TAS2552 Class-D Audio Power Amplifier

TI's 4 W Class-D mono audio amp with Class-G boost and speaker sense

Image of Texas Instruments' TAS2552 Class-D Audio Power AmplifierTexas Instruments' TAS2552 is a high-efficiency Class-D audio power amplifier with advanced battery current management and an integrated Class-G boost converter. The device constantly measures the current and voltage across the load and provides a digital stream of this information.

The Class-G boost converter generates the Class-D amplifier supply rail. During low Class-D output power, the boost improves efficiency by deactivating and connecting VBAT directly to the Class-D amplifier supply. When high-power audio is required, the boost quickly activates to provide significantly louder audio than a stand-alone amplifier connected directly to the battery.

The AGC automatically adjusts Class-D gain to reduce battery current at end-of-charge voltages, preventing output clipping, distortion, and early system shutdown. The fixed gain is adjustable via I²C. The gain range is –7 dB to +24 dB in 1 dB steps.

In addition to a differential mono analog input, the TAS2552 has built-in a 16-bit D/A converter used with a digital input. Moving the D/A converter from the digital host processor into the integrated amplifier process provides better dynamic performance at lower system cost. Additionally, since the PCB routing is digital rather than analog, sensitivity to external perturbations such as GSM frame-rate noise is decreased at the system level.

TAS2552 Class-D Audio Power Amplifier

ImageManufacturer Part NumberDescriptionTypeOutput TypeAvailable Quantity
TAS2552YFFR datasheet linkIC SPEAKER AMP CLASS D 30DSBGATAS2552YFFRIC SPEAKER AMP CLASS D 30DSBGAClass D, Class G1-Channel (Mono)3000 - Immediate
9000 - Factory Stock
TAS2552YFFR product page link

TAS2552 Evaluation Module

ImageManufacturer Part NumberDescriptionAmplifier TypeOutput TypeMax Output Power x Channels @ LoadAvailable Quantity
TAS2552EVM datasheet linkMOD EVAL AUDIO AMP 4W TAS2552TAS2552EVMMOD EVAL AUDIO AMP 4W TAS2552Class D2-Channel (Stereo)3.5W x 2 @ 8 Ohm0TAS2552EVM product page link
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Published: 2014-04-15