FAN7319 Datasheet, PDF (20/23 Pages) Fairchild Semiconductor – LCD Backlight Inverter Drive IC

Typical Full-Bridge Application Circuit (LCD Backlight Inverter)
Application
LCD TV (LIPS Type)
Input Voltage Range
13±10%
Number of Lamps
CCFL/EEFL IP
OUTD
OUTC
OUTB
OUTA
P FC _ OU T(3 8 0 Vd c)
F1
OLR
L1 = 700uH / L2 = 400uH
K=0.98
C51
100uF
450V
FUSE
C52
100uF
450V
CN3
C N _ C C FL
C11 22p
R16
30k ⁰ CN4
C N _ C C FL
R15
10k
Puls e
Trans form er
T1
R109
22R
R108
22R
Puls e
Trans form er
T2
R107
22R
FD PF7 N 5 0 F
D8
R101
R102
M1
C3
27pF/6KV
BAV70
SOT-23
C6
27pF/6KV
SOT-23
BAV70
R104
1k
68R
R105 C102
12k 1n
1.8R
Q101
Q2N2222A
SOT-23
R103
12k
C101 ZD101
OPEN open
SOD-123
TO-220F
C5 600V
C7
R12
15n\ 10k
R14 C8
10k 15n
T3
D101
R201
R202
SOT-23
BAV70
R204
1k
68R
R205 C202
12k 1n
1.8R
Q201
Q2N2222A
SOT-23
R203
12k
C201 ZD201
OPEN open
SOD-123
D201
680nF
M2
TO-220F
FD PF7 N 5 0 F
R20 R21
33 OPEN
1W 1W
0
0
R33
open
D10 BAV70
SOT-23
R19
15k
R34
30k
0
SENSE
OLP
R22
R301
R302
R27 R28
30k
M3
33 OPEN
SOT-23 R304
68R
1.8R _R303
TO-220F
1W 1W
BAV70
Q301
1k
Q2N2222A
C301 ZD301
R305 C302 SOT-23
12k OPEN open
FD PF7 N 5 0 F
0
12k 1n
SOD-123
R106
22R
D301
R401
R402
SOT-23
BAV70
R404
1k
68R
R405 C402
12k 1n
1.8R
Q401
Q2N2222A
SOT-23
R403
12k
C401 ZD401
OPEN open
SOD-123
M4
FD PF7 N 5 0 F
TO-220F
D401
R56
ENA
22R _C27
100n
CN2
1
2
3
4
5
1 2 5 0 5 WR -5
VIN
VIN(10~24V)
0
R58 C28
33k 1n
0
IC 2
R57
100k
2.2u
0
R39
C24
1k
BDIM(External only)
ADIM ( Pos it ive )
R40
open
R38
10k
10k R53
C16
R44
1n
10k
4.7n
C25
100n
C15
1u
C29
0
VOLP
REF
BDIM
ADIM
CMP
TIMER
RT
R30
82k
R31
51k SENSE
RT1
SENSE
GND
R35
15k
0
FAN 7 3 1 9
20-SOIC
ENA
OVPR
MODE
OLP
OLR
VIN
OUTA
OUTB
OUTC
OUTD
REF
R54
68k
R55 C26
47k 1n
R59
OPEN
OLP
OLR
OU TA
OU TB
OU TC
OU TD
R60
0R
0
C23
2.2u
0
R52
VI N
C1
47uF
25V
4.7R
REF
Figure 47. Typical Full-Bridge Application Circuit
© 2010 Fairchild Semiconductor Corporation
FAN7319 • 1.0.1
20
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