Overview
The TPA3111D1-Q1 is a 10-W efficient, monaural Class-D audio power amplifier designed by Texas Instruments. This device is specifically tailored for automotive applications and is AEC-Q100 qualified, ensuring robust performance across a wide temperature range of –40°C to 125°C. It features advanced EMI suppression technology and SpeakerGuard™ protection, which includes an adjustable power limiter and DC detection circuitry. The amplifier is capable of driving a bridge-tied speaker with high efficiency, eliminating the need for an external heat sink during typical music playback.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Continuous Output Power (THD+N ≤ 0.1%, f = 1 kHz, VCC = 24 V) | 10 | W (into 8-Ω load) |
| Continuous Output Power (THD+N ≤ 0.1%, f = 1 kHz, VCC = 8 V) | 7 | W (into 4-Ω load) |
| Supply Voltage Range | 8 to 26 | V |
| Efficiency | > 90% | % (into 8-Ω load) |
| Total Harmonic Distortion + Noise (THD+N) | 0.06% | % (VCC = 24 V, f = 1 kHz, PO = 5 W) |
| Signal-to-Noise Ratio (SNR) | 102 | dB (A-weighted) |
| Oscillator Frequency | 250 to 350 | kHz |
| Thermal Trip Point | 150 ± 15 | °C |
| Package Type | HTSSOP (28 pins) | - |
| Body Size | 9.70 mm × 4.40 mm | - |
Key Features
- Advanced EMI Suppression Technology: Enables the use of inexpensive ferrite bead filters at the outputs while meeting EMC requirements.
- SpeakerGuard™ Protection: Includes an adjustable power limiter and a DC detection circuit to protect speakers from DC current and other faults.
- Short-Circuit Protection and Automatic Recovery: Protects against shorts to GND, VCC, and output-to-output, with an auto-recovery feature.
- Thermal Protection: Automatically shuts down the device if the die temperature exceeds 150°C and recovers when the temperature decreases.
- Filter-Free Operation: Eliminates the need for external filters.
- High Efficiency: > 90% efficient operation, eliminating the need for an external heat sink during music playback.
- Four Selectable Fixed Gain Settings: Set by the GAIN0 and GAIN1 pins.
- Differential Inputs: Supports differential input configurations.
- Shutdown Mode: Reduces supply current to a minimum level during periods of non-use for power conservation.
Applications
- Automotive Infotainment Systems: Suitable for head units, clusters, telematics, and navigation systems.
- Automotive Emergency Call (eCall) Systems: Used in emergency call systems for vehicles.
- Automotive Noise Generation for HEV/EV: Applicable in hybrid and electric vehicles for noise generation.
- Automotive Connectivity Gateway: Used in automotive connectivity and communication systems.
- Professional Audio Equipment: Suitable for PA speakers, studio headphones, performance amplifiers, and premium microphones.
- Aerospace and Aviation Audio Systems: Used in various audio applications within aerospace and aviation.
Q & A
- What is the maximum continuous output power of the TPA3111D1-Q1?
The maximum continuous output power is 10 W into an 8-Ω load at 10% THD+N from a 12-V supply, and 7 W into a 4-Ω load at 10% THD+N from an 8-V supply.
- What is the supply voltage range for the TPA3111D1-Q1?
The supply voltage range is from 8 to 26 V.
- What protection mechanisms does the TPA3111D1-Q1 have?
The device includes DC detection, short-circuit protection, thermal protection, and an adjustable power limiter as part of the SpeakerGuard™ protection.
- How does the thermal protection work on the TPA3111D1-Q1?
The device enters a shutdown state if the die temperature exceeds 150°C (±15°C) and recovers automatically when the temperature decreases by 15°C.
- What is the efficiency of the TPA3111D1-Q1?
The device operates with an efficiency of greater than 90% into an 8-Ω load.
- Can the TPA3111D1-Q1 be used in automotive applications?
Yes, the TPA3111D1-Q1 is AEC-Q100 qualified and designed for automotive applications.
- How many gain settings are available on the TPA3111D1-Q1?
There are four selectable fixed gain settings, controlled by the GAIN0 and GAIN1 pins.
- What is the package type of the TPA3111D1-Q1?
The device is packaged in a HTSSOP (28 pins) with a body size of 9.70 mm × 4.40 mm.
- Does the TPA3111D1-Q1 require an external heat sink?
No, the high efficiency of the device eliminates the need for an external heat sink during typical music playback.
- How does the shutdown mode work on the TPA3111D1-Q1?
The shutdown mode reduces the supply current to a minimum level during periods of non-use for power conservation, and can be triggered via the SD pin.
