Filament Preheat PTC Thermistor
1. Applications
It can be applied in the electronic ballast of kinds of fluorescent
lamps and electronic energy-saving lamps.No necessity to modify
the circuitry.If proper thermistor is parallel connected on the two
ends of resonant capacitor of lamps, cold startup of electronic
ballast and electronic energy-saving lamps will turn into the
Preheatstartup which can make the Preheatingtime reach 0.4-2S
and extend the life of service to three times of the primary.
2. Characteristics
Execution utilizing the characteristic of PTC material, Small
size of product, High voltage resistance, Longevity of service,
Low power when normally working.
3. Application principal
Preheatstartup principium of PTC thermistor is showed in
following chart: At initial moment of turning on the switch, R is
on normal temperature state, its resistance is far below that of
C , and the current passes through C and R and comes into being loop warming up the Filamnet, About 0.4-2s later, the temperature of R exceeds courier temperature T and jumps into the state of high resistance far over that of C , and the current passes through C , C , comes into being loop and results in LC resonance which generates high voltage to light the lamps.
4.Dimension (Unit: mm) |