MAX8759 Maxim Integrated Products, MAX8759 Datasheet - Page 29

• Manufacturer Part Number: MAX8759
• Description: CCFL Backlight Controller
• Manufacturer: Maxim Integrated Products

Figure 11. Typical MAX8758 Dual-Lamp Operating Circuit
INPUT VOLTAGE
SMB_DATA
SMB_CLOCK
PWM INPUT
ALS SUPPLY
ALS OUTPUT
7.5V TO 21V
Low-Cost, SMBus, CCFL Backlight Controller
V
CC
F1
2A
0.47µF
0.1µF
169kΩ
0.1µF
1µF
C15
C7
C12
C9
1%
R3
______________________________________________________________________________________
27
11
28
1
2
3
7
8
9
5
6
BATT
GND
DEL
V
SDA
SCL
PWMI
PWMO
FREQ
VALS
ALS
CC
MAX8759
PGND1
PGND2
COMP
BST2
BST1
ISEC
TFLT
IFB1
IFB2
GH1
GH2
V
GL1
GL2
VFB
LX1
LX2
DD
21
24
18
17
16
26
20
19
23
22
25
12
13
15
14
10
4
C11
0.1µF
FDS6990A
C14
0.22µF
C10
0.1µF
20kΩ
C8
1µF
FDS6990A
R10
V
C13
6.8nF
CC
N1A
N2A
N1B
N2B
180kΩ
R9
180kΩ
C1
22µF
25V
20kΩ
R12
R13
2.2µF
C2
2.2µF
C3
390kΩ
390kΩ
1%
R7
D3
1%
1:110
R8
T2
1:110
T1
D4
C6
1nF
C17
1nF
C5
10pF
3kV
C4
10pF
3kV
R14
100kΩ
R15
100kΩ
1
2
R1
150Ω
1%
HV
LV
1
2
R2
150kΩ
1%
HV
LV
29