Overview
The TDA7391PDUTR, produced by STMicroelectronics, is a bridge class AB audio power amplifier specifically designed for high-power car radio applications. This amplifier is renowned for its high power capability, minimal external component requirements, and robust protection features. It is suitable for use in boosters and high-end car radio equipment due to its ability to operate in both differential and single-ended input modes.
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 (Ptot) | 32 | W (Tcase = 85 °C) |
| Storage and Junction Temperature | -40 to 150 | °C |
| Total Quiescent Current (Iq) | 60 - 150 | mA |
| Output Offset Voltage (VOS) | -120 | mV |
| Standby Current (ISB) | 100 | μA (VST-BY = 1.5 V) |
| Standby Input Bias Current (ISBin) | 10 | μA (VST-BY = 5 V) |
| Standby On Threshold Voltage (VSBon) | 1.5 | V |
| Standby Off Threshold Voltage (VSBoff) | 3.5 | V |
| Output Power (PO) @ RL = 4 Ω, d = 10% | 26 | W |
| Output Power (PO) @ RL = 3.2 Ω, d = 10% | 32 | W |
| EIAJ Output Power @ VS = 13.7 V | 40 | W |
| Distortion (d) @ PO = 0.1 to 15 W | 0.03 - 0.06 | % |
| Voltage Gain (GV) | 29.5 - 30.5 | dB |
| High Frequency Rolloff (fH) @ PO = 1 W, -3 dB | 75 | kHz |
| Input Impedance (RIN) | 36 - 60 kΩ (Differential), 30 - 55 kΩ (Single Ended) | kΩ |
| Input Noise Voltage (EIN) | 4 | mV (Rg = 0 Ω, f = 22 Hz to 22 kHz) |
| Common Mode Rejection Ratio (CMRR) | 65 | dB (f = 1 kHz, VIN = 1 Vrms) |
| Supply Voltage Rejection (SVR) | 60 | dB (Rg = 0 Ω, Vr = 1 Vrms) |
| Clipping Detection Level (CDL) | 10 | % |
| Absolute Thermal Shutdown Junction Temperature (Tsd) | 160 | °C |
Key Features
- High Power Capability: Up to 32 W @ 3.2 Ω, 26 W @ 4 Ω, and 40 W EIAJ @ 13.7 V supply voltage.
- 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: CMOS compatible with programmable turn-on/off delay and no audible pop during mute and standby operations.
- Protection Features: Short circuit protection (to GND, to VS, across the load), very inductive loads, chip over temperature, load dump, open GND, and ESD protection.
- Clipping Detection: On-board clipping detector with a diagnostic circuitry to detect clipping in the output signal.
Applications
The TDA7391PDUTR is primarily designed for high-power car radio applications, including boosters and high-end car audio equipment. Its robust features and protections make it suitable for demanding automotive audio systems.
Q & A
- What is the maximum output power of the TDA7391PDUTR?
The maximum output power is up to 32 W @ 3.2 Ω, 26 W @ 4 Ω, and 40 W EIAJ @ 13.7 V supply voltage.
- What types of input signals can the TDA7391PDUTR accept?
The amplifier accepts both single-ended and differential input signals.
- Does the TDA7391PDUTR require external bootstrap capacitors or Boucherot cells?
No, it does not require these components due to its internal fixed gain configuration.
- What are the key protection features of the TDA7391PDUTR?
The key protection features include short circuit protection, very inductive loads protection, chip over temperature protection, load dump protection, open GND protection, and ESD protection.
- How does the standby function work on the TDA7391PDUTR?
The standby function is CMOS compatible with a programmable turn-on/off delay, ensuring no audible pop during mute and standby operations.
- What is the clipping detection feature of the TDA7391PDUTR?
The on-board clipping detector provides a diagnostic circuitry to detect clipping in the output signal with a 10% distortion level.
- What is the thermal shutdown junction temperature of the TDA7391PDUTR?
The absolute thermal shutdown junction temperature is 160 °C.
- What is the input impedance of the TDA7391PDUTR?
The input impedance is 36 - 60 kΩ for differential inputs and 30 - 55 kΩ for single-ended inputs.
- What is the common mode rejection ratio (CMRR) of the TDA7391PDUTR?
The CMRR is 65 dB at 1 kHz with a 1 Vrms input.
- What is the supply voltage rejection ratio (SVR) of the TDA7391PDUTR?
The SVR is 60 dB with a 1 Vrms voltage rejection.
