PAM8906

Document number: DS44739 Rev. 1 - 2

1 of 11

www.diodes.com

December 2022

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PAM8906

36VPP OUTPUT PIEZO SOUNDER DRIVER WITH SELF-EXCITATION MODE

Description

Pin Assignments

The

DIODES™ PAM8906 is a piezoelectric sounder driver with built-

in boost converter, capable of driving a piezo sounder with up to

36VPP output. With integrated boost converter, the PAM8906 can

provide an optimized solution with higher Sound Pressure Level

(SPL) for louder output sound, and lower quiescent current along

with auto turn-on/off feature for extended battery runtime. PAM8906

provides clear benefits for battery-operated piezoelectric sounder or

alarm related applications.

With the integrated boost converter and unique piezo sounder driver

technology, PAM8906 provides small inrush current, low EMI and yet

delivers high system efficiency. The integrated boost converter

switches at a fixed frequency of 1.8MHz and as a result, it can

operate with a small 0.47µH inductor.

The PAM8906 comes in three different Output Voltage (VOUT)

options: 10V, 12V, and 18V.

The PAM8906 can operate with an external PWM input or operate in

self-excitation mode (only 10V and 12V supported in this mode) for

various piezo sounder applications. It also features thermal shutdown

protection, over-current protection, over-voltage protection and

under-voltage-lockout protection to ensure safe system operation.

The PAM8906 is available in MSOP-10 package for smaller PCB

footprint and higher SMT yield.

Features



Supply Voltage Range from 2.1V to 5.5V



Intergraded Boost Converter with VOUT = 10V, 12V or 18V



Automatic Shutdown and Wake-Up Control



Support External PWM Input or Self-Excitation Mode



Low Operating Current, with Shutdown Current < 1

μA



High-Speed Driver Designed with Very Short Turn-On/Turn-Off



High-Impendence Output in Shutdown Mode



Available in Space-Saving MSOP-10 Packages



Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)



Halogen and Antimony Free. “Green” Device (Note 3)



For automotive applications requiring specific change

control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP

capable, and manufactured in IATF 16949 certified

facilities), please contact us or your local Diodes

representative.

https://www.diodes.com/quality/product-definitions/

(Top View)

MSOP-10

Applications



Smoke / gas / water alarms, or industrial security alarms



Air humidifiers or ultrasonic related piezo driver applications



Security devices, home appliances



Haptic feedbacks

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.

2. See https://www.diodes.com/quality/lead-

free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and

Lead-free.

3. Halogen- and Antimony-

free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

VCC

GND

BOOT

SW

VOUT

VIN

DIN

FB

OUTP

OUTN