PAM8902 Datasheet, PDF (1/13 Pages) Power Analog Micoelectronics – 30-Vpp Mono Class-D Audio Amplifier for Piezo/Ceramic Speakers

PAM8902
30-Vpp Mono Class-D Audio Amplifier for Piezo/Ceramic Speakers
Key Features
n Supply Voltage Range From 2.5 V to 5.5 V
n 30 Vpp Output Load Voltage From a 2.5 V
Supply
n Integrated Boost Converter Generates 17.5V
Supply
n Programmable softstart
n Small Boost Converter Inductor
n Selectable Gain of 18 dB, 22 dB, and 26 dB
n Selectable Boost output voltage of 8V, 12V,
and 17.5V
n Low Shutdown Current: <1uA
n Build in Thermal , OCP ,OVP,Short protection
n Available in Space Saving Packages:
16-ball 1.95mmx1.95mm CSP package
16-pin QFN4x4 package
Applications
n Wireless or Cellular Handsets
n Por t able DVD Player
n Personal Digital Assistants (PDAs )
n Electronic Dictionaries
n Digital Still Cameras
General Description
The PAM8902 is a mono, Class-D audio amplifier
with integrated boost convertor designed for piezo
and ceramic speakers.The PAM8902 is capable of
driving a ceramic/piezo speaker with
30Vpp(10.6Vrms) from a 3.6V power supply.The
PAM8902's Boost converter operates at a fixed
frequency of 1.5MHz , and provides a 17.5V supply
with a minimum number of external components.
PAM8902 features an integrated audio low pass
filter that rejects high frequency noise thus
improving audio fidelity. And three gain modes of
18dB, 22dB and 26dB easy for using.PAM8902 also
provides thermal ,short, under and over voltage
protection.
The PAM8902 is available in a 16-ball
1.95mmx1.95mm CSP package and 16-pin QFN4x4
package.
Typical Application Circuit
Battery
C1
10μF
L1
4.7μH
AVDD
ENA
GSET
VSET
*Option(Refer to Application Information)
SW
VOUT
PGND1
C2
10μF
PVCC
22nF 56k
1μF
COMP
PA M 8 9 0 2
VCM
22uH
0.1μF
OUT+
VIN
INP
0.1 μF
INN
O U T-
10Ω
PGND2
GND
Power Analog Microelectronics, Inc
www.poweranalog.com
1
01/2012 Rev1.4