Overview
The TDA7391LVPDUTR, produced by STMicroelectronics, is a high-performance bridge class AB audio power amplifier designed specifically for car radio applications. This component is renowned for its high power capability, low voltage operation, and comprehensive protection features. It is suitable for high-end car radio equipment due to its ability to operate in both differential and single-ended input modes. The amplifier is compliant with recent OEM specifications for low voltage operation, including 'start-stop' and 'e-call' functions, making it an ideal choice for modern automotive audio systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| DC Supply Voltage (VS) | 6 - 18 | V |
| Operating Supply Voltage (VOP) | 18 | V |
| Peak Supply Voltage (VPEAK) | 50 | V (t = 50 ms) |
| Output Peak Current (Repetitive) | 4.5 | A |
| Output Peak Current (Non-Repetitive) | 6 | A |
| Power Dissipation (Ptot) | 43 | W (Tcase = 85 °C) |
| Thermal Resistance (Rth j-case) | 1.8 | °C/W (Multiwatt) |
| Storage and Junction Temperature (Tstg, Tj) | -40 to 150 | °C |
| Total Quiescent Current (Iq) | 60 - 150 | mA |
| Output Power (PO) @ THD = 10%, RL = 4 Ω | 26 | W |
| Output Power (PO) @ THD = 10%, RL = 3.2 Ω | 32 | W |
| Output Power (PO) @ VS = 6 V, THD = 10%, RL = 4 Ω | 4.2 | W |
| Total Harmonic Distortion (THD) | 0.06 | % (PO = 0.1 to 15 W) |
| Voltage Gain (GV) | 29.5 - 30.5 | dB |
| Input Impedance (RIN) Differential | 36 - 60 | kΩ |
| Input Impedance (RIN) Single-ended | 30 - 55 | kΩ |
Key Features
- High power capability: up to 40 W/4 Ω and 45 W/3.2 Ω.
- Differential inputs (accepts both single-ended and differential input signals).
- Minimum external component count due to internal fixed gain configuration.
- Standby function (CMOS compatible) with low standby current.
- Comprehensive protection features: short circuit, very inductive loads, chip overtemperature, load dump, open GND, and ESD protection.
- On-board clipping detector for easy implementation of gain compression systems.
- Low voltage operation compatibility ('start-stop' and 'e-call' functions).
- Automatic mute during turn-on/off to prevent noisy transients.
Applications
The TDA7391LVPDUTR is primarily designed for high-end car radio applications, particularly where high power output and low voltage operation are critical. It is suitable for use in automotive audio systems that require robust performance and compliance with modern OEM specifications. Other potential applications include audio systems in vehicles that need to operate under varying battery conditions, such as during 'start-stop' engine cycles.
Q & A
- What is the maximum output power of the TDA7391LVPDUTR? The maximum output power is up to 45 W into a 3.2 Ω load and 26 W into a 4 Ω load at THD = 10%.
- What is the supply voltage range for the TDA7391LVPDUTR? The supply voltage range is from 6 V to 18 V.
- Does the TDA7391LVPDUTR support low voltage operation? Yes, it is designed to operate continuously even when the battery voltage drops to 6/7 V during 'start-stop' conditions.
- What protection features does the TDA7391LVPDUTR have? It includes protections against short circuits, very inductive loads, chip overtemperature, load dump, open GND, and ESD.
- How does the standby function work? The standby function shuts down all internal bias supplies when the standby pin is low, reducing the current to a few μA.
- What is the purpose of the on-board clipping detector? The on-board clipping detector allows for easy implementation of gain compression systems by providing a low-level signal during clipping.
- What is the thermal shutdown temperature of the TDA7391LVPDUTR? The absolute thermal shutdown junction temperature is 160 °C.
- What are the typical applications of the TDA7391LVPDUTR? It is primarily used in high-end car radio applications and other automotive audio systems requiring high power and low voltage operation.
- Does the TDA7391LVPDUTR support differential and single-ended input signals? Yes, it accepts both differential and single-ended input signals.
- How does the automatic mute function work? The automatic mute function prevents noisy transients during turn-on and turn-off by connecting the mute pin to a capacitor tied to GND.
