FAN7310_07 Datasheet, PDF (2/3 Pages) Fairchild Semiconductor – LCD Backlight Inverter Drive Integrated Circuit

Typical Application
VCC
C25
100µF
ENA
0
R24
10kΩ
C28
10nF
0
REF
R2
R4 56kΩ
22kΩ
DIM(0~3.3V) _C21
10nF
R3
20kΩ
00
IC1
FAN7310
OLP
RT1
OLR OUTB
ENA OUTA
R6
100kΩ
0
OUTB
OUTA
0
C1
0 ^1µF
0 ^REF
C2
1µF(X7R)
S_S
VIN
GND PGND
REF OUTC
ADIM OUTD
0
C6
1µF ₀
OUTC
OUTD
BDIM CT _C5
0
220pF
EA_IN RT _R5
0
27kΩ
EA_OUT BCT
C3
4.7nF
C4
4.7nF
0
R8
100kΩ
R25
10kΩ
C27
1µF
C22
R26
1µF
0
10kΩ ₀
M1
FDS8958A
M2
FDS8958A
0
0
FB
R15
R9
8.2kΩ
2kΩ
TX1
C7
10µF
0
C10
15pF
CCFL
OLP1
OLR
D4
BAV99
FB
C14
20nF
00
D6
BAV99
R16
1.5kΩ
00
OLP R1
330kΩ
OLP1
R22
10kΩ
0
R14 C16
100kΩ 2.2nF
00
OLR
C9
1µF
0
Q1
D11
KST2222 D1N4148
C19
2.2nF
D1
D1N4148
0
FAN7310 Rev. 05
Figure 1. Application Circuit for CCFL
Internal Block Diagram
RT
OSCILLATOR
max. 2V
min. 0.5V
CT
SYNC
-
S_S
+
+
Output
Control
Logic
Output
Driver
Output
Driver
OUTA
OUTB
PGND
OUTC
OUTD
EA_OUT
6μA
S_S
ADIM
EA_IN
max. 2V
BCT
BDIM
AGND
min. 0.5V
Error Amp.
+
+
-
UVLO
Q ^SET S
Q CLR R
1.4μA
+
-
2V
UVLO
Solr 105μA
Sburst 85μA
-
Sburst
+
Voltage
Reference
&
Internal
Bias
UVLO
Solr
2.5VREF
VIN
+
-
+
- 2V
+
-
UVLO 5V
OLP
2.7V
OLR
REF
1.4V
ENA
VIN
Figure 2. Functional Block Diagram
FAN7310 Rev.03
© 2005 Fairchild Semiconductor Corporation
FAN7310 Rev. 1.0.3
2
www.fairchildsemi.com