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LGE Internal Use Only
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
ͽͶ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑ΟΝΪ
3.14 KEY BACLKLIGHT LED Interface
Key Backlight LED is controlled by switch (Q200). If KEY_BL_EN is high, Current is flowing from VBAT to LED.
Then Light emitted from The LED.
KEY_BL_EN is operating PWM. It is reducing current consumption.
Figure 3-14-1 Key Backlight Block
3. TECHNICAL BRIEF
61/136
VA205
VA226
LD201
Q201
1
2
3
LD202
VA204
1.2K
R222
R268
10K
74
14
2
R
0.1u
C249
VBAT
13
2
R
74
KEY_BL_EN
KEY BACKLIGHT
Содержание LG-A130
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