Texas Instruments has introduced a 3,2 W per channel stereo Class D amplifier and a 3 W, mono Class D amplifier, both with fast gain ramp ‘SmartGain’ automatic gain control (AGC) and programmable dynamic range compression (DRC). To achieve louder volume from the speaker without increasing the peak voltage, the TPA2028D1 and TPA2026D2 incorporate DRC to boost soft volumes automatically, allowing designers to compress the dynamic range of the audio to match the dynamic range of the speaker. The TPA2028D1 drives 3 W/channel into 4 Ω at 5 V while the TPA2026D2 drives 3,2 W/channel into 4 Ω at 5 V. The programmable SmartGain DRC with selectable compression ratios for up to 30 dB gain enhances loudness without increasing the peak voltage.
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