LG KP175 - LCD Back-Light Illumination

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3. TECHNICAL BRIEF
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.13 LCD Back-light Illumination
LCD backlight LEDs is controlled by AD6726 via AAT3155, U302.
Figure 3.13 MAIN LCD BACKLIGHT ILLUMINATION
CHARGE PUMP
EN_SET
11
GND
4
5
IN
8
OUTCP
U302
C1+
10
9
C1-
7
C2+
6
C2-
3
D1
D2
2
1
D3
D4
12
AAT3155ITP-T1
C313
1u
1u
C314
C312
1u
VBAT
C316
27p
1.5KR312
27p
C315
FB302
100K
R313
C311 4.7u
27p
C317
MLED2
MLED
LCD_DIM_CTRL
MLED1