PAM8001NHR

Overview

The PAM8001NHR is a 2W Class-D stereo audio amplifier from Diodes Incorporated, housed in an SSOP-24L package. It operates on a supply voltage range of 2.5V to 5.5V with a typical quiescent current of 11.5mA at 5V. The device delivers 2W output power into a 4Ω load at 1% THD+N. Key electrical features include a low output offset voltage of 20mV and drain-source on-state resistance values of 0.21Ω for the P-MOSFET and 0.165Ω for the N-MOSFET.

Feature Summary

• Integrates unique anti-saturation technology that automatically detects and suppresses output signal clipping caused by over-level input signals while controlling gain to set maximum power.
• Features a 64-step DC volume control mechanism that minimizes external component requirements and allows precise speaker volume adjustment via a single pin.
• Utilizes a filterless architecture that drives speakers directly without low-pass output filters, thereby reducing system cost and PCB area while maintaining high efficiency.
• Includes comprehensive protection mechanisms such as short circuit protection, thermal shutdown with auto-recovery, and under-voltage lock-out functionality.

Applications

• LCD Monitors and TV Projectors
• Notebook Computers
• Portable Speakers
• Portable DVD Players and Game Machines
• VoIP and Speaker Phones

Procurement Notes

Verify the specific ordering suffix 'NHR' corresponds to the SSOP-24L package type and tape & reel shipping configuration as defined in the manufacturer's ordering information. Confirm that the component meets RoHS compliance standards and Pb-Free packaging requirements before finalizing procurement specifications for production integration.

Selection Notes

Select this component for designs requiring a compact stereo amplifier solution with integrated volume control and anti-saturation protection. Ensure the application environment stays within the recommended operating temperature range of -20°C to +85°C and that the power supply voltage remains between 2.5V and 5.5V to guarantee optimal performance and reliability.

Part Context

The PAM8001 belongs to Diodes Incorporated's line of Class-D audio amplifiers designed for portable consumer electronics. It offers superior efficiency compared to Class-AB counterparts, helping to extend battery life in mobile devices. The device is available in both SSOP-24L and QFN3x3-20L packages to accommodate different PCB layout constraints.

Replacement Considerations

The datasheet explicitly states that the PAM8001 is not recommended for new designs and recommends using the PAM8019 as the replacement part.

FAQ

How does the anti-saturation function protect the speaker?

The anti-saturation function detects output signal clipping due to over-level input signals and automatically suppresses the clipping by adjusting the gain step-by-step, protecting low wattage speakers from overdrive damage.

What is the purpose of the VPL pin?

The VPL pin is used to set the maximum output power limit voltage via an external resistor divider, allowing for adjustable power limiting to prevent clipping.