PAM8408DR

Overview

The PAM8408DR is a discontinued stereo Class-D audio amplifier manufactured by Diodes Incorporated. It operates on a supply voltage range of 2.5V to 6.0V and delivers up to 3W output power at 10% THD with a 4Ω load and 5V supply. The device features fully differential inputs, low quiescent current (8mA typical), and an integrated 32-step memory volume control ranging from -80dB to 24dB. It includes auto-recovery short-circuit protection and thermal shutdown, housed in an SO-16L package.

Feature Summary

• Integrates 32-step memory up/down volume control that retains settings during shutdown mode
• Utilizes filter-less architecture with fully differential inputs to minimize external components and reduce noise
• Includes built-in auto-recovery short-circuit protection and thermal shutdown for system reliability

Applications

• PC speakers
• Wireless speakers
• Home sound systems
• Active speakers
• Docking stations

Procurement Notes

Verify component obsolescence status before procurement as the PAM8408 series is officially marked obsolete. Confirm availability through authorized distributors or secondary markets. Review the manufacturer's discontinuation notification for transition timelines. Ensure design updates align with recommended replacement parts to maintain supply chain stability.

Selection Notes

Select this component only if legacy compatibility is required, as it has been superseded by newer models. Evaluate the 32-step digital volume control feature for applications needing hardware-based gain adjustment without microcontroller intervention. Consider the differential input requirement for noise-sensitive environments. Verify that the 2.5V to 6.0V operating range matches the target power supply architecture.

Part Context

The PAM8408 belongs to Diodes Incorporated's PAM84xx series of Class-D audio amplifiers designed for portable and battery-powered applications. This series emphasizes high efficiency and minimal external component counts. The PAM8408 specifically differentiates itself through its integrated memory volume control and differential input stage, targeting cost-sensitive consumer electronics where board space is limited.

Replacement Considerations

Use the PAM8019E as the confirmed public substitute part number.

FAQ

Does the volume setting persist when the device enters shutdown mode?

Yes, the PAM8408 features memory up/down volume control that retains the last gain setting even when the chip is in shutdown mode.

What is the maximum supply voltage for the PAM8408?

The recommended operating supply voltage range is 2.5V to 6.0V, with an absolute maximum rating of 6.5V.