AME9001AETH AME, AME9001AETH Datasheet - Page 14

• Manufacturer Part Number: AME9001AETH
• Description: CCFL Inverters & Accessories Backlight Controller
• Manufacturer: AME

Specifications of AME9001AETH

• Function: Backlight Controller
• Input Voltage: 24 V
• Output Voltage: 5.35 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AME9001
14
Control Logic
Comparator
Always Hi
To PWM
To Fault
CHOP
AME, Inc.
Brightness
Outside Chip
voltage
control
-
+
-
Inside Chip
-
C4
BRIGHT
2.5V
250mV
CSDET
COMP
CT
FB
Figure 11. Alternative Brightness Control
Outside Chip
Inside Chip
BRIGHT
Figure 10. Duty Cycle Dimming
CT1
5V
RF
T1
R
2R
500mV
R
R
2
1
+
-
3V
+
-
+
-
Maximum current=
Minimum current=
This method disables
duty cycle dimming
CHOP causes the CCFL
to turn on and off
periodically.
CCFL Backlight Controller
S
R
CHOP
(R
R
1
1
+R
Q
//(2R+R)
K
K
2
)//(2R+R)