TDA7388 Car Stereo Amplifier Circuit Diagram & TDA7851

Universal TDA 7388 4Channel Amplifier Board ..#audiosystems #amplifierboard #amplifier #tda7388

TDA7388

If you’re thinking about upgrading your car stereo, the TDA7388 amplifier chip is a great choice. It’s a 4-channel AB-class audio amp that delivers up to 41W per channel at 14.4V. The sound quality is clean and distortion-free, perfect for directly driving your car speakers. It includes built-in protections like short-circuit, overheating, over-voltage, as well as handy features like soft-start and mute/standby modes. With its Multiwatt15 package that includes a built-in heatsink and supports dual power supplies, installation is straightforward. Plus, the differential inputs effectively reduce electromagnetic interference in your vehicle, ensuring stable sound quality. It’s ideal whether you’re tackling an OEM project or DIY upgrade.

TDA7388 Pinout Diagram

TDA7388 Equivalent Audio Amplifier

If you’re using the TDA7388 and looking for alternatives, the TDA7386 and STA540 are your easiest picks—fully compatible, no need to modify your circuit or layout. Great for quick repairs or mass production. If you’re aiming higher, the TDA7560 provides improved performance, with I²C-controlled digital volume and mute functions. Just keep in mind, you’ll need extra wiring and software support for the I²C interface. The TDA7377 is another option with a unique channel configuration (two bridged channels and two single-ended), offering more design flexibility. However, you’ll have to double-check your speaker connections before swapping it directly with the TDA7388.

TDA7388 4 Channel Amplifier Circuit

When wiring the TDA7388, pins 6 and 20 supply power together, filtered by 470μF and 0.1μF capacitors to reduce noise. Pins 4 (STBY) and 22 (MUTE) use resistor-capacitor networks for soft startup, avoiding pops. Inputs (pins 11,13,14,15) benefit from 0.1μF coupling capacitors for cleaner sound. Outputs (pins 8/9, 2/3, 18/19, 21/23) drive 4Ω speakers directly in bridge mode. Pin 16 stabilizes audio bias with a capacitor; pin 1 tab needs good grounding for cooling.

TDA7388 Stereo to Quad Amp Wiring

If you have a stereo input but want to power four speakers with the TDA7388, here’s an easy solution: connect your left channel input (L) to IN1 and IN2 (front-left & rear-left speakers), and the right channel input (R) to IN3 and IN4 (front-right & rear-right speakers). This setup lets you play the same audio front-to-back, ideal for simple car audio or home speaker upgrades where separate channels aren’t crucial.

TDA7388 Subwoofer Amplifier Project