PAM8001XHR

Overview

The PAM8001XHR is a 2W Class-D stereo audio amplifier manufactured by Diodes Incorporated, housed in a QFN3x3-20L surface-mount package. It operates on a supply voltage range of 2.5V to 5.5V with a quiescent current of 11.5mA typical. The device delivers 2W output power at 1% THD into a 4Ω load at 5V. Key electrical parameters include a maximum junction temperature of 125°C and an operating ambient temperature range of -20°C to +85°C. It features 64-step DC volume control, anti-saturation technology, and short circuit protection.

Feature Summary

• Anti-Saturation Technology: Automatically detects and suppresses output signal clipping caused by over-level input signals while controlling gain to set maximum power.
• Filterless Architecture: Drives speakers directly without low-pass output filters, reducing system cost and PCB area.
• DC Volume Control: Provides 64-step digital volume adjustment to minimize external components.
• Power Protection: Includes adjustable maximum output power setting with no clipping, short circuit protection, and thermal shutdown.

Applications

• LCD Monitors
• TV Projectors
• Notebook Computers
• Portable Speakers
• VoIP/Speaker Phones

Procurement Notes

Verify the component status before procurement as the datasheet explicitly states this part is not recommended for new designs. Confirm that the QFN3x3-20L package matches your layout requirements. Ensure the application environment stays within the specified -20°C to +85°C operating temperature range. Check for availability of the recommended replacement model if sourcing this discontinued or obsolete part proves difficult.

Selection Notes

Select this component for portable applications requiring high efficiency up to 90% and low pop noise. It is suitable for systems where battery life extension is critical due to its low quiescent current. Consider the QFN3x3-20L package for space-constrained designs. Ensure the design accommodates separate PGND traces for each channel to minimize noise currents and maintain performance.

Part Context

The PAM8001 is part of Diodes Incorporated's Class-D audio amplifier family, designed to replace Class-AB amplifiers in portable devices. The XHR suffix specifically denotes the QFN3x3-20L package type shipped in tape and reel format. This series emphasizes filterless operation and integrated protection features to simplify board design and improve reliability in consumer electronics.

Replacement Considerations

The datasheet recommends using the PAM8019 as a replacement for new designs.

FAQ

How does the anti-saturation function protect the speaker?

It detects output signal clipping due to over-level input signals and automatically suppresses the clip by adjusting the gain step-by-step to prevent damage to low wattage speakers.

What is the purpose of the VPL pin?

The VPL pin is used to set the maximum output power limit via an external resistor divider, allowing for adjustable power limiting with no clipping.