Overview
The TPA3128D2DAPR, produced by Texas Instruments, is a highly efficient Class-D audio amplifier designed for driving speakers in various audio applications. This device is capable of delivering 30 watts per channel in stereo mode or 60 watts in mono mode, operating within a wide voltage range of 4.5 to 26 volts. It is notable for its low idle power dissipation, making it ideal for battery-powered audio systems such as Bluetooth and wireless speakers, soundbars, and home theaters. The amplifier features advanced oscillator/PLL circuits, multiple switching frequencies, and adaptive modulation schemes to enhance efficiency and reduce noise.
Key Specifications
| Parameter | Value |
|---|---|
| Output Power (Stereo) | 2 x 30 W |
| Output Power (Mono) | 60 W |
| Operating Voltage Range | 4.5 V to 26 V |
| Idle Current | < 23 mA (with recommended LC filter configurations) |
| Efficiency | > 90% |
| Switching Frequency Range | 300 kHz to 1.2 MHz |
| Output Current | Up to 7.5 A |
| Package Type | HTSSOP (32-pin) |
| Protection Features | Overvoltage, Undervoltage, Overtemperature, DC-Detect, Short Circuit |
Key Features
- Efficient Class-D operation with very low idle current and high power efficiency.
- Adaptive modulation schemes based on output power to optimize performance.
- Multiple switching frequencies (300 kHz to 1.2 MHz) with AM avoidance and master/slave synchronization.
- Feedback power-stage architecture with high PSRR (Power Supply Rejection Ratio) to reduce PSU requirements.
- Programmable power limit and support for parallel BTL (Bridge-Tied Load) and mono-channel modes.
- Supports both single and dual power supply modes.
- Integrated self-protection circuits including overvoltage, undervoltage, overtemperature, DC-detect, and short circuit protection with error reporting.
- Thermally enhanced packages to improve heat dissipation.
Applications
- Bluetooth and wireless speakers.
- Soundbars.
- Mini-micro component systems and docks.
- LCD/LED TVs.
- Home theaters.
Q & A
- What is the output power of the TPA3128D2 in stereo mode?
The TPA3128D2 can deliver 2 x 30 watts in stereo mode.
- What is the operating voltage range of the TPA3128D2?
The operating voltage range is from 4.5 V to 26 V.
- What is the typical idle current of the TPA3128D2?
The typical idle current is less than 23 mA with recommended LC filter configurations.
- What are the switching frequency options for the TPA3128D2?
The switching frequency range is from 300 kHz to 1.2 MHz.
- Does the TPA3128D2 support master and slave operation?
Yes, it supports both master and slave operation using the SYNC pin.
- What protection features are integrated into the TPA3128D2?
The device includes overvoltage, undervoltage, overtemperature, DC-detect, and short circuit protection with error reporting.
- Can the TPA3128D2 operate in both single and dual power supply modes?
Yes, it supports both single and dual power supply modes.
- What is the maximum output current of the TPA3128D2?
The maximum output current is up to 7.5 A.
- What type of package is the TPA3128D2 available in?
The TPA3128D2 is available in a 32-pin HTSSOP package.
- What are some common applications for the TPA3128D2?
Common applications include Bluetooth and wireless speakers, soundbars, mini-micro component systems, LCD/LED TVs, and home theaters.
