TDA7851PDTR

Overview

The TDA7851PDTR is a Class-AB audio power amplifier manufactured by STMicroelectronics, designed for high-power car radio applications. It utilizes fully complementary P-Channel/N-Channel MOSFET output structures to enable rail-to-rail output voltage swing. The device provides four channels of amplification with an output power capability of up to 48 W per channel into a 4 Ω load. It operates within a supply voltage range of 8 V to 18 V and supports a minimum operating temperature of -55 °C and a maximum of +150 °C.

Feature Summary

• Fully complementary P-Channel/N-Channel output structure enabling rail-to-rail output voltage swing
• Multipower BCD technology providing high output power capability and excellent driving performance
• Automotive qualification compliant with AEC-Q101 standards

Applications

• High-power car radio systems
• Automotive audio amplifier designs requiring robust thermal and electrical protection

Procurement Notes

Verify the specific suffix 'PDTR' indicates tape-and-reel packaging when sourcing components. Confirm that the AEC-Q101 automotive qualification aligns with your project's reliability requirements. Ensure the through-hole Flexiwatt package type matches your PCB layout constraints before finalizing procurement decisions.

Selection Notes

Select this component for designs requiring high-efficiency Class-AB amplification in automotive environments. The integrated protections against short circuits, overtemperature, and reversed battery polarity simplify system design. Consider the 26 dB internal gain and lack of external compensation needs when evaluating circuit complexity.

Part Context

This part belongs to the TDA7851 series of quad bridge power amplifiers from STMicroelectronics. It shares core architectural features with variants like the TDA7851A but differs in packaging and specific automotive qualification levels. The series is engineered to deliver high fidelity and power density for modern vehicle infotainment systems.

Replacement Considerations

The TDA7851A is a related variant within the same product family offering similar amplification characteristics. Verify pinout compatibility and package dimensions before substituting, as differences in mounting style or thermal management requirements may exist between the PDTR and other series members.