Acer P205H - Page 74

5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A
A
Note6
Note1
Note:
1. Shut down control for BA20550, Logic low is placed on
this terminal for shut down mode, Logic high is placed on
this terminal for normal operation
2. Low-ESR capacitors are recommended throughout this
application section.
3. Bypass capacitor >=10*Ci (input capacitor)
4.You can use 22uH inductorhere instead of using BEAD to
achieve better sound quality.
5.If inductor 22uH is used, the filter Cs should be
changed:C725, C719, C722, C723: 0.1uFC720, C724: 0.47uF
6.Add EP701~EP706,R717,R718,Q702
Note5
Note3
Power Board
V0141
A3
BenQ 15W
BA20550/TI2008 SCH
2008-01-03
InnoLux
Document Number : SIZE :
TITLE :
DATE :
SHEET OF
Rev :
DRAWN BY :
CHECK BY :
APPRO BY :
AR
AL
shutdown
R_OUT+
L_OUT-
L_OUT+
VOL
AL
AR
AL
Audio5V
R_OUT-
AR
GND
shutdown
MUTE
ROUT_P
LOUT_P
ROUT_N
ROUT_P
LOUT_P
ROUT_NLOUT_N
LOUT_N
Audio5V
Audio5V
Audio5V
Audio5V
EP756
5P35V
C753
0.1/16V
R757 33K
C770
330p/50V
C771
470p/50V
C754 0.1/16V
C755
1u/16V
C762
0.1/16V
C772
330p/50V
C765
330p/50V
C759
10u/10V
R755
0/NC
C764
0.1/16V
C767
330p/50V
C768 4700p/50V
C758
0.1/16V
C766
470p/50V
C757
0.1/16V
EP751 5P35V/NC
R751 10K
EP753
5P35V
C763
1uF/10V
C756
10u/10V
R75347K
U751
BA20550-SSOP24
1
2
20
17
7
4
23
24
223
10
11
12
14
15
13
18
8
21
5
169
196
25
LINN
LINP
ROUTP
ROUTN
PVSS_A
PVDD_A
RINP
RINN
BYPASSSHUTDOWN
COSC
ROSC
VSS
VOLUME
NC
VDD
PVSS_A
LOUTN
PVDD_A
LOUTP
PVDD_APVDD_A
PVSS_APVSS_A
HEATSINK
R759 10K
C752
0.1/16V
R754
10K
Q751
PMBT3904
1
32
C760
220p/25V
FB752
600Ω 2A
EP754 5P35V/NC
EP755
5P35V
FB754
600Ω 2A
C761
1uF/10V
EP752
5P35V
FB751
600Ω 2A
C769 4700p/50V
R758 10K
R756 33K
C751
0.1/16V
CN751
2*8P 2.54mm 90°
9
2
4
10
8
6
1211
1
5
3
7
13
15
14
16
AL
+5V
AGND
AL
SHUT
VOL
ARAR
GND
EO_L
Hp/Sp
EO_R
ROUT+
ROUT-
LOUT+
LOUT-
FB753
600Ω 2A
R752120K
AL_in
L_OUT+
AR_in
R_OUT+
R_OUT-
AL_in
AR_in
VOL
L_OUT-