Data Sheet

ManualsBrandsDFRobot ManualsAudio Synthesis3W Audio Stereo Amplifier

Key Features

Applications

3W Output at 10% THD with a 4 Load and

5V Power Supply

Filterless, Low Quiescent Current and Low

EMI

Low THD+N

Superior Low Noise

Efficiency up to 90%

Short Circuit Protection

Thermal Shutdown

Few External Components to Save the

Space and Cost

LCD Monitors / TV Projectors

Notebook Computers

Portable Speakers

Portable DVD Players, Game Machines

Cellular Phones/Speaker Phones

directly

system cost

It can extend the battery life,

ideal for portable applications.

General Description

The PAM8403 is a 3W, class-D audio amplifier. It

offers low THD+N, allowing it to produce high-

quality sound reproduction. The new filterless

architecture allows the device to drive the speaker

, without needing low-pass output filters

which will save the and PCB area.

With the same numbers of external components,

the efficiency of the PAM8403 is much better than

class-AB cousins.

The PAM8403 is available in a DIP-16 and SOP-

16 packages.

Pb-Free Package

Typical Application

PAM8403

Filterless 3W Class-D Stereo Audio Amplifier

English:www.poweranalog.com www.power-analog.com：

100

00.511.522.53

Output Pow er(W)

Efficiency(%)

RL=8Ω

RL=4Ω

Efficiency vs Output Power

-OUT_L

PGND PGND

+OUT_L

+OUT_R

-OUT_R

PVDD PVDD

SHDN

VDD

GN D

INL

INR

VREF

1uF

1uF 1uF470uF

VDD PVDD

0.47uF

1uF

921511

INL

INR

PAM8403

MU T E

GN D

SH DN

MU TE

FCC Class B Limit

Radiated Emissions

03/2007

,Power Analog Microelectronics Inc

Summary of content (12 pages)

