PAM8907
31VPP OUTPUT PIEZO SOUNDER DRIVER WITH BOOST CONVERTER
Pin Assignments
Description
The PAM8907 is a piezoelectric horn driver with built-in boost
converter, capable of driving a ceramic/piezo sounder with up to
31VPP output. With integrated boost converter, the PAM8907 can
provide an optimized solution with higher Sound Pressure Level
(SPL) for louder output sound, lower quiescent current for longer
standby time, and auto turn-on/off feature for extended operating
lifetime. The PAM8907 provides clear benefits for battery-operated
tracker, piezoelectric horn or alarm related applications.
U-QFN2020-10
VCC
1
2
3
4
5
10 VIN
GND
BOOT
SW
9
8
7
VSET
DIN
OUTP
VOUT
6
The PAM8907 integrates a boost converter that operates at a typical
frequency of 1.8MHz. With integrated boost converter and unique
piezo sounder driver technology, the PAM8907 provides small inrush
current, low EMI and yet highly efficient system performance.
PAM8907 boost converter output can be set to either 11V or 15.6V
with minimum external components for various application usages.
OUTN
(Top View)
Applications
Bluetooth or wireless location trackers
Air humidifier or ultrasonic related piezo driver applications
Security devices, home appliances
Haptic feedbacks
The PAM8907 has built-in automatic shutdown and wake-up
functions for longer operating lifetime requirement. It also features
thermal shutdown protection, overcurrent protection, overvoltage
protection and undervoltage lockout protection to assure safe system
operation.
Typical Applications Circuit
The PAM8907 is available in U-QFN2020-10 package.
1.0mH
Option
VOUT
Features
1.8V to 5.5V
0.1mF
Supply Voltage Range from 1.8V to 5.5V
10mF
1mF
Intergraded Boost Converter VOUT = 11V or 15.6V
Drive Piezo Sounder with up to 31VPP
VIN
10
BOOT
SW
3
4
High-Speed Driver Designed with Very Short Turn-On/Turn-Off
No Voltage Cross Output at Shutdown Mode
5
VCC
1
1mF
1mF
High Impendence Output at Shutdown Mode
Low Current Consumption, with Shutdown Current < 1μA
Automatic Shutdown and Wake-Up Control
VO=15.6V
PAM8907
OUTP
OUTN
VO=11V
Available in Space-Saving U-QFN2020-10 package
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/
VSET 9
7
6
DIN
8
PWM input
2
GND
Note: Schottky diode is optional. If added, it can save 20% of power
consumption.
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.
1 of 10
www.diodes.com
April 2023
PAM8907
© 2023 Copyright Diodes Incorporated. All Rights Reserved.
Document number: DS43314 Rev. 3 - 2
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