Overview
The TDA7384A 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 and efficient design. This amplifier is based on 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 car audio systems.
Key Specifications
| Symbol | Parameter | Test Condition | Min. | Max. | Unit | |
|---|---|---|---|---|---|---|
| VS | Operating supply voltage | 18 | V | |||
| VS (DC) | DC supply voltage | 28 | V | |||
| VS (pk) | Peak supply voltage (t = 50 ms) | 50 | V | |||
| IO | Output peak current | Repetitive (duty cycle 10% at f = 10 Hz) | 4.5 | 5.5 | A | |
| Po | Output power | THD = 10%; VS = 14.4V | 24 | 27 | W | |
| Po max | Max. output power | VS = 14.4V | 46 | W | ||
| THD | Distortion | Po = 4W | 0.04 | 0.15 | % | |
| eNo | Output noise | 'A' Weighted | 50 | 70 | μV | |
| SVR | Supply voltage rejection | f = 100 Hz; Vr = 1 Vrms | 50 | 65 | dB | |
| Ri | Input Impedance | 70 | 100 | kΩ | ||
| ISB | Standby current consumption | VSt-by = 0 V | 20 | μA |
Key Features
- High Output Power Capability: Up to 4 x 46 W / 4 Ω max and 4 x 27 W / 4 Ω at 14.4 V, 1 kHz, 10% THD.
- Low Distortion: Ensures high-quality audio output with minimal distortion.
- Low Output Noise: 'A' weighted output noise as low as 50 μV.
- Standby and Mute Functions: Includes standby and mute functions with specific threshold voltages for efficient power management.
- Low External Component Count: Internally fixed gain (26 dB) and no need for external compensation or bootstrap capacitors.
- Protections: Comprehensive protection features including output short circuit, overrating chip temperature, load dump voltage, and ESD protection.
- Compact Design: Packaged in Flexiwatt 25, making it suitable for compact car audio systems.
Applications
The TDA7384A is specifically designed for high-end car radio applications. Its features make it an ideal choice for automotive audio systems where high power output, low distortion, and compact design are essential.
Q & A
- What is the maximum output power of the TDA7384A?
The TDA7384A can deliver up to 4 x 46 W / 4 Ω max and 4 x 27 W / 4 Ω at 14.4 V, 1 kHz, 10% THD.
- What is the typical quiescent current of the TDA7384A?
The typical quiescent current is 190 mA.
- What are the standby and mute functions in the TDA7384A?
The TDA7384A includes standby and mute functions with specific threshold voltages for efficient power management. The standby current consumption is as low as 20 μA when VSt-by = 0 V.
- What protections does the TDA7384A offer?
The TDA7384A offers comprehensive protection features including output short circuit, overrating chip temperature, load dump voltage, and ESD protection.
- What is the input impedance of the TDA7384A?
The input impedance is between 70 kΩ and 100 kΩ.
- How does the TDA7384A manage thermal issues?
The TDA7384A includes a soft thermal limiter to manage overrating chip temperature and has a thermal resistance junction-to-case of 1 °C/W.
- What is the supply voltage rejection of the TDA7384A?
The supply voltage rejection is 50 dB to 65 dB at f = 100 Hz; Vr = 1 Vrms.
- Can the TDA7384A handle high input signals?
Yes, the inputs are ground-compatible and can stand very high input signals (± 8 Vpk) without any performance degradation.
- How does the TDA7384A optimize pop during ON/OFF transients?
The SVR capacitor plays an essential role in optimizing pop during ON/OFF transients, with a minimum recommended value of 10 μF.
- What package type is the TDA7384A available in?
The TDA7384A is packaged in Flexiwatt 25.
