Small form, big sound

Today’s audio amplification technologies need to support portable equipment and audio component designs. While enabling miniaturized devices, they have to maximize the effect of small form factor speakers to generate a big, high quality sound. Excellent EMC performance is a must especially for applications in noisy environments, always ensuring distortion free listening.

Amplifier Class Typical Efficiency Pros Cons
A ~15-35% No possibility of crossover distortion Inefficiency = heat
Single-ended designs prone to hum and higher levels of distortion.
B ~70% Relatively high efficiency Potential for significant amounts of crossover distortion and compromised fidelity
AB ~50-70% More efficient than Class-A
Relatively Inexpensive
Crossover distortion can be rendered moot.
Efficiency is good, but not great.
G & H ~50-70% Improved efficiency over Class-AB Costlier than Class-AB but higher power levels are achievable in a smaller form factor.
D >90% Most possible efficiency Light weight Pulse width modulators operating at relatively low frequencies can compromise high frequency audio reproduction.
Some designs produce varying sound quality depending on speaker load.

Ahead of its time

Whether it’s home theatre, sound bars or the entertainment system in your vehicle, audio reproduction is being influenced by several trends. More channels are used per unit, more integrated sound processing features, and there is the continual drive towards increased efficiency.

These trends affect the choice of amplifier and how the circuit is designed. Through our deep understanding we have evolved our innovative audio amplification technologies so your systems can meet these increasing needs.

CES 2013: Intelligent Audio Amplifier Saves Power (TDF8530 Class-D Demo)

NXP audio system TFA9887

NXP audio system TFA9887 with adaptive sound maximizer and speaker protection