Overview
The TPA6111A2 is a stereo audio power amplifier designed and manufactured by Texas Instruments. This device is available in 8-pin SOIC and 8-pin MSOP packages and is capable of delivering 150 mW of continuous RMS power per channel into 16-Ω loads. It is fully specified for operation at 3.3 V and 5 V, making it suitable for a wide range of applications including PC and mobile devices. The amplifier gain is externally configurable from 0 dB to 20 dB using two resistors per channel, and it does not require external compensation for these settings. The TPA6111A2 features pop reduction circuitry, internal midrail generation, and thermal and short-circuit protection, enhancing its reliability and performance.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VDD) | 2.5 | - | 5.5 | V |
| Output Power (each channel) at VDD = 5 V, THD ≤ 0.1%, f = 1 kHz | - | - | 150 | mW |
| Output Power (each channel) at VDD = 3.3 V, THD ≤ 0.1%, f = 1 kHz | - | - | 35 | mW |
| Total Harmonic Distortion + Noise (THD+N) at VDD = 5 V, PO = 100 mW, 20 Hz – 20 kHz | - | - | 0.6% | % |
| Supply Current (IDD) at VDD = 5 V, SHUTDOWN (pin 5) = 0 V | 1.5 | 3 | 3.2 | mA |
| Supply Current in Shutdown Mode (IDD(SD)) at VDD = 5 V, SHUTDOWN (pin 5) = VDD | 1 | - | 10 | µA |
| Operating Junction Temperature (TJ) | -40 | - | 150 | °C |
| Storage Temperature (Tstg) | -65 | - | 150 | °C |
Key Features
- 150-mW stereo output per channel
- PC power supply compatible – fully specified for 3.3-V and 5-V operation
- Pop reduction circuitry
- Internal midrail generation
- Thermal and short-circuit protection
- Surface-mount packaging – PowerPAD™ MSOP and SOIC
- Pin compatible with TPA122, LM4880, and LM4881 (SOIC)
- Externally configurable gain from 0 dB to 20 dB using two resistors per channel
- Low shutdown current
Applications
- Smart Phones and Wireless Handsets
- Portable Tablets
- Notebook PCs and Docking Stations
Q & A
- What is the maximum output power of the TPA6111A2 per channel at 5 V?
The maximum output power per channel at 5 V is 150 mW with THD ≤ 0.1% at 1 kHz.
- What are the typical operating voltages for the TPA6111A2?
The device is fully specified for operation at 3.3 V and 5 V.
- How is the gain of the TPA6111A2 configured?
The gain is externally configured using two resistors per channel and can be set from 0 dB to 20 dB.
- What kind of protection does the TPA6111A2 have?
The device features thermal and short-circuit protection.
- What is the shutdown current of the TPA6111A2?
The supply current in shutdown mode is typically 1 µA to 10 µA.
- What are the package options for the TPA6111A2?
The device is available in 8-pin SOIC and 8-pin MSOP packages.
- What is the input impedance of the TPA6111A2?
The input impedance is greater than 1 MΩ.
- How does the TPA6111A2 reduce pop noise?
The device features pop reduction circuitry to minimize pop noise during power-up and power-down.
- What is the signal-to-noise ratio (SNR) of the TPA6111A2?
The SNR is typically 100 dB at an output power of 100 mW and a voltage gain of 1.
- What are some common applications for the TPA6111A2?
Common applications include smart phones, wireless handsets, portable tablets, and notebook PCs.
