PAM8403DR-L_B00

Overview

The PAM8403DR-L_B00 is a filterless Class-D stereo audio amplifier manufactured by Diodes Incorporated. It delivers 3W output power at 10% THD with a 4Ω load and 5V supply. The device operates within a supply voltage range of 2.5V to 5.5V and features low quiescent current, high efficiency up to 90%, and low EMI. It includes short circuit protection and thermal shutdown. The component is housed in an SOP-16 package.

Feature Summary

• Filterless architecture eliminates the need for external low-pass output filters.
• High efficiency extends battery life in portable applications.
• Integrated short circuit and thermal shutdown protection.

Applications

• LCD Monitors
• TV Projectors
• Notebook Computers
• Portable Speakers
• Cellular Phones

Procurement Notes

Verify the obsolete status and discontinuation notification dated July 17, 2026, before procurement planning. Confirm that the ordering suffix does not alter the functional specifications or pinout compared to the standard PAM8403DR variant. Ensure compatibility with existing SOP-16 footprints during sourcing.

Selection Notes

Select this component for designs requiring high-efficiency stereo amplification without bulky output filters. Consider the maximum junction temperature limits and thermal resistance values when designing heat dissipation strategies. Verify input signal levels to prevent clipping due to the fixed internal gain structure.

Part Context

This part belongs to the PAM8403 series of Class-D audio amplifiers. It is designed as a cost-effective solution for portable electronics where PCB space and battery longevity are critical constraints. The device replaces traditional Class-AB amplifiers to improve system performance and reduce component count.

Replacement Considerations

The datasheet explicitly recommends using the PAM8406 instead of the PAM8403 for new designs.

FAQ

What is the recommended analog reference bypass capacitor value?

A ceramic bypass capacitor with a value between 0.47μF and 1.0μF is recommended for optimal THD and noise performance.

How does the MUTE pin function?

The MUTE pin disables the outputs when held logic low and enables them when logic high. It can be left floating due to an internal pull-up.