Overview
The TDA7391LVPDU, produced by STMicroelectronics, is a 40 W bridge class AB audio power amplifier designed specifically for car radio applications. This amplifier is notable for its high power capability and the ability to operate at low voltage levels, making it compliant with recent OEM specifications for 'start-stop' and 'e-call' functions. The device features a fully complementary output stage, internal fixed gain configuration, and a minimal external component count, which simplifies the design and implementation process.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Maximum Output Power (VS = 14.4 V, RL = 4 Ω, THD = 10%) | 26 | W |
| Maximum Output Power (VS = 14.4 V, RL = 3.2 Ω, THD = 10%) | 32 | W |
| Maximum Output Power (VS = 6 V, RL = 4 Ω, THD = 10%) | 6 | W |
| Supply Voltage Range | 6 - 18 | V |
| Total Quiescent Current | 60 - 150 | mA |
| Standby Current (VST-BY = 1.5 V) | 50 | μA |
| Output Offset Voltage | -120 | mV |
| Total Harmonic Distortion (THD) at 1 kHz | 0.06 | % |
| Input Impedance (Differential) | 36 - 60 | kΩ |
| Input Noise Voltage | 4 | mV |
| Thermal Resistance Junction-to-Case (Multiwatt 11) | 1.8 | °C/W |
Key Features
- High Power Capability: Up to 40 W into 4 Ω and 45 W into 3.2 Ω loads.
- Differential Inputs: Accepts either single-ended or differential input signals.
- Low Voltage Operation: Continuous operation down to 6/7 V, compliant with 'start-stop' and 'e-call' functions.
- Minimum External Component Count: Internal fixed gain configuration reduces the need for external components.
- Standby Function: CMOS compatible standby mode with low current consumption.
- Protection Features: Includes short circuit, overtemperature, load dump, and ESD protections.
- Clipping Detection: On-board clipping detector for easy implementation of gain compression systems.
- Automatic Mute: Prevents noisy transients during turn-on and turn-off.
Applications
The TDA7391LVPDU is primarily designed for high-end car radio equipment, particularly where high power output and low voltage operation are critical. It is suitable for various automotive audio systems, including those requiring compliance with recent OEM specifications for 'start-stop' and 'e-call' functions.
Q & A
- What is the maximum output power of the TDA7391LVPDU at 14.4 V supply voltage and 4 Ω load?
26 W at THD = 10%.
- Can the TDA7391LVPDU operate at low battery voltages?
- What types of input signals can the TDA7391LVPDU accept?
It can accept both single-ended and differential input signals.
- What is the standby current consumption of the TDA7391LVPDU?
50 μA when the standby pin is low.
- Does the TDA7391LVPDU have built-in protection features?
- How does the TDA7391LVPDU prevent noisy transients during power-on and power-off?
It features an automatic mute function during turn-on and turn-off.
- What is the thermal resistance junction-to-case for the Multiwatt 11 package?
1.8 °C/W.
- What is the input impedance of the TDA7391LVPDU in differential mode?
36 - 60 kΩ.
- What is the total harmonic distortion (THD) of the TDA7391LVPDU at 1 kHz?
0.06%.
- Is the TDA7391LVPDU available in different package types?
