Overview
The TPA3118D2DAPR, produced by Texas Instruments, is a high-efficiency Class-D audio amplifier. This device is part of the TPA31xxD2 family, which includes the TPA3116D2 and TPA3130D2. The TPA3118D2 is designed to deliver 30 watts per channel into an 8-Ω load in stereo mode or 60 watts in mono mode, operating from a single power supply ranging from 4.5 V to 26 V. It features advanced modulation schemes, high power efficiency, and integrated self-protection circuits, making it suitable for a variety of consumer and automotive audio applications.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Output Power (Stereo) | 2 × 30 W | Into 8-Ω BTL load at 24 V |
| Output Power (Mono) | 60 W | Into 8-Ω load at 24 V |
| Supply Voltage Range | 4.5 V to 26 V | |
| Switching Frequency | Up to 1.2 MHz | |
| Power Efficiency | >90% | |
| Package Type | HTSSOP (32-pin) | DAP (Pad Down) |
| Ambient Temperature Range | –40°C to 85°C | |
| Thermal Trip Point | 150°C | |
| Overcurrent Trip Point | 7.5 A |
Key Features
- Supports multiple output configurations including stereo and mono modes.
- Advanced modulation schemes with AM avoidance and master/slave synchronization.
- High power efficiency (>90%) combined with low idle loss, reducing heat sink size.
- Feedback power-stage architecture with high PSRR (Power Supply Rejection Ratio) reduces PSU requirements.
- Programmable power limit and differential and single-ended inputs.
- Integrated self-protection circuits including overvoltage, undervoltage, overtemperature, DC-detect, and short circuit protection with error reporting.
- Thermally enhanced packages (HTSSOP) with a –40°C to 85°C ambient temperature range.
Applications
- Mini and micro component speakers.
- Speaker bars and docks.
- After-market automotive audio systems.
- CRT TVs.
- Consumer audio applications.
Q & A
- What is the output power of the TPA3118D2 in stereo mode?
The TPA3118D2 delivers 2 × 30 watts into an 8-Ω BTL load at 24 V in stereo mode.
- What is the maximum supply voltage for the TPA3118D2?
The maximum supply voltage for the TPA3118D2 is 26 V.
- What are the switching frequencies available for the TPA3118D2?
The TPA3118D2 supports switching frequencies up to 1.2 MHz.
- Does the TPA3118D2 have built-in protection circuits?
Yes, the TPA3118D2 includes integrated self-protection circuits for overvoltage, undervoltage, overtemperature, DC-detect, and short circuit protection.
- What is the ambient temperature range for the TPA3118D2?
The ambient temperature range for the TPA3118D2 is –40°C to 85°C.
- Can the TPA3118D2 be used in mono mode?
Yes, the TPA3118D2 can be used in mono mode, delivering up to 60 watts into an 8-Ω load at 24 V.
- What type of package is the TPA3118D2 available in?
The TPA3118D2 is available in a 32-pin HTSSOP (Pad Down) package.
- Does the TPA3118D2 support differential and single-ended inputs?
Yes, the TPA3118D2 supports both differential and single-ended inputs.
- What is the power efficiency of the TPA3118D2?
The power efficiency of the TPA3118D2 is greater than 90%.
- Can multiple TPA3118D2 devices be synchronized?
Yes, multiple TPA3118D2 devices can be synchronized using the master/slave option.
