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PAM8603A

Document number: DSxxxxx Rev. 1 - 2

1 of 16

www.diodes.com

November 2012

PAM8603A

Product Line o

Diodes Incorporated

ANTI-SATURATION FILTERLESS 3W CLASS-D STEREO AMPLIFIER

WITH DC VOLUME CONTROL AND HEADPHONE OUTPUT

Description

The PAM8603A is a 3W, Class-D audio amplifier with headphone

amplifier. Advanced 64-Step DC volume control minimizes external

components and allows speaker volume control and headphone

volume control. PAM unique antisaturation technology which detects

output signal clip due to the over level input signal suppress the

output signal clip automatically. Also the antisaturation function can

adapt the output clip caused by power supply voltage down with

battery. It offers low THD+N, to produce highquality sound

reproduction. The new filterless architecture allows the device to

drive the speaker directly, without low-pass output filters which will

save system cost and PCB area.

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

PAM8603A is much better than Class-AB cousins. It can extend the

battery life thus be ideal for portable applications.

The PAM8603A is available in a SSOP-24 package.

Features

• 3W Output at 10% THD with a 4Ω Load and 5V Power Supply

• Filterless, Low Quiescent Current and Low EMI

• Low THD+N

• 64-Step DC Volume Control

• Headphone Output Function

• Unique Anti-Saturation Function

• Superior Low Noise

• Low Pop Noise

• Efficiency Up to 90%

• Short Circuit Protection

• Thermal Shutdown

• Few External Components to Save the Space and Cost

• Pb-Free Package

Pin Assignments

Applications

• LCD Monitors / TV Projectors

• Notebook Computers

• Portable Speakers

• Portable DVD Players, Game Machines

• VoIP/Speakers Phones

Summary of content (16 pages)

PAGE 1
A Product Line of Diodes Incorporated PAM8603A ANTI-SATURATION FILTERLESS 3W CLASS-D STEREO AMPLIFIER WITH DC VOLUME CONTROL AND HEADPHONE OUTPUT Description Pin Assignments The PAM8603A is a 3W, Class-D audio amplifier with headphone amplifier. Advanced 64-Step DC volume control minimizes external components and allows speaker volume control and headphone volume control.
PAGE 2
A Product Line of Diodes Incorporated PAM8603A Typical Applications Circuit Pin Descriptions Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Pin Name +OUT_L PGNDL PGNDL -OUT_L PVDDL MUTE VDD IN L EAR IN L VDC VOLUME EAR OUT L EAR OUT R VREF LINE/EAR EAR IN R INR GND SHDN PVDDR -OUT_R PGNDR PGNDR +OUT_R Function Left Channel Positive Output Left Channel Power GND Left Channel Positive GND Left Channel Negative Output Left Channel Power Supply Mute Control Input (active low) Anal
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A Product Line of Diodes Incorporated PAM8603A Functional Block Diagram Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.) 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 Supply Voltage Input Voltage Maximum Junction Temperature Storage Temperature Soldering Temperature Rating 6.0 Unit V -0.3 to VDD +0.
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A Product Line of Diodes Incorporated PAM8603A Electrical Characteristics (@TA = +25°C, VDD = 5V, Gain = Maximum, RL = 8Ω, unless otherwise specified.) Parameter Class D Stage Supply Voltage Range Quiescent Current Output Offset Voltage Drain-Source On-State Resistance Output Power Symbol IQ No Load VOS No Load RDS(ON) PO THD+N Power Supply Ripple Rejection PSRR Channel Separation CS Oscillator Frequency fOSC Noise η VN Min Typ 2.
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A Product Line of Diodes Incorporated PAM8603A Typical Performance Characteristics (@TA = +25°C, VDD = 5V, RL = 8Ω, GV = 24dB, unless otherwise specified.) Class-D Output PAM8603A Document number: DSxxxxx Rev. 1 - 2 5 of 16 www.diodes.
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A Product Line of Diodes Incorporated PAM8603A Typical Performance Characteristics (cont.) (@TA = +25°C, VDD = 5V, RL = 8Ω, GV = 24dB, unless otherwise specified.) Class-D Output PAM8603A Document number: DSxxxxx Rev. 1 - 2 6 of 16 www.diodes.
PAGE 7
A Product Line of Diodes Incorporated PAM8603A Typical Performance Characteristics (cont.) (@TA = +25°C, unless otherwise specified.) Earphone Output PAM8603A Document number: DSxxxxx Rev. 1 - 2 7 of 16 www.diodes.
PAGE 8
A Product Line of Diodes Incorporated PAM8603A Typical Performance Characteristics (cont.) (@TA = +25°C, unless otherwise specified.) PAM8603A Document number: DSxxxxx Rev. 1 - 2 8 of 16 www.diodes.
PAGE 9
A Product Line of Diodes Incorporated PAM8603A Typical Performance Characteristics (cont.) (@TA = +25°C, VDD = 5V, GV = 10dB, unless otherwise specified.) PAM8603A Document number: DSxxxxx Rev. 1 - 2 9 of 16 www.diodes.
PAGE 10
A Product Line of Diodes Incorporated PAM8603A Typical Performance Characteristics (cont.) (@TA = +25°C, unless otherwise specified.) Table 1. DC Volume Control STEP 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 PAM8603A Document number: DSxxxxx Rev. 1 - 2 Gain (dB) Class D -75 -40 -34 -28 -22 -16 -10 -7.5 -5.0 -2.5 0 1.5 3.0 4.0 4.4 4.8 5.2 5.6 6.0 6.4 6.8 7.2 7.6 8.0 8.4 8.8 9.2 9.6 10.0 10.4 10.8 11.
PAGE 11
A Product Line of Diodes Incorporated PAM8603A Application Information Test Setup for Performance Testing (Class D) 1. When the PAM8603A works with LC filters, it should be connected with the speaker before it's powered on, otherwise it will be damaged easily. 2. When the PAM8603A works without LC filters, it's better to add a ferrite chip bead at the outgoing line of speaker for suppressing the possible electromagnetic interference. 3. The absolute maximum rating of the PAM8603A operation voltage is 6V.
PAGE 12
A Product Line of Diodes Incorporated PAM8603A Application Information Power Supply Decoupling The PAM8603A is a high performance CMOS audio amplifier that requires adequate power supply decoupling to ensure the output THD and PSRR are as low as possible. Power supply decoupling affects low frequency on the power supply leads for higher frey response.
PAGE 13
A Product Line of Diodes Incorporated PAM8603A Application Information How to Reduce EMI (Electro Magnetic Interference) A simple solution is to put an additional capacitor 1000µF at power supply terminal for power line coupling if the traces from amplifier to speakers are short (< 20CM). Most applications require a ferrite bead filter as shown at Figure 1. The ferrite filter reduces EMI around 1MHz and higher.
PAGE 14
A Product Line of Diodes Incorporated PAM8603A Ordering Information Part Number PAM8603ANHR Package Type SSOP-24 Standard Package 2500 Units/Tape&Reel Marking Information PAM8603A Document number: DSxxxxx Rev. 1 - 2 14 of 16 www.diodes.
PAGE 15
A Product Line of Diodes Incorporated PAM8603A Package Outline Dimensions (All dimensions in mm.) SSOP-24 PAM8603A Document number: DSxxxxx Rev. 1 - 2 15 of 16 www.diodes.
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A Product Line of Diodes Incorporated PAM8603A IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).