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 at 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)
Pin Assignments
(Top View)
Pin 1
NC VIN CP2 VOUT
16 15 14 13
EN1 1
12 NC
EN2 2
11 CP1
DIN 3
10 CN2
NC 4
9 VO1
5 6 78
CN1 GND VO2 NC
U-QFN3030-16 (Type B)
(Top View)
Pin 1
VIN CP2 VOUT
12 11 10
EN1 1
EN2 2
DIN 3
9 CP1
8 CN2
7 VO1
45 6
CN1 GND VO2
U-QFN3030-12 (Type A)/W-QFN2020-12 (Type US)
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 "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
PAM8904E
Document number: DS41667 Rev. 1 - 2
1 of 10
www.diodes.com
March 2019
© Diodes Incorporated
