Diodes PAM8003 User Manual

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Description

The PAM8003 is a 2.5W, 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

PAM8003 is much better than that of class-AB cousins. It can extend

the battery life, ideal for portable applications.

The PAM8003 is available in SOP-16L package

Features

 2.5W Output at 10% THD with a 5 Load and 5V Power Supply

 Filterless, Low Quiescent Current and Low EMI

 Low THD+N

 64-Step DC Volume Control

 Superior Low Noise

 Short Circuit Protection

 Thermal Shutdown

 Few External Components to Save the Space and Cost

 RoHS Pass and Green Package

Typical Applications Circuit

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PAM8003

FILTERLESS 2.5W CLASS-D STEREO AUDIO AMPLIFIER

Pin Assignments

Applications

 LCD Monitors / TV

 Notebook Computers

 Portable Speakers

 Portable DVD Players, Game Machines

PAM8003

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Pin Descriptions

Pin

Number

1 PVDDL Left Channel Power Supply

2 -OUTL Left Channel Negative Output

3 PGNDL Left Channel Power GND

4 +OUTL Left Channel Positive Output

5 SHDN Shutdown Control Input (active low)

6 VREF Internal Analog Reference, Connect a Bypass Capacitor from VREF to GND

7 INL Left Channel Input

8 GND Analog Ground

9 VDD Analog Power Supply

10 INR Right Channel Input

11 NC Not Connected

12 VOLUME DC Volume Control to Set the Gain of Class-D

13 +OUTR Right Channel Positive Output

14 PGNDR Right Channel Power GND

15 -OUTR Right Channel Negative Output

16 PVDDR Right Channel Power Supply

Pin

Name

Function

Functional Block Diagram

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PAM8003

PAM8003

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PAM8003

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 6.0

Input Voltage

Maximum Junction Temperature 150

Storage Temperature -65 to +150

Soldering Temperature 300, 5 sec

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

= +25°C, unless otherwise specified.)

A

-0.3 to V

DD

+0.3

= +25°C, unless otherwise specified.)

A

V

°C

Thermal Information

Parameter Package Symbol Max Unit

Thermal Resistance (Junction to Ambient) SOP-16L

Thermal Resistance (Junction to Case) SOP-16L



JA



JC

110

23

°C/W

PAM8003

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Electrical Characteristics (@T

= +25°C, VDD = 5V, Gain = 24dB, R

A

= 8, unless otherwise specified.)

L

Symbol Parameter Test Conditions Min Typ Max Units

VIN

PO

THD+N

Supply Power

Output Power

Total Harmonic Distortion Plus
Noise

PSRR Power Supply Ripple Rejection

CS

Crosstalk

SNR Signal-to-Noise

VN

Output Noise

 Efficiency

Quiescent Current

IQ

ISD

R

DS(ON)

Shutdown Current

Static Drain-to-Source On-State
Resistor

fsw Switching Frequency

VOS

VIH

VIL

Output Offset Voltage

Enable Input High Voltage

Enable Input Low Voltage

OTP Over Temperature Protection

OTH Over Temperature Hysterisis 30

THD+N = 10%, f = 1kHz, R

= 4 V

L

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

DD

V

= 3.6V, Po = 0.5W, RL = 8

DD

V

= 5.0V, Po = 1W, RL = 4

DD

V

= 3.6V, Po = 1W, RL = 4

DD

V

= 5.0V, Inputs AC-Grounded with

DD

C

= 0.47F, Gv = 6dB

IN

V

= 5V, Po = 0.5W, RL = 8,

DD

Gv = 20dB

V

= 5V, Gv = 6dB

DD

V

= 5V, Inputs AC-Grounded with

DD

= 0.47F, GV = 6dB

C

IN

R

= 8, THD = 10%

L

RL = 4, THD = 10%

= 5.0V

V

DD

V

= 3.6V

DD

V

= 3.0V

DD

V

= 2.5V to 5.5V

DD

I

= 500mA,VGS = 5V

DS

V

= 3V to 5V

DD

V

V

V

= 0V, V

IN

= 5.0V

DD

= 5.0V

DD

DD

= 5V

No Load, Junction Temperature

= 5.0V

DD

= 5.0V

DD

= 5.0V

DD

= 5.0V

DD

f = 1kHz

f = 1kHz

f = 1kHz -70 dB

f = 1kHz -93 dB

f = 1kHz 86 dB

A-weighting 33

No A-weighting 50

f = 1kHz

No load

1 µA

PMOS 0.41

NMOS 0.27

210 kHz

10 mV

1.5

0.4

V

= 5V

DD

2.5 5.5 V

2.5 W

2.2 W

1.65 W

1.3 W

0.16

0.12

0.17

0.26

%

%

µV

87

79

%

4.5 7.0

4.0 6.5

mA

3.7 5.5

m

V

150

°C

PAM8003

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