TPA3101D2PHPG4

TPA3101D2PHPG4 Application Field and Working Principle

The Texas Instruments TPA3101D2PHPG4 is a low-power, monolithic H Bridge amplifier integrated circuit (IC). It is ideal for applications where power amplifiers are required to bridge the power supply between two devices, such as audio amplifiers, motor-driven motors, and instrumentation bridging. The TPA3101D2PHPG4 is an integrated H bridge audio amplifier as compared to TPA3101 LP/HPA series.

Application Field of TPA3101D2PHPG4

The TPA3101D2PHPG4 is a new integrated audio amplifier and is widely used in audio applications. It is a bi-directional H bridge amplifier, hence can be used to drive polarized loads including speakers, DC motors or valves. The audio range includes 8-ohm to 4-ohm stereo speakers as well as 4-ohm to 2-ohm subwoofers. Apart from this, the TPA3101D2PHPG4 IC can also be used in instrumentation, bridging power supply and motor-driven motors.

TPA3101D2PHPG4 Working Principle

The TPA3101D2PHPG4 relies on two power supply inputs, a 5V and 15V, which need to be connected to the corresponding pins on the IC. The input signals are supplied to the IC via the PRE and IN pins. The 16V power supply (VCC) is connected to the OUT pin and the ground is connected to the GND pin. The output signal is taken from the OUT pin and is amplified by the IC. The frequency response of this amplifier IC is also fairly flat, with a range of 30Hz - 20kHz.

The TPA3101D2PHPG4 includes an ARM-based control circuitry that read input signals and adjusts the output accordingly. The internal fine tuning of the IC is achieved with the help of a transconductance amplifier, a boost converter and a differential amplifier. The transconductance amplifier is responsible for analysing and fine-tuning the output signal, while the boost converter helps to raise the voltage level of the output signal. The differential amplifier triggers the output transistors of the H bridge and produces the amplified output signal.

Additional Features

The TPA3101D2PHPG4 includes several additional features, such as short-circuit protection, thermal shutdown and under-voltage lockout. The short-circuit protection feature prevents harmful currents from flowing through the IC, while the thermal shutdown feature ensures that the IC does not overheat and that no damage occurs due to excessive temperature. The under-voltage lockout ensures that the IC does not draw too much power from the supply lines and no damage occurs due to low voltage.

Conclusion

The TPA3101D2PHPG4 is an excellent choice for powering audio amplifiers, motor-driven motors and instrumentation bridging. This IC uses two power supply inputs, a 5V and 15V, and allows for a wide variety of input and output configurations. Additionally, the IC includes several additional features, such as short-circuit protection, thermal shutdown and under-voltage lockout, which further enhance its reliability. The internal circuitry of the device is very finely tuned, allowing for excellent frequency response and output levels.