A Product Line of
Diodes Incorporated
PAM8902H
30 V
PP
MONO CLASS-D AUDIO AMPLIFIER FOR PIEZO/CERAMIC SPEAKERS
Description
The PAM8902H is a mono, Class-D audio amplifier with integrated
boost convertor designed for piezo and ceramic speakers.The
PAM8902H is capable of driving a ceramic/ piezo speaker with
30Vpp(10.6Vrms) from a 3.6V power supply.The PAM8902H's Boost
converter operates at a fixed frequency of 1.5MHz , and provides a
17.5V supply with a minimum number of external components.
PAM8902H features an integrated audio low pass filter that rejects
high frequency noise thus improving audio fidelity. And three gain
modes of 21dB, 26dB and 32.5dB easy for using.PAM8902H also
provides thermal ,short, under and over voltage protection.
The PAM8902H is available in a 16-ball 1.95mm x 1.95mm CSP
package and 16-pin QFN4x4 package.
Pin Assignments
Features
•
•
•
•
•
•
•
•
•
•
Supply Voltage Range From 2.5V to 5.5V
30 V
PP
Output Load Voltage From a 2.5V Supply
Integrated Boost Converter Generates 17.5V Supply
Programmable Soft-Start
Small Boost Converter Inductor
Selectable Gain of 21dB, 26dB, and 32.5dB
Selectable Boost Output Voltage of 8V, 12V, and 17.5V
Low Shutdown Current: <1µA
Build in Thermal , OCP ,OVP,Short Protection
Available in Space Saving Packages:
16-ball 1.95mmx1.95mm CSP Package
16-pin QFN4x4 Package
Applications
Wireless or Cellular Handsets
Portable DVD Player
Personal Digital Assistants (PDAs )
Electronic Dictionaries
Digital Still Cameras
PAM8902H
Document number: DSxxxxx Rev. 1 - 0
1 of 12
www.diodes.com
December 2012
© Diodes Incorporated
A Product Line of
Diodes Incorporated
PAM8902H
Typical Applications Circuit
Pin Descriptions
Pin Name
PVCC
VOUT
SW
PGND1
OUT+
VSET
COMP
AVDD
OUT-
GSET
VCM
AGND
PGND2
ENA
INN
INP
Bump (CSP)
A1
A2
A3
A4
B1
B2
B3
B4
C1
C2
C3
C4
D1
D2
D3
D4
Pin Number (QFN)
16
1
2
4
15
3
5
6
14
11
7
8
13
12
10
9
Function
Audio Amplifier Power Supply
Boost Convertor Output
Boost Convertor Switching Node
Boost Convertor Power Ground
Positive Differential Audio Output
Boost Convertor Output Voltage Setting (8V,12V,17.5V)
Boost Convertor compensation
Power Supply
Negative Differential Audio Output
Amplifier Gain setting ( 21dB , 26dB , 32.5dB)
Common Mode bypass Cap
Analog Ground
Class D Power Ground
Whole chip Enable
Negative Differential Audio Input
Positive Differential Audio Input
PAM8902H
Document number: DSxxxxx Rev. 1 - 0
2 of 12
www.diodes.com
December 2012
© Diodes Incorporated
A Product Line of
Diodes Incorporated
PAM8902H
Functional Block Diagram
Absolute Maximum Ratings
(@T
A
= +25°C, unless otherwise specified.)
These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods may affect device reliability.
All voltages are with respect to ground.
Parameter
Supply Voltage
Input Voltage
Storage Temperature
Maximum Junction Temperature
Soldering Temperature
Rating
6.0
-0.3 to V
DD
+0.3
-65 to 150
150
250, 10sec
Unit
V
°C
Recommended Operating Conditions
(@T
A
= +25°C, unless otherwise specified.)
