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3. TECHNICAL BRIEF
3.14 LCD Back-light Illumination
LCD backlight LEDs is controlled by DBB via AAT2807, U402.
WHITE/FLASH LED LDO
VBAT
C419
1u
R405
C_FLASH
1.5K
LCD_DIM_CTL
Figure 3-31. MAIN LCD BACKLIGHT ILLUMINATION
4
VIN
VOUT_FL
VOUT_BL
U404
AAT2807AIXN-4.5
9
GND
17
PGND
16
EN_FLSH
ISINK1
ISINK2
10
$V
EN_SET
ISINK3
R406
7.5K
3
FB400
13
FB403
8
NC
5
MLED1
6
MLED2
7
MLED3
- 48 -
R404
22
FLASH_LED
MLED
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