STMicroelectronics TDA7851L Audio Power Amplifier 75W 4-Channel AB Flexiwatt

The STMicroelectronics TDA7851L is a high-performance class AB audio power amplifier built on breakthrough MOSFET technology, designed for powerful car radio applications. Housed in a space-saving Flexiwatt25 package, this integrated circuit delivers exceptional audio quality with Hi-Fi class distortion and low output noise, making it ideal for premium in-car entertainment systems.

The fully complementary P-Channel/N-Channel output structure enables a rail-to-rail output voltage swing, which combined with high output current and minimised saturation losses, sets new power reference points in the car-radio field. This design achieves unparalleled distortion performance and delivers a robust 75W per channel across four channels into a 2 Ohm load, with excellent 2 Ohm driving capability.

This amplifier includes essential functions for modern car audio systems, such as standby and mute functions, plus an automute feature that activates at minimum supply voltage detection, ensuring reliable operation and protection. It supports a wide supply voltage range from 8V to 18V and operates over a temperature range of -40°C to 105°C, making it suitable for demanding automotive environments.

With through-hole mounting for straightforward PCB integration, this 25-pin Flexiwatt package is engineered for durability and performance, delivering a superior listening experience with minimal distortion and noise.

Key Features

• MOSFET output power stage
• Excellent 2 Ohm driving capability
• Hi-Fi class distortion
• Low output noise
• Standby function
• Mute function
• Automute at minimum supply voltage detection

Technical Specifications

• Output Power: 75W x 4 channels @ 2 Ohm
• Audio Amplifier Type: Class AB
• No. of Channels: 4 Channels
• Supply Voltage Range: 8V to 18V
• IC Case / Package: Flexiwatt (25 pins)
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