Adafruit TPA2012 Stereo 2.1W Class D Audio Amplifier Breakout | thingbits

Adafruit TPA2012 Stereo 2.1W Class D Audio Amplifier Breakout

Name: Adafruit TPA2012 Stereo 2.1W Class D Audio Amplifier Breakout
SKU: TH1988
Price: 979.0 INR
Availability: InStock

SKU: TH1988

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This incredibly small Adafruit TPA2012 stereo Class-D audio amplifier breakout packs a surprising punch, delivering up to 2 × 2.1W into 4Ω speakers while running efficiently from a 2.7V–5.5V DC supply. Built around the TPA2012 chip, it’s an excellent modern upgrade over legacy LM386 amplifiers, offering higher efficiency, better sound quality, and rock-solid protection features.

₹1,155.22

₹979.00 (Ex. of GST)

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Overview

Thanks to its Class-D architecture, the amplifier achieves up to 89% efficiency, making it ideal for portable, USB-powered, and battery-operated projects. Despite its power output, the board stays cool and includes thermal and over-current protection for reliable long-term operation.

For easy tuning, the breakout includes a dual mini DIP switch that lets you select one of four gain levels (6 dB, 12 dB, 18 dB, or 24 dB) on the fly. With excellent click-and-pop suppression, independent channel shutdown, and very low quiescent current, this board is perfect for compact embedded audio designs.

Note: Speakers are not included. Use 4Ω or 8Ω speakers. Terminal block color may be blue or black.

Specification

Technical details for Adafruit TPA2012 Stereo 2.1W Class D Audio Amplifier Breakout.

Specification	Details
Amplifier Type	Class D (Stereo)
Channels	2 (Left + Right)
Supply Voltage	2.7V to 5.5V DC
Quiescent Current	Typical 6 mA
Shutdown Current	Typical 1.5 µA
Output Power (5V Supply)	2.1W per channel @ 4Ω, 10% THD; 1.4W per channel @ 8Ω, 10% THD
Speaker Impedance	4Ω or 8Ω recommended
Efficiency	Up to ~89% (when driving an 8Ω speaker at 1.5W)
Inputs	Fully differential audio inputs with onboard 1.0µF coupling capacitors
Output Topology	Bridge-Tied Load (BTL) speaker outputs (no speaker terminal to GND)
Output Signal Type	PWM switching output (~300 kHz), intended to drive speakers directly
Output Filter Requirement	No external output filter required (keep speaker wires ~2"–4" max)
Gain Settings	4 selectable gains: 6 dB, 12 dB, 18 dB, 24 dB
Gain Control	Onboard dual mini DIP switch and/or G0 & G1 breakout pins
PSRR	77 dB typ @ 217 Hz (with 6 dB gain)
Noise / Artifacts	Excellent click-and-pop suppression
Protection Features	Thermal shutdown and over-current protection
Channel Control	Independent channel shutdown

Pinout

Pin Name	Description
VDD	Power supply input (2.7V–5.5V DC). Higher voltage provides higher output power. No reverse polarity protection.
GND	Ground reference for power and audio signals.
LO+	Left channel speaker output (+). Bridge-Tied Load (BTL) output — connect directly to speaker.
LO−	Left channel speaker output (−). Do not connect to ground.
RO+	Right channel speaker output (+). Bridge-Tied Load (BTL) output — connect directly to speaker.
RO−	Right channel speaker output (−). Do not connect to ground.
SDL	Shutdown control for left channel. Pull to GND to disable left channel. Pulled up to VDD by default.
SDR	Shutdown control for right channel. Pull to GND to disable right channel. Pulled up to VDD by default.
L+	Left channel audio input (+). Differential input.
L−	Left channel audio input (−). Tie to GND for single-ended audio.
R+	Right channel audio input (+). Differential input.
R−	Right channel audio input (−). Tie to GND for single-ended audio.
Speaker Compatibility	Use 4Ω or 8Ω speakers only. Recommended power rating: ≥3W for 4Ω, ≥2W for 8Ω.
Important Note	Speaker outputs are not line-level and must not be connected to another amplifier or to ground.