FAN7319 Datasheet, PDF (21/23 Pages) Fairchild Semiconductor – LCD Backlight Inverter Drive IC

Typical Half-Bridge Application Circuit (LCD Backlight Inverter)
Application
LCD TV (LIPS Type)
Input Voltage Range
13±10%
Number of Lamps
CCFL/EEFL IP
PFC_OUT(380Vdc)
C51
82uF
450V
F1
C52
82uF
450V
FUSE
OUTB
OUTA
R306
22R
R307
22R
Puls e
Trans form er
T2
R301
R302
SOT-23
BAV70
R304
1k
68R
R305 C302
12k 1n
1.8R
Q301
Q2 N 22 2 2 A
SOT-23
R303
12k
C301 ZD301
OPEN 15V
SOD-123
D301
R401
R402
SOT-23
BAV70
R404
1k
68R
R405 C402
12k 1n
1.8R
Q401
Q2 N 22 2 2 A
SOT-23
R403
12k
C401 ZD401
OPEN 15V
SOD-123
D401
R56
ENA
22R _C27
100n
OLR
CN3
C N _ C C FL
C3
25pF/6KV
C11 22p
0
R16 30k CN4
C N _ C C FL
R15
10k
D8
BAV70
SOT-23
C6
25pF/6KV
C5 600V
T3
680nF
C7
R12
15n\ 10k
R14 C8
10k 15n
FD PF7 N 5 0F
M3
TO-220F
R20 R21
33 OPEN
1W 1W
0
R27 R28
33 OPEN
1W 1W
0
R33
open
D10 BAV70
SOT-23
R19
15k
R34
30k
0
R22
30k
SENSE
OLP
0
M4
FD PF7 N 5 0 F
TO-220F
CN2
1
2
3
4
5
12505WR-5
VI N
V IN(10~24V )
0
BDIM(External only)
ADIM (Positive)
R58 C28
33k 1n
0
IC2
R57
100k
2.2u
0
C24
R38
10k
R53
10k
C16
1n
R44
10k
10n
C25
100n
C15
1u
C29
0
VOLP
REF
BDIM
ADIM
CMP
TIMER
RT
R31
33k SENSE
R30
open
RT1
SENSE
GND
R35
15k
0
FAN7319
20-SOIC
ENA
OVPR
MODE
OLP
OLR
VIN
OUTA
OUTB
OUTC
OUTD
REF
R54
68k
R55 C26
R59
47k 1n
0R
OLP
OLR
OUTA
OUTB
R60
OPEN
0
C23
2.2u
0
R52
VI N
C1
47uF
25V
4.7R
REF
Figure 48. Typical Half-Bridge Application Circuit
© 2010 Fairchild Semiconductor Corporation
FAN7319 • 1.0.1
21
www.fairchildsemi.com