting. The tracking feature, one of several unique features, allows you to tie the output of an existing lighting system to the units tracking input feature. This allows the TPS-28 to track the other Lighting power supplies. The TPS-28 can be run in a fixed voltage operation, adjustable voltage operation, or tracking voltage operation. The unit has a selectable over-voltage protection option, insuring that your lighting will never be burnt out by over-voltage. Short circuit protection is also provided: if a wire should short for several seconds, the unit goes into a fold-back mode allowing the unit to shut down and then restart. If for some reason the short lasts for several minutes, the unit is designed to blow the fuse thereby abating the chance of a fire. The unit also has a PWM fail circuit: if for some reason the voltage controlling circuit fails the unit is designed to go into a shut off mode. The TPS-28 has a special feedback loop designed to run instrument lighting and does not have instantaneous voltage changes. This helps to eliminate those flickers and flashes when an engine changes it's output RPM.
    

  • Tracking voltage, what it is and how it works.
  • When you need to have the TPS-28 adjust its output voltage to follow another supply voltage, you need to use the tracking input of the TPS-28. The tracking input tells the TPS-28 how much voltage it should be putting out in proportion to the other lighting power supply. This works for both fixed and variable lighting supplies. You will need to select the proper range for the TPS-28 to run your application. We have supplied all the standard configurations of most lighting systems that you will need. The unit also has an AC tracking input of 0-90 Volts that allows 60 - 1000 Hz to be applied to the unit. This allows the DC lighting to be adjusted to an AC lighting circuit.
    
  • Dimmer switch, and what it does. 
  • The half bright dimmer switch is designed to work with any voltage or mode of operation. When the switch is in the on position this will dim the lights that are attached to the TPS-28 to half their brightness.
    
  • Dimmer pot resistor, and what it is used for.
  • When you are not using a fixed voltage output, or a tracking voltage output, you will want to use a variable output for the TPS-28 lighting supply. The output of the supply can be adjusted by a variable 1K pot from 0 volts to the maximum voltage that you have selected for the TPS-28 supply. The 1k variable resistor can be of any power value. The 5 volt reference is used to adjust the TPS-28s supply feed back loop that controls the output voltage.
    
  • Over voltage failsafe operation.
  • There are three over voltage modes that are supplied with the TPS-28. Select the over voltage level that coincides with your voltage. For maximum lighting protection, combine this option with any of the others.
    
  • What the TPS-28 will do for you:
  • The Incandescent lighting controller is designed to provide long life for your lights, with flexibility for almost every lighting situation that you will run into. Almost any D.C. Lighting can be run with the TPS-28. The supply has a soft-start mode that protects the filaments from those quick voltage jumps by allowing a ramped-voltage rise when the unit is turned on, thereby extending the life of the bulbs. In addition, you can add a day/night dimming switch that allows you, in any brightness condition, to instantly dim the light(s) to half their brightness. This feature was added for those cloudy, moonlit nights when the lighting intensity fluctuates. It enhances your visibility to see in the outside world.
• Product Data Sheet:
  • Technical notes for the TPS-28 (all specification are for maximum power)
    1. The unit has a 1.3 volt drop from input to output at or below the voltage of 28 VDC input. This is because
    of its switching blocking design of the supply. However with a 30+ volts input, the output will never
    go above 28 volts if the unit is set to a 28 volt output range. At 0 volts the unit output will be no more than 0.25 VDC.
    2. The unit should always be well grounded to a flat metal surface to help eliminate heat and provide good regulation.
    3. Keep transmitter / receiver wires away from the unit. This will help eliminate any interference the unit may generate.
    4. If the unit is connected to a circuit breaker it should be of the 7 to 10 AMP type designed for use with 28 volts.
    5. The TPS-28 can be used down to 12 volts but will never put out more voltage than it's input has. 
    (reduced current output )*
    6. Non-standard output voltages can be obtained, you must consult the factory for correct wiring.
    7. Tracking error will typically not exceed 6.0% with a stable input source.
    8. Dimmer switch: output voltage will be typically 50% of what the output voltage was when applied.
    9. Dimmer switch line current will not exceed 5 ma.
    10. Dimmer switch line voltage will not exceed 6 volts.
    11. Tracking input line current will not exceed 10 ma.
    12. When using the unit as an adjustable output, you should always use a 1K pot.
    You may use one Pot to adjust more than one TPS-28 at one time.
    13. Pin 20, max.current is 10ma.
    14. Pin's 1- 4, max.current 1.5 Amps each.
    15. Pin's 11,12,24,25, Max. current 1.5 Amps each.
    16. Pin 14 input current Max. less than 1ma.
    17. Never connect the outputs of a TPS-28 to another TPS-28, the units DO NOT current share.
          You may connect the output of one TPS-28 to the tracking input of another TPS-28.
    18. When using more than one TPS-28 with a half bright dimming switch: always use isolation diodes or use a 
           separate switch contact for each circuit to ground.
    19. The PWM's under voltage circuit will not let the unit operate until the input voltage reaches at least 10 VDC.
    20. If the unit goes into over voltage it is designed to blow the fuse in the TPS-28.
    21. Connector style is a 25pin "D" female / solder cup / slide-lock type for the connecting power cable.
    22. There are four mount holes in the TPS-28's two flanges, holes are 0.190 DIA.
    23. Never paint the TPS-28 housing. This will cause the heat transfer to be lessened.
    24. The TPS-28 can be used to run LED's, Wheat grain bulbs, Quartz lighting, Tungsten filament lighting.
    25. Maximum output current is 6.0 AMPs continuous at any output voltage selected. Surge currents 8 AMPs
    26. The input voltage to the TPS-28 has surge protection that goes into operation above 45.0 volts.

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