Class D Audio Amplifier Board - TDA7492 User`s
Contents
1. SURE electronics Class D Audio Amplifier Board TDA7492 User s Guide 2004 2011 Sure Electronics Inc AA AB32189 AA AB32174 AA AB34165 Ver1 0 CLASS D AUDIO AMPLIFIER o SURE BOARD TDA7492 amp electronics USER S GUIDE Table of Contents Chapter e 1 OVETVICW baba M 1 juil jme aaa nasi 2 1 9 ADDIICallOnS u uuu u rao bus 2 14 a aaa 2 1 5 uuu u u d som iata 3 Chapter 2 Hardware uuu akak aga atak ana 5 2 1 Power CONNGGUON uy y A aa E 5 2 2 Input AK Eu eet ea a a a 5 2 39 Output GoHnectiolis u uu eect eel 6 2 4 LED IBdiCa uuu u u SA AE era ddr cone TE EE cubi lupa utut acero 7 2 5 Volume Control aa cc na DEREN ERO M Dn Ska Baga A eed tandis aa 7 210 9 8 Chapter 3 Electrical Characteristi uuu uuu xeu gena a aa aa aaa ta etu aja a aska a a aaa 9 Chapter 4 ake 11 Chapters Contact US uuu ulluy a neve cena cus ana U ana aaa ag d sn 12 Eu FV A AA S 2004 2011 Sure Electronics Inc AA AB32189 am2. FRONT VIEW SURE 9 electronics m ET 2004 2011 Sure Electronics Inc AA AB32189 AA AB32174 AA AB34165 Ver1 0 Page 1 Class D Audio Amplifier Board TDA7492 FIGURE 1 2 ACCESSORIES PACKAGE OPTIONAL Auxiliary lead Bevel washer 22 Washer x4 Banana jack Headset jack to RCA cable Note diagrams above are used for reference only 1 2 Features e A perfect Class D architecture Frequency response 20Hz to 20KHz 3dB e Four selectable fixed gain settings of nominally 25 6 dB 31 6 dB 35 1 dB and 37 6 dB e Single end audio signal input e Over under voltage protection e Over current protection Over temperature protection 1 3 Applications lt is the ideal solution for any sound reinforcement installation or application needing an affordable compact PA system e Background Music Systems e Vending machines Lifts Interactive kiosks Home DIY e Car audio 1 4 Benefits e Mounting holes facilitate installation and fixing e Several wiring methods facilitate connection RCA Socket Default Terminal Block Optional e Excellent design of the power ports which allows you to connect multiple amplifier boards in series Terminal Block Optional e Excellent heat dissipation eliminates the requirement of an extra heat sink AA AB32189 8 AA AB32174 amp AA AB34165 Ver1 0 Page 2 2004 2011 Sure Electronics Inc Overview 1 5 Q
3. L TABLE 2 1 POWER CONNECTION Connector Mark Jack DC power supply socket J9 The positive of power supply socket The negative of power supply socket Blocks Note 1 You allowed to use only one way to power the amplifier board at a time 2 The maximum supply voltage shall be referred to Chapter 3 2 2 Input Connections You may use RCA connectors to input audio signal 2004 2011 Sure Electronics Inc AA AB32189 amp AA AB32174 amp AA AB34165 Ver1 0 Page 5 Class D Audio Amplifier Board TDA7492 FIGURE 2 2 INPUT CONNECTION 1 T A S s Z TABLE 2 2 INPUT CONNECTION Connector Mark Channel Description h 11 Channel 2 Input Channel 1 Input GND GND ue Channel 2 Input Note You are allowed to feed only one group dual channel of audio signal to the amplifier board at a time Terminal Blocks Optional 2 3 Output Connections You can use either terminal blocks or banana connectors optional to output audio signal FIGURE 2 3 OUTPUT CONNECTION N is i p dr p Fa s I 5 AA AB32189 8 AA AB32174 8 AA AB34165 Ver1 0 Page 6 2004 2011 Sure Electronics Inc Hardware Detail TABLE 2 3 OUTPUT CONNECTION Connector Mark Negative Output of Channel 1 Positive Output of Channel 1 Negative Output of Channel 2 Positive Output of Channel 2 Output of Channe
4. age is 36V load impedance is 6 ohm and the gain is set at 37 6 dB The other circumstances can be referred to the input sensitivity from TABLE 3 1 ELECTRICAL CHARACTERISTICS FIGURE 2 5 VOLUME CONTROL mil CI CI T TI TABLE 2 8 DIP SWITCH SETTING SW2 2 6 Notes In order to protect amplifier board and extend its service lifetime please read the following warnings carefully since warranties will be voided if you do not observe the following warnings Warning 1 Quality related issues caused by potentiometers installed by buyers Warning 2 In order to achieve a better sound quality please use stable power supply since a bad or unstable power supply may worsen the sound quality or even cripple the amplifier board Warning 3 Never equip a pre amplifier to the audio input since the amplifier itself has powerful amplification ability and a high signal input will burn out the amplifier chip Warning 4 In order to protect amplifier and speaker please turn the volume output to the minimum when hooking up the amplifier and you may readjust the volume when you are sure that the amplifier is functioning properly AA AB32189 8 AA AB32174 amp AA AB34165 Ver1 0 Page 8 2004 2011 Sure Electronics Inc CLASS D AUDIO ANPLIFIER SURE BOARD TDA7492 electronics USER S GUIDE Chapter 3 Electrical Characteristics Following table lists all typical data of the Amp board For full s
