Overview
The TDA7391LVPDTR is a bridge class AB audio power amplifier designed by STMicroelectronics, specifically for high-power car radio applications. This amplifier is part of the TDA7391LV series, known for its high power capability and versatility in input modes. It can operate in both differential and single-ended input modes, making it suitable for boosters and high-end car radio equipment. The device features an exclusive fully complementary output stage and an internal fixed gain configuration, which reduces the need for external components. Additionally, it includes a standby function and is compliant with recent OEM specifications for low voltage operation, including 'start-stop' and 'e-call' functions.
Key Specifications
| Parameter | Test Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Supply Voltage Range | - | 6 | - | 18 | V |
| Output Power (RL = 3.2 Ω, VS = 14.4 V, f = 1 kHz, THD = 10%) | - | - | 32 | W | |
| Output Power (RL = 4 Ω, VS = 14.4 V, f = 1 kHz, THD = 10%) | - | - | 26 | W | |
| Total Quiescent Current | - | - | 60 | 150 | mA |
| Output Offset Voltage | - | - | 120 | mV | |
| Standby Current (VST-BY = 1.5 V) | - | - | 50 | μA | |
| Thermal Resistance Junction-to-Case | - | - | 2 | °C/W | |
| Absolute Thermal Shutdown Junction Temperature | - | - | 160 | °C |
Key Features
- High power capability: up to 40 W/4 Ω and 45 W/3.2 Ω max.
- Differential inputs (accepts both single-ended and differential input signals).
- Minimum external component count due to internal fixed gain configuration and no need for bootstrap capacitors or Boucherot cells.
- Standby function (CMOS compatible) with low standby current.
- Programmable turn-on/off delay and no audible pop during mute and standby operations.
- Comprehensive protection features including short circuit, very inductive loads, chip over temperature, load dump, open GND, and ESD.
- On-board clipping detector for easy implementation of gain compression systems.
- Compliant with recent OEM specifications for low voltage operation ('start-stop' and 'e-call' functions).
Applications
The TDA7391LVPDTR is primarily designed for high-power car radio applications, including boosters and high-end car radio equipment. Its ability to operate at low voltages makes it suitable for systems that require 'start-stop' and 'e-call' functionalities, aligning with modern automotive requirements for reduced emissions and enhanced safety features.
Q & A
- What is the maximum output power of the TDA7391LVPDTR at 3.2 Ω load and 14.4 V supply voltage?
The maximum output power is 32 W at 3.2 Ω load and 14.4 V supply voltage with a THD of 10%.
- What types of input signals can the TDA7391LVPDTR accept?
The device can accept both single-ended and differential input signals.
- What is the standby current of the TDA7391LVPDTR when VST-BY = 1.5 V?
The standby current is up to 50 μA when VST-BY = 1.5 V.
- Does the TDA7391LVPDTR have built-in protection features?
Yes, it includes protections for short circuit, very inductive loads, chip over temperature, load dump, open GND, and ESD.
- What is the thermal shutdown junction temperature of the TDA7391LVPDTR?
The absolute thermal shutdown junction temperature is 160 °C.
- Is the TDA7391LVPDTR compliant with 'start-stop' and 'e-call' functions?
Yes, it is compliant with recent OEM specifications for low voltage operation, including 'start-stop' and 'e-call' functions.
- What is the supply voltage range of the TDA7391LVPDTR?
The supply voltage range is from 6 V to 18 V.
- Does the TDA7391LVPDTR require external bootstrap capacitors or Boucherot cells?
No, it does not require external bootstrap capacitors or Boucherot cells due to its internal fixed gain configuration.
- What is the input impedance of the TDA7391LVPDTR in differential mode?
The input impedance in differential mode is typically 36 kΩ to 60 kΩ.
- Does the TDA7391LVPDTR have an on-board clipping detector?
Yes, it has an on-board clipping detector that allows easy implementation of gain compression systems.
