PAM8407DR

Overview

The PAM8407DR is a stereo Class-D audio amplifier manufactured by Diodes Incorporated in an SO-16 package. It delivers 3W output at 10% THD with a 4Ω load and 5V supply, or 2.4W at 1% THD under the same conditions. The device operates on a 2.5V to 6.0V supply voltage with a quiescent current of 8mA. Key electrical parameters include a signal-to-noise ratio of 95dB, total harmonic distortion plus noise of 0.08%, and power supply ripple rejection of 70dB.

Feature Summary

• Features fully differential input architecture to minimize external components and reduce system noise.
• Includes integrated 32-step up/down volume control ranging from -80dB to 24dB gain.
• Utilizes filterless output design to lower electromagnetic interference and PCB area requirements.
• Built-in auto-recovery short circuit protection and thermal shutdown for enhanced reliability.

Applications

• PC Speakers
• Wireless Speakers
• Home Sound Systems
• Active Speakers
• Docking Stations

Procurement Notes

Verify component authenticity through authorized channels as datasheet revision DS36815 Rev. 2-3 indicates this part is not recommended for new designs. Confirm package type matches SO-16 specifications and check for moisture sensitivity handling requirements during storage and assembly processes.

Selection Notes

Select this component when designing portable audio systems requiring high efficiency and low quiescent current. Ensure the application supports differential inputs and utilizes a 2.5V to 6V power range. Consider the built-in volume control features if minimizing external logic components is a priority for the specific design constraints.

Part Context

This component belongs to the PAM8407 series of Class-D audio amplifiers produced by Diodes Incorporated. It is designed specifically for portable applications where battery life and sound quality are critical. The series emphasizes simplicity through its filterless architecture and integrated control features.

Replacement Considerations

The datasheet explicitly states that the PAM8407 is not recommended for new designs and recommends using the PAM8408 instead. Verify compatibility and updated specifications before transitioning to alternative models.

FAQ

What is the default gain setting upon power-on?

Upon device power-on or applying a logic low to the SD pin, the amplifier's gain is set to a default value of 12dB.

How does the short circuit protection function?

The outputs are disabled immediately upon detecting a short circuit. If the short is removed, the device automatically activates again without latching.