Overview
The TDA7851L is a class AB audio power amplifier developed by STMicroelectronics, utilizing breakthrough MOSFET technology. It is packaged in the Flexiwatt25 format, specifically designed for high-power car radio applications. This amplifier features a fully complementary P-Channel/N-Channel output structure, enabling a rail-to-rail output voltage swing, high output current, and minimized saturation losses. This design sets new power and distortion performance standards in the car-radio field.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Power (VS = 14.4 V, THD = 10%, RL = 4 Ω) | 28 | W |
| Output Power (VS = 14.4 V, THD = 10%, RL = 2 Ω) | 48 | W |
| Supply Voltage Range | 8 - 18 | V |
| Quiescent Current (RL = ∞) | 100 - 150 - 300 | mA |
| Output Offset Voltage (Play mode / Mute mode) | -60 to +60 | mV |
| Voltage Gain | 25 - 26 - 27 | dB |
| Channel Gain Unbalance | ±1 | dB |
| Operating Temperature Range | -40 to 105 | °C |
| Storage Temperature Range | -55 to 150 | °C |
| Junction Temperature | 150 | °C |
| Thermal Resistance (junction-to-case) | 1 | °C/W |
Key Features
- MOSFET output power stage
- Excellent 2 Ω driving capability
- Hi-Fi class distortion
- Low output noise
- Standby function
- Mute function
- Automute at minimum supply voltage detection
- Low external component count: internally fixed gain (26 dB), no external compensation, and no bootstrap capacitors
- Protections: output short circuit to GND, to VS, across the load, very inductive loads, overrating chip temperature with soft thermal limiter, load dump voltage, fortuitous open GND, and reversed battery
- ESD protection
Applications
The TDA7851L is primarily designed for high-power car radio applications. Its features and specifications make it suitable for use in automotive audio systems where high output power, low distortion, and robust protection mechanisms are required.
Q & A
- What is the TDA7851L?
The TDA7851L is a class AB audio power amplifier using MOSFET technology, designed for high-power car radio applications. - What is the output power of the TDA7851L?
The output power is up to 28 W per channel at 4 Ω and up to 48 W per channel at 2 Ω with a THD of 10%. - What is the supply voltage range for the TDA7851L?
The supply voltage range is from 8 V to 18 V. - What are the key features of the TDA7851L?
Key features include MOSFET output stage, excellent 2 Ω driving capability, Hi-Fi class distortion, low output noise, standby and mute functions, and various protection mechanisms. - What type of package does the TDA7851L use?
The TDA7851L is packaged in the Flexiwatt25 format. - What are the operating and storage temperature ranges for the TDA7851L?
The operating temperature range is -40°C to 105°C, and the storage temperature range is -55°C to 150°C. - Does the TDA7851L have built-in protection mechanisms?
Yes, it includes protections such as output short circuit, overrating chip temperature, load dump voltage, fortuitous open GND, and reversed battery, as well as ESD protection. - What is the thermal resistance of the TDA7851L?
The thermal resistance (junction-to-case) is 1 °C/W. - Is the TDA7851L suitable for automotive applications?
Yes, it is specifically designed for high-power car radio applications. - What is the quiescent current of the TDA7851L?
The quiescent current ranges from 100 mA to 300 mA.
