ISL78022 Intersil Corporation, ISL78022 Datasheet - Page 18

• Manufacturer Part Number: ISL78022
• Description: (ISL78020 / ISL78022) Automotive Grade TFT-LCD DC/DC
• Manufacturer: Intersil Corporation

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Typical Application Circuit
V
CN
V
(-8V)
NEG
470nF
0.1µF
R22
R21
Q21
82kΩ
10kΩ
0.1µF
700Ω
V
V
V
V
GAMMA SET4
GAMMA SET2
(2.6V TO 5.5V)
GAMMA FB4
GAMMA FB2
CONTROL
V
V
GAMMA4
GAMMA2
10µF
18
V
INPUT
V
C1
100nF
IN
MAIN
2.2nF
470nF
180Ω
10Ω
COMP
DRVN
NEG4
NEG2
OUT4
POS4
OUT2
POS2
A
FBN
REF
CTL
DEL
VDD
IN
OP4
OP2
ISL78020, ISL78022
V
NEG
REG
REF
+
+
CN
-
-
AGND
L1
BOOST
D21
REG
6.8µH
POS
CTL
SW
0.1µF
+
+
+
-
-
-
OP3
OP5
OP1
LX
0.1µF
0.1µF
FB
PGND
GND
DRVP
FBP
SRC
COM
DRN
OUT3
POS3
NEG5
OUT5
POS5
NEG1
OUT1
POS1
D1
D11
D12
10.2kΩ
DRIVER IC
TO GATE
R2
R1
V
V
V
V
V
V
V
V
1kΩ
R
COM
COM SET
GAMMA FB3
GAMMA3
GAMMA SET3
GAMMA FB1
GAMMA1
GAMMA SET1
10
64.9kΩ
700Ω
C2-C3
0.1µF
R12
R11
V
CP
R
C
Q11
7
7
182kΩ
9.76kΩ
R
68kΩ
OPEN
C
0.1µF
OPEN
8
8
10µFx2
A
1kΩ
(9V)
R
VDD
9
0.1µF
470nF
V
CP
(24.5V)
V
A
December 6, 2007
ON
VDD
FN6386.2