Overview
The TDA7387 is an AB class audio power amplifier designed by STMicroelectronics, specifically tailored for high-end car radio applications. It is packaged in the Flexiwatt 25 format, which allows for a compact design. The amplifier features a fully complementary PNP/NPN configuration, enabling a rail-to-rail output voltage swing without the need for bootstrap capacitors. This design reduces the external component count, making it ideal for compact and efficient car audio systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Supply Voltage (VS) | 14.4 - 18 | V |
| Peak Supply Voltage (VS pk) | 50 | V |
| Output Power (THD = 10%) | 4 x 41 W / 4 Ω max. | W |
| Output Power (THD = 1%) | 4 x 22 W / 4 Ω max. | W |
| Quiescent Current (Iq) | 180 - 300 | mA |
| Output Offset Voltage (VOS) | -100 | mV |
| Voltage Gain (Gv) | 25 - 27 | dB |
| Distortion (THD) at Po = 4 W | 0.04 - 0.3% | % |
| Output Noise (eNo) 'A' Weighted | 50 - 65 μV | μV |
| Supply Voltage Rejection (SVR) | 50 - 65 dB | dB |
| Low Cut-off Frequency (fcl) | 20 | Hz |
| High Cut-off Frequency (fch) | 75 | kHz |
| Input Impedance (Ri) | 70 - 100 kΩ | kΩ |
| Standby Current Consumption | 15 μA | μA |
Key Features
- High output power capability: 4 x 41 W / 4 Ω max.
- Low distortion and low output noise.
- Standby and mute functions.
- Automute at minimum supply voltage detection.
- Low external component count: internally fixed gain (26 dB), no external compensation, and no bootstrap capacitors.
- Protections: output short circuit to GND, to VS, across the load, very inductive loads, overrating chip temperature with soft thermal limiter, load dump voltage, fortuitous open GND, reversed battery, and ESD.
- Ground-compatible inputs capable of handling high input signals (± 8 Vpk) without performance degradation.
- CMOS-compatible standby and mute facilities.
Applications
The TDA7387 is specifically designed for high-end car radio applications. Its features make it suitable for use in automotive audio systems where high power output, low distortion, and compact design are essential. It is also applicable in other automotive infotainment systems that require reliable and efficient audio amplification.
Q & A
- What is the TDA7387? The TDA7387 is an AB class audio power amplifier designed for high-end car radio applications.
- What is the maximum output power of the TDA7387? The maximum output power is 4 x 41 W / 4 Ω.
- What is the operating supply voltage range of the TDA7387? The operating supply voltage range is 14.4 - 18 V.
- Does the TDA7387 have built-in protection features? Yes, it includes protections such as output short circuit, overrating chip temperature, load dump voltage, and more.
- What is the quiescent current of the TDA7387? The quiescent current is between 180 - 300 mA.
- Is the TDA7387 compatible with high input signals? Yes, the inputs are ground-compatible and can handle high input signals (± 8 Vpk) without performance degradation.
- Does the TDA7387 require external compensation or bootstrap capacitors? No, it does not require external compensation or bootstrap capacitors.
- What are the standby and mute functions of the TDA7387? The TDA7387 has CMOS-compatible standby and mute functions.
- How does the TDA7387 manage supply voltage rejection? The TDA7387 uses a Supply Voltage Rejection (SVR) block to ensure high supply voltage rejection.
- What is the recommended value for the SVR capacitor? The minimum recommended value for the SVR capacitor is 10 μF.
