Phoenix Industrial Co. Ltd. PPS25-1 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. .