PAM8904

Document number: DS37246 Rev. 2 - 2

1 of 9

www.diodes.com

May 2017

© Diodes Incorporated

PAM8904

18VPP OUTPUT PIEZO SOUNDER DRIVER

Description

The PAM8904 is a piezo sounder driver with integrated charge pump

boost converter. The PAM8904 is capable of driving a ceramic/piezo

operate in either a 1x, 2x or 3x mode.

The boost converter operates at a fixed frequency of 1.0MHz and

provides a 12V output with a minimum number of external

components. The PAM8904 can drive up to 15nF loading. Diodes

Incorporated’s unique drive technology provides a small inrush

current, low EMI and high efficiency.

PAM8904 includes built-in automatic shutdown and wake up that

guarantees longer battery life. PAM8904 features thermal shutdown,

over current protection, over voltage protection and under voltage

lock-out.

The PAM8904 is available in a 16-pin U-QFN3030-16 (Type B)

package, or 12-pin U-QFN3030-12 (Type A) package.

Features



Supply Voltage Range from 2.3V to 5.5V





Integrated Boost Converter Generates up to 12V Supply



Input Signal 20Hz to 300kHz



No Voltage Cross Output at Shutdown Mode



Low Current Consumption



Automatic Standby and Wake-up Control



Available in Space Saving Packages 16 Pin U-QFN3030-16

(Type B) or 12 Pin U-QFN3030-12 (Type A) Package



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



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



An Automotive-Compliant Part is Available Under Separate

Datasheet (PAM8904Q)

Pin Assignments

(Top View)

U-QFN3030-16 (Type B)

(Top View)

U-QFN3030-12 (Type A)

Applications



Health Care Systems



Alarm Clocks



Security Devices



Home Appliances

Notes:

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

2. See http://www.diodes.com/quality/lead_free.html

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

and Lead-free.

3. Hal

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

<1000ppm antimony compounds.

Pin 1

NC

VIN

CP2 VOUT

CN1 GND VO2

NC

Pin 1

VIN

CP2

VOUT

CN1

GND

VO2