By integrating an advanced 32-step up/down volume control, the PAM8407 Class D audio amplifier from Diodes Incorporated has enabled a reduction in the component count in a variety of stereo speaker applications, including PCs, docking stations and wireless speakers.
Able to drive dual 4O speakers at 3W per channel, from a 5V 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 2.5V and 6V 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.