MAX8759 Maxim Integrated Products, MAX8759 Datasheet - Page 9

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

(Circuit of Figure 1, V
Low-Cost, SMBus, CCFL Backlight Controller
vs. SMBus BRIGHTNESS AND PWMI DUTY CYCLE
_______________________________________________________________________________________
IN
100
5.35
5.34
5.33
5.32
5.31
5.30
80
60
40
20
0
= 12V, V
0
0
A: ALS, 1V/div
NORMALIZED BRIGHTNESS
ALS TRANSIENT RESPONSE
0.2
2
(ALSDEL1 = ALSDEL0 = 0)
CC
V
CC
SMB = 0xFF
LOAD CURRENT (mA)
PWMI DUTY RATIO
= V
LOAD REGULATION
4
0.4
V
DD
IN
1s/div
V
= 12V
IN
, T
6
= 24V
0.6
A
B: COMP, 1V/div
= +25°C, unless otherwise noted.)
SMB = 0x80
8
Typical Operating Characteristics (continued)
0.8
MAX8759 toc21
10
1.0
12
A
B
5.35
5.34
5.33
5.32
5.31
5.30
5.32
5.31
5.30
5.29
5.28
5.27
1.0
0.8
0.6
0.4
0.2
0
vs. ALS VOLTAGE AND PWMI DUTY CYCLE
-40
0
8
-20
NORMALIZED BRIGHTNESS
0.2
V
12
CC
vs. TEMPERATURE
V
INPUT VOLTAGE (V)
ALS
PWMI DUTY RATIO
TEMPERATURE (°C)
V
0
LINE REGULATION
CC
0.4
= 1.8V
VOLTAGE
20
16
0.6
40
V
ALS
20
0.8
= 0.8V
60
1.0
24
80
9