Automotive four-channel class-D amp with load dump protection
Texas Instruments’ TAS5414C is a four-channel Class-D audio amplifier designed for use in automotive head units and external amplifier modules. It provides four channels at 23W continuously into 4ohm at less than 1% THD+N from a 14.4V supply. Each channel can also deliver 38W into 2ohm at 1% THD+N. The device uses single-ended analog inputs. The class-D PWM topology of the device provides dramatic improvements in efficiency over traditional linear amplifier solutions. This reduces the power dissipated by the amplifier by a factor of ten under typical music playback conditions.
The device has a built-in load diagnostic functions for detecting and diagnosing misconnected outputs to help to reduce test time during the manufacturing process.