TPA3221 is a high-power Class-D amplifier that enables efficient operation at full-power, idle and standby. The device features closed-loop feedback with a bandwidth up to 100 kHz, which provides low distortion across the audio band and delivers excellent sound quality. The device operates with either AD or low idle-current HEAD (High Efficient AD mode) modulation, and can drive up to 2 x 105 W into 4-Ω load or 1 x 208 W into 2-Ω load.
The TPA3221 features a single-ended or differential analog-input interface that supports up to 2 VRMS with four selectable gains: 18 dB, 24 dB, 30 dB and 34 dB. The TPA3221 also achieves >90% efficiency, low idle power (<0.25 W) and ultra-low standby power (<0.1 W). This is made possible through the use of 70-mΩ MOSFETs, an optimized gate drive scheme and low-power operating modes. TPA3221 includes a built-in LDO for easy integration in single-power-supply systems. To further simplify the design, the device integrates essential protection features including undervoltage, overvoltage, cycle-by-cycle current limit, short circuit, clipping detection, overtemperature warning and shutdown, as well as DC speaker protection.
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|Audio Input Type|
|Speaker Channels (Max)|
|Power Stage Supply (Min) (V)|
|Power Stage Supply (Max) (V)|
|Output Power (W)|
|Load (Min) (ohms)|
|THD + N @ 1 kHz (%)|
|Iq (Typ) (mA)|
|Analog Supply (V) (Min)|
|Analog Supply (V) (Max)|
|Power to Parallel Bridge Tied Load (Max) (W)|
|Operating Temperature Range (C)|
|Analog Input||Analog Input||Analog Input||Analog Input||Analog Input||Analog Input||Analog Input||Analog Input|