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TPA3221
100-W stereo, 200-W mono, 7- to 32-V supply, analog input Class-D audio amplifier w/ low idle
Data sheet
TPA3221
- Wide 7V to 30V Supply Voltage Operation
- Stereo (2 x BTL) and mono (1 x PBTL) operation
- Output Power at 10% THD+N
- 105W Stereo into 4Ω in BTL Configuration
- 112W Stereo into 3Ω in BTL Configuration
- 208W Mono into 2Ω in PBTL Configuration
- Output Power at 1% THD+N
- 88W Stereo into 4Ω in BTL Configuration
- 100W Stereo into 3Ω in BTL Configuration
- 170W Mono into 2Ω in PBTL Configuration
- 5V Gate drive or built-in LDO for optional single-supply operation
- Closed-loop feedback design
- Signal Bandwidth up to 100kHz for High-Frequency Content From HD Sources
- 0.02% THD+N at 1W into 4Ω
- 60dB PSRR (BTL, No input signal)
- <75µV output noise (A-weighted)
- >108dB SNR (A-weighted)
- AD or HEAD modulation schemes
- Low-Power operating modes
- Standby modes: mute and < 1mA shutdown
- Low Idle-current HEAD modulation scheme
- Single-channel BTL operation
- Multiple input options to simplify pre-amp design
- Differential or single-ended analog inputs
- Selectable Gains: 18dB, 24dB, 30dB, 34dB
- Integrated Protection: Undervoltage, Cycle-by-cycle Current Limit, Short Circuit, Clipping Detection, Overtemperature Warning and Shutdown, and DC Speaker Protection
- 90% Efficient Class-D Operation (4Ω)
- Thermal pad located on package bottom
- Pin-compatible family of devices with voltage and power-level options
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 100kHz, 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 105W into 4Ω load or 1 x 208W into 2Ω load.
The TPA3221 features a single-ended or differential analog-input interface that supports up to 2VRMS with four selectable gains: 18dB, 24dB, 30dB and 34dB. The TPA3221 also achieves >90% efficiency, low idle power (<0.25W) and ultra-low standby power (<0.1W). This is made possible through the use of 70mΩ 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, cycle-by-cycle current limit, short circuit, clipping detection, overtemperature warning and shutdown, as well as DC speaker protection.
Technical documentation
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View all 8 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPA3221 100W Stereo, 200W Mono HD-Audio, Analog-Input, Class-D Amplifier datasheet (Rev. C) | PDF | HTML | 16 May 2025 |
| More literature | High-Power Audio Amplifiers TPA322x/4x/5x | 01 Dec 2017 | ||
| EVM User's guide | TPA3221 Evaluation Module User's Guide (Rev. B) | 03 Nov 2017 | ||
| Application brief | High Efficiency AD (HEAD) Modulation | 18 Oct 2017 | ||
| Application note | Multi-Device Configuration for TPA32xx Amplifiers | 27 Sep 2017 | ||
| Application note | Class-D Amplifier External Load Diagnostics | 23 Jan 2017 | ||
| Application note | LC Filter Design (Rev. A) | 09 Nov 2016 | ||
| Application note | TPA32xx Analog Input Grounding for Single Ended Inputs | PDF | HTML | 26 Aug 2016 |
Design & development
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Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (DDV) | 44 | Ultra Librarian |
Ordering & quality
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