2X15 Watt stereo amplifier using TDA4935

Description: The TDA4935 is a bipolar stereo amplifier integrated circuit (IC) that can be configured as either a 2x15W stereo amplifier or a 30W mono BTL (Bridge-Tied Load) amplifier. This IC includes built-in circuitry for overload protection and over-temperature shutdown. In this configuration, the IC is set up in stereo mode to deliver 15W of power to each speaker. The circuit operates without the need for a dual power supply and can be powered by a voltage range of 8V to 24V. For maximum output power, a 24V supply is utilized. According to the manufacturer's datasheet, at 20V DC, the output will be 11 watts into a 4-ohm load, achieving an efficiency of 70%. Therefore, the power input required for the chip is approximately 16 watts, which translates to a current draw of 800mA for both channels combined, resulting in a total of 1.6A. A transformer rated at 20V and 2A is recommended for optimal performance.

The TDA4935 amplifier IC is designed for efficient audio amplification in various applications, including home audio systems and portable devices. The device's ability to operate in both stereo and mono configurations allows for versatile use cases, depending on the user's requirements. In stereo mode, the amplifier provides 15W output per channel, suitable for driving standard speakers in a typical listening environment. The BTL configuration maximizes power output, making it ideal for situations where space is limited, and higher power is needed.

The built-in overload protection and over-temperature shutdown features are critical for ensuring the longevity and reliability of the amplifier. These safety mechanisms prevent damage to the IC and connected components during prolonged operation or under heavy load conditions. The flexibility of the power supply requirements, ranging from 8V to 24V, allows for easy integration into various power supply designs, making the TDA4935 suitable for both battery-operated and mains-powered applications.

When designing the circuit, it is essential to consider the output load impedance. The TDA4935 is optimized for 4-ohm speakers, which is a common impedance for many consumer audio devices. The efficiency rating of 70% indicates that a significant portion of the input power is converted to useful audio output, minimizing wasted energy as heat.

For power supply design, a transformer rated at 20V and 2A is recommended to provide sufficient headroom for the amplifier's operation. This specification ensures that the amplifier can deliver its rated output without distortion or clipping under typical load conditions. Additionally, proper filtering and decoupling capacitors should be included in the power supply circuit to maintain stable voltage levels and reduce noise, further enhancing audio quality.

Overall, the TDA4935 amplifier IC presents a robust solution for audio amplification, combining power, efficiency, and protection features in a single package.TDA4935 is bipolar stereo amplifier IC that can be wired as a 2X15W stereo amplifier or a 30W mono BTL amplifier. The IC also features built in circuitry for over load protection and over temperature shut down. Here the IC is wired in stereo mode in order to deliver 15W power on each speaker. The circuit does not require a dual power supply and it can be powered from anything between 8 to 24V. Here I am using 24V for getting maximum output power. Hi Sicko With 20 volt DC the output will be 11watts into 4 ohms as per mfg datasheet, at an efficiency of 70%. Hence the power input required for the chip is around 16watts 16/20 is 800mA both channel put together 1.

6Amps. with head room 20volt 2amp transformer is the best choice.