2*50 watt @ 4ohm TK2050 Class-D Audio Amplifier Board User`s

2*50 watt @ 4ohm TK2050 Class-D Audio Amplifier Board User`s
2*50 watt @ 4ohm TK2050 Class-D
Audio Amplifier Board
User’s Guide
© 2004-2009 Sure Electronics Inc.
AA-AB014_Ver1.1
2*50 [email protected] TK2050 CLASS-D
AUDIO AMPLIFIER BOARD
USER’S GUIDE
Table of contents
Chapter1.Overview ......................................................................................................................... 1
1.1 Welcome ......................................................................................................................... 1
1.2 Quick Start...................................................................................................................... 3
Chapter2.Hardware Detail .............................................................................................................. 5
2.1 Power Connection ......................................................................................................... 5
2.2 Input Connections ......................................................................................................... 5
2.3 Output Connections ...................................................................................................... 5
2.4 Connection with Next board ......................................................................................... 6
2.5 Mute Setting ................................................................................................................... 6
2.6 Gain settings .................................................................................................................. 6
2.7 DC offset......................................................................................................................... 6
2.8 LED Indicators ............................................................................................................... 7
2.9 Volume control ............................................................................................................... 7
Chapter3.Electrical Characteristics .............................................................................................. 8
Chapter4.Mechanical Drawing....................................................................................................... 9
Chapter5.Appendix ....................................................................................................................... 10
Schematics ............................................................................................................................. 10
Chapter6.Contact Us..................................................................................................................... 12
© 2004-2009 Sure Electronics Inc.
AA-AB014_Ver1.1_Page i
2*50 watt @4ohm TK2050 Class-D Audio Amplifier Board
NOTES:
Product Version
:
Ver 1.0
Document Version
:
Ver 1.1
AA-AB014_Ver1.1_Page ii
© 2004-2009 Sure Electronics Inc.
2*50 [email protected] TK2050 CLASS-D
AUDIO AMPLIFIER BOARD
USER’S GUIDE
Chapter1.Overview
1.1 Welcome
This self-made 2*50W audio amplifier board is a perfect class-D architecture integrated with Tripath
TC2000 and TP2050. It supports dual channel amplification and can readily be powered by any DC
power supply ranging from +10 to 36V. You can use it to drive any 4Ω or 8Ω passive speakers.
As quoted from the datasheet of Tripath, TC2000 is a two-channel audio controller that uses Tripath’s
proprietary Digital Power Processing (DPPTM) technology. When combined with switching power output
stages, the TC2000 allows the implementation of a complete Class-T audio amplifier. TP2050 is a stereo
power stage capable of 50W continuous average power per channel, Class-T Digital Audio Power
Amplifier using Tripath’s proprietary Digital Power ProcessingTM technology. The TP2050 can be
coupled with a Class-T controller such as TC2000 or TC2001 to produce a high-quality stereo amplifier.
To put it simple, TC2000 converts analogue audio signal it receives into digital signal and TP2050
amplifies the digital signal from TC2000. This amplifier board integrates one TP2050 chips to support
dual channel amplification of up to 50W each. The absolute maximum voltage of TP2050 chip is rated at
40V, so 36V is the very maximum recommended rail voltage. The maximum voltage of TC2000 shall not
exceed 5V.
Figure 1 Product Diagram
Notice: The diagram above is used for reference only.
© 2004-2009 Sure Electronics Inc.
AA-AB014_Ver1.1_Page 1
Overview
Features:
y
Fully bridged stereo output, the output of this product cannot be bridged again.
y
Maximum voltage of power supply is 36V
y
Line level analogue audio input
y
Sensitivity and gain are adjustable with on-board DIP switch
y
+5V screw terminal for mute
y
Over / under voltage turn off
y
Over current protection
y
Over temperature protection
Applications
y
Powered Subwoofers
y
Home Theater Receivers
y
Multi-channel Distribution
y
Powered DVD Systems
y
Mini/Micro Systems
Benefits
y
Mounting holes are available for easy installation and fix
y
Several wiring methods facilitate connection
y
The design of power supply allows you to connect more amplifier boards.
y
Excellent heat sink eliminates your worry over heat dissipation.
AA-AB014_Ver1.1_Page 2
© 2004-2009 Sure Electronics Inc.
Overview and Main Feature
1.2 Quick Start
Suggested connection is shown in Figure 2.
Figure 2 Connection Schematic
Notice:
Please observe the following steps to complete verification so as to ensure the products are intact
during transit.
