Overview
The TPA3121D2 is a highly efficient, 15-W (per channel) class-D audio power amplifier designed by Texas Instruments. This amplifier is capable of driving stereo speakers in a single-ended configuration or a mono speaker in a bridge-tied-load configuration. It operates within a supply voltage range of 10 V to 26 V, making it versatile for various applications. The TPA3121D2 is notable for its efficient class-D operation, which eliminates the need for external heat sinks, and its advanced power-off pop reduction, minimizing noise during startup and shutdown sequences.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 10 to 26 | V |
| Operating Temperature Range | -40 to 85 | °C |
| Package Type | HTSSOP (PWP) | |
| Pins | 24 | |
| Output Power (Stereo, 4 Ω Load) | 15 W/Ch | |
| Output Power (Mono, 8 Ω Load) | 30 W/Ch | |
| Gain Settings | 20, 26, 32, 36 dB | |
| Load Resistance (Minimum) | 3.2 Ω (SE), 6.4 Ω (BTL) | Ω |
| Thermal Protection | Thermal and Short-Circuit Protection With Auto Recovery | |
| Oscillator Frequency | 250 to 350 kHz |
Key Features
- Efficient class-D operation eliminates the need for external heat sinks.
- Four selectable, fixed-gain settings (20, 26, 32, and 36 dB).
- Internal oscillator to set class-D frequency without external components.
- Single-ended analog inputs.
- Thermal and short-circuit protection with auto recovery.
- Space-saving surface mount 24-pin TSSOP package.
- Advanced power-off pop reduction.
- Operates from +24 V LCD backlight supply.
Applications
- Flat Panel Display TVs.
- DLP TVs.
- CRT TVs.
- Powered Speakers.
Q & A
- What is the TPA3121D2? The TPA3121D2 is a 15-W (per channel) class-D audio power amplifier designed for driving stereo speakers in a single-ended configuration or a mono speaker in a bridge-tied-load configuration.
- What is the supply voltage range of the TPA3121D2? The TPA3121D2 operates from 10 V to 26 V.
- What are the gain settings available for the TPA3121D2? The gain settings are 20, 26, 32, and 36 dB.
- Does the TPA3121D2 require an external heat sink? No, the efficient class-D operation of the TPA3121D2 eliminates the need for an external heat sink.
- What type of protection does the TPA3121D2 have? The TPA3121D2 has thermal and short-circuit protection with auto recovery.
- What is the package type of the TPA3121D2? The TPA3121D2 comes in a 24-pin HTSSOP (PWP) package.
- What are some common applications of the TPA3121D2? Common applications include Flat Panel Display TVs, DLP TVs, CRT TVs, and powered speakers.
- How does the TPA3121D2 minimize pop noise? The TPA3121D2 uses patented start-up and shutdown sequences to minimize pop noise without additional circuitry.
- What is the oscillator frequency range of the TPA3121D2? The oscillator frequency range is 250 to 350 kHz.
- Does the TPA3121D2 support single-ended analog inputs? Yes, the TPA3121D2 supports single-ended analog inputs.
