A Product Line of
Diodes Incorporated
PAM8603M
3W FILTERLESS STEREO CLASS-D AUDIO AMPLIFIER WITH DC VOLUME CONTROL
Description |
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Pin Assignments |
The PAM8603M is a 3W, sterero, Class-D audio amplifier with DC volume control. It offers low THD+N, allowing it to produce highquality sound reproduction. The new filterless architecture allows the device to drive the speaker directly, requiring no low-pass output filters, which saves the system cost and PCB area.
With the same numbers of external components, the efficiency of the PAM8603M is much better than class-AB cousins. It can extend the battery life thus ideal for portable applications.
The PAM8603M is available in SSOP-24 and SOP-18 packages.
Features
3W Output at 10% THD with a 4Ω Load and 5V Power Supply
Filterless, Low Quiescent Current and Low EMI
Low THD+N
64-Step DC Volume Control from -75dB to +24dB
Superior Low Noise
Efficiency up to 89%
Short Circuit Protection
Thermal Shutdown
Few External Components to Save the Space and Cost
Pb-Free Package
Applications
LCD Monitors/TV Projectors
Notebook Computers
Portable Speakers
Portable DVD Players, Game Machines
Cellular Phones/Speaker Phones
PAM8603M |
1 of 14 |
November 2012 |
Document number: DSxxxxx Rev. 1 - 1 |
www.diodes.com |
© Diodes Incorporated |
A Product Line of
Diodes Incorporated
PAM8603M
Typical Applications Circuit
Pin Descriptions
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Pin |
Package Name |
Function |
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Name |
SSOP-24 |
SOP-18 |
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+OUTL |
1 |
1 |
Left Channel Positive Output |
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PGNDL |
2, 3 |
2 |
Left Channel Power GND |
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-OUTL |
4 |
3 |
Left Channel Negative Output |
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PVDDL |
5 |
4 |
Left Channel Power Supply |
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6 |
5 |
Mute Control Input (active low) |
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MUTE |
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VDD |
7 |
6 |
Analog Power Supply |
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INL |
8 |
7 |
Left Channel Input |
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NC |
9, 12, 13, 15, 16 |
8 |
No Connection |
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VDC |
10 |
9 |
Analog reference for gain control section. |
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VOLUME |
11 |
10 |
DC volume control to set the gain of Class-D. |
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VREF |
14 |
11 |
Internal analog reference, connect a bypass capacitor from VREF to GND. |
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INR |
17 |
12 |
Right Channel Input |
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GND |
18 |
13 |
Analog Ground |
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19 |
14 |
Shutdown Control Input (active low) |
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SHDN |
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PVDDR |
20 |
15 |
Right Channel Power Supply |
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-OUTR |
21 |
16 |
Right Channel Negative Output |
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PGNDR |
22, 23 |
17 |
Right Channel Power GND |
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+OUTR |
24 |
18 |
Right Channel Positive Output |
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PAM8603M |
2 of 14 |
November 2012 |
Document number: DSxxxxx Rev. 1 - 1 |
www.diodes.com |
© Diodes Incorporated |
A Product Line of
Diodes Incorporated
PAM8603M
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.
