Description:

The TPA3111D1-Q1 device is a 10W high-efficiency Class-D audio power amplifier for driving a bridged-tied speaker. Advanced EMI suppression technology enables the use of inexpensive ferrite bead filters at the output while meeting EMC requirements. The SpeakerGuard™ protection circuitry includes an adjustable power limiter and a DC detection circuit. The adjustable power limiter allows the user to set a virtual voltage rail below the chip supply voltage to limit the power delivered through the speaker. The DC detection circuit measures the frequency and amplitude of the PWM signal and shuts down the output stage if the input capacitors are damaged or a short circuit exists at the inputs. The TPA3111D1-Q1 can drive a mono speaker as low as 4Ω. With greater than 90% efficiency during music playback, the TPA3111D1-Q1 eliminates the need for an external heat sink. The output is fully protected against short circuits to GND, VCC, and output-to-output. Both short-circuit and thermal protection include auto-recovery functionality.

Features:

• Qualified for automotive applications

• AEC-Q100 qualified with the following results:

– Device temperature grade 1: –40°C to +125°C ambient operating temperature range

– Device HBM ESD classification level H2

– Device CDM ESD classification level C2

• 10W into 8Ω at 10% THD+N from a 12V supply

• 7W into 4Ω at 10% THD+N from an 8V supply

• 94% efficient Class-D operation into 8Ω eliminates need for heat sink

• Wide supply voltage range allows operation from 8V to 26V

• Filter-free operation

• SpeakerGuard™ speaker protection includes adjustable power limiter and DC protection

• Flow-through pinout simplifies board layout

• Robust pin-to-pin short-circuit and thermal protection with auto-recovery option

• Excellent THD+N and pop-free performance

• Four selectable fixed gain settings

• Differential inputs

Applications:

• Automotive noise generation for hybrid/electric vehicles (HEV/EV)

• Automotive eCall systems

• Automotive infotainment systems (head units, instrument clusters, telematics, navigation)

• Automotive connectivity gateways

• Professional audio equipment (PA speakers, studio headphones, high-performance amplifiers, advanced microphones)

• Aerospace and defense audio systems