參數(shù)資料
型號(hào): AME9001
廠商: AME, Inc.
英文描述: CCFL BACKLIGHT CONTROLLER
中文描述: CCFL背光控制器
文件頁數(shù): 14/27頁
文件大?。?/td> 370K
代理商: AME9001
AME, Inc.
14
CCFL Backlight Controller
AME9001
Figure 11. Alternative Brightness Control
Figure 10. Duty Cycle Dimming
BRIGHT
CT1
+
-
3V
+
-
500mV
S
R
Q
+
-
CHOP
CHOP causes the CCFL
to turn on and off
periodically.
C4
Brightness
control
voltage
Inside Chip
Outside Chip
5V
R
1
R
2
R
2R
BRIGHT
CT
COMP
FB
CSDET
RF
+
-
250mV
Inside Chip
Outside Chip
This method disables
duty cycle dimming
Maximum current=
K
R
1
//(2R+R)
Minimum current=
K
(R
1
+R
2
)//(2R+R)
2.5V
T1
+
-
CHOP
+
-
Always Hi
To PWM
Comparator
To Fault
Control Logic
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