PAM8904GPR

Overview

The PAM8904GPR is a Class D piezo sounder driver manufactured by Diodes Incorporated, designed to drive ceramic or piezo sounders with an 18Vpp output from a low voltage supply. It integrates a charge pump boost converter capable of generating a 9V internal supply from input voltages ranging from 2.3V to 5.5V. The device supports 1X, 2X, and 3X charge pump modes and operates at a fixed frequency of 1.0MHz. It features automatic shutdown and wake-up control for extended battery life, along with thermal shutdown, over-current protection, over-voltage protection, and under-voltage lock-out. The component is housed in a U-QFN2020-12 package.

Feature Summary

• Integrated charge pump boost converter generates high voltage output for driving piezo sounders
• Automatic standby and wake-up control mechanism ensures extended battery life
• Built-in protection features including thermal shutdown, over-current, over-voltage, and under-voltage lock-out

Applications

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

Procurement Notes

Verify the specific suffix 'GPR' against official Diodes Incorporated documentation to confirm package type and reel specifications. Ensure compatibility with the U-QFN2020-12 footprint if applicable. Confirm availability status as distribution data may vary by region. Cross-reference electrical parameters with the official datasheet before integration.

Selection Notes

Select this component when a compact solution is required to drive piezo sounders from low voltage sources like single-cell lithium batteries. The integrated boost converter eliminates the need for external inductors typically required in discrete solutions. Consider the operating temperature range and protection features for reliable performance in consumer electronics.

Part Context

The PAM8904 belongs to Diodes Incorporated's audio and piezo driver product line. It is part of a family of devices designed for portable applications requiring efficient sound generation. Similar variants include PAM8904EJER and PAM8904EGPR, which may differ in packaging or suffix designations but share core functional characteristics.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify pinout and electrical specifications carefully when considering alternative components from other manufacturers.