Sure Electronics TK2050 User Manual page 17

2*100W @4Ω TK2050 Class-D Audio Amplifier Board
FIGURE 5-2 SCHEMATIC 2
J3 CON2 D1 SS34/DO-214AB
1 2
1
D2 SS34/DO-214AB
1 2
2
C2
0.1uF/50V
J4 CON2
1
2
J5 DJ005B
1
2
3
J6 CON2
2
1
J7 CON2
2
1
J8 CON2
+5V
2
1 MUTE
J10 CON3
1 CH1
2
3 CH2
C18 0.22uf /MKP
CH1
C19 1uF/50V
J11 D4
R23
TVS/DO-214AB 22K
CH1
SW1
Vin1 1
2
Vin2
3
4
SW DIP-4
C24 0.22uf /MKP
CH2
C26 1uF/50V
J12 D6
R39
CH2 TVS/DO-214AB
22K
Nets of audio signal
must be very short.
AA-AB32181_Ver1.0_Page 14
VCC
U2 LM317EMP/SOT-223
3 2
VIN VOUT
4
VOUT
C4 C3
+
0.1uF/50V 100uF/10V
R11 3K R12 1K
VCC VCC VCC
C9 C10 C11
+ + +
220uF/50V 220uF/50V 220uF/50V
+5V
Vin1
Vin2
+5V
R16 R17 470K
2
10K/EVM3ESX50B14
Vin1
C17
0.1uF/50V
8 Vout1 R27 22K
7 R29 22K
6 Vout2 R30 22K
5 R31 22K
+5V
R35 R36 470K
2
Vin2
10K/EVM3ESX50B14
C27
0.1uF/50V
+5V
R10
C5
1K
0.1uF/50V
D3
LED/G
VCC
C12 R15 0R
0.22uF/MKP
J9
1 2
3 4 Vout1
5 6
7 8 Vout2
9 10
11 12
CON12
U4 TC2000/SOIC
R18 8.2K
15
REF
16
OCD1
R19 R20 10K
17
VLO
470K
18
OVRLDB
R21 22K
19
+5V VHI
20
GND
+5V
C20
0.1uF/50V
21
V5
R26 22K
22
VP1
23
IN1
MUTE
C22 1uF/50V
24
+5V
MUTE
R33
10K
25
+5V BBM2
26
BBM1
R38
470K
R40 22K
27
VP2
28
IN2 BIASCAP
U3 LM317EMP/SOT-223
3 2
VCC VIN VOUT
4
VOUT
C7
0.1uF/50V
R13 3K R14 470R
VCC VCC VCC
C13 C14 C15
+ + +
220uF/50V 220uF/50V 220uF/50V
14
OCD2
13
NC
12
Y 2 Y 2
11
Y 2B Y 2B
HUMTE
10
Y 1B
Y 1B
9
Y 1 Y 1
LED/B
D5
8 R22 1K
HUMTE
7 R24 15K
OUT1A
FDBKN1
R25 C21
1K 390pF/50V
R28 15K
6
FDBKP1 OUT1B
R32 C23
1K 390pF/50V
5
VPWR
R34 15K
4
OUT2A
FDBKN2
R37 C25
1K 390pF/50V
3
DCMP
R41 15K
2
FDBKP2 OUT2B
1
C28 R42 C29
0.1uF/50V 1K 390pF/50V
© 2004-2009 Sure Electronics Inc
+12V
C6 C8
+
100uF/25V 0.1uF/50V
VCC
C16
0.22uF/MKP
Resistor and capacitor
must be close to U2