Datasheet PAM8904E (Diodes)

PAM8904E 18VPP OUTPUT PIEZO SOUNDER DRIVER Description Pin Assignments
The PAM8904E is a piezo sounder driver with integrated charge
(Top View)
pump boost converter. The PAM8904E is capable of driving a ceramic/piezo sounder with 27VPP from a 4.5V power supply. The NC VIN CP2 VOUT charge pump can operate in either 1x, 2x or 3x mode. Pin 1 16 15 14 13 The boost converter operates at a fixed frequency of 100kHz and 1 12 NC EN1

provides a 3X VIN output with a minimum number of external EN2 2 11 CP1
T
components. The PAM8904E can drive up to 47nF loading. Diodes DIN 3 10 CN2
C
Incorporated’s unique drive technology provides a small inrush NC 4 9 VO1
U
current, low EMI and high efficiency.
D
5 6 7 8
O
CN1 GND VO2 NC The PAM8904E includes built-in automatic shutdown and wake up
R P
that guarantees longer battery life. The PAM8904E features thermal
U-QFN3030-16 (Type B)
shutdown, over current protection, over voltage protection and under
W (Top View)
voltage lock-out.
E N
The PAM8904E is available in U-QFN3030-16 (Type B), U-QFN3030- VIN CP2 VOUT Pin 1

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

11 10
Features
EN1 1

9 CP1 Supply Voltage Range from 1.5V to 5.5V

EN2 2 8 CN2

18VPP Output from a 3V Supply DIN 3

7 VO1 Integrated Boost Converter Generates up to 13.5V Supply

4 5 6 Input Signal 20Hz to 300kHz

CN1 No Voltage Cross Output at Shutdown Mode GND VO2

Low Current Consumption
U-QFN303 0-12 (Type A)/W-QFN2020-12 (Type US)
Automatic Standby and Wake-up Control Available in Space Saving Packages U-QFN3030-16 (Type B),
Applications
U-QFN3030-12 (Type A) and W-QFN2020-12 (Type US) Health Care Systems Packages Alarm Clocks
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Security Devices
Halogen and Antimony Free. “Green” Device (Note 3)
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 1 of 10 March 2019 Document number: DS41667 Rev. 1 - 2
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