PAM8904E

Document number: DS41667 Rev. 2 - 2

1 of 10

www.diodes.com

February 2022

© Diodes Incorporated

PAM8904E

18VPP OUTPUT PIEZO SOUNDER DRIVER

Description

The PAM8904E is a piezo sounder driver with integrated charge

pump boost converter. The PAM8904E is capable of driving a

ceramic/piezo sounder with 27VPP from a 4.5V power supply. The

charge pump can operate in either 1x, 2x or 3x mode.

The boost converter operates at a fixed frequency of 100kHz and

provides a 3X VIN output with a minimum number of external

components. The PAM8904E can drive up to 47nF loading. Diodes

Incorporated’s unique drive technology provides a small inrush

current, low EMI and high efficiency.

The PAM8904E includes built-in automatic shutdown and wake up

that guarantees longer battery life. The PAM8904E features thermal

shutdown, over current protection, over voltage protection and under

voltage lock-out.

The PAM8904E is available in U-QFN3030-16 (Type B), U-QFN3030-

12 (Type A) and W-QFN2020-12 (Type US) packages.

Features



Supply Voltage Range from 1.5V to 5.5V



18VPP Output from a 3V Supply



Integrated Boost Converter Generates up to 13.5V Supply



Input Signal 20Hz to 300kHz



No Voltage Cross Output in Shutdown Mode



Low Current Consumption



Automatic Standby and Wake-up Control



Available in Space Saving Packages U-QFN3030-16 (Type B),

U-QFN3030-12 (Type A) and W-QFN2020-12 (Type US)

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/

Pin Assignments

U-QFN3030-16 (Type B)

Top View

U-QFN3030-12 (Type A)/W-QFN2020-12 (Type US)

Top View

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) & 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 "Gr

een” 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

EN1

NC

Pin 1

VIN

CP2

VOUT

CN1

GND

VO2

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

1

2

3

4

5

6

7

8

9

10

11

12

CP1

CN2

VO1

EN2

DIN

NC

EN1

EN2

DIN

CN1 GND VO2

VIN CP2 VOUT

CP1

CN2

VO1