PAM8019EFS-7

Overview

The PAM8019EFS-7 is a stereo audio amplifier integrating a 4W Class-D power stage for bridged-tied speakers and an 88mW Class-AB headphone driver. It operates on a supply voltage range of 2.5V to 6.0V. The device features 62-step DC volume control with a gain range from +20dB to -60dB, integrated auto gain control (AGC), and spread spectrum modulation (SSM) for EMI suppression. It utilizes U-QFN3030-20 packaging.

Feature Summary

• Integrates a 4W Class-D amplifier for speakers and a Class-AB driver for headphones within a single component.
• Features 62-step DC volume control allowing precise gain adjustment without external components.
• Includes auto gain control technology to suppress output clipping and protect connected speakers.
• Supports speaker open and short detection during startup to ensure system safety before operation.

Applications

• LCD monitors and televisions
• Projectors and all-in-one computers
• Portable or active speakers
• Bone conductive headphones
• DVD players

Procurement Notes

Verify the specific ordering suffix FS-7 corresponds to the U-QFN3030-20 package and 1,500-unit tape and reel quantity. Confirm that the component meets RoHS compliance and halogen-free requirements as specified in the manufacturer documentation. Ensure compatibility with the intended operating voltage range of 2.5V to 6.0V for the target application design.

Selection Notes

Select this component when a combined solution for both speaker and headphone outputs is required to minimize board space. The integrated DC volume control simplifies interface design by reducing external component count. Consider the thermal resistance characteristics of the U-QFN3030-20 package for heat dissipation planning in enclosed portable enclosures.

Part Context

This part belongs to the PAM8019E series of audio amplifiers manufactured by Diodes Incorporated. The series provides high-efficiency audio solutions for consumer electronics. The FS-7 suffix specifically denotes the smaller U-QFN3030-20 surface-mount package variant, distinguishing it from the larger U-QFN4040-20 version available in the same product family.

Replacement Considerations

PAM8019EFH-13 serves as a direct package alternative using the U-QFN4040-20 footprint. Verify pinout compatibility and thermal performance differences between the two package sizes before substitution. No other functional substitutes are documented in the provided datasheet.

FAQ

How does the Auto Gain Control (AGC) function protect the speakers?

The AGC circuit automatically regulates the amplifier gain when the output reaches a maximum power setting. This prevents waveform clipping, reduces distortion, and helps protect the speakers from damage while maintaining optimal audio performance.

What is the purpose of the Spread Spectrum Modulation (SSM) feature?

SSM randomizes the oscillator frequency to improve electromagnetic interference (EMI) performance. This allows the use of inexpensive ferrite bead filters instead of bulky LC filters to meet EMI standards.

How is the volume level adjusted on the PAM8019E?

Volume is controlled via a DC voltage applied to the Volume pin. The device offers 62 discrete steps, adjusting the gain from +20dB (at 0V) to -60dB (at VDD).