Overview
The TDA7850AH, produced by STMicroelectronics, is a high-performance MOSFET technology class AB audio power amplifier. Designed in the Flexiwatt 25 package, this quad bridge power amplifier is specifically tailored for high-power car audio systems. It offers exceptional output power capability, excellent distortion characteristics, and a range of protective features, making it an ideal choice for automotive audio applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Supply Voltage (VS) | 18 | V |
| DC Supply Voltage (VS DC) | 28 | V |
| Peak Supply Voltage (VS pk) | 50 | V (for t = 50 ms) |
| Output Peak Current (IO) | 9 A (repetitive), 10 A (non-repetitive) | A |
| Power Dissipation (Ptot) | 80 | W (at Tcase = 70 °C) |
| Junction Temperature (Tj) | 150 | °C |
| Storage Temperature (Tstg) | -55 to 150 | °C |
| Output Power (4 Ω, 1 kHz, 10% THD) | 4 x 30 W | W |
| Output Power (2 Ω, 1 kHz, 10% THD) | 4 x 55 W | W |
Key Features
- High output power capability: up to 4 x 50 W/4 Ω and 4 x 80 W/2 Ω.
- MOSFET output power stage for high efficiency and reliability.
- Excellent 2 Ω driving capability.
- Hi-Fi class distortion for high-quality audio.
- Low output noise.
- Standby (ST-BY) and mute functions.
- Automute at minimum supply voltage detection.
- Low external component count: internally fixed gain (26 dB), no external compensation, and no bootstrap capacitors.
- On-board 0.35 A high side driver.
- Comprehensive protection features including output short circuit, overrating chip temperature with soft thermal limiter, output DC offset detection, load dump voltage, and reversed battery protection.
Applications
The TDA7850AH is primarily designed for high-power car audio systems. Its robust features and high output power make it suitable for a variety of automotive audio applications, including car stereos, amplifiers, and sound systems that require high-quality audio performance and reliability.
Q & A
- What is the maximum output power of the TDA7850AH at 4 Ω? The maximum output power is 4 x 50 W at 4 Ω.
- What is the maximum output power of the TDA7850AH at 2 Ω? The maximum output power is 4 x 80 W at 2 Ω.
- What is the operating supply voltage range for the TDA7850AH? The operating supply voltage range is up to 18 V DC.
- Does the TDA7850AH have built-in protection features? Yes, it includes protections such as output short circuit, overrating chip temperature, output DC offset detection, load dump voltage, and reversed battery protection.
- What is the thermal resistance junction to case for the TDA7850AH? The thermal resistance junction to case is maximum 1 °C/W.
- Does the TDA7850AH support standby and mute functions? Yes, it supports both standby (ST-BY) and mute functions.
- What is the storage temperature range for the TDA7850AH? The storage temperature range is -55 to 150 °C.
- Is the TDA7850AH designed for high external component count? No, it has a low external component count with internally fixed gain and no external compensation or bootstrap capacitors.
- What is the junction temperature limit for the TDA7850AH? The junction temperature limit is 150 °C.
- What type of output stage does the TDA7850AH use? The TDA7850AH uses a MOSFET output power stage.
