KA7522

KA7522/D DIMMING BALLAST CONTROL IC BALLAST CONTROL IC The KA7522 is a electronic ballast controller for fluorescent inverter systems. It contains whole function in KA7521, current feed back and preheating time controlled by temperature sensing. FEATURES 3-step soft start Input voltage limit & Brown out Non Lamp detect, & Lamp reset ZVS Guard control Current feedback control Preheating time controlled by temperature sensing 22 DIP 20 SOP BLOCK DIAGRAM Tsns 17 Rhys 18 ORDERING INFORMATION Device KA7522 KA7522D Package 22 SDIP 20 SOP Operating Temperature Î-25 ~ + 100 Î-25 ~ + 100 Vds Vgs 16 15 VCC 20 BROW N OUT OVER TEMPERATUR E IN P U T V LIM IT ZVS GUARD CONTRO L 10 3 STEP 8 LOW - SOFT TEMPER START 7 SAW TOO TH GENERATOR + - U V L O & 5 V V re f 1 4 V re f 2 D -F/F 2 OUTPUT STAGE 2 OUT2 19 OUT1 D C -F E ED 12 FORW AR D DELAY TIMER D IM M IN G BOX CURREN T FEEDBACK M U LT IP LIE R LAMP DETECT NON LAMP OVERCURREN T 4 Vsns LAMP RESET 9 ñ 5 V lm 1 6 V lm 2 11 Vmo 13 V fb ©1999 Fairchild Semiconductor Corporation Rev. B KA7522/D DIMMING BALLAST CONTROL IC ÎABSOLUTE MAXIMUM RATINGS (TA = 25 , unless otherwise specified) Characteristic Supply Voltage Peak driver output current Operating ambient temperatute Storage temperature Symbol VCC IO(P) T(OPR) TSTG Value 20 500 -25 ~ +100 -65 ~ +150 Unit V mÎÎA ELECTRICAL CHARACTERISTICS Î(VCC = 12V, TA = 25 , unless otherwise specified) Characteristics Under Voltage Lock Out...