Parameter
Supply Voltage Range
Ambiient Temperature Range
Junction Temperature Range
Rating
2.5 to 5.5
-40 to +85
-40 to +125
Unit
V
°C
PAM8902H
Document number: DSxxxxx Rev. 1 - 0
3 of 12
www.diodes.com
December 2012
© Diodes Incorporated
A Product Line of
Diodes Incorporated
PAM8902H
Thermal Information
Parameter
Thermal Resistance
(Junction to Ambient)
Thermal Resistance
(Junction to Case)
Symbol
θ
JA
θ
JC
Package
CSP
QFN4x4-16
CSP
QFN4x4-16
Maximum
90
52
72
30
Unit
°C/W
°C/W
Electrical Characteristics
(@T
A
= +25°C, V
DD
= 3.6V, C
L
= 1µF, V
SET
Float, unless otherwise specified.)
Symbol
V
DD
I
Q
I
SD
T
WU
V
EH
V
EL
V
H
V
F
V
L
UVLO
UVLO
H
OTP
OTP
H
Input Voltage
Quiescent Current
Shutdown Current
Wake-Up Time
Chip Enable
Chip Disable
GSET/VSET High
GSET/VSET Floating
GSET/VSET Low
Under Voltage Lockout Threshold
Under Voltage Lockout Hysteresis
Thermal Shutdown Threshold
Thermal Shutdown Lockout Hysteresis
V
DD
From High to Low
V
DD
From Low to High
V
DD
-0.5
1
0
2.2
0.2
150
30
EN > 1.2V, VSET = High
EN > 1.2V, VSET = Floating
EN > 1.2V, VSET = GND
EN = 0V
EN From Low to High
1.2
0.4
V
DD
V
DD
-1
0.5
V
°C
°C
V
Parameter
Conditions
Min
2.5
30
10
5
0.1
40
Typ
Max
5.5
48
18
12
1.0
Unit
V
mA
µA
mS
V
Boost Converter
V
O
1
V
O
2
V
O
3
C
L
R
LS
f
OSCB
Class-D
f
OSCD
CMRR
V
OS
R
P
A
V
1
A
V
2
A
V
3
PSRR
THD+N
SNR
Power Supply Reject Ratio
Total Harmonice Distortion Plus Noise
Signal to Noise Ratio
Closed-Loop Voltage Gain
Class-D Amplifier Switching Frequency
Common Mode Reject Ratio
Output Offset Voltage
R
DS(ON)
Input AC-GND
V
IN
= ±100mV, V
DD
= 3.6V
Output Offset Voltage
High Side
Low Side
G
SET
= AVDD, V
O
= 1V
RMS
G
SET
= AVDD, V
O
= 1V
RMS
G
SET
= AVDD, V
O
= 1V
RMS
200m V
PP
Supply Ripple @ 217Hz
V
O
= 5V
RMS
Input AC Ground, A-Weighting
225
375
60
5
1.5
0.6
32.5
26
21
70
0.3
90
dB
%
dB
dB
50
475
KHz
dB
mV
Ω
Ω
Current Limit
Low Side MOSFET R
DS(ON)
Boost Switching Frequency
Output Voltage
VSET = GND, No Load
VSET = NC, No Load
VSET = AVDD, No Load
Average Input Current
I
O
= 50mA
1.1
7.2
10.8
16
8.0
12.0
17.5
1.0
0.5
1.5
1.9
8.8
13.2
19
V
V
V
A
Ω
MHz
PAM8902H
Document number: DSxxxxx Rev. 1 - 0
4 of 12
www.diodes.com
December 2012
© Diodes Incorporated
A Product Line of
Diodes Incorporated
PAM8902H
Typical Operating Characteristics
(@T
A
= +25°C, V
DD
= 4.2V, Gain = 26dB, C
IN
= 1µF, C
LOAD
= 1µF, unless otherwise specified.)
PAM8902H
Document number: DSxxxxx Rev. 1 - 0
5 of 12
www.diodes.com
December 2012
© Diodes Incorporated
无线连接
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