PAGE 1
PAM8403 Filterless 3W Class-D Stereo Audio Amplifier Key Features General Description n 3W Output at 10% THD with a 4 Ω Load and 5V Power Supply n Filterless, Low Quiescent Current and Low EMI n Low THD+N n Superior Low Noise n Efficiency up to 90% n Short Circuit Protection n Thermal Shutdown n Few External Components to Save the Space and Cost n Pb-Free Package The PAM8403 is a 3W, class-D audio amplifier. It offers low THD+N, allowing it to produce highquality sound reproduction.
PAGE 2
PAM8403 Filterless 3W Class-D Stereo Audio Amplifier Block Diagram VDD PVDD PGND VDD/2 + - INR +OUT_R DRIVER -OUT_R MODULATOR Attenuation Decoder Interface Control MUTE SHDN Thermal Protection INTERNAL OSCILLATOR BIAS AND REFERENCES OSC Current Protection +OUT_L MODULATOR INL VREF DRIVER + -OUT_L VDD/2 GND PVDD PGND Pin Configuration & Marking Information Top View DIP-16 Top View SOP-16 1 16 2 15 1 16 14 3 14 13 4 12 5 6 11 6 7 10 7 10 8 9 8 9 3 4 5 PA
PAGE 3
PAM8403 Filterless 3W Class-D Stereo Audio Amplifier Pin Descriptions Pin Number Pin Name Description 1 -OUT_L Left Channel Negative Output 2 PGND 3 +OUT_L 4 PVDD Power VDD 5 MUTE Mute Control Input（active low） 6 VDD Analog VDD 7 INL Left Channel Input 8 VREF 9 GND Analog GND 10 INR Right Channel Input 11 GND Analog GND 12 SHDN Shutdown Control Input(active low) 13 PVDD Power VDD 14 +OUT_R 15 PGND 16 -OUT_R Power GND Left Channel Positive Output Internal analog
PAGE 4
PAM8403 Filterless 3W Class-D Stereo Audio Amplifier Electrical Characteristic V DD=5V, Gain = 18.5dB, R L=8 Ω( Note 1 ), T A=25℃，unless otherwise noted. PARAMETER Supply Voltage Range Quiescent Current SYMBOL CONDITIONS MIN VDD IQ TYP 2.5 No Load 10 RL=8Ω 11 RL=4Ω 12 MAX UNITS 5 V 15 mA Mute Current IMUTE VMUTE=0V 1.
PAGE 5
PAM8403 Filterless 3W Class-D Stereo Audio Amplifier Typical Operating Characteristics (T =25°C) A 1. THD+N vs Output Power 100 100 50 20 V DD=3.3V 20 V DD=3.3V 10 10 5 5 2 % 2. THD+N vs Output Power 50 2 V DD=2.5V 1 % 0.5 0.5 0.2 0.2 0.1 V DD=2.5V 1 V DD=5V 0.1 0.05 0.05 V DD=5V 0.02 0.02 0.01 20m 50m 100m 200m 500m 1 2 0.01 20m 4 50m 100m 200m W V DD=5V, R L=4 Ω , Gain = 18.5dB 3. THD+N vs Output Power % 50 50 20 20 10 10 5 5 2 f=1KHz % 0.5 0.
PAGE 6
PAM8403 Filterless 3W Class-D Stereo Audio Amplifier Typical Operating Characteristics (continued) 7. THD+N vs. Frequency 100 100 50 50 20 20 10 10 5 5 2 2 % 8. THD+N vs. Frequency V DD=3.3V 1 % 1 0.5 0.5 0.2 0.2 V DD=3.3V 0.1 0.1 0.05 0.05 V DD=5V V DD=5V 0.02 0.02 0.01 20 0.01 20 50 100 200 500 1k 2k 5k 10k 20k 50 100 200 500 Hz 1k 2k 5k 10k 20k Hz Po=0.1W,R L=8 Ω, Gain=18.5dB Po=0.8W,R L=4 Ω, Gain=18.5dB 10.
PAGE 7
PAM8403 Filterless 3W Class-D Stereo Audio Amplifier make the device damaged. Therefore, it's recommended to use either 4 Ni-MH (Nickel Metal Hydride) rechargeable batteries or 3 dry or alkaline batteries. Application Notice 1. When the PAM8403 works with LC filters, it should be connected with the speaker before it's powered on, otherwise it will be damaged easily. 4. It should not make the input signal too high, which will cause the clipping of output signal when increasing the volume.
PAGE 8
PAM8403 Filterless 3W Class-D Stereo Audio Amplifier Application Information Maximum Gain hash on the line, a good low equivalent-seriesresistance (ESR) ceramic capacitor, typically 1.0μF, placed as close as possible to the device V DD terminal works best. For filtering lowerfrequency noise signals, a larger capacitor of 20μF(ceramic) or greater placed near the audio power amplifier is recommended. As shown in block diagram(page 2),the PAM8403 has two internal amplifiers stage.
PAGE 9
PAM8403 Filterless 3W Class-D Stereo Audio Amplifier Application Information (continued) Short Circuit Protection (SCP) from power on/off and entering and leaving shutdown. The PAM8403 has short circuit protection circuitry on the outputs that prevents damage to the device during output-to-output and output-toGND short. When a short circuit is detected on the outputs, the outputs are disable immediately. If the short was removed, the device activates again.
PAGE 10
PAM8403 Filterless 3W Class-D Stereo Audio Amplifier Ordering Information PAM8403 X X Shipping Package Type Part Number PAM8403QT PAM8403DT PAM8403DR Marking Package Type Standard Package DIP -16 30 Units/Tube SOP-16 50 Units/Tube SOP-16 2,500 Units/Tape&Reel PAM8403 XATYWWLL PAM8403 XATYWWLL PAM8403 XATYWWLL Please consult PAM sales office or authorized Rep ./ Distributor for detailed ordering information. Power Analog Microelectronics , Inc English:www.poweranalog.com ：www.power-analog.
PAGE 11
PAM8403 Filterless 3W Class-D Stereo Audio Amplifier Outline Dimension DIP-16 L 0.018typ. 0.060typ. D 0.100typ. H E1 A2 E A1 eθ θο A Symbols MIN TYP MAX A - - 0.210 A1 0.015 - - A2 0.125 - - D 0.735 0.755 0.775 E 0.300 BSC. E1 0.245 0.250 0.255 L 0.115 0.130 0.150 eθ 0.335 0.355 0.375 0 7 15 o θ Unit: Inch Power Analog Microelectronics , Inc English:www.poweranalog.com ：www.power-analog.
PAGE 12
PAM8403 Filterless 3W Class-D Stereo Audio Amplifier Outline Dimension A1 A A2 SOP-16 B D E E1 L C θ e Symbol Dimensions Millimeters Min Max A 1.350 1.750 A1 0.100 0.250 A2 1.350 1.550 B 0.330 0.510 C 0.190 0.250 D 9.800 10.000 E 3.800 4.000 E1 5.800 6.300 e 1.270(TYP) L 0.400 1.270 θ 0º 8º Power Analog Microelectronics , Inc English:www.poweranalog.com ：www.power-analog.