GUI for evaluation module (EVM)
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 7-V to 30-V Supply Voltage Operation
- Stereo (2 x BTL) and Mono (1 x PBTL) Operation
- Output Power at 10% THD+N
- 105-W Stereo into 4 Ω in BTL Configuration
- 112-W Stereo into 3 Ω in BTL Configuration
- 208-W Mono into 2 Ω in PBTL Configuration
- Output Power at 1% THD+N
- 88-W Stereo into 4 Ω in BTL Configuration
- 100-W Stereo into 3 Ω in BTL Configuration
- 170-W Mono into 2 Ω in PBTL Configuration
- 5-V Gate Drive or Built-in LDO for Optional Single-Supply Operation
- Closed-Loop Feedback Design
- Signal Bandwidth up to 100 kHz for High-Frequency Content From HD Sources
- 0.02% THD+N at 1 W into 4 Ω
- 60-dB PSRR (BTL, No Input Signal)
- <75-µV Output Noise (A-Weighted)
- >108-dB SNR (A-Weighted)
- AD or HEAD Modulation Schemes
- Low-Power Operating Modes
- Standby Modes: Mute and < 1 mA 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: 18 dB, 24 dB, 30 dB, 34 dB
- Integrated Protection: Undervoltage, Overvoltage, Cycle-by-cycle Current Limit, Short Circuit, Clipping Detection, Overtemperature Warning and Shutdown, and DC Speaker Protection
- 90% Efficient Class-D Operation (4 Ω)
- 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 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.
Technical documentation
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View all 8 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPA3221 100-W Stereo, 200-W Mono HD-Audio, Analog-Input, Class-D Amplifier datasheet (Rev. B) | PDF | HTML | 15 Dec 2017 |
| 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
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| HTSSOP (DDV) | 44 | View options |
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