TDA7388 4x40W Audio Power OpAmp
The TDA7388 is a rugged, quad‑channel AB‑class audio power amplifier delivering up to 4×45 W into 4 Ω loads, specifically designed for high‑end car radio applications.
Features
- High Output Power Capability
- 4×45 W (max) into 4 Ω
- 4×26 W @ 14.4 V, 1 kHz, 10 % THD
- Low Distortion & Noise
- THD typically 0.04 % at 4 W
- Output noise (A‑weighted) typ. 50 µV
- Integrated Protection
- Short‑circuit to ground or supply
- Load dump and reversed battery
- Thermal limiting with soft‑cutoff
- ESD protection
- Controls & Convenience
- Standby and Mute functions with automute on undervoltage
- Internally fixed gain (26 dB); no bootstrap capacitors required
- Low external component count
Package & Ordering
- Code: TDA7388
- Package: Flexiwatt 25 (tube packing)
- Operating Temperature: –40 °C to +85 °C
Specifications
(VS = 14.4 V; RL = 4 Ω; f = 1 kHz; Tamb = 25 °C)
| Parameter | Symbol | Typical | Units |
|---|---|---|---|
| Output Power (per channel) | Po | 26 | W |
| Maximum Output Power (sat. square) | Po max | 41 | W |
| Voltage Gain | Gv | 26 | dB |
| Total Harmonic Distortion | THD | 0.04 | % (at 4 W) |
| Signal‑to‑Noise Ratio (A‑weighted) | — | 20 log(Vo/No) ≈ > 75¹ | dB |
| Output Noise | eNo | 50 | µV (A‑weighted) |
| Supply Voltage Rejection | SVR | 65 | dB @ 100 Hz |
| Input Impedance | Ri | 70 | kΩ |
| Quiescent Current | Iq1 | 190 | mA |
| Operating Supply Voltage | VS | 8 – 18 | V |
| Peak Supply Voltage | VS (pk) | 50 | V (50 ms) |
Applications
- Car radio and automotive audio power amplifier
- High‑end in‑vehicle infotainment systems
- Aftermarket car audio upgrades
- Any compact, high‑power quad‑channel audio solution requiring minimal external components
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