Sure Electronics TK2050 User manual

2 X 100Watt Class-D Audio
Amplifier - TK2050
User’s Guide
©2004-2011 Sure Electronics Inc. AA-AB32183_Ver1.0

2 X 100Watt Class-D Audio Amplifier - TK2050
©2004-2011 Sure Electronics Inc. AA-AB32183_Ver1.0
To keep the product in a best working condition and having a long service time, please operate it according to
the relevant steps. The warranty lapses if the product is damaged because of incorrect use and your
negligence.
Warning: Never immerse the product in the rain or any other humid environment to prevent the fire or
electric shock.
Safety Precautions:
1. Carefully handle the power cord
Do not damage or deform the power cord, or it will cause the electric shock or abnormal
working.
Removing the power cord from the socket, please confirm what you’ve hold is the socket
not the power cord.
2. Never open the cover
Do not open the cover in order to prevent the electric shock. Any problem, please contact
us.
3. Never put other things in the product
Do not put the metal in the product and avoid any liquid in, or it will cause electric shock or
abnormal working.
Operation Precautions:
1. Care the power cord
When you pull out the plug from the socket, do not pull the power cord but hold the plug.
2. Prevention of the high temperature
Never put the product in the place exposed by the sun or near to the heating equipment.
3. Caution of the rack or chassis installation
Never put this product in a closed rack.
4. Never open the product
It’s dangerous to open the product or put your hand in it. If this product has something
wrong, pull out the power plug immediately and contact us.
5. Protect the chassis
Avoid spraying insecticides near the product. Do not wipe the product with liquid like
gasoline, thinner or other solvents, which easily cause the change of the quality or the
color. Use soft cloth to clean it.
6. When you go out
If you don’t use this product in a long time, e.g. when you go out for a trip, you must pull out
the plug from the power socket.
7. Take care with humidity, water and dust
Do not put this product in the highly humid position or the position with much dust. Do not
place vases or something with water in on this product.
8. Please keep the manual well
After reading this instruction, please keep it well. It will be helpful when there are faults.
Attention please. In order to explain clearly to users, the graphic representation in this
user’s manual may be some different from the real device.

2 X 100WATT CLASS-D AUDIO
AMPLIFIER - TK2050
USER’S GUIDE
©2004-2011 Sure Electronics Inc.
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Table of Contents
Chapter 1. Overview ..........................................................................................................1
1.1 Overview.............................................................................................................. 1
1.2 Accessory (Optional purchase)......................................................................... 1
1.3 Features............................................................................................................... 1
1.4 Applications......................................................................................................... 2
1.5 Components and Function................................................................................. 2
1.5.1 Front Panel............................................................................................................. 2
1.5.2 Back Panel.............................................................................................................. 3
1.5.3 Connection............................................................................................................. 3
Chapter 2. Hardware Detail ...............................................................................................4
2.1 Power Connection............................................................................................... 4
2.2 Button Setting ..................................................................................................... 4
2.3 Input Connection................................................................................................. 5
2.4 Output Connection.............................................................................................. 5
2.5 Volume Control.................................................................................................... 5
2.6 LED Indicators..................................................................................................... 5
2.7 Fault Tracing........................................................................................................ 6
Chapter 3. Electrical Characteristics ...............................................................................7
Chapter 4. Mechanical Drawing........................................................................................8
Chapter 5. Contact Us .......................................................................................................9

2 X 100Watt Class-D Audio Amplifier - TK2050
©2004-2011 Sure Electronics Inc
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NOTES:
Product Version ：Ver 1.0
Document Version ：Ver 1.0

