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

© 2004-2009 Sure Electronics Inc. AA-AB014_Ver1.1

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

User’s Guide

2*50 WATT@4OHM TK2050 CLASS-D AUDIO AMPLIFIER BOARD

USER’S GUIDE

© 2004-2009 Sure Electronics Inc. AA-AB014_Ver1.1_Page i

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

Table of contents

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

© 2004-2009 Sure Electronics Inc. AA-AB014_Ver1.1_Page ii

NOTES: Product Version ： Ver 1.0 Document Version ： Ver 1.1


USER’S GUIDE

© 2004-2009 Sure Electronics Inc. AA-AB014_Ver1.1_Page 1

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.

Chapter1.Overview

Overview


Features: Fully bridged stereo output, the output of this product cannot be bridged again. Maximum voltage of power supply is 36V Line level analogue audio input Sensitivity and gain are adjustable with on-board DIP switch +5V screw terminal for mute Over / under voltage turn off Over current protection Over temperature protection

Applications Powered Subwoofers Home Theater Receivers Multi-channel Distribution Powered DVD Systems Mini/Micro Systems

Benefits Mounting holes are available for easy installation and fix Several wiring methods facilitate connection The design of power supply allows you to connect more amplifier boards. Excellent heat sink eliminates your worry over heat dissipation.

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.

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.


USER’S GUIDE


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 DC 10-36V Power Supply

J1 VCC Positive (+) of DC 10-36V Power Supply Terminal Blocks J5 GND 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 Channel J7 Channel 1 Input RCA Connectors J9 Channel 2 Input J8(PIN1) Channel 1 Input Terminal Blocks J8(PIN3) 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 Description J10 Positive output of Channel 1 J12 Negative output of Channel 1 J15 Positive output of Channel 2 Banana Connectors

J13 Negative output of Channel 2 J11 Output of Channel 1 Terminal Blocks

Refer to on-board descriptions for connection details

J14 Output of Channel 2

Warning: Never connect more than one group of speaker to the audio output.

Chapter2.Hardware Detail

Hardware Detail


2.4 Connection with Next board J4 and J2 on terminal block are used to connect more amplifier board.

Connector Mark Description J4 VDD Positive (+) of DC 10-36V Power Supply to next board J2 GND Negative (GND) of DC 10-36V Power Supply to next board

Notice: 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 Description

J6 MUTE

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 Channel 2 Setting Amplifier Gain

K1 K2 K3 K4 Gain Level

Power Gain (dB) Typical

Voltage Gain (V/V) Typical

ON ON ON ON High 24 16 OFF ON OFF ON Medium 30 32 ON OFF ON OFF Medium 30 32 OFF OFF OFF OFF Low 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.

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.


USER’S GUIDE


The following table lists all typical data. For full specifications, please refer to the Tripath data sheet

of TK2050 chip. Min Typical Max Supply voltage 10V 24V 36V Over-current shutdown

3.5A 6A 8A

Signal/Noise Ratio 80dBA THD+N Not tested Channel separation 95dB Efficiency 85%-90% Output power 4 ohm*@30V rail

75W<0.01THD+N, 115W 10% THD+N

Output power 8 ohm*@30V rail

35W<0.01THD+N, 60W 10% THD+N

Offset voltage Adjustable below 100mV

Output noise 135mV Input impedance Nominally 22 to 47 K Power stage gain Set by dip switch Thermal warning* 130ºC Thermal shutdown* 150ºC Notice: *The chip specifications by Tripath.

