Overview
The TDA7376B is a dual bridge audio amplifier designed by STMicroelectronics, specifically tailored for car radio applications. It is packaged in a Multiwatt 15 format and features a fully complementary PNP/NPN output stage configuration, enabling a rail-to-rail voltage swing without the need for bootstrap capacitors. This amplifier is known for its high output power capability, differential input pairs, and minimal external component requirements, making it suitable for both car radio and car boosters applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Supply Voltage (VOP) | 18 | V |
| DC Supply Voltage (Vs) | 28 | V |
| Peak Supply Voltage (Vpeak) | 50 | V (t = 50 ms) |
| Output Peak Current (not repetitive) | 8 | A (t = 100 μs) |
| Output Peak Current (repetitive) | 6 | A (f > 10 Hz) |
| Power Dissipation (Ptot) | 36 | W (Tcase = 85 °C) |
| Storage and Junction Temperature (Tstg, Tj) | -40 to 150 | °C |
| Operative Ambient Temperature Range (Tamb) | -40 to 105 | °C |
| Thermal Resistance Junction to Case (Rth j-case) | 1.8 | °C/W |
| Supply Voltage Range (VS) | 8 to 18 | V |
| Total Quiescent Drain Current (Id) | 200 | mA |
| Output Offset Voltage (VOS) | 120 | mV |
| Output Power (PO) at 4 Ω, THD = 10% | 25 to 35 | W |
| Output Power (PO) at 2 Ω, THD = 10% | 25 | W |
| Distortion (THD) at PO = 0.5 to 10 W | 0.03 to 0.08 | % |
Key Features
- High Output Power Capability: Up to 2 x 40 W max./ 4 Ω and 2 x 35 W/4 Ω EIAJ.
- 2 Ω Driving Capability: Can drive loads as low as 2 Ω.
- Differential Inputs: Accepts both single-ended and differential input signals, ensuring high noise immunity.
- Minimum External Components Count: Reduces the complexity of the circuit design.
- Internally Fixed Gain (26 dB): Simplifies the design process.
- Mute Function (CMOS Compatible): Attenuates the output signal to suppress pop On-Off transients and noise.
- Standby Function: De-biases the amplifiers to reduce power consumption.
- No Audible Pop During Mute and Standby Operations: Ensures smooth operation.
- Clipping Detector with Programmable Distortion Threshold: Limits distortion when the amplifier is overdriven.
- Protections: Includes short circuit, overrating chip temperature with soft thermal limiter, load dump voltage, fortuitous open ground, loudspeaker DC current, and ESD protections.
Applications
The TDA7376B is primarily designed for car radio applications but is also suitable for car boosters and other automotive audio systems where high output power and low distortion are required.
Q & A
- What is the maximum output power of the TDA7376B?
The TDA7376B can deliver up to 2 x 40 W max./ 4 Ω and 2 x 35 W/4 Ω EIAJ.
- What type of input signals does the TDA7376B accept?
The TDA7376B accepts both single-ended and differential input signals.
- Does the TDA7376B have built-in protection features?
Yes, it includes protections such as short circuit, overrating chip temperature with soft thermal limiter, load dump voltage, fortuitous open ground, loudspeaker DC current, and ESD protections.
- How does the mute function work on the TDA7376B?
The mute function attenuates the output signal to suppress pop On-Off transients and noise, and it is CMOS compatible.
- What is the standby function of the TDA7376B?
The standby function de-biases the amplifiers to reduce power consumption.
- Can the TDA7376B drive 2 Ω loads?
Yes, the TDA7376B can drive loads as low as 2 Ω.
- What is the thermal resistance junction to case of the TDA7376B?
The thermal resistance junction to case (Rth j-case) is 1.8 °C/W.
- What is the operating temperature range of the TDA7376B?
The operative ambient temperature range is -40 to 105 °C.
- Does the TDA7376B have a programmable distortion detector?
Yes, it has a programmable clipping distortion detector that signals output stage saturation.
- What is the typical quiescent drain current of the TDA7376B?
The total quiescent drain current (Id) is typically 200 mA.
