1 Features

1• 10-W into an 8-Ω Load at 10% THD+N From a

12-V Supply

• 7-W into an 4-Ω Load at 10% THD+N From a 8-V

Supply

• 94% Efficient Class-D Operation into 8-Ω Load

Eliminates Need for Heat Sinks

• Wide Supply Voltage Range Allows Operation

from 8 to 26 V

• Filter-Free Operation

• SpeakerGuard™ Speaker Protection Includes

Adjustable Power Limiter Plus DC Protection

• Flow-Through Pinout Facilitates Easy Board

Layout

• Robust Pin-to-Pin Short-Circuit Protection and

Thermal Protection With Auto-Recovery Option

• Excellent THD+N and Pop-Free Performance

• Four Selectable, Fixed Gain Settings

• Differential Inputs

2 Applications

• Televisions

• Monitors and Laptops

• Consumer Audio Equipment

3 Description

The TPA3111D1 device is a 10-W, efficient, Class-D

audio power amplifier for driving a bridge tied

speaker. Advanced EMI suppression technology

enables the use of inexpensive ferrite bead filters at

the outputs while meeting EMC requirements.

SpeakerGuard speaker protection system includes an

adjustable power limiter and a DC detection circuit.

The adjustable power limiter lets the user to set a

virtual voltage rail lower than the chip supply to limit

the current through the speaker. The DC Detect

circuit measures the frequency and amplitude of the

PWM signal and shuts off the output stage if the input

capacitors are damaged or shorts exist on the inputs.

The TPA3111D1 can drive a mono speaker as low as

4 Ω. The high efficiency of the TPA3111D1, >90%,

eliminates the requirement for an external heat sink

when playing music.

The outputs are fully protected against shorts to

GND, VCC, and output-to-output. The short-circuit

protection and thermal protection includes an autorecovery

feature.