Summary of 5W Stereo Audio Amplifier Project Based On BA5406
5W Stereo Audio Amplifier using BA5406 is a dual OTL monolithic power IC project for stereo radio, cassette players, and component systems. The BA5406 provides two built-in speaker amplifier circuits delivering up to 5W×2 at VCC=12V, RL=3Ω (2.8W×2 at 9V). It supports low-voltage operation down to 5V, includes a ripple filter/mute pin (pin 6), has 100 kΩ input resistance, and uses a small thermal-resistance package enabling simple heat-sink design. Recommended supply is 5–12 VDC.
Parts used in the 5W Stereo Audio Amplifier Project:
- BA5406 dual audio power amplifier IC
- Speaker pair (3 Ω rated)
- Power supply 5–12 V DC
- Input coupling capacitors
- Decoupling/ripple filter capacitor (for pin 6)
- Volume/input potentiometer
- Bypass and filter capacitors for power rails
- Resistors for input and biasing (as per typical application)
- Heat-sink or thermal mounting hardware
- PCB or perfboard and connecting wires
Description
5W Stereo Audio Amplifier project based on BA5406 IC which is suitable for application like stereo radio cassette player, stereo components systems etc.
The Heart of the project, BA5406 is a dual OTL monolithic power IC with two built-in, high output speaker amplifier circuits. High output of 5W×2 can be produced when VCC=12 V and RL=3Ω, and 2.8 W×2 when VCC=9V and RL=3Ω. The BA5406, which uses a high allowable power dissipation package, has a simple heat-sink design.
Specifications:
Good low voltage characteristics (Operation from Vcc=5 V)
Ripple filter (6pin) also can be used as muting pin (Make 6pin GND potential)
Small thermal resistance package and simple heat-sink design
Power supply 5 to 12 VDC
Output – 5 W + 5W, 3 Ω
Input resistance – 100 KΩ
For more detail:5W Stereo Audio Amplifier Project Based On BA5406
- What is the output power of the amplifier?
Up to 5 W + 5 W when VCC = 12 V and RL = 3 Ω; 2.8 W + 2.8 W at VCC = 9 V and RL = 3 Ω. - What IC is used as the heart of the project?
The BA5406 dual OTL monolithic power amplifier IC is used. - What supply voltage does the project require?
Power supply range is 5 to 12 V DC. - Can the amplifier operate at low voltage?
Yes, it has good low voltage characteristics and can operate from VCC = 5 V. - What is the input resistance of the amplifier?
The input resistance is 100 kΩ. - What is the function of pin 6 on the BA5406?
Pin 6 is a ripple filter and can also be used as a muting pin by making pin 6 GND potential. - What speaker load is specified for full output?
A 3 Ω speaker load is specified for the rated outputs. - Does the BA5406 require a heat-sink?
It uses a small thermal resistance package and allows a simple heat-sink design; a heat-sink is recommended for proper dissipation.
