Overview
The TDA7375V, produced by STMicroelectronics, is a high-performance class AB car radio amplifier designed to operate in either DUAL BRIDGE or QUAD SINGLE ENDED configurations. This amplifier is engineered with advanced technology to provide high output power capabilities and minimal external component requirements. It features an internally fixed gain, silent turn-on/off, and comprehensive diagnostic facilities, making it an ideal choice for various automotive audio applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Supply Voltage (Vop) | 8 - 18 | V |
| Peak Supply Voltage (Vpeak) | 50 | V (for t = 50ms) |
| Output Peak Current (IO) | 4.5 A (not repetitive, t = 100μs) | A |
| Output Peak Current (IO) | 3.5 A (repetitive, f > 10Hz) | A |
| Power Dissipation (Ptot) | 36 W (Tcase = 85°C) | W |
| Storage and Junction Temperature (Tstg, Tj) | -40 to 150 °C | °C |
| Thermal Resistance Junction-case (Rth j-case) | 1.8 °C/W | °C/W |
| Output Power (PO) - EIAJ | 2 x 35W/4Ω @14.4V, 1KHz, 10% | W |
| Output Power (PO) - Bridge | 2 x 40W/4Ω @14.4V, 1KHz, 10% | W |
| Distortion (THD) | 0.02 - 0.3 % @ RL = 4Ω, PO = 0.1 to 10W | % |
| Cross Talk (CT) | 55 - 70 dB @ f = 1KHz to 10KHz | dB |
| Voltage Gain (GV) | 19 - 27 dB | dB |
Key Features
- High Output Power Capability: Up to 2 x 40W in bridge configuration and 2 x 35W in single-ended configuration.
- Minimum External Components: No bootstrap capacitors, no Boucherot cells, and internally fixed gain.
- Stand-by Function: CMOS compatible with silent turn-on/off and muting/stand-by function.
- Diagnostics Facility: Detects clipping, thermal shutdown, and output faults such as short to GND, VS, and soft short at turn-on.
- Thermal Protection: Includes thermal shutdown and soft thermal limiter.
- Output Stage: Fully complementary output stage with rail-to-rail output voltage swing and built-in protection against various short circuits.
- Easy Configuration Transition: Simple transition from single-ended to bridge configurations without additional external components.
Applications
The TDA7375V is designed for use in automotive audio systems, particularly in car radios. It supports various configurations such as 4-speaker stereo (front/rear) and 2-speaker bridge solutions. Its high application flexibility makes it suitable for a range of automotive audio applications where high power output and reliability are crucial.
Q & A
- What are the operating supply voltage ranges for the TDA7375V?
The operating supply voltage ranges from 8 to 18 volts.
- What is the maximum output power in bridge configuration?
The maximum output power in bridge configuration is up to 2 x 40W at 4Ω, 14.4V, 1KHz, and 10% THD.
- Does the TDA7375V require external bootstrap capacitors?
No, the TDA7375V does not require external bootstrap capacitors.
- How does the stand-by function work?
The stand-by function can be activated by a CMOS level applied to pin 7, and it completely turns off the device with minimal current consumption and high output attenuation.
- What types of faults can the diagnostic facility detect?
The diagnostic facility can detect clipping, thermal shutdown, and output faults such as short to GND, VS, and soft short at turn-on.
- How does the thermal protection work?
The thermal protection includes thermal shutdown and a soft thermal limiter to prevent overheating and ensure safe operation.
- What is the significance of the fully complementary output stage?
The fully complementary output stage allows for rail-to-rail output voltage swing without the need for bootstrap capacitors and provides built-in protection against various short circuits.
- How can the configuration be transitioned from single-ended to bridge?
The configuration can be transitioned from single-ended to bridge simply by short-circuiting across the inputs, without the need for additional external components.
- What are the key benefits of the internally fixed gain?
The internally fixed gain optimizes output noise, supply voltage rejection, and distortion, while also saving components and space.
- What is the importance of proper PCB grounding?
Proper PCB grounding is crucial to ensure that the power ground (P-GND) and signal ground (S-GND) leads are connected correctly to avoid any operational issues.
