A Product Line of
Diodes Incorporated
PAM8902H
30 VPP MONO CLASS-D AUDIO AMPLIFIER FOR PIEZO/CERAMIC SPEAKERS
Description |
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Pin Assignments |
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.
Features
•Supply Voltage Range From 2.5V to 5.5V
•30 VPP 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 |
1 of 12 |
December 2012 |
Document number: DSxxxxx Rev. 1 - 0 |
www.diodes.com |
© Diodes Incorporated |
A Product Line of
Diodes Incorporated
PAM8902H
Typical Applications Circuit
Pin Descriptions
Pin Name |
Bump (CSP) |
Pin Number (QFN) |
Function |
PVCC |
A1 |
16 |
Audio Amplifier Power Supply |
VOUT |
A2 |
1 |
Boost Convertor Output |
SW |
A3 |
2 |
Boost Convertor Switching Node |
PGND1 |
A4 |
4 |
Boost Convertor Power Ground |
OUT+ |
B1 |
15 |
Positive Differential Audio Output |
VSET |
B2 |
3 |
Boost Convertor Output Voltage Setting (8V,12V,17.5V) |
COMP |
B3 |
5 |
Boost Convertor compensation |
AVDD |
B4 |
6 |
Power Supply |
OUT- |
C1 |
14 |
Negative Differential Audio Output |
GSET |
C2 |
11 |
Amplifier Gain setting ( 21dB , 26dB , 32.5dB) |
VCM |
C3 |
7 |
Common Mode bypass Cap |
AGND |
C4 |
8 |
Analog Ground |
PGND2 |
D1 |
13 |
Class D Power Ground |
ENA |
D2 |
12 |
Whole chip Enable |
INN |
D3 |
10 |
Negative Differential Audio Input |
INP |
D4 |
9 |
Positive Differential Audio Input |
PAM8902H |
2 of 12 |
December 2012 |
Document number: DSxxxxx Rev. 1 - 0 |
www.diodes.com |
© Diodes Incorporated |
A Product Line of
Diodes Incorporated
PAM8902H
Functional Block Diagram
Absolute Maximum Ratings (@TA = +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 |
Rating |
Unit |
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Supply Voltage |
6.0 |
V |
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Input Voltage |
-0.3 to VDD +0.3 |
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Storage Temperature |
-65 to 150 |
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Maximum Junction Temperature |
150 |
°C |
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Soldering Temperature |
250, 10sec |
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Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.)
Parameter |
Rating |
|
Unit |
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Supply Voltage Range |
2.5 to 5.5 |
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V |
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Ambiient Temperature Range |
-40 to +85 |
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°C |
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Junction Temperature Range |
-40 to +125 |
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PAM8902H |
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3 of 12 |
December 2012 |
Document number: DSxxxxx Rev. 1 - 0 |
|
www.diodes.com |
© Diodes Incorporated |
|
A Product Line of
Diodes Incorporated
PAM8902H
Thermal Information
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Parameter |
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Symbol |
Package |
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Maximum |
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Unit |
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Thermal Resistance |
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θJA |
CSP |
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90 |
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°C/W |
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(Junction to Ambient) |
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QFN4x4-16 |
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52 |
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Thermal Resistance |
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θJC |
CSP |
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72 |
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°C/W |
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(Junction to Case) |
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QFN4x4-16 |
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30 |
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Electrical Characteristics (@TA = +25°C, VDD = 3.6V, CL = 1µF, VSET Float, unless otherwise specified.) |
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Symbol |
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Parameter |
Conditions |
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Min |
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Typ |
Max |
Unit |
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VDD |
Input Voltage |
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2.5 |
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5.5 |
V |
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EN > 1.2V, VSET = High |
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30 |
48 |
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IQ |
Quiescent Current |
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EN > 1.2V, VSET = Floating |
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10 |
18 |
mA |
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EN > 1.2V, VSET = GND |
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5 |
12 |
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ISD |
Shutdown Current |
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EN = 0V |
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0.1 |
1.0 |
µA |
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TWU |
Wake-Up Time |
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EN From Low to High |
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40 |
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mS |
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VEH |
Chip Enable |
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1.2 |
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V |
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VEL |
Chip Disable |
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0.4 |
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VH |
GSET/VSET High |
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VDD -0.5 |
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VDD |
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VF |
GSET/VSET Floating |
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1 |
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VDD -1 |
V |
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VL |
GSET/VSET Low |
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0 |
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0.5 |
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UVLO |
Under Voltage Lockout Threshold |
VDD From High to Low |
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2.2 |
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V |
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UVLOH |
Under Voltage Lockout Hysteresis |
VDD From Low to High |
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0.2 |
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OTP |
Thermal Shutdown Threshold |
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150 |
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°C |
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OTPH |
Thermal Shutdown Lockout Hysteresis |
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30 |
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°C |
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Boost Converter |
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VO1 |
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VSET = GND, No Load |
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7.2 |
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8.0 |
8.8 |
V |
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VO2 |
Output Voltage |
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VSET = NC, No Load |
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10.8 |
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12.0 |
13.2 |
V |
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VO3 |
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VSET = AVDD, No Load |
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16 |
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17.5 |
19 |
V |
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CL |
Current Limit |
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Average Input Current |
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1.0 |
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A |
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RLS |
Low Side MOSFET RDS(ON) |
IO = 50mA |
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0.5 |
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Ω |
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fOSCB |
Boost Switching Frequency |
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1.1 |
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1.5 |
1.9 |
MHz |
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Class-D |
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fOSCD |
Class-D Amplifier Switching Frequency |
Input AC-GND |
|
225 |
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375 |
475 |
KHz |
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CMRR |
Common Mode Reject Ratio |
VIN = ±100mV, VDD = 3.6V |
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60 |
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dB |
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VOS |
Output Offset Voltage |
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Output Offset Voltage |
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5 |
50 |
mV |
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RP |
RDS(ON) |
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High Side |
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1.5 |
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Ω |
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Low Side |
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0.6 |
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Ω |
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AV1 |
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GSET = AVDD, VO = 1VRMS |
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32.5 |
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AV2 |
Closed-Loop Voltage Gain |
GSET = AVDD, VO = 1VRMS |
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26 |
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dB |
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AV3 |
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GSET = AVDD, VO = 1VRMS |
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21 |
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PSRR |
Power Supply Reject Ratio |
200m VPP Supply Ripple @ 217Hz |
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70 |
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dB |
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THD+N |
Total Harmonice Distortion Plus Noise |
VO = 5VRMS |
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0.3 |
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% |
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SNR |
Signal to Noise Ratio |
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Input AC Ground, A-Weighting |
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90 |
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dB |
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PAM8902H |
|
4 of 12 |
|
|
|
|
December 2012 |
||||||
|
Document number: DSxxxxx Rev. 1 - 0 |
|
www.diodes.com |
|
|
|
|
© Diodes Incorporated |
||||||
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