Diodes PAM8403H User Manual

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Description

The PAM8403H is a 3W, class-D audio amplifier. It offers low THD+N, allowing it to achieve high quality sound reproduction. The new filterless architecture allows the device to drive the speaker directly, requiring no low-pass output filters, thus saving system cost and PCB area.

With the same numbers of external components, the efficiency of the PAM8403H is much better than that of class-AB cousins. It can extend the battery life, ideal for portable applications.

The PAM8403H is available in SOP-16 package.

Features

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PAM8403H

FILTERLESS 3W CLASS-D STEREO AUDIO AMPLIFIER

Pin Assignments

 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  Pb-Free Package

Applications

 LCD Monitors / TV Projectors  Notebook Computers  Portable Speakers  Portable DVD Players, Game Machines  Cellular Phones/Speaker Phones

PAM8403H

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Typical Applications Circuit

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PAM8403H

Pin Descriptions

Pin Number Pin Name Function

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

-OUT_L PGND

+OUT_L

PVDD MUTE

VDD

INL

VREF

NC INR

GND SHDN PVDD

+OUT_R

PGND

-OUT_R

PAM8403H

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Left Channel Negative Output Power GND Left Channel Positive Output Power V Mute Control Input（active low） Analog V Left Channel Input Internal analog reference, connect a bypass capacitor from VREF to GND No connected Right Channel Input Analog GND Shutdown Control Input (active low) Power V Right Channel Positive Output Power GND Right Channel Negative Output

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Functional Block Diagram

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PAM8403H

Absolute Maximum Ratings (@T

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

Supply Voltage Range 6.0 Input Voltage Operation Temperature Range -40 to +85 Maximum Junction Temperature 150 Operation Junction Temperature -40 to +125 Storage Temperature -65 to 150

Soldering Temperature 300, 5sec

Recommended Operating Conditions (@T

Parameter Rating Unit

Supply Voltage Range 2.5 to 5.5 V Operation Temperature Range -40 to +85 °C Junction Temperature Range -40 to +125 °C

PAM8403H

Document number: DSxxxxx Rev. 1 - 0

= +25°C, unless otherwise specified.)

A

-0.3 to V

+0.3

DD

= +25°C, unless otherwise specified.)

A

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V

°C

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PAM8403H

Thermal Information

Parameter Package Symbol Max Unit

Thermal Resistance (Junction to Ambient) SOP-16 Thermal Resistance (Junction to Case) SOP-16 Internal Power Dissipation (@ TA = +25°C)

Note: 1. The maximun output current for SOT23-5 package is limited by internal power dissipation capacity as described in Application Information here inafter.

SOP-16



PD

JA JC

Electrical Characteristics (@T

= +25°C, VDD = 5V, Gain = 24dB, RL = 8, unless otherwise specified.)

A

Symbol Parameter Test Conditions Min Typ Max Units

VIN

PO

Supply Voltage 2.5 5.5 V

= 4 V

L

Output Power

THD+N = 10%,f = 1kHz , R THD+N =1%, f = 1kHz, RL = 4 V THD+N =10%,f = 1kHz, RL = 8 V THD+N = 1%, f = 1kHz, RL = 8 V V

= 5.0V,PO = 0.5W, RL = 8

THD+N

GV

PSRR

CS

Total Harmonic Distortion Plus Noise

Gain 23 24 25 dB Power Supply Ripple

Rejection Crosstalk

SNR Signal-to-Noise Ration

VN

IQ

I

MUTE

ISD

VOS

VIH VIL VIH VIL

Output Noise Quiescent Current

Muting Current Shutdown Current Output Offset Voltage Enable Input High Voltage Enable Input LowVoltage MUTE Input High Voltage MUTE Input Low Voltage

DD

VDD = 5.0V, PO = 1W, RL = 4

V

= 5.0V, Inputs AC-grounded with

DD

= 0.47F

C

IN

VDD = 5V, PO = 0.5W, RL = 8, GV = 20dB V

= 5V, V

DD

= 5V, Inputs AC-Grounded with

V

DD

= 0.47F

C

IN

= 1V,GV = 20dB

ORMS

VDD = 5.0V VDD = 5.0V V VDD = 2.5V to 5.5V V VIN = 0V, VDD = 5V VDD = 5.0V VDD = 5.0V VDD = 5.0V VDD = 5.0V

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110

23

°C/W

90 mW

= 5.0V

DD

= 5.0V

DD

= 5.0V

DD

= 5.0V

DD

2.85 3.20 W

2.25 2.50 W

1.5 1.8 W

1.2 1.4 W f = 1kHz 0.15 0.20 % f = 1kHz 0.15 0.20 %

f = 100Hz -59 -50 dB

f = 1kHz -58 -50 dB f = 1kHz -95 -80 dB f = 1kHz 74 80 dB

A-weighting 100 200

No A-weighting 150 300 µV

No load 16 20 mA

MUTE

SD

= 0.3V

8 12 mA 20 µA

10 mV

1.5 V

0.4 V

1.5 V

0.4 V

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