1. Open the amplifier package and make sure the product is intact (No missing or damaged
components and no deformation)
2. Please observe the connection diagram when connecting the amplifier board. Use a nearby sound
source, such as MP3 or CD player to have a trial. This amplifier board can be deemed as qualified
if you can hear the sound correspond to that sound source.
© 2004-2009 Sure Electronics Inc.
AA-AB014_Ver1.1_Page 3
Overview
Figure 3 Cascade Schematic
Notes:
1. GND should be connected to ground or the housing of your instrument.
2. Never connect “OUT1-” and “OUT2-“since they are not in the same net.
AA-AB014_Ver1.1_Page 4
© 2004-2009 Sure Electronics Inc.
2*50 [email protected] TK2050 CLASS-D
AUDIO AMPLIFIER BOARD
USER’S GUIDE
Chapter2.Hardware Detail
2.1 Power Connection
To power the amplifier board, use either jack or terminal blocks. On-board diodes can prevent the
consequence of wrong connection of power supply.
Connector Mark
Description
Jack
J3
Terminal
Blocks
J1
J5
DC 10-36V Power Supply
VCC
GND
Positive (+) of DC 10-36V Power Supply
Negative (GND) of DC 10-36V Power Supply
Warning:
You are allowed to use only one way for powering the amplifier board at a time.
The maximum voltage of power supply shall not exceed 36V.
2.2 Input Connections
You may use either RCA connectors or terminal blocks to input audio signal.
Connector Mark
RCA Connectors
Terminal Blocks
J7
J9
J8(PIN1)
J8(PIN3)
Channel
Channel 1 Input
Channel 2 Input
Channel 1 Input
Channel 2 Input
Warning:
You are allowed to feed only one group (dual channel) of audio signal to the amplifier board at a time.
Please refer to 2.6 “Gain Setting” for details.
2.3 Output Connections
You can use either terminal blocks or banana connectors to output audio signal. Two pairs of banana
connectors are provided for free.
Connector Mark
Banana Connectors
Terminal Blocks
Refer to on-board
descriptions for
connection details
J10
J12
J15
J13
J11
J14
Description
Positive output of Channel 1
Negative output of Channel 1
Positive output of Channel 2
Negative output of Channel 2
Output of Channel 1
Output of Channel 2
Warning:
Never connect more than one group of speaker to the audio output.
© 2004-2009 Sure Electronics Inc.
AA-AB014_Ver1.1_Page 5
Hardware Detail
2.4 Connection with Next board
J4 and J2 on terminal block are used to connect more amplifier board.
Connector Mark
J4
VDD
J2
GND
Notice:
Description
Positive (+) of DC 10-36V Power Supply to next board
Negative (GND) of DC 10-36V Power Supply to next board
It is allowed to connect more amplifier boards in series, but it would be better to limit that number to 4.
Remember to use AWG12-compliant cable or equivalent for series connection.
2.5 Mute Setting
To mute the output audio signal, connect “+5V” and “MUTE” of the terminal block with a piece of
lead. In normal use, “MUTE” shall be left unconnected.
Connector Mark
J6
MUTE
Description
When “MUTE” is connected with “+5V”, both amplifiers will
be muted and enter into idle mode. When connected to
ground or left disconnected, both amplifiers will resume to
regular operation.
Notice:
When you select power supply for the board, the appropriate voltage is DC 10-36V. Never connect
"MUTE" on the terminal block to any power supply or any other voltage higher than 5V.
2.6 Gain settings
The on-board 4-slide DIP switch, which is marked as “SW1”, is used to set the gain of amplifier
board. 4 slides are marked as K1, K2, K3 and K4 respectively. K1 and K2 are used to set the gain of
channel 1 while K3 and K4 are used for channel 2. The following table lists the gain values on different
settings:
Channel 1 Setting
K1
K2
ON
OFF
ON
OFF
ON
ON
OFF
OFF
Channel 2 Setting
K3
K4
ON
OFF
ON
OFF
ON
ON
OFF
OFF
Gain
Level
High
Medium
Medium
Low
Amplifier Gain
Power Gain (dB)
Voltage Gain (V/V)
Typical
Typical
24
16
30
32
30
32
34
48
Tips:
High: Portable MP3/CD player with built-in volume control.
Medium: General-purpose use
Low: Preamplifier with fairly high output signal
2.7 DC offset
If it is not quite necessary, DO NOT trim the output offset by adjusting “R5” and”R26”-two
potentiometers on board since we have already regulated that offset to a range of +/- 10mV. You may
refer to the connection diagram for the location of potentiometers.
