Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details. U-QFN3030-16 (Type B)

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PAM8904Q

Automotive 18VPP output Peizo sounder driver

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Description

The PAM8904Q is a piezo sounder driver designed for driving a ceramic/piezo sounder or speaker with 18Vpp from a 3V power supply. A programmable charge pump boost converter allows the PAM8904Q Vout to operate in 1X, 2X and 3X mode.

The boost converter operates at a fixed frequency of 1.0MHz and provides a 9V output with a minimum number of external components and can drive loads of up to 15nF. PAM’s unique drive technology ensures minimal inrush current, low EMI and high efficiency.

Feature(s)

Supply voltage Range From 2.3V to 5V
18VPP Output from a 3V Supply
Integrated Boost Converter Generates 9V Supply
Wide Input signal capability 20 Hz to 300KHz
No Voltage Cross Output At Shutdown Mode
Low Current Consumption
Automatic Standby and Wake-up Control
Over Temperature Shut Down and Short Circuit Protection
Automotive AECQ Grade 2
Available in Space Saving Packages 16pin QFN package

Application(s)

Automotive Alarms
Dash Board Audio
GPS
Health Care System
Alarm Clock
Security Device
Home Appliance

Specifications & Technical Documents

Product Parameters

IQ(mA)	<1uA
Compliance (Only Automotive Supports PPAP)	Automotive
AEC Qualified	Yes
Input Type	PWM In
Category	Piezo Driver
Minimum V_DD (V)	2.3
Maximum V_DD (V)	5.5
Boost Type	charge pump
Maximum Output (Vpp)	18
Mono or Stereo	Mono
Control Interface	GPIO
Special Features	Auto wake-up and standby with one GPIO control

Technical Documents

Recommended Soldering Techniques

TN1.pdf

Purchase & Availability

Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN #	Issue Date	Implementation Date	Subject
PCN-2770	2025-10-30	2025-10-30	Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products