Overview
The TDA7396 is a high-power class AB audio power amplifier designed by STMicroelectronics, specifically intended for car radio and high-power audio applications. This amplifier is notable for its bridge configuration, allowing it to drive loads as low as 2Ω. It features a fully complementary output stage and internally fixed gain, which minimizes the need for external components. The TDA7396 also includes advanced diagnostic facilities, thermal protection, and standby functions, making it a robust and reliable choice for automotive audio systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Power (RL = 2Ω, VS = 14.4V, f = 1kHz, d = 10%) | 45 | W |
| Output Power (EIAJ, VS = 13.7V) | 60 | W |
| Supply Voltage Range | 8 - 18 | V |
| Peak Supply Voltage (t = 50ms) | 50 | V |
| Total Quiescent Current | 100 | mA |
| Output Offset Voltage | 150 | mV |
| High Frequency Rolloff (PO = 1W, -3dB) | 75 | kHz |
| Input Impedance (Differential) | 60 | kΩ |
| Input Impedance (Single Ended) | 55 | kΩ |
| Thermal Resistance Junction-case | 1.5 | °C/W |
| Absolute Thermal Shutdown Junction Temperature | 160 | °C |
Key Features
- Differential or Single-Ended Input Mode: The amplifier can operate in either differential or single-ended input mode, making it versatile for various applications.
- Diagnostic Facilities: Includes clipping detection, thermal shutdown, short-circuit protection (to GND, to VS, across the load), and open load detection.
- Standby Function: Features a standby mode that shuts down internal bias supplies, reducing power consumption to a few microamperes.
- Automatic Mute: Provides automatic mute during turn-on and turn-off to prevent noisy transients.
- Thermal Protection: Implements thermal foldback and absolute thermal shutdown to protect the device from overheating.
- No External Compensation Needed: The amplifier does not require bootstrap capacitors or external compensation, simplifying the circuit design.
Applications
The TDA7396 is primarily designed for high-power car radio applications and can also be used in other automotive audio systems where high power and reliability are required. Its robust diagnostic and protection features make it suitable for demanding environments.
Q & A
- What is the maximum output power of the TDA7396 at 2Ω load?
The maximum output power is 45W at 2Ω load with a supply voltage of 14.4V and a distortion of 10%. - What are the diagnostic facilities provided by the TDA7396?
The TDA7396 includes diagnostic facilities for clipping detection, thermal shutdown, short-circuit protection, and open load detection. - What is the standby current of the TDA7396?
The standby current is in the range of a few microamperes when the ST-BY input is low. - Does the TDA7396 require external bootstrap capacitors?
No, the TDA7396 does not require external bootstrap capacitors or Boucherot cells. - What is the thermal shutdown temperature of the TDA7396?
The absolute thermal shutdown temperature is 160°C. - Can the TDA7396 operate in both differential and single-ended input modes?
Yes, the TDA7396 can operate in both differential and single-ended input modes. - What is the input impedance of the TDA7396 in differential mode?
The input impedance in differential mode is 60 kΩ. - Does the TDA7396 have automatic mute functionality?
Yes, the TDA7396 provides automatic mute during turn-on and turn-off to prevent noisy transients. - What is the high frequency rolloff of the TDA7396?
The high frequency rolloff is 75 kHz at an output power of 1W and -3dB. - What is the supply voltage range for the TDA7396?
The supply voltage range is from 8V to 18V.