AA-AB014_Ver1.1_Page 6
© 2004-2009 Sure Electronics Inc.
Hardware Detail
Warning:
Never adjust these potentiometers if it’s not quite necessary, it may damage your speakers.
2.8 LED Indicators
This amplifier board has two indicators, one of which is marked as “Power (D3)”; another is “Hmute
(D4)”. The power indicator will be illuminated in green on power-up and “Hmute” will be illuminated in
blue when you mute the amplifier audio output or amplifier board error occurs. Please refer to the
TK2050 Data Sheet for a complete description of HMUTE. Please refer to the Board Connection
Diagram for the LED locations on amplifier board.
2.9 Volume control
This amplifier board doesn’t include any potentiometer which could be used to manually adjust the
volume control. Users may use the volume control of the sound source (such as MP3 player or PC) to
adjust the loudness of the audio output. If you need a potentiometer, you may install one (50Kohm) by
yourself, but it may void the warranty at the same time. Another reason for not installing potentiometer
is the signal attenuation it may occur after installation. To compensate that attenuation, adjusting the
gain value is required. You may refer to 2.6 Gain setting for details.
Please be aware that audio clippings (waveform distortion) may occur for some portable players, these
are the clippings generated by the audio source, not the amplifier itself; please increase the input gain
of amplifier board.
© 2004-2009 Sure Electronics Inc.
AA-AB014_Ver1.1_Page 7
2*50 [email protected] TK2050 CLASS-D
AUDIO AMPLIFIER BOARD
USER’S GUIDE
Chapter3.Electrical Characteristics
The following table lists all typical data. For full specifications, please refer to the Tripath data sheet
of TK2050 chip.
Supply voltage
Over-current
shutdown
Signal/Noise Ratio
THD+N
Channel separation
Efficiency
Output power 4
ohm*@30V rail
Output power 8
ohm*@30V rail
Offset voltage
Min
10V
3.5A
Output noise
Input impedance
Power stage gain
Thermal warning*
Thermal shutdown*
Notice: *The chip specifications by Tripath.
AA-AB014_Ver1.1_Page 8
Typical
24V
6A
Max
36V
8A
80dBA
Not tested
95dB
85%-90%
75W<0.01THD+N,
115W 10% THD+N
35W<0.01THD+N,
60W 10% THD+N
Adjustable below
100mV
135mV
Nominally 22 to 47 K
Set by dip switch
130ºC
150ºC
© 2004-2009 Sure Electronics Inc.
2*50 [email protected] TK2050 CLASS-D
AUDIO AMPLIFIER BOARD
USER’S GUIDE
Chapter4.Mechanical Drawing
Figure 4
Symbol
Inch
mm
L
4.80
121.92
© 2004-2009 Sure Electronics Inc.
L1
4.40
111.76
W
4.00
101.60
W1
3.60
91.44
AA-AB014_Ver1.1_Page 9
2*50 [email protected] TK2050 CLASS-D
AUDIO AMPLIFIER BOARD
USER’S GUIDE
Chapter5.Appendix
Schematics
VCC
D1 SS34/DO-214AB
1
2
1
0.1uF/50V
VOUT
VOUT
2
4
1
C2
0.1uF/50V
VIN
+ C3
C5
47uF/50V
0.1uF/50V
R2
3K
2
1
+ C4
R3
100uF/10V
1K
R1
C6
1K
0.1uF/50V
2
CON2
C1
3
1
2
J2
+5V
U1 LM317EMP/SOT-223
