Audio Amplifier & Microphone - LG GM360i Service Manual

3. TECHNICAL BRIEF
3.12 Audio amplifier & Microphone
3.12.1 Audio amplifier
Audio amplifier sub system IC, WM9093 is an audio power amplifier capable of delivering 650mW of continuous
average power into a mono 8Ω load, 34mW per channel of continuous average power into stereo 16Ω
single-ended (SE) loads. The flexible input configuration allow single ended or differential stereo inputs. Mixers
allow flexible routing to the outputs. A voice bypass is also available for voice applications. Separate mixer and
volume controls are provided for each speaker and headphone driver.
C815 1u
EAR_SPK_N
1u
C814
EAR_SPK_P
1u
C813
FM_RADIO_L
1u
C812
FM_RADIO_R
1u
C811
RCV_N
1u
C810
RCV_P
I2C2_SCL
I2C2_SDA
LG Electronics
LGE Internal Use Only
VBAT
C820 C819
2.2u 0.1u
C5
OUT+
D5
OUT-
C2
IN1-
C1
IN1+
A2
U802
HPL
D2 A1
IN2- HPR
D1
IN2+
D3
IN3-
C3 B5 C803 2.2u
IN3+ CPVDD
A3 C804 2.2u
CPVSS
A4
CP
A5 C805 2.2u
CN
1V8_AUDSUB 1V8_AUDSUB
C817
2.2u
2.2u
C818
C816 0.1u
Figure 15 Audio amplifier PMIC
47/147
Line width 0.3mm
SPK_RCV_P
SPK_RCV_N
C808 C809
HSO_L
HSO_R 47p 47p
C807 C806
0.1u 0.1u
R804 R803
20 20
SD_1V8 1V8_AUDLDO 1V8_AUDLDO
220
FB801
R802
DNI
C801
DNI
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DNI
VBAT
U801
1 4
VOUT VDD
2 3
1V8A_LDO_ON
GND CE
C802
DNI
LGE Property
Only for training and service purposes