MAX8722 Maxim Integrated Products, MAX8722 Datasheet - Page 8

• Manufacturer Part Number: MAX8722
• Description: Low-Cost CCFL Backlight Controller
• Manufacturer: Maxim Integrated Products

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Low-Cost CCFL Backlight Controller
8
(Circuit of Figure 1. V
400
350
300
250
200
150
100
_______________________________________________________________________________________
100
DIGITAL PWM FREQUENCY vs. R
150
-0.1
-0.2
-0.3
-0.4
-0.5
100
80
60
40
20
200
0
0
R
BATT
FREQ
0
0
0.2
(Ω)
250
= 12V, V
NORMALIZED BRIGHTNESS
0.4 0.6
2
V
CC
vs. CNTL VOLTAGE
LOAD CURRENT (mA)
CNTL VOLTAGE (V)
LOAD REGULATION
300
0.8 1.0
4
CC
FREQ
= V
350
1.2 1.4 1.6 1.8 2.0
6
DD,
V
SHDN
8
215
212
209
206
203
200
Typical Operating Characteristics (continued)
7
= 5.3V, T
10
10
DIGITAL PWM FREQUENCY
vs. INPUT VOLTAGE
A
INPUT VOLTAGE (V)
13
= +25°C, unless otherwise noted.)
16
19
-0.01
-0.02
-0.2
-0.4
-0.6
-0.8
-1.0
0.04
0.03
0.02
0.01
0.4
0.2
0
22
0
-40
4
V
CC
25
-20
ACCURACY vs. TEMPERATURE
8
V
CC
0
INPUT VOLTAGE (V)
TEMPERATURE (°C)
LINE REGULATION
6.10
6.05
6.00
5.95
5.90
5.85
5.80
12
20
8
40
16
NOMINAL CURRENT SET POINT
60
RMS LAMP CURRENT
12
vs. INPUT VOLTAGE
20
INPUT VOLTAGE (V)
80
16
24
100
20
24