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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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Maximum Junction Temperature |
150 |
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Storage Temperature |
-65 to +150 |
°C |
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Soldering Temperature |
300, 5sec |
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Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.) |
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Parameter |
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Rating |
Unit |
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Supply Voltage Range |
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2.8 to 5.5 |
V |
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Ambient Temperature Range |
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-40 to +85 |
°C |
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Junction Temperature Range |
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-40 to +125 |
°C |
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Thermal Information
Parameter |
Package |
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Symbol |
Max |
Unit |
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Thermal Resistance (Junction to Ambient) |
SSOP-24 |
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θJA |
96 |
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SOP-18 |
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70 |
°C/W |
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Thermal Resistance (Junction to Case) |
SSOP-24 |
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θJC |
18 |
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SOP-18 |
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16 |
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PAM8603M |
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3 of 14 |
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November 2012 |
Document number: DSxxxxx Rev. 1 - 1 |
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www.diodes.com |
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© Diodes Incorporated |
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A Product Line of |
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Diodes Incorporated |
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PAM8603M |
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Electrical Characteristics (@TA = +25°C, VDD = 5V, Gain = 20dB, unless otherwise specified.) |
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Symbol |
Parameter |
Test Conditions |
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Min |
Typ |
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Max |
Units |
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VDD |
Supply Power |
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2.8 |
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5.5 |
V |
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THD+N = 10%, f = 1kHz, RL |
= 4Ω |
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VDD = 5.0V |
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2.85 |
3.2 |
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W |
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VDD = 3.6V |
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1.55 |
1.8 |
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THD+N = 1%, f = 1kHz, RL = 4Ω |
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VDD = 5.0V |
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2.35 |
2.6 |
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W |
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PO |
Output Power |
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VDD = 3.6V |
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1.25 |
1.5 |
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THD+N = 10%, f = 1kHz, RL |
= 8Ω |
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VDD = 5.0V |
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1.55 |
1.8 |
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W |
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VDD = 3.6V |
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0.75 |
0.9 |
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THD+N = 1%, f = 1kHz, RL = 8Ω |
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VDD = 5.0V |
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1.15 |
1.4 |
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W |
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VDD = 3.6V |
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0.5 |
0.72 |
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VDD = 5.0V, Po = 0.5W, RL = 8Ω |
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f = 1kHz |
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0.15 |
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0.3 |
% |
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THD+N |
Total Harmonic Distortion Plus |
VDD = 3.6V, Po = 0.5W, RL = 8Ω |
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0.11 |
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0.25 |
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Noise |
VDD = 5.0V, Po = 1W, RL = 4Ω |
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f = 1kHz |
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0.15 |
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0.3 |
% |
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VDD = 3.6V, Po = 1W, RL = 4Ω |
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0.11 |
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0.25 |
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PSRR |
Power Supply Ripple Rejection |
VDD = 5.0V, Inputs AC-Grounded |
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f = 100Hz |
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-59 |
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-50 |
dB |
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f = 1kHz |
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-58 |
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-50 |
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CS |
Crosstalk |
VDD = 5.0V, Po = 0.5W, RL = 8Ω, f = 1kHz |
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-58 |
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dB |
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SNR |
Signal-to-Noise |
VDD = 5V, VO_RMS = 1V, f = 1kHz |
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85 |
-95 |
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-80 |
dB |
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VN |
Output Noise |
VDD = 5V, Inputs AC-Grounded with |
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A-weighting |
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98 |
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150 |
µV |
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CIN = 0.47μF |
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No A-weighting |
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120 |
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300 |
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Dyn |
Dynamic Range |
VDD = 5V, THD = 1%, f = 1kHz |
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90 |
102 |
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dB |
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η |
Efficiency |
RL = 8Ω, THD = 10% |
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f = 1kHz |
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85 |
89 |
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% |
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RL = 4Ω, THD = 10% |
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80 |
85 |
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IQ |
Quiescent Current |
VDD = 5.0V |
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No load |
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13.5 |
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20 |
mA |
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VDD = 3.6V |
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8.5 |
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15 |
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IMUTE |
Muting Current |
VDD = 5.0V, VMUTE = 0.3V |
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2.7 |
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5 |
mA |
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ISD |
Shutdown Current |
VDD = 2.5V to 5.5V, VSD = 0.3V |
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1 |
µA |
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RDS(ON) |
Static Drain-to-Source On-State |
IDS = 500mA,VGS = 5V |
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PMOS |
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240 |
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500 |
mΩ |
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Resistor |
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NMOS |
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180 |
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350 |
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fsw |
Switching Frequency |
VDD = 3V to 5V |
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200 |
260 |
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300 |
kHz |
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VOS |
Output Offset Voltage |
VIN = 0V, VDD = 5V |
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10 |
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50 |
mV |
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VIH |
SD/MUTE Input High |
VDD = 5V |
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1.45 |
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V |
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VIL |
SD/MUTE Input Low |
VDD = 5V |
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0.65 |
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OTP |
Over Temperature Protection |
No Load, Junction Temperature, VDD = 5V |
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135 |
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°C |
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OTH |
Over Temperature Hysterisis |
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30 |
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PAM8603M |
4 of 14 |
November 2012 |
Document number: DSxxxxx Rev. 1 - 1 |
www.diodes.com |
© Diodes Incorporated |
A Product Line of
Diodes Incorporated
PAM8603M
Typical Performance Characteristics (@TA = +25°C, unless otherwise specified.)
PAM8603M |
5 of 14 |
November 2012 |
Document number: DSxxxxx Rev. 1 - 1 |
www.diodes.com |
© Diodes Incorporated |
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