Page 1
2X15W Class-D Stereo Power Amplifier Kit User’s Guide
Contact Us
Sure Electronics Co., Ltd.
East zone, 3F, Building 6
Jingang Technology Innovation Center
No.108 Ganjiabian Rd (ZIP: 210000)
Qixia District
Nanjing
P.R.China
Tel: +86-25-68154800-860
Fax: +86-25-68154891-832
Website: www.sure-electronics.com
Email: customerservice@sure-electronics.com
Overview
This is a Class-D audio amplifier kit designed to make use of the TPA3122D2 power
amplifier IC. Completing this kit, you will have a fully functional, dual-channel audio amplifier.
This amplifier is capable of delivering up to 15W per channel (8Ω at 28V) and can be
powered by a wide range of 10V to 30V. Gain can be selected via a 2-slide switch from
weak(20dB), low(26dB), medium(32dB) or high(36dB). The efficiency of TPA3122D2
eliminates the need for an external heat sink when playing music. All components are
through-hole and easy to be soldered on the PCB. This kit includes:
Item Description Quantity
Resistors
Capacitors
Inductors L1,L2 10uH 3A 2
Amplifier Chip U1
Diode D1 1N5822 3A 40V 1
LED D2 3mm Green 1
Printed Circuit Board
DC Input Jack J12 DJ005B 3pin 1
2-Slide Switch SW1 2.54mm pitch 1
RCA Sockets J3,J4 red (J3), white (J4) 2
Accessory - 3.5 to RCA Cable 1
Note: As to audio signal output, we don’t provide components which should be prepared by
users themselves.
R1,R2,R3,R4,R5,R6,
R7,R8,R9
C1,C2,C5,C6,C9,C12 0.68uF(684K) mylar 6
C3,C4,C13,C14,C15,
C18,C21,C22
C7,C8,C10,C11,C16,
C17,C19,C20
10Kohm 1/4W 9
1uF(105) monolithic 8
220uF 35V electrolytic 8
TPA3122D2 20-pin DIP
package + 20-pin IC socket
121.90(L) × 91.40(W) × 1.60(H)
±0.20mm
1
1
4
1
Page 2
2X15W Class-D Stereo Power Amplifier Kit User’s Guide
PCB Layout
Some interfaces are reserved on the PCB providing another way of input and output, such
as audio signal input (J1, J2), audio signal output (J5, J6 ) and power input (J11). What you
need to do is to get some screw terminals and solder them. Except J5 and J6, you can also
install banana jacks in J7, J8, J9 and J10 to output audio signal.
Circuit Diagram
R3
10K
R4
10K
C9 0.68uF /MKS
C7 220uF/35V
+
1 2
C8 220uF/35V
+
1 2
C5
0.68uF/MKS
C6
0.68uF/MKS
+
1 2
C10 220uF/35V
+
1 2
C11 220uF/35V
C12 0.68uF/MKS
VCC
12
C16
+
220uF
VCC VCC
12
C19
+
220uF
VCC
12
+
12
+
C17
220uF
C20
220uF
J7 OUT1+
1
1
J8 OUT1-
J9 OUT2-
1
1
J10 OUT2+
VCC
C18
1uF
VCC
C21
1uF
J5 CON2
1
2
1
2
J6 CON2
J1 CON2
1
2
J2 CON2
1
2
J11 CON2
1
2
J12 DJ005B
J15 CON2
1
2
J13 CON2
1
2
1
2
3
J3
CH1
1 2
J4
CH2
1 2
R7
10K
R1 10K
C1 0.68uF/MKS
C2 0.68uF/ MKS
C14 1uF
R2
C13 1uF
10K
D1 1N5822
1 2
VCC
MUTE
U1 TPA3122/DIP
1
VCC
MUTE
VCC
PVCCL
2
SD
SD
3
MUTE
4
LIN
5
RIN
6
BYPASS
7
AGND1
8
AGND2
9
VCLAMP
10 11
PVCCR PGNDR
VCC
VCC
R5
10K
D2
LED/G
J14 CON2
1
2
VCC
20
PGNDL
19
LOUT
18
BSL
17
AVCC1
16
AVCC2
15
GAIN0
14
GAIN1
13
BSR
12
ROUT
VCC
R6
10K
SD
C15
1uF
SD
GAINA0
GAINA1
R8 10K
C3 1uF
GAINA0
GAINA1
C4 1uF
R9 10K
1
2
SW1
SW-2/DIP
L1 33uH
C22
1uF
L2 33uH
4
3
VCC
2
3
Loading...