Overview
The TDA7391PD is a bridge class AB audio power amplifier designed by STMicroelectronics, specifically intended for high-power car radio applications. This amplifier is known for its high power capability, minimal external component count, and robust protection features. It operates in either differential or single-ended input modes, making it versatile for various car audio systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| DC Supply Voltage (VS) | 8 - 18 | V |
| Peak Supply Voltage (VPEAK) | 50 | V (t = 50 ms) |
| Output Peak Current (Repetitive) | 4.5 | A (f > 10 Hz) |
| Output Peak Current (Non-Repetitive) | 6 | A |
| Power Dissipation (Tcase = 85 °C) | 32 | W |
| Storage and Junction Temperature | -40 to 150 | °C |
| Thermal Resistance Junction-to-Case | 2 | °C/W |
| Total Quiescent Current | 60 - 150 | mA |
| Output Offset Voltage | -120 | mV |
| Standby Current | 100 | μA |
| Output Power @ RL = 3.2 Ω, d = 10% | 32 | W |
| Output Power @ RL = 4 Ω, d = 10% | 26 | W |
| Distortion @ PO = 0.1 to 15 W | 0.03 - 0.06 | % |
| Voltage Gain | 29.5 - 30.5 | dB |
| High Frequency Rolloff | 75 | kHz |
Key Features
- High power capability: up to 32 W @ 3.2 Ω and 26 W @ 4 Ω with VS = 14.4 V and d = 10%.
- Differential inputs: accepts both single-ended and differential input signals.
- Minimum external component count: no bootstrap capacitors, Boucherot cells, or SVR capacitor required.
- Internally fixed gain (30 dB).
- Standby function with CMOS compatibility.
- Programmable turn-on/off delay.
- No audible pop during mute and standby operations.
- Robust protection features: short circuit, very inductive loads, chip over temperature, load dump, open GND, and ESD protection.
- On-board clipping detector for easy implementation of gain compression systems.
Applications
The TDA7391PD is specifically designed for high-power car radio applications, including boosters and high-end car audio equipment. Its versatility in input modes and robust protection features make it an ideal choice for demanding automotive audio systems.
Q & A
- What is the TDA7391PD used for? The TDA7391PD is used for high-power car radio applications, including boosters and high-end car audio equipment.
- What are the key power specifications of the TDA7391PD? It can deliver up to 32 W @ 3.2 Ω and 26 W @ 4 Ω with VS = 14.4 V and d = 10%.
- Does the TDA7391PD support differential inputs? Yes, it accepts both single-ended and differential input signals.
- What are the protection features of the TDA7391PD? It includes protections against short circuits, very inductive loads, chip over temperature, load dump, open GND, and ESD.
- How does the standby function work? The standby function shuts down all internal bias supplies when the ST-BY pin is low, reducing the current to a few μA.
- Can the TDA7391PD be used in other applications besides car radios? While it is specifically designed for car radios, its features make it potentially suitable for other high-power audio applications requiring similar specifications.
- What is the thermal resistance junction-to-case of the TDA7391PD? The thermal resistance junction-to-case is 2 °C/W.
- How does the clipping detection feature work? The on-board clipping detector provides a low-level signal during clipping, allowing for easy implementation of gain compression systems.
- What is the voltage gain of the TDA7391PD? The voltage gain is internally fixed at 30 dB.
- Is the TDA7391PD environmentally compliant? Yes, it is available in ECOPACK® packages that meet environmental compliance standards.
