Overview
The TDA7267A is a mono audio amplifier integrated circuit produced by STMicroelectronics. It is designed for high-performance audio applications, particularly in TV systems. This device features advanced diagnostics, high PWM switching frequency, and high-resolution audio capabilities. The TDA7267A is packaged in a PowerDIP 8+8 configuration, making it suitable for a variety of audio amplification needs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Supply Voltage (VS) | 5 - 18 | V |
| Output Peak Current (IO) | 1.5 | A |
| Operating Temperature Range (Top) | 0 to 70 | °C |
| Junction Temperature (Tj) | 150 | °C |
| Storage Temperature Range (Tstg) | -40 to 125 | °C |
| Quiescent Current (IS) | 23 - 35 | mA |
| Stand-By Current (Isb) | 0.3 | mA |
| Voltage Gain (AV) | 31 - 33 | dB |
| Input Impedance (RIN) | 50 - 100 | KΩ |
| Output Power (PO) at THD = 10% | 2.7 - 3 | W |
| Distortion (THD) at PO = 1W | 0.1 - 0.3 | % |
| Supply Voltage Rejection (SVR) | 50 | dB |
| Input Noise Voltage (EI) | 5 - 10 | µV |
Key Features
- High Output Power: The TDA7267A can deliver up to 3W of output power with a THD of 10% at 14.5V and 8Ω load.
- Internal Fixed Gain: The device has an internal fixed gain of 32dB, eliminating the need for external gain-setting components.
- No Feedback Capacitor or Boucherot Cell: Simplifies the circuit design and reduces component count.
- Thermal Protection: Built-in thermal protection to prevent overheating and ensure reliable operation.
- AC Short Circuit Protection: Protects the device from short circuits and ensures safe operation.
- Low Turn-On/Off Pop: Minimizes audible noise during power-on and power-off cycles.
- Stand-By Mode: Low current consumption in stand-by mode, suitable for power-saving applications.
- Supply Voltage Rejection (SVR): High SVR of 50 dB for better ripple rejection.
Applications
The TDA7267A is specifically designed for TV applications but can also be used in various other audio systems requiring high-quality mono audio amplification. It is suitable for use in:
- TV sets and monitors
- Audio equipment and speakers
- Automotive audio systems
- Consumer electronics requiring mono audio amplification
Q & A
- What is the maximum output power of the TDA7267A?
The TDA7267A can deliver up to 3W of output power with a THD of 10% at 14.5V and 8Ω load.
- What is the internal fixed gain of the TDA7267A?
The device has an internal fixed gain of 32dB.
- Does the TDA7267A require a feedback capacitor or Boucherot cell?
No, the TDA7267A does not require a feedback capacitor or Boucherot cell.
- What kind of protection features does the TDA7267A have?
The TDA7267A has thermal protection and AC short circuit protection.
- What is the quiescent current of the TDA7267A?
The quiescent current (IS) is between 23 and 35 mA.
- What is the stand-by current of the TDA7267A?
The stand-by current (Isb) is approximately 0.3 mA.
- What is the input impedance of the TDA7267A?
The input impedance (RIN) is between 50 and 100 KΩ.
- What is the supply voltage rejection (SVR) of the TDA7267A?
The SVR is 50 dB.
- What are the typical applications of the TDA7267A?
The TDA7267A is typically used in TV sets, audio equipment, automotive audio systems, and other consumer electronics requiring mono audio amplification.
- How does the TDA7267A handle thermal management?
The device requires external heat sinking, and the thermal resistance junction to ambient is about 70°C/W. It can use the Cu ground plane of the PCB as a heat dissipating means.
