LG LG-D855 - <4-9-1-4-3_Bypass_Booster_Single_Tps61282> Rev_0.3 Diagram

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Only for training and service purposes
LGE Internal Use Only
6. CIRCUIT DIAGRAM
C4950
DNI
C4952
DNI
L4950
DNI
U4950
RT8088A
E3
D2
E1
C2
E2
C3
C1
B3
D1
D3
A1
B2B1
A3
A2
LX1
PGND1
PVIN2 LX2
PVIN1
SDA
AVIN
PGND2
PVIN3
PGND4
SCL
PGND3
AGND
EN
FB
R4900
0
R4906
10K
TOL=0.05
R4905
TOL=0.05
10K
2.2uC4901
C4903
1u
L4900
470n
4.7uC4902
+VPWR
C4900 22u
R4903 100K
VREG_BOOST_BYPASS
TPS61282
U4900
EAN62735901
C4
A4
D3
D1D4
A3
C2
C1
D2
A1 A2
B1
B4
B2
C3 B3
VOUT1
SW1
MODE
VOUT2
VSEL
PGEN
PGND1
nBYP
AGND1
VIN1
PGND3 AGND2
PGND2
VIN2
SW2
C4951
DNI
COMMON_I2C_SCL
COMMON_I2C_SDA
+1V2_VREG_L1
+VPWR
+VPWR
+1V3_VREG_S1A
BOOST_BYP_BYP
BOOST_BYP_VSEL
BOOST_BYP_VSEL
BOOST_BYP_EN
BOOST_BYP_EN
GND directly using dedicated via
2mm
2mm
12/27
10/11
10/11
10/11
10/11
10/11
EN BYP_N VSEL
Vout
0
1
1
1
X X
1
1
0
0
1
X
Boost bypass disabled
For Vin < 3.15V, Vout = 3.15V (Boost mode)
For Vin > = 3.15V, Vout = Vin(bypass mode)
For Vin < 3.35V, Vout = 3.35V (Boost mode)
For Vin > = 3.35V, Vout = Vin (bypass mode)
Vout = Vin (forced bypass mode)
<4-9-1-4-3_Bypass_Booster_Single_TPS61282> Rev_0.3
2mm
3.5mm
C4900 capacitor value 22u or 10u need to check
H Volt LDO Bypass boost
for 3GB LPDDR3Bhelper LDO
10uF DNI
22uF DNI
470nH DNI
DNI
DNI
REV10