1200670102

1200670102 application field and working principle

1200670102 is a highly integrated CMOS mono/stereo audio amplifier that can deliver up to 1.2 Watts of continuous-average power into 8 ohm speakers at 10 % THD with a 5.0V power supply. This amplifier has built-in advanced true bridge capabilities and thermal shutdown protection and is available in a 6-pin SOP package. This amplifier is furnished with short-circuit, under voltage lock out, and thermal protection, which against input and output over current. It provides an optimal solution for portable audio applications.

Application

This amplified claimed a few application, such as TV, CD player, multimedia speaker, and portable equipment. It can drive a bridge power load up to 1.2W per channel. It is capable of medium power audio applications with low distortion and low noise figure for portable and multimedia speaker systems. This amplifier can be used in wide supply voltage range of 5V to 13V and in low-voltage applications up to 3.3V. The power amplifier provides a smaller PCB area and low input quiescent current. It is easy to use and requires no additional external components.

Working Principle

1200670102 integrate two power stages, one for each channel, for both mono and stereo amplification. Each power stage includes two power transistors and two resistors. The power stage is configured to drive a bridge-tied load configuration. The amplifier circuit uses the series regulator technique with curve-controlled linear operation for stability. The amplifier is designed to provide full range of audio spectrum by allowing both single-ended and differential signals. It is capable of providing instantaneous response and smooth frequency response. Furthermore, this amplifier has low distortion and low noise figure and allows low-voltage operation.

The power stage controls the input signal with feedback loop that leads to the inputs of the two power transistors and their outputs. The input signals are balanced and centered on a reference voltage to minimize noise and distortion. This feature also helps to reduce the power dissipation through the amplifier circuit. The power transistors are modified to operate in high-voltage region to reduce DC offset and increase the audio power output. The output of the amplifier is filtered to minimize the harmonic distortion and provide natural sound. The output impedance of the amplifier is very low, which allows for improved output power supply rejection and stability.

Overall, the 1200670102 is a versatile and powerful integrated audio amplifier that provides a great solution for portable audio applications. It is a highly efficient design with built-in true bridge capabilities and thermal shutdown protection. Its wide supply voltage range, low-voltage operation, low distortion and noise figure, and low output impedance make it well suited for a wide variety of applications.