2 x 12 W HI-FI AUDIO AMPLIFIER

Description: The TDA2616 is a hi-fi stereo amplifier designed for mains fed applications, such as stereo radio and TV. The circuit is optimally designed for symmetrical power supplies, but is also well-suited to asymmetrical power supply systems. An output power of 2 X 12 W (THD = 0.5%) can be delivered into an 8 Ω load with a symmetrical power supply of ±16 V. The gain is internally fixed at 30 dB, thus offering a low gain spread and a very good gain balance between the two amplifiers (0.2 dB). More: A special feature is the input mute circuit. This circuit disconnects the non-inverting inputs when the supply voltage drops below ±6 V, while the amplifier still retains its DC operating adjustment. The circuit features suppression of unwanted signals at the inputs, during switch-on and switch-off. The mute circuit can also be activated via pin 2. When a current of 300 mA is present at pin 2, the circuit is in the mute condition. The device is provided with two thermal protection circuits. One circuit measures the average temperature of the crystal and the other measures the momentary temperature of the power transistors. These control circuits attack at temperatures in excess of +150 °C, so a crystal operating temperature of max. +150 °C can be used without extra distortion.

The TDA2616 is a high-fidelity stereo amplifier integrated circuit specifically engineered for mains-powered applications, including stereo radios and televisions. The design accommodates both symmetrical and asymmetrical power supply configurations, enhancing its versatility in various electronic systems. The amplifier is capable of delivering an output power of 2 x 12 watts into an 8 Ω load when supplied with a symmetrical voltage of ±16 V, with a total harmonic distortion (THD) of 0.5%.

The internal gain of the amplifier is fixed at 30 dB, which ensures minimal gain variation and excellent gain matching between the two channels, with a deviation of only 0.2 dB. This precision in gain control contributes to the overall audio quality, making the TDA2616 suitable for high-performance audio applications.

A notable feature of the TDA2616 is its input mute circuit. This circuit is designed to disconnect the non-inverting inputs when the supply voltage falls below ±6 V, thereby preserving the DC operating point of the amplifier. This functionality is crucial in preventing unwanted signal interference during power transitions, such as switch-on and switch-off events. Additionally, the mute circuit can be externally controlled through pin 2; if a current of 300 mA is detected at this pin, the amplifier will enter mute mode.

Thermal management is critical in audio amplifiers, and the TDA2616 incorporates two thermal protection circuits. One circuit monitors the average temperature of the crystal, while the other assesses the instantaneous temperature of the power transistors. These protection mechanisms are triggered when temperatures exceed +150 °C, allowing the amplifier to operate safely at high temperatures without introducing additional distortion. This design consideration ensures reliability and longevity in demanding audio applications.The TDA2616 is a hi-fi stereo amplifier designed for mains fed applications, such as stereo radio and TV. The circuit is optimally designed for symmetrical power supplies, but is also well-suited to asymmetrical power supply systems.

An output power of 2 X 12 W (THD = 0.5%) can be delivered into an 8 Wload with a symmetrical power supply of ±16 V. The gain is internally fixed at 30 dB, thus offering a low gain spread and a very good gain balance between the two amplifiers (0.2 dB).

A special feature is the input mute circuit. This circuit disconnects the non-inverting inputs when the supply voltage drops below ±6 V, while the amplifier still retains its DC operating adjustment. The circuit features suppression of unwanted signals at the inputs, during switch-on and switch-off. The mute circuit can also be activated via pin 2. When a current of 300 mA is present at pin 2, the circuit is in the mute condition. The device is provided with two thermal protection circuits. One circuit measures the average temperature of the crystal and the other measures the momentary temperature of the power transistors.

These control circuits attack at temperatures in excess of +150 °C, so a crystal operating temperature of max. +150 °C can be used without extra distortion.