Transcript
2*50 watt @ 4ohm TK2050 Class-D Audio Amplifier Board User’s Guide
© 2004-2009 Sure Electronics Inc.
AA-AB014_Ver1.1
2*50 WATT@4OHM 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 WATT@4OHM 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 WATT@4OHM 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 WATT@4OHM 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 WATT@4OHM 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 WATT@4OHM 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 WATT@4OHM 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.
