The TDA7377 is a high‑efficiency dual‑channel audio power amplifier integrated circuit designed for 12 V DC operation. Each channel can deliver up to 35 W of continuous power into 4 Ω loads, providing clear, medium‑power audio suitable for a wide range of speaker configurations.

Key Technical Features

• Dual‑Channel Architecture: Independent left and right outputs enable true stereo performance.


• 35 W per Channel: Capable of delivering up to 35 W RMS into 4 Ω speakers, with robust thermal protection.


• 12 V Optimized Supply: Designed for automotive, battery‑powered, and low‑voltage DC environments.


• Integrated Protection: Over‑temperature shutdown, short‑circuit protection, and thermal overload detection ensure reliable operation.


• Low Distortion: THD+N typically below 0.05 % at rated power, preserving audio fidelity.


• Compact Footprint: Small DIP‑8 package simplifies PCB layout for space‑constrained projects.

Typical Specifications

• Supply Voltage: 8 V – 15 V (optimal at 12 V)


• Output Power: 35 W RMS per channel into 4 Ω


• Gain: Adjustable via external resistors (typical 20 dB)


• Operating Temperature: -40 °C – 125 °C


• Input Impedance: 10 kΩ


• Signal-to-Noise Ratio: ≥ 85 dB

Recommended Applications

• Car audio head units and aftermarket amplifiers


• Portable battery‑powered speaker systems


• DIY home‑theater and desktop audio projects


• Compact multimedia devices requiring stereo amplification


• Educational kits and prototype boards for audio engineering

Integration Benefits

• Easy Design: Minimal external components required for stable operation.


• Energy Efficient: Low quiescent current reduces overall power consumption.


• Robust Reliability: Built‑in protection circuits safeguard both the IC and connected speakers.


• Scalable Performance: Suitable for both low‑power portable devices and higher‑output automotive installations.

Installation Tips

• Ensure proper heat sinking or thermal vias to maintain junction temperature below the specified limit.


• Use decoupling capacitors (0.1 µF ceramic and 10 µF electrolytic) close to the supply pins to minimize voltage ripple.


• Adjust gain with precision resistors according to the desired output level and speaker sensitivity.


• Route input and output traces with controlled impedance to preserve signal integrity.