TPA6211A1DGNG4

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In the field of linear amplifiers, audio amplifiers are one of the most important components. The type TPA6211A1DGNG4 audio amplifier is designed for portable and battery-powered devices and has a wide range of applications. This article provides an overview of the device’s application fields, features, and its underlying working principle.

Applications

The TPA6211A1DGNG4 audio amplifier provides a maximum output power of 2.45 W into 4 Ω with 5.5 V supply. It is suitable for mobile and battery-powered devices that require a low-cost, small form-factor and low-power audio power amplifier. The built-in efficient Class-G functionality with automatic and dynamic switching between two supply voltages ensures optimal power and efficiency. The device’s operation is fully-differential, and it is optimized for mono or stereo operation, suitable for earpiece and loudspeaker applications. In addition, the device has a compact footprint of 2.9 mm x 2.9 mm, making it suitable for applications where PCB space is limited.

Features

The device features an integrated over-current and over-voltage protection, reducing the number of external components. It also features a patented, temperature-compensated DirectPath™ pop-and-click suppression circuitry, which provides pop and click suppression during power-up, power-down, and on-off transitions. The circuitry works by adjusting the pop and click levels according to the temperature and load conditions, reducing audible pops and clicks and improving the product’s acoustic performance. Additionally, the device has a high power-supply rejection ratio (PSRR) of 92 dB (A-weighted) and an SNR of 95 dB (A-weighted), making it suitable for mobile and noisy environments.

Working Principle

The TPA6211A1DGNG4 audio amplifier is based on Class-G power amplifier topology. The device implements a bridge-tied load (BTL) output configuration and is capable of delivering stereo output power. Thus, no output coupling capacitor is required, reducing external component count. The device is capable of driving any type of speakers and requires an external resistor and capacitor to set the gain. The two-stage amplifier architecture consists of a differential input voltage amplifier followed by a HiFi amplifier. The differential input voltage amplifier has two gain stages, each with two programmable gain settings. The gain can be adjusted with a single external resistor and the device can be operated in either bridge-tied load (BTL) or single-ended configuration. The second stage is a HiFi amplifier that provides the necessary gain for high-performance audio applications. The output stages determine the thermal operating temperature of the device, which is monitored via an embedded temperature sensor. The sensor is used to adjust the supply voltage to the output stages and ensures that the device operates safely and reliably.

Conclusion

The TPA6211A1DGNG4 is designed for portable and battery-powered devices and provides a range of features and benefits. It is suitable for mobile and noisy environments, which require low-cost, small form-factor and low-power audio amplifiers. The device offers high power-supply rejection ratio (PSRR) and SNR, as well as direct-path pop-and-click suppression. The device is based on Class-G power amplifier topology and uses a bridge-tied load (BTL) output configuration to reduce external component count. The device provides a high output power of 2.45 W into 4 Ω with 5.5 V supply. The device is suitable for earpiece and loudspeaker applications and is optimized for mono or stereo operation.

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