Phoenix Industrial Co. Ltd. PPS20-1 User Manual

DESCRIPTION OF CIRCUIT FUNCTION 

   

 

 

NAME OF APPLICANT : Phoenix Industrial Co., Ltd. 

NAME OF PRODUCT   : SELF -BALLASTED LAMP 

MODEL NO: PPS13/1 

            PPS20/1 

            PPS25/1 

 

 

 

1.  AC POWER SUPPLIED THOUGH BASE OF DEVICE IS RECTIFIED 

AND BOOSTED TO DC BY PASSING BOTH OF THE RECTIFYING 

CIRCUIT AND THE ELEVTROLYTIC CONDENSER 

AT THIS TIME ,ALL OF THE HARMFUL NOISE INCLUDING HIGH 

PREQUENCY NOISE OCCURRED IN SWITICHING CIRCUIT IS 

ELEMINATED WHEN THIS RECTIFIED DC IS PASSED THROUGH 

LINE FILTER 

 

2.  THE TRANSISTOR HALF BRIDGE INVERTER GENERATES THE 

40KHz-50KHz HIGH FREQUENCY VOLTAGE POWER BY 

SWITICHING OPERATION OF THE TRANSISTORS WITH THE 

RECTIFIED DC POWER IN RECTIFYING CIRCUIT,AND THIS 

GENERATED HIGH PREQUENCY VOLATAGE POWER LIGHTS 

THE FLUORESCENT LAMP.  

 

        3.AT THIS TIME, LAMP IS LIGHTED AS TWO STEPS WHICH IS 

MAIN POWER IS PASSED TO FILAMENT AFTER PREHEATING 

OF PTC IN PRDER TO EXTEND LAMP LIFE BY AVOIDING THE 

RAPLDLY SCTTERING OF EMISSION MATERIAL ON FILAMENT 

 

4.WHEN SWITCHING OPERATION OF ELECTRONIC BALLAST IS 

MADE UP,ACTION OF THE DIAC STOPS AS DISCHARGING THE 

CONDENSATED POWER IN CONDENSOR BY BOTH OF THE 

DIODE AND THE TRANSISTOR. .