Overview
The TPA3121D2PWPG4, produced by Texas Instruments, is a 15-W stereo Class-D audio power amplifier designed for efficient and high-quality audio output. This device operates from a supply voltage range of 10 V to 26 V and is suitable for driving stereo speakers in single-ended or bridge-tied-load (BTL) configurations. It features a high efficiency class-D operation, eliminating the need for external heat sinks in most applications. The amplifier includes internal oscillators, selectable fixed-gain settings, and integrated protection features such as thermal and short-circuit protection with auto recovery.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 10 to 26 | V |
| Output Power (Stereo, 1% THD+N) | 15 W per channel into 4 Ω | W |
| Output Power (Mono, 1% THD+N) | 30 W into 8 Ω | W |
| Gain Settings | 20, 26, 32, 36 dB | dB |
| Analog Input Voltage | -0.3 to 7 V | V |
| Operating Free-Air Temperature | -40 to 85 °C | °C |
| Junction Temperature | -40 to 150 °C | °C |
| Quiescent Supply Current | 16 to 30 mA | mA |
| Drain-Source On-State Resistance | 450 mΩ | mΩ |
| Oscillator Frequency | 250 to 350 kHz | kHz |
Key Features
- High efficiency class-D operation, eliminating the need for external heat sinks.
- Internal oscillator to set class-D frequency without external components.
- Four selectable, fixed-gain settings: 20, 26, 32, and 36 dB.
- Single-ended analog inputs.
- Thermal and short-circuit protection with auto recovery.
- Advanced power-off pop reduction.
- Space-saving surface mount 24-pin TSSOP package.
- Integrated protection features including undervoltage, overvoltage, cycle-by-cycle current limit, and overtemperature warning.
Applications
- Flat Panel Display TVs.
- DLP® TVs.
- CRT TVs.
- Powered Speakers.
- Home Audio Systems.
- Automotive Audio Systems.
Q & A
- What is the supply voltage range of the TPA3121D2PWPG4?
The supply voltage range is from 10 V to 26 V. - What are the output power capabilities of the TPA3121D2PWPG4?
The device can deliver up to 15 W per channel into a 4-Ω load in stereo configuration and up to 30 W into an 8-Ω load in mono configuration. - What are the gain settings available on the TPA3121D2PWPG4?
The gain settings are 20, 26, 32, and 36 dB. - Does the TPA3121D2PWPG4 require an external heat sink?
No, the high efficiency class-D operation typically eliminates the need for an external heat sink. - What protection features are integrated into the TPA3121D2PWPG4?
The device includes thermal and short-circuit protection with auto recovery, undervoltage, overvoltage, cycle-by-cycle current limit, and overtemperature warning. - What is the operating temperature range of the TPA3121D2PWPG4?
The operating free-air temperature range is from -40 °C to 85 °C. - What is the package type of the TPA3121D2PWPG4?
The device is packaged in a 24-pin TSSOP surface mount package. - How does the TPA3121D2PWPG4 reduce pop noise?
The device features advanced power-off pop reduction and patented start-up and shutdown sequences to minimize pop noise. - What is the typical quiescent supply current of the TPA3121D2PWPG4?
The typical quiescent supply current is 16 to 30 mA. - What is the oscillator frequency range of the TPA3121D2PWPG4?
The oscillator frequency range is from 250 kHz to 350 kHz.
