PAM8902
30-Vpp Mono Class-D Audio Amplifier for Piezo/Ceramic Speakers
Key Features
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Supply Voltage Range From 2.5 V to 5.5 V
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30 Vpp Output Load Voltage From a 2.5 V
Supply
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Integrated Boost Converter Generates 17.5V
Supply
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Programmable softstart
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Small Boost Converter Inductor
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Selectable Gain of 18 dB, 22 dB, and 26 dB
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Selectable Boost output voltage of 8V, 12V,
and 17.5V
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Low Shutdown Current: <1uA
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Build in Thermal , OCP ,OVP,Short protection
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Available in Space Saving Packages:
16-ball 1.95mmx1.95mm CSP package
16-pin QFN4x4 package
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.
T h e PA M 8 9 0 2 i s a v a i l a b l e i n a 1 6 - b a l l
1.95mmx1.95mm CSP package and 16-pin QFN4x4
package.
Applications
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Wireless or Cellular Handsets
Por t able DVD Player
Personal Digital Assistants (PDAs )
Electronic Dictionaries
Digital Still Cameras
Typical Application Circuit
L1
Battery
*Option(Refer to Application Information)
C1
10
μ
F
AVDD
4.7
μ
H
SW
ENA
GSET
VSET
VOUT
C2
PGND1
10
μ
F
PVCC
22nF 56k
1
μ
F
COMP
PAM8902
VCM
22uH
OUT+
0.1
μ
F
VIN
0.1
μ
F
INP
INN
OUT-
PGND2
GND
10Ω
Power Analog Microelectronics
,
Inc
www.poweranalog.com
01/2012 Rev1.4
1
PAM [ POWER ANALOG MICOELECTRONICS ]