5. l 1 Terminal blocks Note Never connect more than one group of speaker to the audio output Never connect CH1_OUT 2 OUT together since they belong to different NETs 3 Refer to on board descriptions for connection details 2 4 LED Indicators This amplifier has 1 power LED indicator which is marked as PWR D3 Power D3 will be illuminated in green when power up FIGURE 2 4 LED INDICATOR 2 5 Volume Control The on board external extensible interface allows for the connection of a rotary encoder board and a volume control board for volume control The two boards are not provided here but as another product product No AA AA11117 sold on Sure s webstore If you use the two boards please set K1 and K2 of the on board DIP switch SW1 OFF Not using these two boards you may also adjust the volume by setting the DIP switch SW1 The gain is factory pre set to low This can prevent chip from permanent damage caused by overheat when input signal amplitude is over range On the other conditions of gain setting it is recommended that the output signal amplitude is no larger than the power 2004 2011 Sure Electronics Inc AA AB32189 amp AA AB32174 amp AA AB34165 Ver1 0 Page 7 Class D Audio Amplifier Board TDA7492 supply voltage once the input signal reaches the peak Take AA AB32189 for example the maximum amplitude of the input signal is no more than 320mV RMS when power supply volt
6. p AA AB32174 amp AA AB34165_Ver1 0_ Page i Class D Audio Amplifier Board TDA7492 NOTES Product Version Ver 1 0 Document Version Ver 1 0 Z HN HB E E i B E EE AA AB32189 amp AA AB32174 8 AA AB34165 Ver1 0 Page ii 2004 2011 Sure Electronics Inc CLASS AUDIO AMPLIFIER SURE BOARD TDA7492 e electronics USER S GUIDE Chapter 1 Overview 1 1 Overview Welcome to use this 2 100W 2 50W 2 25W Class D audio amplifier board series by Sure Electronics TABLE 1 1 PRODUCT LIST Product No Rating Output Power Per Channel AA AB32189 100W 6 Ohm AA AB32174 SOW 6 Ohm AA AB34165 25W 6 Ohm They integrate ST s high performance TDA7492 supporting dual channel audio amplification Both of channels are capable of outputting nominal power simultaneously and continuously They integrate an external extensible interface to connect the matching product of a volume control board and a rotary encoder board for volume control suitable for amplifier enthusiasts or hobbyists to finish a complete amplifier system Resistance and capacity components of high quality including X7R ceramic capacitors and lower ESR electrolytic capacitors are used to gain the perfect timber finally realize high S N ratio low THD N wide frequency response range etc Briefly the power supply range and heat sink performance of each product distinguishes You may make the proper choice to meet your application needs FIGURE 1 1
7. pecification please refer to the data sheet of ST s TDA7492 chip TABLE 3 1 ELECTRICAL CHARACTERISTICS Supply Voltage AA AB32174 14V AA AB32165 ON STBY 90mA Disable FAN ON STBY 5OmA Quiescent Current Enable Powered by 19V FAN OFF STBY Disable FAN OFF STBY 10 mA Enable 25 608 25 608 1280mV Input Sensitivity 31 6dB EUM CAA AB32189 35 1dB 37 6dB 323mV 25 6dB 910mV Input Sensitivity 31 6dB 450mV AA AB32174 Input Sensitivity a Frequency Range 20Hz to 20KHz 3dB Both channels Efficiency output rating gt 90 power Input Impedance 48 60K ohm mE CNN GENE Operating Temperature 2004 2011 Sure Electronics Inc 2189 AA AB32174 8 AA AB34165 Ver1 0 9 Class D Audio Amplifier Board TDA7492 Thermal Shutdown Note 1 Stresses beyond the listed maximum power supply voltage may cause the permanent damage to components on board 2 The input sensitivity values are calculated on the basis of 6 Ohm load AA AB32189 amp AA AB32174 amp AA AB34165 Ver1 0 Page 10 2004 2011 Sure Electronics Inc CLASS D AUDIO AMPLIFIER o SURE BOARD TDA7492 ew electronics USER S GUIDE Chapter 4 Mechanical Drawing FIGURE 4 1 MECHANICAL DRAWING 4 BOinch 121 9mm 2 4 40inch T11 8mm 4 0 0 1 5 di 3 20inch 81 3mm 3 60inch 91 4mm 2004 2011 Sure Electronic
8. s Inc AA AB32189 8 AA AB32174 8 AA AB34165 Ver1 0 Page 11 JNI BOARD 7492 electronics USER S GUIDE Chapter 5 Contact Us CLASS D AUDIO AMPLIFIER o SURE e 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 86 25 68154891 832 Website www sure electronics com Email customerservice sure electronics com AA AB32189 amp AA AB32174 amp AA AB34165 Ver1 0 Page 12 2004 2011 Sure Electronics Inc
9. uick Start Suggested connection is shown in figure 1 3 FIGURE 1 3 CONNECTION SCHEMATIC AR J 2 NE 1 w eu DAA E P wm n Note 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 schematics 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 corresponding to that sound source 2004 2011 Sure Electronics Inc AA AB32189 amp AA AB32174 amp AA AB34165 Ver1 0 Page 3 Class D Audio Amplifier Board TDA7492 FIGURE 1 4 CASCADING SCHEMATIC OPTIONAL Soha poe m m secoca A Note GND should be grounded or connected to the housing of the device AA AB32189 8 AA AB32174 8 AA AB34165 Ver1 0 Page 4 2008 2011 Sure Electronics Ine CLASS AUDIO AMPLIFIER SURE BOARD TDA7492 e electronics USER S GUIDE Chapter 2 Hardware Detail 2 1 Power Connection To power the amplifier board use either jack J9 or terminal blocks J8 optional Pay attention to the polarity when connecting power supply FIGURE 2 1 POWER CONNECTION AI AZAR LA Z
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