Diodes PAM8004 User Manual

A

f

Description

The PAM8004 is a 3Wm 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, in order to save system

cost and PCB area.

With the same numbers of external components, the efficiency of the

PAM8004 is much better than that of Class-AB cousins. It can extend

the battery life, ideal for portable applications

The PAM8004 is available in SOP-16L package.

Features

 3W Output at 10% THD with a 3 Load and

 5V Power Supply

 2.5W 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

 Short Circuit Protection

 Thermal Shutdown

 Few External Components to Save the Space and Cost

 Pb-Free Package

Typical Applications Circuit

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PAM8004

FILTERLESS 3W CLASS-D STEREO AUDIO AMPLIFIER

Pin Assignments

Applications

 Portable Speakers

 LCD Monitors / TV

 Notebook Computers

 Portable DVD Players, Game Machines

PAM8004

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Pin Descriptions

Number

1 PVDDL 2 -OUTL 3 PGNDL 4 +OUTL 5 SHDN 6 VREF 7 INL 8 GND

9 VDD 10 INR 11 NC 12 NC 13 +OUTR 14 PGNDR 15 -OUTR 16 PVDDR

Name

Left Channel Power Supply

Left Channel Negative Output

Left Channel Power GND

Left Channel Positive Output

Shutdown Control Input (active low)

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

Left Channel Input

Analog Ground

Analog Power Supply

Right Channel Input

Not Connected (Suggest Connect to GND)

Not Connected

Right Channel Positive Output

Right Channel Power GND

Right Channel Negative Output

Right Channel Power Supply

Functional Block Diagram

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PAM8004

Function

PAM8004

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PAM8004

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, 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

= +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

Internal Power Dissipation @ TA = +25°C

PAM8004

Document number: DSxxxxx Rev. 1 - 0

SOP-16L

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

JA



JC

PD

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110

23

900 mW

°C/W

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PAM8004

Electrical Characteristics (@T

Symbol Parameter Test Conditions Min Typ Max Units

VIN

PO

THD+N

PSRR Power Supply Ripple Rejection

CS

SNR Signal-to-Noise

VN

ISD

R

DS(ON)

fsw Switching Frequency

VOS

VIH

VIL

OTP Over Temperature Protection

OTH Over Temperature Hysterisis 30

PAM8004

Document number: DSxxxxx Rev. 1 - 0

Supply Power

Output Power

Total Harmonic Distortion Plus Noise

Crosstalk

Output Noise

 Efficiency

Quiescent Current

IQ

Shutdown Current

Static Drain-to-Source On-State Resistor

Output Offset Voltage

Enable Input High Voltage

Enable Input Low Voltage

= +25°C, VDD = 5V, Gain = 24dB, R

A

= 8, unless otherwise specified.)

L

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

= 5.0V, Po = 0.5W, RL = 8

V

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

= 0V, V

IN

= 5.0V

DD

= 5.0V

DD

= 5V

No Load, Junction Temperature

= 5.0V

DD

= 5.0V

DD

= 5.0V

DD

= 5.0V

DD

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

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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

November 2012

°C