2 X 100WATT CLASS-D AUDIO
AMPLIFIER - TK2050
USER’S GUIDE
©2004-2011 Sure Electronics Inc.
Chapter 1. Overview
1.1 Overview
Welcome to use this amplifier with aluminum alloy case by Sure Electronics. This
product features streamlined frame design, beautiful shape, portable carrying and
durable using.
This product supports dual-channel audio amplification with each channel 100W power
amplifier output and high fidelity sound output. And in order to ensure perfect sound
output, we use high-quality rotary encoder and the volume control chip for volume
control. It can ensure the precise adjustment and perfect volume output even after long
time use. It has built-in MCU control with over / under voltage, over current protection,
and LED indication during working.
Powered by supply from DC 24V, this amplifier can drive 4Ωor 8Ωpassive speakers.
FIGURE 1-1 OVERVIEW
1.2 Accessory (Optional purchase)
y27V 13A DC Switching Power Supply
y3.5mm to RCA cable
y5.5mm/2.1mm to 5.5mm/2.5mm tips connector
1.3 Features
yClass-D audio amplifier based on authentic TK2050 from Tripath
yWide working voltage range: 12 to 32V
yStreamlined aluminum alloy housing makes it more durable
yHigh-quality digital volume control IC ensures long time use and perfect sound
output
yFrequency response: 20Hz to 20KHz (±3dB)
yS/N rate: 100dB (A-weighted)
yHigh Output Power
30W @ 6Ω, <1% THD+N
40W @ 8Ω, <3% THD+N
100W @ 4Ω, <10% THD+N
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2 X 100Watt Class-D Audio Amplifier - TK2050
yHigh Efficiency
86% @ 60W, 8Ω
82% @ 46W, 6Ω
90% @ 100W, 4Ω
yAudiophile Quality Sound
0.007% THD+N @ 30W 8Ω
0.005% THD+N @ 70W 4Ω
yLine level and analog audio signal input
yMCU-based backlight of volume control knob-"LED ring", which shows the working
status of the product.
yAutomatically save volume setting after power off
yVolume Fade-in and fade-out
yOver/under voltage shutdown
yOver current protection
yOver temperature protection
1.4 Applications
yBackground Music Systems
yInteractive kiosks
yHome DIY
yCar audio
1.5 Components and Function
Please refer to the corresponding pages for the detailed information.
1.5.1 Front Panel
FIGURE 1-2 (TOGGLE SWITCH, VOLUME KNOB)
1—toggle switch 2—volume knob
©2004-2011 Sure Electronics Inc
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Overview
1.5.2 Back Panel
FIGURE 1-3 (POWER INPUT, SPEAKER OUTPUT, AUDIO SIGNAL INPUT)
3—speaker output terminal 4—audio signal input terminal
5—serialnumber 6—power input
1.5.3 Connection
FIGURE 1-4 CONNECTING SCHEMATIC
©2004-2011 Sure Electronics Inc.
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2 X 100WATT CLASS-D AUDIO
AMPLIFIER - TK2050
USER’S GUIDE
©2004-2011 Sure Electronics Inc.
Chapter 2. Hardware Detail
2.1 Power Connection
A high-performance power supply is important for an amplifier to output high-quality
sound and work stably. A high-quality power adapter is needed for this amplifier and you
can buy one from us. Please connect the power adapter with the audio power amplifier
according to the following schematic:
Pay attention to the power adapter when connecting. A 5.5mm/2.5mm power adapter or
a 5.5mm/2.1mm to 5.5mm/2.5mm tips connector is needed for connecting.
FIGURE 2-1 POWER CONNECTION SCHEMATIC
2.2 Button Setting
When toggle switch is ON, press the knob and make it between mute disable and enable
status.
LED shows breathing-effect light only when mute is enabled.
LED is on for no more than 1 second and then off when volume adjustment is activated
while mute is disabled.
When the toggle switch is OFF, the product is in the standby mode, and then LED is off.
FIGURE 2-2 BUTTON SETTING
TABLE 2-1 BUTTON FUNCTION
Toggle Switch State Product State LED State
Mute enabled LED lighting in a breathing-effect state
ON Mute disabled LED lighting no more than 1second when
volume adjustment is activated
OFF Standby mode LED off
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2 X 100Watt Class-D Audio Amplifier - TK2050
2.3 Input Connection
This product adopts RCA socket to input audio signal. A 3.5mm to RCA cable is needed.
FIGURE 2-3 INPUT CONNECTION
2.4 Output Connection
This product provides dual channel output by using banana jacks. Pay attention that
LOUT+ and LOUT- are Left Output Channels, ROUT+ and ROUT- are Right Output
Channels.
FIGURE 2-4 OUTPUT CONNECTION
Note: LOUT- and ROUT- are not in the same net and can not be connected together.
Moreover, LOUT+, LOUT-, ROUT+, ROUT- can not be connected to the ground
2.5 Volume Control
We adopt a rotary encoder and high quality digital volume control, ensuring high quality
signal output and high precision volume adjustment.
FIGURE 2-5 VOLUME CONTROL
2.6 LED Indicators
This product is based on MCU which controls the indicators to display dynamic LED
state and make this product more fashionable and attractive. Please refer to table 2-1 for
details.
©2004-2011 Sure Electronics Inc.
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Hardware Detail
©2004-2011 Sure Electronics Inc
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2.7 Fault Tracing
If the amplifier does not work well, please read the following table 2-3.
TABLE 2-3 CORRECTIVE MAINTENANCE
Situation Solutions
No sound
1. Check if it is connected with the power and confirm that the voltage
regulator works well. If not, connect the power according to the
schematics.
2. Check if the signal input cable is connected correctly and if there is
signal. If not, connect the lines according to the schematic and
input the audio signal.
3. Check if the output cable is damaged and if the speaker works or
not. If not, change the output cable and the speaker.
4. Check if toggle switch is on.
5 Check if LED is in a breathing-effect state, if it is, press the volume
knob and if not, adjust the volume control.
Suddenly no
sound when
the product is
working
Check if the product has worked for long time or if the audio signal is
too high. If it is, turn off the power and turn it on again.
Note: If the problems above still cannot be solved, maybe the product has something
wrong. Now please turn off the power, pull out the power cord from the socket and then
contact us. Please refer to chapter 5 for our contact information.

