Overview
The TPA3118D2 is a high-efficiency, Class-D audio amplifier from Texas Instruments, designed for driving speakers in various audio applications. This device is part of the TPA31xxD2 series, which includes the TPA3116D2 and TPA3130D2, all sharing the same footprint to enable flexibility in design. The TPA3118D2 can deliver up to 2 × 30 W into an 8-Ω bridge-tied load (BTL) at 24 V, making it suitable for a range of consumer and automotive audio systems. It operates over a wide voltage range of 4.5 V to 26 V and is known for its high power efficiency, reducing the need for external heat sinks in many configurations.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | HTSSOP (DAP) with 32 pins | |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage Range | 4.5 to 26 | V |
| Output Power (BTL) | 2 × 30 W at 24 V into 8 Ω | |
| Switching Frequency | Up to 1.2 MHz | |
| Power Efficiency | >90% | |
| Quiescent Supply Current | 20 to 50 mA at 12 to 24 V | |
| Thermal Resistance (Junction to Ambient) | 36 °C/W (DAP package) | °C/W |
Key Features
- Supports multiple output configurations: stereo and mono modes with single-filter mono configuration.
- Wide voltage range: 4.5 V to 26 V.
- Efficient Class-D operation with >90% power efficiency and low idle loss.
- Advanced modulation schemes with multiple switching frequencies and AM avoidance.
- Master and slave synchronization for multi-device setups.
- Feedback power-stage architecture with high PSRR, reducing PSU requirements.
- Programmable power limit and differential and single-ended inputs.
- Integrated self-protection circuits including overvoltage, undervoltage, overtemperature, DC-detect, and short circuit with error reporting.
- Thermally enhanced packages (DAD and DAP) with PowerPAD for improved thermal performance.
Applications
- Mini and micro component speakers.
- Speaker bars and docks.
- After-market automotive audio systems.
- Consumer audio applications, including CRT TVs and other home audio devices.
Q & A
- What is the maximum output power of the TPA3118D2?
The TPA3118D2 can deliver up to 2 × 30 W into an 8-Ω BTL load at 24 V.
- What is the operating temperature range of the TPA3118D2?
The operating temperature range is -40°C to 85°C.
- What is the supply voltage range for the TPA3118D2?
The supply voltage range is 4.5 V to 26 V.
- Does the TPA3118D2 support multiple output configurations?
- What is the power efficiency of the TPA3118D2?
The power efficiency is greater than 90%.
- Does the TPA3118D2 have built-in protection circuits?
- Can the TPA3118D2 be synchronized with other devices?
- What is the switching frequency range of the TPA3118D2?
- What type of package is the TPA3118D2 available in?
- What are some common applications for the TPA3118D2?
