PAM8904JER

Overview

The PAM8904JER is a piezo sounder driver manufactured by Diodes Incorporated, housed in a 16-pin U-QFN3030-16 (Type B) package. It integrates a charge pump and boost converter to drive ceramic or piezo sounders with up to 24VPP from a 5.5V supply. The device supports 1x, 2x, and 3x charge pump modes and operates on a supply voltage range of 1.8V to 5.5V. Key electrical characteristics include an operating current of 50µA in 1x mode with no load, a shutdown current of less than 1µA, and thermal resistance (junction-to-ambient) of 35°C/W. It features automatic standby control, short-circuit protection, and thermal shutdown.

Feature Summary

• Integrated charge pump and boost converter generating up to 12V output at 1.0MHz fixed frequency
• Supports 1x, 2x, and 3x charge pump modes for flexible voltage scaling
• Automatic standby and wake-up control to minimize power consumption
• Built-in protections including thermal shutdown, over-current, over-voltage, and undervoltage lock-out

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 and Tape & Reel shipping configuration. Confirm compliance requirements such as RoHS 3 and Halogen-free status against project specifications. Ensure the supplier provides valid traceability documentation for the component batch.

Selection Notes

Select this component when driving piezo sounders requiring high peak voltages from low-voltage supplies. The 16-pin U-QFN3030-16 package offers a balance between PCB area and thermal performance compared to smaller variants. Consider the 3x mode limitations; avoid using 3x mode with supply voltages above 4.5V to prevent exceeding the absolute maximum output voltage rating.

Part Context

The PAM8904JER is part of the PAM8904 family produced by Diodes Incorporated. Other variants in this series include the PAM8904JPR (12-pin U-QFN3030-12 Type A) and PAM8904GPR (12-pin U-QFN2020-12 Type UX). An automotive-compliant version, PAM8904Q, is available under a separate datasheet.

Replacement Considerations

Direct pin-compatible replacements within the same package are limited to other PAM8904 variants like PAM8904JPR or PAM8904GPR, which differ only in pin count and package size. Cross-family replacements require careful evaluation of pinout compatibility and electrical parameters.