KA7541 Datasheet, PDF (9/14 Pages) Fairchild Semiconductor – Simple Ballast Controller

Application Circuit
<85 ~ 265VAC Input, 400VDC, 32W×2 Lamps Ballast>
KA7541
Full-wave Rectified Output
L2
D3 D4
D1 D2
NTC
C3 C4
C2
L1
C1
TNR
F1
C5
R3 _R6
D6
R1
R4
R5
C6
FAN7527
C8
R2
C7
D5
Q1
R7
PFC Output
R8
C9
R9
AC INPUT
To PFC Output
To full-wave
rectified voltage _R12
R15
Q2
C17
C19
T1
R14
C15
R10
L3
Q3
R11
L4
C14
C21
C18
C20
D7 ^C16
R16
D8
C10 Z1
KA7541
C11 C12
R17 _R18
R13
C13
R19
9