Designing a 24W Power Amplifier Circuit using IC TDA1516

TDA1516 is Class B power amp in 13-pin SIL package.

It is good for many audio jobs.

It has safety features like short circuit, overheat and reverse polarity protection.

In BTL mode it gives 24W to 4 ohm speaker.

This Designing a 24W Power Amplifier Circuit using IC TDA1516 is great for car audio and other uses.

Circuit Working:

Parts List:

TDA1516 amp gives 24W power in BTL mode.

BTL setup boosts output by doubling voltage to speaker.

It uses 12V DC power supply to run the IC.

Capacitors help with filtering and smooth working.

Audio signal goes into pin 13 through capacitor C1.

C1 blocks DC and lets AC audio pass into amp.

Inside IC the signal is amplified by two amps in BTL.

One amp drives positive side and other drives negative (inverted) side.

This gives bigger voltage swing and more power.

Output goes to speaker through pin 5 positive and pin 9 negative.

Capacitor C2 across power lines blocks DC and passes AC signal.

Capacitor C3 near power pins keeps voltage steady and blocks noise.

These capacitors help avoid distortion.

Speaker is 4Ω load turns electric signal into sound.

Speaker works in BTL mode for max output.

Switch S1 turns amplifier ON or OFF.

TDA1516 has safety features like thermal shutdown and short circuit protection.

Formulas:

Output Power:

Power (P) to speaker:

P = (Vrms²) / RL

where,

• Vrms is the voltage across speaker
• RL is the speaker resistance in 4Ω

Gain:

Voltage gain (Av) is fixed in TDA1516 BTL mode.

From datasheet a typical gain = 20 dB

Av = 10^(20/20) = 10

Means output voltage is 10 times input voltage.

How to Build:

For Designing a 24W Power Amplifier Circuit using IC TDA1516 follow the below mentioned steps for connections:

• Gather all the parts as shown in circuit diagram
• Connect pin 1 to pin 4 of IC1 TDA1516.
• Connect pin 2 to pin 13 of IC1.
• Connect pin 3 and pin 7 to GND.
• Connect pin 5 to one side of 4Ω speaker and other side of speaker to pin 9.
• Connect pin 6, 8, 10 to +12V power.
• Connect pin 10 to one side of switch S1 and other side of switch to pin 11.
• Connect pin 13 to audio input using capacitor C1 and then to GND.
• Place capacitor C2 and C3 from +12V supply to GND.

Conclusion:

This Designing a 24W Power Amplifier Circuit using IC TDA1516 is good for car sound system.

Works with 12V supply and has safety features.

It is easy to use if we understand the circuit and do right calculations.

This circuit can be used in many audio projects.