The parallel amplifier is another configuration that can be used to obtain higher output power levels by combining two IC outputs and doubling output current drive capability. The parallel topology provides a great way of achieving higher power levels while keeping within IC power dissipation limits by driving low impedance loads, which is the case for many self-powered speaker and powered subwoo…

The LM4667 is a fully integrated 1.3W, single-supply high efficiency (Class D) switching audio amplifier. It features an innovative modulator that eliminates the LC output filter used with typical switching amplifiers.

The SSM2305 is a fully integrated, single-chip, mono Class-D audio amplifier that is designed to maximize performance for mobile phone applications. The application circuit operates from a single 2.5 V to 5.5 V supply and is capable of delivering 2.8 W of continuous output power with less than 10% THD + N driving a 4 Ω load from a single 5.0 V supply.

This evaluation board is designed with the TS4994 low power differential audio amplifier. The micro-package DFN10 (dual flat non-leaded 10 pins) allows space saving and good thermal dissipation. The differential gain is set at 1 V/V and can be adapted as necessary through a modification of the R1 to R4 values.

The TPA3007D1 is a 6.5-W mono bridge-tied load (BTL) class-D audio power amplifier with high efficiency, eliminating the need for heat sinks. The TPA3007D1 can drive 8Ω speakers with only a ferrite bead filter required to reduce EMI.

The MAX98400B evaluation kit (EV kit) configures the MAX98400B Class D amplifier to drive 2x12W into a pair of 8Ω speakers in stereo mode for audio applications.

The IRAUDAMP16 reference design is a two-channel, 70W/ch (4Ω ±23V; no heatsink)/ 130 W/ch (4 Ω/±31 V; with heatsink) half-bridge Class D audio power amplifier.

The IRAUDAMP6 reference design is a two-channel, 250W/ch (8Ω) load half-bridge Class D audio power amplifier. This reference design demonstrates how to use the IRS20957S Class D audio controller and gate driver IC, implement protection circuits, and design an optimum PCB layout using the IRF6785 DirectFET MOSFETs.

The STEVAL-CCA030V1 demonstration board is based on the STA350BW Sound Terminal digital amplifier and is an integrated solution for digital audio processing, digital amplifier control and FFX®-power output stage.

The STEVAL-CCA030V1 is made up of two boards: STA350BW to evaluate the device and APWLink (STEVAL- CCA035V1) used as I2S and I2C interface.

The STEVAL-CCA029V1 is a demonstration board designed for the TDA7491LP dual BTL class-D audio amplifier. This application note provides the board specifications and a quick-start list for stand-alone operation. Also included are the schematic, printed circuit board layout and bill of material.