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.
TDA2003 Datasheet, TDA2003 PDF, TDA2003 Data sheet, TDA2003 manual, TDA2003 pdf, TDA2003, datenblatt, Electronics TDA2003, alldatasheet, free, datasheet, Datasheets. In fact the ST datasheet for the TDA2003 specifically says that the function of both the 220r and 2r2 resistors. And connected via reasonably thick PCB traces. Find the PCB design here. 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. The circuit uses cheap, readily available components and it is very easy to construct. TDA2003 is an integrated car radio amplifier from ST Micro electronics that has a lot of good features like short circuit protection for all pins, thermal over range low harmonic distortion, low cross over distortion etc. TDA2002/TDA2003 Mono Amplifier PCB 2 Only (Local) Home Theatre Subwoofer System LM324 PCB Only (Local) රු 85.00 Budusaranai LED PCB Only (Local) රු 275.00.
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
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.
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.
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.
Kerbal space program current version. 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
- C1: 4.7uF 25V
- C2: 470uF 25V
- C4,C7: 1,000uF 25V
- 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
New design by Mark
Mr. Make saids”…
I found that the gain section limits the amplifier from performing truly. So I used a 1k resistor with a 470uf capacitor to ground from pin 2. I didn’t place any feedback resistor and it works quite well.
I am proud of his parent. He will have a good career future.
Thanks for sharing!
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The TDA2003 is an Audio Amplifier IC from ST Microelectronics with a maximum output power of 10W commonly used in stereo amplification in car Radio. The IC can output a maximum current of 3.5A and features very low harmonic and crossover distortion.
Pin Name Gliffy online.
Non – Inverting Input
Non inverting end (+) of Amplifier
Inverting end (-) of Amplifier
Connect to the ground of the circuit
This pin outputs the amplified signal
Supply voltage, Minimum 6V and Maximum 36V
- Low-frequency class AB amplifier most suited for audio amplification
- Can provide up to 20 Watts as output power
- Operating Voltage: 8V to 18V
- Maximum output power 12V (at 1.6Ω RL)
- Voltage Gain: 80dB
- Supply Voltage rejection: 36dB
- Short circuit and thermal protection is available
- Breadboard friendly
- Available in 5-pin TO220 package
Note: Complete Technical Details can be found at the datasheet give at the end of this page.
Alternative to TDA2003: TDA2009
Other Audio Amplifiers: LM386, TDA1554, TDA2030, TDA7294, TDA7265, TDA7279, TDA2005
Introduction to TDA2003
TDA2003 is a general-purpose 10W amplifier IC that can be used in stereo or mono audio design circuits. The amplifier can output upto 3.5A current to drive speakers and can also handle high current upto 5A for shorter duration without any damage. It can also handle short circuits in both AC and DC rail without killing itself. It has an operating voltage of 18V but can handle high voltage up to 28V. This makes it robust to be used in automotive audio designs.
The TDA2030 is breadboard friendly and hence can be easily tested using a breadboard. A sample application circuit for TDA2030 is given below. The datasheet given at the bottom of this page consists of more details on this design.
TDA2003 is a 5-pin Amplifier IC. The pin 5 and 3 are used to power the Amplifier IC, and the audio signal to be amplified is given in through pin 1 which is the non-inverting input. The amplified audio output can be obtained through pin 4. The values of the components given above are the values recommended by manufactures. The two important components are the Cx and Rx which sets the bandwidth for the amplifier using the formulae shown above. Also the Resistors R1 and R2 are used doe setting the gain of the amplifier.
- Used for Audio signal Amplification
- Suitable for high power amplification
- Capable of operating on dual/split power supply
- Can be used to cascade audio speakers