Overview
The TDA7391PDU, produced by STMicroelectronics, is a bridge class AB audio power amplifier specifically designed for high-power car radio applications. This amplifier is known for its high power capability, making it suitable for boosters and high-end car radio equipment. It features a fully complementary output stage and an internal fixed gain configuration, which reduces the need for external components. The TDA7391PDU also includes a standby function, programmable turn-on/off delay, and no audible pop during mute and standby operations.
Key Specifications
| Parameter | Test Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| VS (Supply Voltage Range) | - | 8 | - | 18 | V |
| PO (Output Power) @ RL = 4 Ω, d = 10% | - | - | 26 | W | |
| PO (Output Power) @ RL = 3.2 Ω, d = 10% | - | - | 32 | W | |
| PO EIAJ (EIAJ Output Power) @ VS = 13.7 V | - | - | 40 | W | |
| Iq (Total Quiescent Current) | - | - | 60 | 150 | mA |
| VOS (Output Offset Voltage) | - | - | 120 | mV | |
| ISB (Standby Current) @ VST-BY = 1.5 V | - | - | 100 | μA | |
| Tsd (Absolute Thermal Shutdown Junction Temperature) | - | - | 160 | °C | |
| Rth j-case (Thermal Resistance Junction-to-Case) | - | - | 2 | °C/W |
Key Features
- High power capability: up to 32 W @ 3.2 Ω and 26 W @ 4 Ω with VS = 14.4 V, f = 1 kHz, d = 10%.
- Differential inputs: accepts either single-ended or differential input signals.
- Minimum external component count: no bootstrap capacitors, no Boucherot cells, internally fixed gain (30 dB), and no SVR capacitor.
- Standby function: CMOS compatible with programmable turn-on/off delay.
- No audible pop during mute and standby operations.
- Comprehensive protection features: short circuit (to GND, to VS, across the load), 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 TDA7391PDU is specifically designed for high-power car radio applications, including boosters and high-end car radio equipment. Its robust features and protections make it an ideal choice for automotive audio systems where reliability and performance are critical.
Q & A
- What is the maximum output power of the TDA7391PDU at 3.2 Ω load?
The maximum output power at 3.2 Ω load is 32 W with VS = 14.4 V, f = 1 kHz, and d = 10%.
- What is the supply voltage range for the TDA7391PDU?
The supply voltage range is from 8 V to 18 V.
- Does the TDA7391PDU have a standby function?
Yes, it has a CMOS compatible standby function with programmable turn-on/off delay.
- What kind of input signals does the TDA7391PDU accept?
The TDA7391PDU accepts both single-ended and differential input signals.
- What is the thermal shutdown junction temperature for the TDA7391PDU?
The absolute thermal shutdown junction temperature is 160 °C.
- Does the TDA7391PDU have any protection features?
Yes, it includes protections for short circuits, very inductive loads, chip over temperature, load dump, open GND, and ESD.
- What is the typical quiescent current of the TDA7391PDU?
The typical quiescent current is between 60 mA and 150 mA.
- How does the TDA7391PDU handle clipping detection?
The TDA7391PDU has an on-board clipping detector that gives out a low-level signal during clipping (distortion = 10%).
- What is the package type for the TDA7391PDU?
The TDA7391PDU is available in PowerSO20 (slug-up) packages.
- Does the TDA7391PDU produce any audible pop during mute and standby operations?
No, the TDA7391PDU does not produce any audible pop during mute and standby operations).