D2 SS34/DO-214AB
1
2
VADJ
CON2
1
J1
22uF/33uF
D3
2
CON2
VCC
VCC
1
J4
VCC
1
LED/G
DJ005B
1
2
3
1
J3
2
+ C7
+ C8
2
2
VCC
VCC
VCC
1
220uF/50V
1
220uF/50V
2
J5
C10
+ C9
1
220uF/50V
1
VCC
R4
0.22uF//MKP
0R
CON2
2
VCC
1
+ C11
+5V
1
MUTE
220uF/50V
C14
+ C13
220uF/50V
0.22uF//MKP
220uF/50V
2
2
+ C12
2
CON2
2
J6
+5V
1
U2
R5
2
R6 470K
10K/EVM3ESX50B14
C15
R8
3
0.1uF/50V
C16
0.22uf /MKP
C17
1uF/50V
CH1
Gain1A
R11 22K
16
17
470K
18
19
+5V
Gain1B
20
C18
0.1uF/50V
22K
R16 22K
CON3
1
CH1
SW1
Gain1A
2
3
1
2
3
4
Gain2A
8
7
6
5
R18
R19
R20
R21
22K
22K
22K
22K
NC
VLO
Y2
OVRLDB
VHI
GND
Y1
HUMTE
21
22
14
13
12
11
10
9
Y2
Y 2B
Y 1B
Y1
8
D4
7
V5
LED/B
R12
1K
R13
15K
R15
C19
1K
390pF/50V
VP1
IN1
FDBKP1
OUT1A
R17 15K
6
OUT1B
MUTE
Gain2B
C20
CH2
Y 2B
FDBKN1
23
Gain1B
OCD2
OCD1
+5V
1
J8
REF
TC2000/SOIC
Y 1B
R10 22K
R14
CH1
15
R9 10K
2
J7
R7 8.2K
1uF/50V R23 10K
+5V
SW DIP-4
24
MUTE
R24
+5V
VPWR
10K
C21
1K
390pF/50V
5
R25 15K
4
OUT2A
1
FDBKN2
R22
R26
2
R27 470K
25
+5V
26
3
10K/EVM3ESX50B14
C23
R29
0.1uF/50V
470K
0.22uf /MKP
C25
1uF/50V
J9
2
CH2
Gain2A
R32 22K
Gain2B
BBM1
DCMP
R30 22K
C24
BBM2
27
28
VP2
IN2
FDBKP2
BIASCAP
3
R28
C22
1K
390pF/50V
R31 15K
2
OUT2B
1
C26
R33
C27
0.1uF/50V
1K
390pF/50V
R34
1
CH2
AA-AB014_Ver1.1_Page 10
22K
© 2004-2009 Sure Electronics Inc.
Appendix
+5v
U3
Y1
29
23
OUT1A1
CONFIG
OUT1A2
OUT1A
L1
17
16
10uH
C29
C30
6.8uF/50V
0.47uF/MKP
J10
OUT+
C31
1
R35
IBIAS
15
10k
R40
10K
14
C33
0.1uF/50V
27
C35
0.1uF/50V
Y 1B
R41
28
30
18
10K
Y2
31
21
22
33
34
C40
C41
0.1uF/50V
0.1uF/50V
35
36
C44
20
FAULT
TRISTATE
TH_WAR
Y 2B
19
1
OUT1B2
C32
C34
0.47uF/MKP
12
L2
11
10
R36 R37 R38 R39
1
C36
10uH
0.22uF/MKP
2
J11 CON2
1206
47R 47R 47R 47R
J12
OUT-
OUT1B
6.8uF/50V
IN1B
GND1B
13
NC
IN2A
VDD1
VDD2
VSS1
VSS2
VCCSIGN1
VCC
VCC2A
OUT2A1
OUT2A2
GNDREG
IN2B
L3
8
9
GND2A
10uH
C37
C38
6.8uF/50V
0.47uF/MKP
6
J13
OUT+
C39
VCC2B
OUT2B1
C43
OUT2B2
0.47uF/MKP
4
L4
3
2
0.47uF/MKP
C42
1
50V
VCC
GNDCLEAN
GNDSUB
OUT2A
7
VCCSIGN2
0.1uF/50V
32
VCC1B
OUT1B1
0.47uF/MKP
50V
VCC
26
+5V
PWRDN
GND1A
1
25
1
0.1uF/50V
24
VCC1A
C45
10uH
R42 R43 R44 R45
0.22uF/MKP
2
J14 CON2
47R 47R 47R 47R
1206
1
C28
VCC
TP2050/PowerSO36
IN1A
J15
OUT-
OUT2B
6.8uF/50V
GND2B
5
Figure 5 Schematics
Notice: The above schematics are used for reference only. There might be a tiny difference in
production batch.
© 2004-2009 Sure Electronics Inc.
AA-AB014_Ver1.1_Page 11
2*50 [email protected] TK2050 CLASS-D
AUDIO AMPLIFIER BOARD
USER’S GUIDE
Chapter6.Contact Us
Sure Electronics Co., Ltd.
5F, Zone A,
Qinhuai Technology Innovation Center
105-2 DaMing Rd (ZIP:210022)
Nanjing
P.R.China
Tel:
+86-13601408832 (For technical questions only)
+86-25-66606340 (English service, from GMT1-10AM)
Fax:
+86-25- 66606341-822
Website:
www.sure-electronics.com
www.sure-electronics.net
AA-AB014_Ver1.1_Page 12
© 2004-2009 Sure Electronics Inc.
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