Summary of 5.5W – 2 Channel Audio Amplifier
This article describes a compact 2-channel audio amplifier based on the Sanyo LA4445 integrated circuit. It delivers 5.5 watts per channel into a 4-ohm load using a 12V DC power supply. Key features include minimal external components, low pop noise during power transitions, good ripple rejection, and built-in thermal and overvoltage protection. The unit offers a voltage gain of 50dB with an input impedance of 30k ohms.
Parts used in the 2 Channel Audio Amplifier:
- Sanyo LA4445 IC
- 12V DC Power Supply
- 4 Ohm Speakers
Description
The small 2 Channel amplifier constructed around Sanyos LA4445 IC delivers 5.5Watts +5.5 Watts at 4 ohm load, supply in 12V DC 2Amp, Input impedance 30K.
Specifications
- Dual Channels output : 5.5W
- Minimum External Parts
- Very small pop noise at the time of power supply ON/OFF
- Good ripple rejections
- Small residual noise
- Built-in protectors 1. Thermal Protector 2. Overvoltage Surge Protector
- Standard Audio signal
- Supply 12V DC
- Load : 4 Ohms Speaker on Each Channel
- Voltage Gain : 50DB
- Output 5.5W on each Channel (THD 10%)
- Total harmonic distortion 1% Max @ Po=1W
- Input impedance 30 K-ohms
For More Details: 5.5W – 2 Channel Audio Amplifier
- How much power does this amplifier deliver?
It delivers 5.5 Watts plus 5.5 Watts at a 4 ohm load. - What is the required supply voltage for this project?
The supply requires 12V DC 2Amp. - Does the amplifier have built-in protection features?
Yes, it includes a Thermal Protector and an Overvoltage Surge Protector. - What is the input impedance of the amplifier?
The input impedance is 30 K-ohms. - How many channels does this amplifier support?
It is a dual channel output amplifier. - What is the voltage gain of the device?
The voltage gain is 50DB. - Is there significant pop noise when turning the power on or off?
No, it produces very small pop noise at the time of power supply ON/OFF. - What is the maximum total harmonic distortion specified?
The total harmonic distortion is 1% Max @ Po=1W.
