Texas Instruments TPA6112A2EVM

Overview

TPA6112A2EVM from Texas Instruments is an evaluation module built around the TPA6112A2 150-mW stereo audio power amplifier IC in MSOP-8 package, designed for rapid prototyping of headphone and line-level audio output stages. It operates from 2.5 V to 5.5 V, delivers ≤0.05% THD+N into 8 Ω at 1 kHz, supports differential inputs and single-ended outputs, and integrates internal pop reduction and thermal protection.

For engineers reviewing the TPA6112A2EVM datasheet, TPA6112A2EVM pinout, TPA6112A2EVM application, or TPA6112A2EVM equivalent, this module enables fast functional validation of stereo audio amplification in battery-powered portable devices, embedded audio interfaces, and low-power consumer electronics without PCB layout or soldering.

Technical Context

The TPA6112A2EVM implements a complete reference design for the TPA6112A2 IC, including input coupling networks (1 µF ceramic), output DC-blocking capacitors (33–1000 µF), shutdown control via momentary switch S1, and biasing resistors (82 kΩ/20 kΩ) configured for unity-gain differential-to-single-ended conversion. All passive components are surface-mount 0603 or A-size, optimized for minimal board area.

It interfaces directly with TI's Plug-N-Play Audio Amplifier Evaluation Platform via 11-pin PNP headers, enabling automatic power routing (VDD/GND), signal path switching (via S2/S3), and mute control (JP7 = Lo). Stand-alone operation is supported through direct header pin access to IN1±/IN2±, VO1/VO2, Shutdown, VDD, and GND.

Key Specifications

Availability

TPA6112A2EVM is available at Aetrix Electronics and suitable for portable audio development, embedded system audio validation, and educational lab instruction requiring stable component supply and documented reference designs.

Supply support for TPA6112A2EVM includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, specializing in analog, embedded processing, and digital signal technologies with over 90 years of innovation in electronics.

The TPA6112A2EVM belongs to TI's Audio Amplifier Evaluation Module product line, engineered to accelerate audio subsystem validation for consumer, portable, and industrial applications using TI's low-power Class-AB amplifier ICs.

FAQ

What is the primary function of the TPA6112A2EVM?

The TPA6112A2EVM is a dedicated evaluation module for the TPA6112A2 stereo audio power amplifier IC. Its primary function is to provide a ready-to-use hardware platform that demonstrates the IC's performance-including 150-mW output into 8 Ω, differential input operation, and shutdown control-without requiring custom PCB design. Engineers use the TPA6112A2EVM to verify audio signal integrity, measure THD+N, validate power efficiency, and integrate the amplifier into end systems such as portable media players or embedded audio interfaces.

Can the TPA6112A2EVM be used without the TI Plug-N-Play platform?

Yes, the TPA6112A2EVM supports stand-alone operation via its 11-pin PNP header on the underside. Users can wire directly to pins for IN1±, IN2±, VO1, VO2, Shutdown, VDD, and GND, enabling integration into existing test benches or custom circuits. The module's schematic (Figure 2–4) and quick-start guide (Section 2.3) specify required external components-including 33–1000 µF output coupling capacitors and proper shutdown pull-up-ensuring reliable operation outside the platform environment. The TPA6112A2EVM does not require platform firmware or host communication.

What load impedances are supported by the TPA6112A2EVM?

The TPA6112A2EVM supports minimum load impedances of 8 Ω for speaker outputs and 32 Ω for headphone outputs, consistent with the TPA6112A2 IC's specifications. When driving 32 Ω headphones, the module requires external 33–1000 µF DC-blocking capacitors between VO1/VO2 and the load, as shown in Figure 2–3. For line-level outputs (e.g., feeding ADC inputs or active speakers), the same capacitor range applies, and the module maintains THD+N <0.05% at 1 kHz into 8 Ω. Loads below 8 Ω are not supported and may trigger thermal shutdown.

Does the TPA6112A2EVM include power regulation circuitry?

No, the TPA6112A2EVM does not include onboard voltage regulation. It requires an externally supplied, regulated DC voltage between 2.5 V and 5.5 V applied directly to the VDD and GND header pins. The module accepts power either from TI's Plug-N-Play platform (via J6 connector or onboard regulator EVM SLVP097) or from a bench supply. Input polarity must be observed strictly-reverse or overvoltage (>5.5 V) risks fuse blowout and permanent damage. The TPA6112A2EVM itself contains only passive filtering (C7 = 10 µF) and biasing components, not active regulation.

How is shutdown functionality implemented on the TPA6112A2EVM?

Shutdown on the TPA6112A2EVM is implemented via a momentary tactile switch (S1) connected to the IC's active-low SHUTDOWN pin. In the default configuration, S1 pulls the pin to VDD when open (normal operation) and connects it to GND when pressed (shutdown mode). This reduces quiescent current to near-zero, disabling both amplifier channels while preserving bias settings. The switch is accessible on the top side of the board and is wired per the schematic in Figure 2–4. No external logic or microcontroller is needed-the TPA6112A2EVM's shutdown behavior mirrors the TPA6112A2 IC's native specification.