PAM8904EJER

Overview

The PAM8904EJER is a piezo sounder driver manufactured by Diodes Incorporated, housed in a U-QFN3030-16 (Type B) package. It integrates a charge pump boost converter capable of driving ceramic or piezo sounders with up to 27VPP from a 4.5V supply, or 18VPP from a 3V supply. The device operates on a supply voltage range of 1.5V to 5.5V and supports input signals from 20Hz to 300kHz. Key electrical characteristics include an operating current of 14.2mA in differential 3x mode and a shutdown current of 0.008µA. It features automatic standby control, thermal shutdown, overcurrent protection, and undervoltage lockout.

Feature Summary

• Integrated charge pump boost converter generating up to 13.5V output for high-volume piezo drivers
• Automatic standby and wake-up control to extend battery life in portable applications
• Built-in protections including thermal shutdown, short-circuit protection, and undervoltage lockout
• Space-saving U-QFN3030-16 (Type B) package with exposed pad for efficient heat dissipation

Applications

• Health care systems
• Alarm clocks
• Security devices
• Home appliances

Procurement Notes

Verify the specific ordering suffix JER corresponds to the U-QFN3030-16 (Type B) package configuration. Confirm that the component status aligns with project requirements, as datasheet documentation indicates this specific variant may be classified as Not Recommended for New Design (NRND). Ensure compatibility with surface mount assembly processes suitable for QFN packages.

Selection Notes

Select the PAM8904EJER when a 16-pin U-QFN3030 footprint is required for space-constrained designs. Choose this variant over the 12-pin version if additional ground connections or pin flexibility are needed. Verify that the application load capacitance does not exceed 47nF and that the supply voltage remains within the 1.5V to 5.5V range to ensure proper charge pump operation.

Part Context

The PAM8904EJER is part of the PAM8904E family of piezo sounder drivers from Diodes Incorporated. This family includes variants with different package options such as the U-QFN3030-12 (Type A), W-QFN2020-12 (Type US), and U-QFN2020-12 (Type UX). All variants share the same core functionality but differ in physical dimensions and pin counts to suit various PCB layout constraints.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. For alternative sourcing, consider other Diodes Incorporated piezo drivers or verify cross-reference data through official manufacturer channels.