AME9003AETH AME, AME9003AETH Datasheet - Page 21

• Manufacturer Part Number: AME9003AETH
• Description: CCFL Inverters & Accessories Backlight Controller
• Manufacturer: AME

Specifications of AME9003AETH

• Function: Backlight Controller
• Input Voltage: 3.5 V
• Output Voltage: 5.35 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AME9003
Brightness
Outside Chip
control
voltage
Control Logic
Always Hi
Comparator
CHOP
To PWM
AME, Inc.
To Fault
C4
Inside Chip
BRIGHT
BRPOL
CT1
EA1
-
+
-
Inside Chip
-
Figure 13. Alternative Brightness Control
BRIGHT
2.5V
BRPOL
CSDET
1.25V
COMP
Figure 12. Duty Cycle Dimming
CT
FB
50mV
Outside Chip
+
-
5V
3V
optional
network
R-C-D
RF
+
-
+
-
T1
R
2R
CHOP causes the CCFL to turn on and off
periodically by charging and discharging
SSV. SSV, in turn, pulls the COMP pin low,
periodically turning off the CCFL.
R
R
2
1
S
R
CHOP
Q
Maximum current=
Minimum current=
This method disables
duty cycle dimming
CCFL Backlight Controller
(R
R
1
1
+R
//(2R+R)
K
K
2
)//(2R+R)
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