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TDA7388 4×41W Car Audio Amplifier IC – Stereo & Bridged Amplifier Chip
TDA7388 4×41W Car Audio Amplifier IC – Stereo & Bridged Amplifier Chip
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TDA7388 4x41W Quad Bridge Car Audio Amplifier IC
The TDA7388 is a quad bridge (BTL) audio power amplifier IC from STMicroelectronics, delivering 4x41W peak power (4x25W RMS at 4 ohm, 14.4V) in a Multiwatt15 package. Designed for car audio head units and 4-channel amplifiers, it features built-in standby/mute, diagnostic output, and comprehensive protection in a single IC.
Key Specifications
| Parameter | Value |
|---|---|
| Part Number | TDA7388 |
| Package | Multiwatt15 (ZIP-15) |
| Supply Voltage | 8V - 18V DC |
| Output Power (Peak) | 4x41W @ 14.4V, 4 ohm |
| Output Power (RMS, 1% THD) | 4x25W @ 14.4V, 4 ohm |
| Output Power (RMS, 10% THD) | 4x35W @ 14.4V, 4 ohm |
| Frequency Response | 20Hz - 20kHz |
| THD (at 1W) | 0.04% typical |
| Signal-to-Noise Ratio | 102dB typical |
| Standby Mode | Yes (ST-BY pin) |
| Mute Function | Yes (MUTE pin) |
| Diagnostic Output | Yes (DIAG pin - fault indicator) |
| Protection | Thermal shutdown, short-circuit, load dump, ESD |
TDA7388 vs TDA7377A
| Feature | TDA7388 | TDA7377A |
|---|---|---|
| Channels | 4 (quad bridge) | 2 (stereo bridge) or 4 (quad SE) |
| Peak Power | 4x41W | 2x30W (bridge) |
| Diagnostic Pin | Yes | No |
| Best For | 4-channel car audio | Stereo home/car audio |
Why Choose TDA7388?
- 4x41W Peak Power - Full 4-channel amplification for front/rear speaker systems
- 0.04% THD at 1W - Excellent audio fidelity for music reproduction
- 102dB SNR - Low noise floor for clean audio in car environment
- DIAG Pin - Fault detection output for system monitoring
- Comprehensive Protection - Thermal, short-circuit, load dump, and ESD protection
Typical Applications
- Car audio head unit 4-channel amplifier stage
- DIY 4-channel car amplifier board
- Motorcycle audio system amplifier
- Marine audio 4-channel amplifier
- Home theater surround sound amplifier (4 channels)
Typical Application Circuit
Supply: 12V-14.4V DC. Input: AC-coupled via 1uF capacitors (4 channels). Gain: set by external resistors (typical 26dB). Bypass: 100uF on VS pin, 100nF on each supply bypass. Heatsink required: thermal resistance 2C/W or lower for full power operation.
FAQ
Q: Can TDA7388 drive 2 ohm speakers? Not recommended - minimum load is 4 ohm. At 2 ohm, output current exceeds safe limits and thermal shutdown may activate.
Q: What heatsink is needed for TDA7388? At 4x25W RMS, total dissipation is approximately 40W. Use a heatsink with thermal resistance of 1.5-2C/W with thermal compound for reliable continuous operation.
Package Contents
- 1x TDA7388 Multiwatt15 Quad Bridge Audio Amplifier IC
