Max8759 low-cost, smbus, ccfl backlight controller, Typical operating characteristics (continued) – Rainbow Electronics MAX8759 User Manual
Page 9
MAX8759
Low-Cost, SMBus, CCFL Backlight Controller
_______________________________________________________________________________________
9
0
20
60
40
80
100
0
0.4
0.2
0.6
0.8
1.0
NORMALIZED BRIGHTNESS
vs. SMBus BRIGHTNESS AND PWMI DUTY CYCLE
MAX8759 toc19
PWMI DUTY RATIO
NORMALIZED BRIGHTNESS (%)
SMB = 0xFF
SMB = 0x80
0
0.2
0.6
0.4
0.8
1.0
0
0.4
0.2
0.6
0.8
1.0
NORMALIZED BRIGHTNESS
vs. ALS VOLTAGE AND PWMI DUTY CYCLE
MAX8759 toc20
PWMI DUTY RATIO
V
ALS
= 1.8V
V
ALS
= 1.8V
V
ALS
= 0.8V
B
A
ALS TRANSIENT RESPONSE
(ALSDEL1 = ALSDEL0 = 0)
MAX8759 toc21
A: ALS, 1V/div B: COMP, 1V/div
1s/div
5.30
5.31
5.33
5.32
5.34
5.35
V
CC
LINE REGULATION
MAX8759 toc22
INPUT VOLTAGE (V)
V
CC
VOLTAGE (V)
8
16
12
20
24
5.30
5.31
5.33
5.32
5.34
5.35
0
4
2
6
8
10
12
V
CC
LOAD REGULATION
MAX8759 toc23
LOAD CURRENT (mA)
V
CC
VOLTAGE (V)
V
IN
= 24V
V
IN
= 12V
5.27
5.28
5.30
5.29
5.31
5.32
-40
0
-20
20
40
60
80
V
CC
VOLTAGE
vs. TEMPERATURE
MAX8759 toc24
TEMPERATURE (
°C)
V
CC
VOLTAGE (V)
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
IN
= 12V, V
CC
= V
DD
, T
A
= +25
°C, unless otherwise noted.)