16 15 14 13 12 11 10 9
8
7 6 5 4 3 2 1
L
K
J
I
H
G
F
E
D
C
B
A
L
K
J
I
H
G
F
E
D
C
B
A
16 15 14 13 12 11 10 9
8
7 6 5 4 3 2 1
DRAWN BY
SIZE
DWG NO
REV
TITLE
SHEET
of
A2
LG Electronics
Date
LGE Internal Use Only
PDM NUMBER
7-1-8-4-2_QLCD_TOUCH26
Schematic1
User Name
Rev
Drawing Date
LCD_VCL_EN connected MSM8996
LCD_VDD_IO_EN
C7510 100p
+1V8_LCD_VDD_IO
1u
C7508
+3V3_LCD_VPNL
C7506
1u
R7506
100K
+5V5_DDVDH
-5V5_DDVDL
100p
D7216
100pD7210
<7-1-8-4-2_Quad_INCELL_LCD_5.5">
0.4mm
TOUCH_SPI_CSN
TOUCH_SPI_SCLK
TOUCH_INT_N
DSV_ENM
LCD_VSYNC
LCD_PWM
LCD_RESET_N
TOUCH_RESET_N
LCD_LED_C3
LCD_MIPI0_DATA0_N
LCD_MIPI0_DATA0_P
LCD_MIPI0_DATA3_N
LCD_MIPI0_DATA3_P
LCD_MIPI0_DATA2_N
LCD_MIPI0_DATA2_P
LCD_MIPI0_DATA1_N
LCD_MIPI0_DATA1_P
LCD_MIPI0_CLK_N
LCD_MIPI0_CLK_P
TOUCH_SPI_MOSI
AOD_RTC
LCD_LED_A
LCD_LED_C1
LCD_LED_C2
1n C7001
C70001n
R7800
100K
2.2u
C4460
+VREG_BOOST_BYPASS
C7800
100p 100p
C7801 C7802
100p
C7803
1u
<4-4-4_LCD_BL_Booster_DW8831> Rev_1.0
Vout_max = 22.7V at Vf=3.2V, 2P7S, Headroom V=0.3V
LED Vf=3.2V, If=23mA/46mA(2string), 2P7S
20% inductor tolerance => fsw=500khz : Ipeak = 722.6mA, fsw=1MHz : Ipeak = 541.9mA
20% inductor tolerance => fsw=500khz : Ipeak = 651.9mA, fsw=1MHz : Ipeak = 473.3mA
LED Vf=3.0V, If=20mA/46mA(2string), 2P7S
If you have other LED spec&quantity, recaculate Ipeak And select Power inductor
30% inductor tolerance => fsw=500khz : Ipeak = 774.2mA, fsw=1MHz : Ipeak = 567.7mA
30% inductor tolerance => fsw=500khz : Ipeak = 702.9mA, fsw=1MHz : Ipeak = 498.9mA
You select diode spec : VR > Vout_max, If > LED If(all string current), I_FRM > Inductor Ipeak
PPLUS_UPPER
2nd_LCD_LED_C1
2nd_LCD_LED_C2
LCD_PWM
LCD_AOD_BL_EN
COMMON_I2C_SCL
COMMON_I2C_SDA
+VPWR
2nd_LCD_LED_C2
2nd_LCD_LED_C1
TOUCH_SPI_MISO
16.01.06
C7509 1u
50V
C7100
C7101
D7213
D7212
D7211
D7205
D7204
D7215
D7214
D7505
D7208
G1G2
G3G4
17
39 16
40 15
41 14
42 13
43 12
44 11
45 10
46 9
47 8
48 7
49 6
50 5
51 4
52 3
53 2
54 1
CN2
28 27
29 26
30 25
31 24
32 23
33 22
34 21
35 20
36 19
37 18
38
LCD_MAKER_ID
P2P4
P1P3
P6
P5
24
13
6
5
FL7102
EAM62451101
D7217
U7002
34
6 1
25
7
GND2
N/C FB
OUTIN
EN GND1
NCP176AMX180TCG
U7003
3
4
5
2
1
OUT
GND
EPAD
IN
EN
SCY99189AMU330TCG
+1V8_LCD_VDD_IO
+2V15_VREG_S5A
C7004
1u
1u
C7005
+VREG_BOOST_BYPASS
LCD_VCL_EN
+3V3_LCD_VPNL
C7006
1u
1u
C7007
R7507
DNI
+1V8_VREG_S4A
16.03.23
Open --> GND
(noise reduce)
FEED
ANT7800 SD-C07140-01
FEED
ANT7801 SD-C07140-01
FEED
ANT7802 SD-C07140-01
1
5
2
6
3
7
4
8
9 10
1
5
2
6
3
7
4
8
910
U4451
D3
B3
D2
B1
C2
A3
C3
D1
B2
A1
C1
A2
SDA
HVLED2
PWM
SCL
NC
PGND
HWEN
AGND
HVLED1
OVP
PVIN
SW
DW8831
VI
C7511 100p
100pC7512
C7010 100p
100pC7011
FL7100
EAM64030801
EAM64030801
FL7103
C7805
DNI DNI
C7806
160608 Changed cap to DNI
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