Chapter3.Electrical Characteristics


USER’S GUIDE


Figure 4

Symbol L L1 W W1 Inch 4.80 4.40 4.00 3.60 mm 121.92 111.76 101.60 91.44

Chapter4.Mechanical Drawing


USER’S GUIDE


Schematics

+ C4

100uF/10V

12

VCC

+ C11

220uF/50V

12

J6 CON2

2

1

+5V

R3 1K

J1 CON2

1

2

R1

1K

+ C13

220uF/50V

12

VCC

D3

LED/G

VCC

D2 SS34/DO-214AB1 2

U1 LM317EMP/SOT-223

3

1

24VIN

VAD

J VOUTVOUT

VCC

C14

0.22uF//MKP

+ C8

220uF/50V

12

VCC

22uF/33uF

+ C12

220uF/50V

12

+5V

MUTE

VCC

J4 CON2

2

1

+ C3

47uF/50V

12

+ C9

220uF/50V

12

D1 SS34/DO-214AB1 2

J3 DJ005B

321

R2 3K

R4 0R

C6

0.1uF/50V

+ C7

220uF/50V

12

C2

0.1uF/50V

C1

0.1uF/50V

J5 CON2

2

1

C10

0.22uF//MKP

J2 CON2

1

2

VCC

C5

0.1uF/50V

VCC VCC

C24 0.22uf /MKP

C27

390pF/50V

R23 10K C21

390pF/50V

R13 15K

OUT2B

MUTEGain2A

Y1B

R16 22K

R19 22K

Gain2B

Gain1B

C20 1uF/50V

R32 22K

CH2

R33

1K

D4 LED/B

R14

22K

R9 10K

U2 TC2000/SOIC

1

2

3

4

5

6

28

27

26

24

25

23

22

21

20

19

18

17

16

15

9

14

13

12

7

8

10

11

BIASCAP

FDBKP2

DCMP

FDBKN2

VPWR

FDBKP1

IN2

VP2

BBM1

MUTE

BBM2

IN1

VP1

V5

GND

VHI

OVRLDB

VLO

OCD1

REF

Y1

OCD2

NC

Y2

FDBKN1

HUMTE

Y1B

Y2B

R15

1K

CH1

+5VR24

10K

C23

0.1uF/50V

J9

CH2

12

+5V

C19

390pF/50V

C25 1uF/50V

C180.1uF/50V

R29

470K

Y2

Gain1A

OUT1AJ7

CH1

12

R18 22KSW1

SW DIP-4

1234

8765

CH2

Gain1B

C15

0.1uF/50V

R25 15K

R22

1K

R30 22K

J8 CON3

1

2

3

+5V

R21 22KGain2B

C16 0.22uf /MKP Y1

R26

10K/EVM3ESX50B14

13

2

C17 1uF/50VR12 1K

R10 22K

+5V

R11 22K

CH1

C26

0.1uF/50V

Y2B

+5V

R8

470K

R5

10K/EVM3ESX50B14

13

2

R34

22K

R6 470K

R20 22K

OUT2A

+5V

R7 8.2K

Gain2A

Gain1A OUT1B

R17 15K

R27 470KR28

1K

R31 15K

C22

390pF/50V

Chapter5.Appendix

Appendix


L3 10uH

C44

0.1uF/50V

C40

0.1uF/50V

C30

0.47uF/MKP

50V

R36

47R

R41

10K

U3

23

29

24

27

26

25

28

30

18

31

21

22

33

34

35

36

20

32

15

17

16

14

12

11

10

7

13

8

9

6

4

3

2

5

19

1

IBIAS

IN1A

CONFIG

FAULT

TRISTATE

PWRDN

TH_WAR

IN1B

NC

IN2A

VDD1

VDD2

VSS1

VSS2

VCCSIGN1

VCCSIGN2

GNDREG

IN2B

VCC1A

OUT1A1

OUT1A2

GND1A

VCC1B

OUT1B1

OUT1B2

VCC2A

GND1B

OUT2A1

OUT2A2

GND2A

VCC2B

OUT2B1

OUT2B2

GND2B

GNDCLEAN

GNDSUB

C34

0.47uF/MKP

J14 CON22

1

1206

C38

0.47uF/MKP

R37

47R

Y1B

R38

47R

R43

47R

C35

0.1uF/50V

R44

47R

C41

0.1uF/50V

C29

6.8uF/50V

R39

47R

OUT1B

C43

0.47uF/MKP

R35

10k

C28

0.1uF/50V

C39

0.47uF/MKP

C32

0.22uF/MKP

1206

TP2050/PowerSO36 VCC

50V

R42

47R

VCC

J10OUT+

1

OUT2B

J11 CON22

1

L2 10uH

R45

47R

OUT1A

L4 10uH

R40

10K

C45

6.8uF/50V

+5VC36

6.8uF/50V

VCC

Y1

VCC

C42

0.22uF/MKP

Y2B

C33

0.1uF/50V

J12OUT-

1

C37

6.8uF/50V

+5v

L1 10uH

Y2

J15OUT-

1

OUT2A

C31

0.47uF/MKP

J13OUT+

1

Figure 5 Schematics

Notice: The above schematics are used for reference only. There might be a tiny difference in production batch.


USER’S GUIDE


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

Chapter6.Contact Us

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

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