PAM8007DHR

Overview

The PAM8007DHR is a filterless 3W Class-D stereo audio amplifier with an integrated headphone driver, manufactured by Diodes Incorporated. It operates on a single supply voltage ranging from 2.5V to 5.5V and delivers up to 3W of output power into a 4Ω load at 10% THD+N. The device features a 64-step DC volume control for both speaker and headphone channels, low quiescent current, and high efficiency reaching 92%. It includes short-circuit protection and thermal shutdown, housed in a SOP-24 package.

Feature Summary

• Filterless architecture eliminates the need for external low-pass output filters, reducing system cost and PCB area.
• Integrated 64-step DC volume control allows independent adjustment of speaker and headphone gain levels.
• High efficiency up to 92% extends battery life in portable applications compared to Class-AB amplifiers.
• Built-in protection mechanisms include short-circuit protection and thermal shutdown to ensure device reliability.

Applications

• LCD monitors and TV projectors
• Notebook computers
• Portable speakers
• Portable DVD players and game machines
• VoIP and speaker phones

Procurement Notes

Verify component authenticity through authorized Diodes Incorporated distributors or certified partners. Confirm the SOP-24 package marking matches official datasheet specifications. Ensure storage conditions comply with moisture sensitivity level requirements prior to soldering. Validate that the specific revision aligns with design documentation before integration.

Selection Notes

Select this component for designs requiring a combined stereo amplifier and headphone driver without external filtering components. Consider the SOP-24 package constraints and verify power supply voltage stability within the 2.5V to 5.5V range. Evaluate thermal management needs based on the specified junction-to-ambient resistance values under maximum load conditions.

Part Context

The PAM8007 series represents a family of filterless Class-D audio amplifiers designed for portable electronics. The DHR suffix specifically denotes the SOP-24 surface-mount package variant. This component integrates both the main audio amplifier stage and a dedicated headphone output stage into a single chip solution.

Replacement Considerations

Diodes Incorporated recommends using the PAM8019E as a replacement for new designs. Verify pin compatibility and electrical characteristics when substituting other Class-D amplifiers from different manufacturers.

FAQ

Does the PAM8007 require external LC filters for speaker operation?

No, the PAM8007 utilizes a filterless architecture that drives speakers directly without the need for external low-pass output filters.

How is the volume controlled in the PAM8007?

Volume is managed via a 64-step DC volume control input that adjusts the gain for both the Class-D speaker output and the headphone output independently.

What happens if the internal temperature exceeds the limit?

Thermal shutdown activates when the junction temperature exceeds +150°C, disabling the outputs. The device automatically resumes normal operation once the temperature drops by approximately 30°C.