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.
All trademarks are the property of their respective owners.
|Part number||Order||Audio input type||Architecture||Speaker channels (Max)||Power stage supply (Min) (V)||Power stage supply (Max) (V)||Output power (W)||Load (Min) (ohms)||SNR (dB)||THD + N @ 1 kHz (%)||Iq (Typ) (mA)||Control interface||Closed/open loop||Analog supply (Min) (V)||Analog supply (Max) (V)||Power to parallel bridge tied load (Max) (W)||PSRR (dB)||Operating temperature range (C)||Rating|
||Analog Input||Class-D||Stereo||7||30||100||1||108||0.02||15||Hardware||Closed||5||30||200||60||-40 to 85||Catalog|
||Analog Input||Class-D||Stereo||4.5||26||50||4||102||0.1||20||Hardware||Closed||4.5||26||100||70||-40 to 85||Catalog|
||Analog Input||Class-D||Stereo||4.5||26||50||4||102||0.02||23||Hardware||Closed||4.5||26||100||70||-40 to 85||Catalog|
||Analog Input||Class-D||Stereo||4.5||26||70||2||102||0.1||17||Hardware||Closed||4.5||26||100||70||-40 to 85||Catalog|