Diodes PAM8603M User Manual

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3W FILTERLESS STEREO CLASS-D AUDIO AMPLIFIER WITH DC VOLUME CONTROL

Description

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 4 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

Pin Assignments

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PAM8603M

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

PAM8603M

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Typical Applications Circuit

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Pin Descriptions

Name

+OUTL 1 1 Left Channel Positive Output

PGNDL 2, 3 2 Left Channel Power GND

-OUTL 4 3 Left Channel Negative Output

PVDDL 5 4 Left Channel Power Supply

MUTE 6 5 Mute Control Input (active low)

VDD 7 6 Analog Power Supply

INL 8 7 Left Channel Input NC 9, 12, 13, 15, 16 8 No Connection

VDC 10 9 Analog reference for gain control section.

VOLUME 11 10 DC volume control to set the gain of Class-D.

VREF 14 11 Internal analog reference, connect a bypass capacitor from VREF to GND.

INR 17 12 Right Channel Input

GND 18 13 Analog Ground

SHDN 19 14 Shutdown Control Input (active low)

PVDDR 20 15 Right Channel Power Supply

-OUTR 21 16 Right Channel Negative Output PGNDR 22, 23 17 Right Channel Power GND +OUTR 24 18 Right Channel Positive Output

PAM8603M

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Package Name

SSOP-24 SOP-18

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Function

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Functional Block Diagram

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PAM8603M

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 2.8 to 5.5 V Ambient 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)

Thermal Resistance (Junction to Case)

SSOP-24

SOP-18 70

SSOP-24

SOP-18 16



JA



JC

96

18

°C/W

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Electrical Characteristics (@T

Symbol Parameter Test Conditions Min Typ Max Units

VDD

PO

THD+N

PSRR Power Supply Ripple Rejection

CS

SNR Signal-to-Noise

VN

Dyn Dynamic Range

I

MUTE

ISD

R

DS(ON)

fsw Switching Frequency VOS

VIH SD/MUTE Input High

VIL SD/MUTE Input Low

OTP Over Temperature Protection OTH Over Temperature Hysterisis 30

PAM8603M

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Supply Power

Output Power

Total Harmonic Distortion Plus Noise

Crosstalk

Output Noise

 Efficiency

Quiescent Current

IQ

Muting Current Shutdown Current Static Drain-to-Source On-State

Resistor

Output Offset Voltage

= +25°C, VDD = 5V, Gain = 20dB, unless otherwise specified.)

A

= 5.0V

V

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

= 4

L

THD+N = 1%, f = 1kHz, RL = 4

THD+N = 10%, f = 1kHz, RL = 8

THD+N = 1%, f = 1kHz, RL = 8 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

= 5.0V, Inputs AC-Grounded

V

DD

V

= 5.0V, Po = 0.5W, RL = 8, f = 1kHz

DD

V

= 5V, V

DD

V

= 5V, Inputs AC-Grounded with

DD

= 0.47F

C

IN

V

= 5V, THD = 1%, f = 1kHz

DD

R

= 8, THD = 10%

L

= 1V, f = 1kHz

O_RMS

RL = 4, THD = 10%

= 5.0V

V

DD

V

= 3.6V

DD

V

= 5.0V, V

DD

V

= 2.5V to 5.5V, VSD = 0.3V

DD

I

= 500mA,VGS = 5V

DS

= 3V to 5V

V

DD

V

= 0V, V

IN

= 5V

V

DD

V

= 5V

DD

MUTE

= 5V

= 0.3V

No Load, Junction Temperature, V

DD

= 5V

DD

VDD = 3.6V

= 5.0V

V

DD

VDD = 3.6V

= 5.0V

V

DD

VDD = 3.6V

= 5.0V

V

DD

VDD = 3.6V

f = 1kHz

f = 100Hz -59 -50

f = 1kHz -58 -50

A-weighting 98 150

No A-weighting 120 300

f = 1kHz

No load

PMOS 240 500 NMOS 180 350

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2.8 5.5 V

2.85 3.2

1.55 1.8

2.35 2.6

1.25 1.5

1.55 1.8

0.75 0.9

1.15 1.4

0.5 0.72

0.15 0.3

0.11 0.25

0.15 0.3

0.11 0.25

W

%

dB

-58 dB

85 -95 -80 dB

µV

90 102 dB 85 89 80 85

13.5 20

8.5 15

%

mA

2.7 5 mA 1 µA

m

200 260 300 kHz

10 50 mV

1.45

0.65 135

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V

°C

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Typical Performance Characteristics (@T

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= +25°C, unless otherwise specified.)

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