10W CAR RADIO AUDIO AMPLIFIER, TDA2003 datasheet, TDA2003 circuit, TDA2003 data sheet: STMICROELECTRONICS, alldatasheet, datasheet, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes, triacs, and other semiconductors. Jan 17, 2020 Below that builds with the integrated circuit, PCB layout and no need for any customization. Parts used in this circuit are easily available in most of the local markets. TDA2050 datasheet The TDA2050 is class AB audio amplifier. Its high power capability the TDA2050 is able to provide up to 35W true rms power into speaker 4 ohm load at THD =10. Jun 26, 2020 Using the wrong resistor values causes the obsolete TDA2003 amplifier to oscillate at a very high frequency and get very hot. Other problems: Remove your 100k resistor at pin 1. The capacitor at pin 1 should be 10uF. The 39nF capacitor and 39 ohm resistor are missing. Your 470uF capacitor should be at least 1000uF. The speaker is supposed to be.
Tda2003 Pcb Wizard
Build a stereo audio amplifier with TDA2003. Find the PCB design here.
Recommended Experience: lower intermediate, knowledge of amplifiers, PCB etching, heatsink attaching, and (optional) mains qualification TDA2003 application Quick facts TDA2003 / TDA2003A. Power output: 6W into 4 ohms at 10% 1kHz distortion with power supply 14.4V; Power output: 10W into 2 ohms at 10% 1kHz distortion with power supply 14.4V. Apr 14, 2017 PCB Layout & EDA TDA2003 Altium Home. Hardware Design. PCB Layout & EDA. TDA2003 Altium. Thread starter Altair5; Start date Dec 20, 2015; Search Forums; New Posts; A. Thread Starter. Joined Dec 20, 2015 6. Dec 20, 2015 #1 Hi, I'm looking for the schematics of the TDA2003. I use Altium 15.
TDA2003 is an integrated audio amplifier circuit capable of providing up to 10 W into 2 ohms load and 6 W into 4 ohms load when powered at 14.4 V. It is very easy to build a reliable circuit with it because it has short circuit protection. It will withstand a permanent short circuit on the output as long as supply voltage doesn't exceed 16 V. The maximum operating DC voltage is 18 V, however TDA2003 will not get damaged as long as supply voltage is less than 28 V. It comes with integrated thermal limiting circuit.
Having these features, the TDA2003 proves to be a good option for small power amplifiers. It was designed for car audio, that's why it is powered from single supply of about 12 V. Although nowadays it is considered obsolete, there are plenty of electronic parts suppliers which have TDA2003 in stock. At very low prices, by the way. Using the datasheet as source of inspiration, I designed my own PCB for two TDA2003 circuits, to make a stereo amplifier.
The TDA2003 amplifier on homemade PCB without heatsink
The schematic is the recommended one from datasheet, drawn twice for two channels.
TDA2003 stereo amplifier schematic
I designed the PCB in KiCad as a single board of 35 by 85 millimeters that holds both channels. A three pin header is used as audio input and screw terminals are present at supply voltage port and audio output ports.
TDA2003 stereo amplifier PCB outline
With the screw terminals facing towards you, the speaker outputs have ground on the left and signal output on the right. The power input has VCC at left and ground at right. These polarities are not marked on silkscreen, but are easy to spot if you look at the tracks.
Recommended parts values
Component values are not critical as you can see in the above table adapted from datasheet (Gv is voltage gain and B is frequency). I used 25 V capacitors for power supply filtering and output coupling (the 100 uF and 1000 uF ones). It's okay to use 16 V capacitors if you'll be powering this circuit from a stabilized 12 V supply. For the non polarized, small capacitors, I prefer to use film type instead of ceramic type. The latter have some disadvantages in audio circuits.
To get a decent ouput, TDA2003 must be mounted on a heatsink. It can be a common one and there is no need to isolate IC packages electrically. Spacing between ICs is 49.5 millimeters.
When building this PCB, don't forget the wire that brings supply voltage to the TDA2003 of right channel. The wire connection points are actually vias in KiCad. That's no problem if you build the PCB at home, but if you send the files to get it manufactured, you might want to change those vias for regular pads that are not covered by solder mask.
The input audio signal should be maximum 0.85 Vp-p (0.3 Vrms). You can connect standard line out by using a resistor and a potentiometer as voltage divider. Or you can add an input preamplifier or tone correction circuit. If using such additional devices, avoid ground loops (in audio circuits, grounds from all modules connect to a single point and there's a single ground wire for each module).
Downloads
- KiCad PCB project and schematic
- TDA2003 datasheet at STMicroelectronics
See, this is a TDA2003 amplifier circuit, popular IC from SGS Thomson.
Why we should use this? It is the normal operation of the integrated circuit, the music amplifier for car audio radio sound.
