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AME9002

Asahi Kasei Microsystems
Part Number AME9002
Manufacturer Asahi Kasei Microsystems
Description CCFL Backlight Controller
Published Mar 25, 2010
Detailed Description AME, Inc. AME9002 www.DataSheet4U.com y nar i m i l Pre CCFL Backlight Controller n General Description The AME9002 ...
Datasheet PDF File AME9002 PDF File

AME9002
AME9002

Overview
AME, Inc.
AME9002 www.
DataSheet4U.
com y nar i m i l Pre CCFL Backlight Controller n General Description The AME9002 is AME’s next generation direct drive CCFL controller.
Like its cousin, the AME9001, the AME9002 controller provides a cost efficient means to drive single or multiple cold cathode fluorescent lamps (CCFL), driving 3 external MOSFETs that, in turn, drive a wirewound transformer that is coupled to the CCFL.
However the AME9002 includes extra circuitry that allows for a special one second start up period wherein the voltage across the CCFL is held at a higher than normal voltage to allow older tubes (or cold tubes) a period in which they can “warm up”.
During this one second startup period the driving frequency is adjusted off of resonance so that the tube voltage can be controlled.
As soon as the CCFL “strikes” the special start up period ends and the circuit operates in its normal mode.
The AME9002 includes features such as soft start, duty cycle dimming control, dimming control polarity selection, undervoltage lockout and fault detection.
It is designed to work with input voltages from 7V up to 24V.
When disabled the circuit goes into a zero current mode.
n Pin Configuration 24 23 22 21 20 19 18 17 16 15 14 13 AME9002 1 2 3 4 5 6 7 8 9 10 11 12 AME9002 1.
VREF 2.
CE 3.
SSC 4.
RDELTA 5.
FAULTB 6.
RT2 7.
VSS 8.
OVPH 9.
OVPL 10.
FCOMP 11.
CSDET 12.
BATTFB 13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
OUTC OUTAPB OUTA VBATT BRPOL VDD CT1 FB COMP BRIGHT SSV PNP n System Block Diagram n Features l Small package: 24 pins for QSOP/ SOIC/ PDIP packages l Drives multiple tubes l Special 1 second start up mode l Automatically checks for common fault conditions l 7.
0V < Vbatt < 24V l Low component count l Low Idd < 3.
5mA l <1uA shutdown mode l Battery UV lockout l Brightness polarity select Controller External Components CCFL Array AME 9002 LIGHT + Resistors + Capacitors N n Applications l Notebook computers l LCD/TFT displays 1 AME, Inc.
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