Rainbow Electronics MAX754 - Manual (Page 5)

MAX753/MAX754
CCFL Backlight and
LCD Contrast Controllers
_______________________________________________________________________________________ 5
MAX754CSE
MAX758ACWE
3,4 5
Q5
Q2
Q3
C4
C6
C8
C5
C7
Q4
C9
POSITIVE
CONTRAST
VOLTAGE
R10
2 6 1
8 12 T1
Q1
14
R1
C3 C2
R16
LX
13
LDRV
12
PGND
16
LFB
6
GND
9
CC
2
LADJ
3
LON
5
D1B
CADJ
D1A
D2B D2A
4
CON
10, 11
SS
GND
12, 13, 14
LX
7
L1
CS
10
V DD
C1
1
CDRV
11
REF
7
CFB
8
SHDN
2
V+
1, 15, 16
REF
D5
3
CC
8
15
+5V, ±5%
UNREGULATED INPUT VOLTAGE
BATT
R2
R17
L2
D4
D3
D7B
D6B
D6A D7A
+5V CMOS
LOGIC
CONTROL
SIGNALS
C10
R8
R4
R5
R6
R7
R18
R3
CCFL
Figure 1. CCFL and Positive LCD Power Supply