Class D (car radio) audio amplifiers

Our class-D amplifiers bring size and power advantages to in-car entertainment

Delivering up to 2 x 135 W into 4 Ohm loads, NXP's Class-D car-audio amplifiers have extremely high dynamic audio range for maximum listening enjoyment on the move. Improving amplifier efficiency also helps designers manage in-car energy consumption as more and more features are added to deliver enhanced passenger experiences.

Combining high audio quality with significantly reduced heat dissipation in the vehicle head unit, compared to traditional Class-AB amplifiers, our Class-D car radio audio amplifiers simplify thermal management, thereby trimming size and cost from high-power car audio systems.

The family comprises the TDF8599A and TDF8599B, each featuring dual Bridge-Tied Load (BTL) outputs comprising a dual NDMOS-transistor output stage based on Silicon-On-Insulator (SOI) BCD MOS technology. Both devices include an I2C interface with support for up to 15 bus addresses. Operating in I2C-bus mode provides access to DC-load detection, frequency hopping, extended configuration functions and enhanced diagnostic information. Both ICs can also operate in non-I2C mode (Legacy Mode).

Further built-in features include load-dump protection and voltage stabilizers, which simplify integration into the vehicle's electrical system to enable shorter design-in cycles and reduced system cost.