TDA7377 Class AB Audio Power Amplifier IC in ZIP-15 Package
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  • TDA7377 Class AB Audio Power Amplifier IC in ZIP-15 Package
  • TDA7377 Class AB Audio Power Amplifier IC in ZIP-15 Package
  • TDA7377 Class AB Audio Power Amplifier IC in ZIP-15 Package

TDA7377 Class AB Audio Power Amplifier IC in ZIP-15 Package

The TDA7377 is a Class AB power amplifier IC designed primarily for automotive audio systems. Manufactured by STMicroelectronics, it features a compact ZIP-15 package (also labeled MULTIWATT-15) and supports flexible configurations for both stereo and multi-channel setups. Its key strengths include high output power, low distortion, and robust protection mechanisms, making it suitable for car radios, portable speakers, and home audio amplifiers

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Key Features

  1. Dual Operation Modes:

    • Bridge Mode (BTL): Delivers 2 × 30W at 4Ω (typical 14.4V supply), ideal for driving front/rear speakers.

    • Quad Single-Ended Mode: Outputs 4 × 6W at 4Ω, enabling 4-channel audio systems.

  2. Protection & Stability:

    • Built-in short-circuit protection and thermal overload shutdown to prevent damage during faults or overheating.

    • "Pop-free" startup/shutdown eliminates audible noise spikes.

  3. Signal Quality:

    • Internally fixed gain (26dB in BTL, 20dB in SE mode) reduces external components and simplifies design.

    • Low distortion (<0.3%) and high signal-to-noise ratio (90dB).

  4. Power Management:

    • Wide operating voltage range: 8V–18V (DC), tolerating transient peaks up to 50V for 50ms.

    • CMOS-compatible standby mode minimizes power consumption during idle states.

  5. Diagnostic Capability:

    • Pin 10 (DIAG) provides real-time fault detection (e.g., clipping, short circuits).

Technical Specifications

Below is a summary of critical electrical and mechanical parameters:

Parameter Value Conditions
Supply Voltage 8V – 18V (DC) Operating range
Output Power 2 × 30W (BTL) / 4 × 6W (SE) @ 4Ω, THD ≤10%, V<sub>CC</sub>=14.4V
Total Harmonic Distortion < 0.3% Full power output
Standby Current ≤ 150μA V<sub>CC</sub>=14V
Operating Temperature -40°C to +150°C Junction range
Package Type ZIP-15 (Multiwatt-15) Dimensions: 29 × 16 × 4.2 mm
Protection Features Thermal shutdown, short-circuit Auto-recovery design

📌 *Note: Output power may vary with voltage and load impedance. For example, at 13.7V/4Ω, bridge mode delivers 2 × 30W (EIAJ standard).*

Applications

  • Car Audio Systems: Primary use case due to voltage range and robustness.

  • Portable Speakers: Low standby current extends battery life.

  • Home Theater/Amplifiers: Flexible channel configurations suit multi-room setups.

Comparison with Alternatives

  • vs. TDA7379: The TDA7379 offers higher power (2 × 38W) and enhanced transient response but requires more complex thermal management. The TDA7377 balances cost and simplicity for mainstream applications.

  • Equivalent Parts: TDA7375, TDA7376 (similar pinout and power profiles).

Design Notes

  • Layout Tips: Use low-resistance speaker cables and ensure solid grounding at PW-GND (Pin 8) and S-GND (Pin 9) to minimize noise.

  • Thermal Management: The ZIP-15 package requires a heatsink for sustained high-power operation

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