TS4985EIJT Integrated Circuits (ICs)

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Class AB
Output Type:	2-Channel (Stereo)
Max Output Power x Channels @ Load:	1.2W x 2 @ 8 Ohm
Voltage - Supply:	2.2 V ~ 5.5 V
Features:	Depop, Differential Inputs, Standby, Thermal Protection
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Supplier Device Package:	15-FlipChip
Package / Case:	15-UFBGA, FCBGA
Base Part Number:	TS4985

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TS4985EIJT Linear Audio Amplifiers

Linear audio amplifiers are important components in consumer electronics, from home theaters to walkman radios. The TS4985EIJT is an integrated audio amplifier product from ST Microelectronics, specifically designed for consumer entertainment applications. It is a low power, high efficiency class-D amplifier with a maximum output power of 2 W and a frequency range of 20 Hz to 20 kHz. The TS4985EIJT can be used in both mono and stereo systems, providing excellent sound quality with a very low harmonic distortion of 0.05%.

Applications of the TS4985EIJT

The TS4985EIJT is designed for consumer audio applications including Hi-Fi systems, portable digital media players, and portable speakers. It is especially suitable for applications requiring low power audio amplification. The TS4985EIJT provides up to 2 W of output power, making it an excellent choice for applications such as providing audio output to headphones, speaker systems and sound bars. It is also suitable for applications using the latest generation of digital sound cards. Its advanced process technology and high efficiency allow for a low total harmonic distortion, making the TS4985EIJT an ideal choice for applications requiring a high-quality, low cost, audio amplifier with excellent sound quality and low power consumption.

Distortion-Compensated Volume Control and Error Amp

The TS4985EIJT offers a unique distortion-compensated volume control and error amplifier circuit. This circuit eliminates the need for a separate vocal preamp and allows for precise volume control. The integrated error amplifier can provide the necessary feedback control to maintain a low distortion, high fidelity audio signal.The integrated volume control also offers an automatic mute feature. This feature prevents the user from overdriving the amplifier and damaging the speakers. The mute feature is triggered when the volume is set too high, and allows the user to reduce the volume before the amplifier creates too much distortion.

Efficient Power Management

The TS4985EIJT amplifier is designed for very low power consumption and high efficiency. The amplifier can operate from a wide range of traditional and low voltage power sources, including single and dual power supplies, and allows the user to adjust the supply voltage to be compatible with the respective device. The amplifier also supports thermal protection, allowing it to enter a safe mode if the temperature exceeds an unsafe level.

Working Principle of the TS4985EIJT

The TS4985EIJT is a class-D audio amplifier, meaning it converts an audio signal into an amplified direct current (DC) signal. This is accomplished by using an oscillating circuit, or switching circuit, to rapidly switch the output current on and off. This creates a series of pulses, each pulse representing a single audio frequency. These pulses are carried through a set of low-noise, low-resistivity transistors that amplify the signal, generating power for the load.The amplitude and frequency of the pulses depend on the audio signal, meaning that the amplitude and frequency of the output signal can be adjusted to create the desired sound. The efficiency of the amplifier is determined by the oversampling rate of the oscillator and the power supply voltage.The efficiency of the TS4985EIJT is further improved by its advanced integration techniques. The amplifier circuit is designed to reduce the number of components needed, meaning that the same amount of power is achieved with fewer active components. This reduces the power consumption, making it an excellent choice for low-power designs.

Conclusion

The TS4985EIJT Linear Audio amplifier from ST Microelectronics is a low power, high efficiency class-D amplifier. It is designed for applications requiring up to 2 W of output power and a frequency range of 20 Hz to 20 kHz. Its advanced process technology and high efficiency allow for a low total harmonic distortion, making it an ideal choice for applications requiring high-quality audio. The amplifier\'s distortion-compensated volume control and error amplifier circuit eliminates the need for a separate vocal preamp and allows for precise volume control. The amplifier is also designed for low power consumption and high efficiency, making it a great choice for portable and low-power applications.

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