Power Electronics
Class D Audio Amplifier Reduces Component Count

Class D Audio Amplifier Reduces Component Count

Integrating an advanced 32-step up/down volume control, the PAM8407 Class D audio amplifier from Diodes Incorporated enables a reduction in component count in a variety of stereo speaker applications, including PCs, docking stations and wireless speakers.

Able to drive dual 4-Ohm speakers at 3 W per channel, from a 5 V supply, the amplifier provides designers with simple two key up/down volume control and high-quality sound reproduction.  With its fully differential inputs, the device ensures low noise, high PSRR and solid THD+N performance.

The Class D amplifier's filter-less output architecture also saves space by minimizing the number of external components, while also ensuring a lower quiescent current and improved EMI performance.

With its low pin count SO-16 packaging, small external circuit requirement and an efficiency of 87%, the PAM8407 is particularly appropriate for portable applications.  The wide operating voltage range of 2.5 V and 6 V makes it especially well-suited for a 4x alkaline cell configuration.

The amplifier incorporates a range of safeguards to protect it from damage.  These include auto-recovery short-circuit protection, under-voltage lockout and over-temperature protection.

The PAM8407 stereo Class D audio amplifier from Diodes Incorporated is priced at $0.18 USD each in 100k piece order quantities.

 

 

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