Which uses a supply voltage from a 12V car battery. But this circuit is adapted for use in a home. With changing the power supply voltage to 18V.
So, this IC can easily deliver 10W to a 4Ω load speaker.
Read also: TDA2004 – TDA2005 subwoofer Bridge Amplifier circuit diagram
2)TDA2003 Pinout and symbol
3)How TDA2003 circuit works
Datasheet in short
Look at TDA2003 looks like TDA2030.
Cre photo: Exiron
TDA2003 Pinout and symbol
Then, see its Circuit connection or symbol below.
We will see that it looks like TDA2030.
The maximum output power and relationship
Do you want to know the output power of this chip? If, Yes look at the graph below.
It shows the relationship between power out and applied voltage.
We will notice how the 8 watts only applies to a 4 ohms speaker. And, results when the applied voltage (VS) is about 18V.
Tda2003 Pcb Beach
We can use load is 1.6 ohms to 4 ohms speaker impedances.
Then, if we change load is an 8 ohms speaker, the power is practically halved.
This feature is a good side, right? It means that you can parallel:
- Two 8-ohm speakers
- Four 8-ohm speakers
- Two 4 ohms speaker.
They still get the same power. Or loudness emerging from each speaker.
We may place four 8 ohm speakers in parallel to output.
The volume is quite sufficient for the people in the assembly room and the volume control was only about half.
The clarity and bass response was exceptional. The figure distortion up to 5 watts is 0.2%.
In the datasheet, If you use 14.4V of VS.
In fact, the amplifier has very good figures up to 8 watts with a 2 ohms speaker and 6 watts with a 4-ohm speaker.
Once these limits are reached, the distortion level increases rapidly to 10%.
And at this level, the average person can noticeably hear that something is wrong.
How TDA2003 circuit works
See in the circuit below we will learn how it works. The output power is more than about 10 watts RMS.
And the TDA2003 can protect from damage and short circuits. When the load over.
And, Maximum Voltage of 28 volts. At the frequency response 40 Hz to 15 kHz.
The external components required for the power amplifier are either for feedback, decoupling or high-frequency suppression.
The amplifier itself is of a highly stable design with an enormous open-loop gain.
What is more? Let’s learn.
Here is step by step a process in each component.
Input capacitor
C1: The 4.7 uF electrolytic at the input. It is designed to AC couple the amplifier to a source such as a tuner or any audio signal.
The C1- 4.7 mfd input capacitor allows the circuit to operate without and DC shift occurring.
We may add the volume control to the input. And must be placed before the capacitor.
The power filter capacitor
See at the power rail has a C7: 1,000uF electrolytic and C6: 0.1uF capacitor across it.
The C7 is a storage capacitor for supplying high currents during peak passages. And, it also reduces the power supply ripple.
The C6 capacitor is quite important. It can prevent a form of oscillation from occurring at risky power supply impedance levels.
Frequency Cut-off
The C3: 0.039uF and R1: 39 ohms resistor form the negative feedback network.
The value of C is designed to set the upper-frequency cut-off.
The value of C is designed to set the upper-frequency cut-off.
And a larger value of C3 will reduce the maximum frequency.
The R1 also sets the high frequency cut off point and if reduced in value, oscillation may occur.
The gain setting
The actual gain of the amplifier is set by the ratio of the 220-ohm resistor and 2.2-ohm resistor.
If you like the TDA2003. And want to try it. See:
Read next: TDA2009 Amplifier stereo 10W | High Bridge 28 watts
Parts you will need
- IC1: TDA2003, 10-watt audio amplifier IC
Electrolytic Capacitor - C1: 4.7uF 25V
- C2: 470uF 25V
- C4,C7: 1,000uF 25V
Ceramic Capacitor - C3: 0.039uF 50V
- C5, C6: 0.1uF 50V
0.5W Resistors, tolerance: 5% - 39 ohms
- 220 ohms
- 2.2 ohms
- 1 ohm
- SP1: 2 ohms to 8 ohms Speaker
When entering the power supply 15 volts to the circuit. The C1 coupling audio signal through the VR1 to adjust the volume. Then sent to the C2 anti-noise DC input signal to pin 1 of IC. The non-inverting amplifier circuit is a non-return phase. This is the signal output pin 4, by a C5 enhances the stability of low-frequency response the better. And the noise will be dropped down to the ground by R4 and C6 before outputting to speakers. Another part of the output signal, which is fed back through C3, and R1, to enter the pin 2 inverting. To maintain a constant frequency response at-3dB. And if you want to add. The frequency response is to reduce the C3. The C8 is a filter file before the operation.C7 cut out noise from the supply. If you want a stereo amplifier,Is to create an additional set.
Read others: Thanks Credit: 8-watt amplifier using TDA2002 on Talking Electronics No.9
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