2 X 100WATT CLASS-D AUDIO
AMPLIFIER - TK2050
USER’S GUIDE
©2004-2011 Sure Electronics Inc.
Following table lists the typical value of all the parameters. For more details, please refer
to the datasheet of TK2050 by Tripath.
TABLE 3-1 BASIC PARAMETERS
Parameter Condition
Chapter 3. Electrical Characteristics
Min. Typ. Max.
Supply Voltage - 12V 24V 32V
Shutdown Current*- 7A 12A 16A
Mute=1 60mA 100mA 130mA
Toggle
Switch ON,
DC24V, No
Load
Mute=0
- 160mA -
Quiescent Current
Toggle Switch Off,
DC24V, No Load - 30mA -
Signal/Noise Ratio -
90dB
(A-weig
hted)
100dB
(A-weighted) -
Input Sensitivity A=0dB 0.720V 0.771V 0.800V
RL=4Ω, Pout=70W - 0.010% -
THD+N* RL=8Ω, Pout=30W - 0.007% -
Frequency Range - 20Hz to 20KHz（±3dB）
RL=4Ω, Pout=117W 86%
RL=6Ω, Pout=46W - 82% -
Efficiency@ VCC=32V
RL=8Ω, Pout=60W - 88% -
RL=4Ω, f=1000Hz - 50W -
THD+N<0.01% RL=8Ω, f=1000Hz - 35W -
RL=4Ω, f=1000Hz - 100W -
Output
Power THD+N<10% RL=8Ω, f=1000Hz - 60W -
Input Impedance - 11K 22K -
Offset Voltage
(adjustable) -10mV 0mV 10mV
Minimum Load - 3.2Ω- -
Channel Separation* Po=100W, RL=4ohm 80dB 95dB -
Power Gain* - 14V/V 16V/V 18V/V
Operating Temperature - 0℃20℃50℃
Storage Temperature - -20℃20℃105℃
Thermal Warning* - - 130℃-
Thermal Shutdown - - 150℃-
Note: Here only list the dB gain of TK2050. *The chip’s specifications from Tripath’s
TK2050 Data Sheet. Some parameters are modified according to the actual operations.
The volume control chip can reach a maximum of 11.25dB in preamplification.
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2 X 100WATT CLASS-D AUDIO
AMPLIFIER - TK2050
USER’S GUIDE
©2004-2011 Sure Electronics Inc.
Chapter 4. Mechanical Drawing
FIGURE 4-1 FRONT PANEL
FIGURE 4-1 BACK PANEL
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2 X 100WATT CLASS-D AUDIO
AMPLIFIER - TK2050
USER’S GUIDE
©2004-2011 Sure Electronics Inc.
Chapter 5. 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: [phone]
Fax: [phone]
Website: www.sure-electronics.com
Email: [e-mail]
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