Instruction Manual

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PAM8406

Document number: DSxxxxx Rev. 1 - 0

1 of 14

www.diodes.com

March 2013

PAM8406

Product Line o

Diodes Incorporated

ALTERNATIVE 5W STEREO AUDIO AMPLIFIER

Description

The PAM8406 is a 5W audio amplifier with an alternative option

between Class-D and Class-AB output which makes PAM8406 very

ideally for the applications efficiency-EMI compatible.

PAM8406 offers low THD+N, high SNR allowing it to achieve high-

quality sound reproduction. The fully differential output wi th new filter

less architecture (Class-D Mode) allows the device to drive the

speaker directly, requiring no low-pass output filters and DC blocking

capacitors, thus to save the system cost and PCB area.

The efficiency of the PAM8406 is up to 90%. It can extend the battery

life, ideally for portable applications. The PAM8406 is fully protected

against faults with short circuit protection and thermal protection.

The PAM8406 is available in SOP-16L/SOP-16(EP) package.

Features

 Alternative Output: Class-D or Class-AB

 5W Output at 10% THD with a 2Ω Load and 5V Power Supply

at Class-D Mode

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

 Filterless, Low Quiescent Current and No EMI

 Low THD+N at Fully Output Range

 Superior Low Noise

 Efficiency up to 90% with Class-D Mode

 No Pop At Turn-on/off

 Fully Short Circuit Protection With Auto Recovery

 Thermal Shutdown

 Few External Components to Save the Space and Cost

 SOP-16L/SOP-16(EP) Package

Pin Assignments

Applications

 LCD TVs

 Mutimedia Speakers

 AM/FM System

 DABs

Typical Applications Circuit

Summary of content (14 pages)

PAGE 1
A Product Line of Diodes Incorporated PAM8406 ALTERNATIVE 5W STEREO AUDIO AMPLIFIER Description Pin Assignments The PAM8406 is a 5W audio amplifier with an alternative option between Class-D and Class-AB output which makes PAM8406 very ideally for the applications efficiency-EMI compatible. PAM8406 offers low THD+N, high SNR allowing it to achieve highquality sound reproduction.
PAGE 2
A Product Line of Diodes Incorporated PAM8406 Pin Descriptions Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Pin Name +OUT_L PGNDL -OUT_L PVDDL MUTE VDD INL VREF MODE INR GND SHND PVDDR -OUT_R PGNDR +OUT_R Function Left Channel Positive Output Power GND Left Channel Negative Output Power VDD Mute Control Input (active low) Analog VDD Left Channel Input Internal analog reference, connect a bypass capacitor from VREF to GND.
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A Product Line of Diodes Incorporated PAM8406 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 Operation Temperature Range Maximum Junction Temperature Operation Junction Temperature Storage Temperature Soldering Temperature Rating 6.
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A Product Line of Diodes Incorporated PAM8406 Electrical Characteristics (@TA = +25°C, VDD = 5V, Gain = 24dB, RL = 8Ω, both Class-AB and D mode, unless otherwise specified.) Symbol VDD Parameter Test Conditions THD+N = 1%, f = 1KHz, RL = 2Ω (Class-D) THD+N = 10%, f = 1KHz, RL = 4Ω Output Power THD+N = 1%, f = 1KHz, RL = 4Ω THD+N = 10%, f = 1KHz, RL = 8Ω THD+N = 1%, f = 1KHz, RL = 8Ω VDD = 5.0V 5.0 VDD = 3.6V 2.6 VDD = 2.5V 1.3 VDD = 5.0V 4.0 VDD = 3.6V 2.0 VDD = 2.5V 1.0 VDD = 5.0V 3.
PAGE 5
A Product Line of Diodes Incorporated PAM8406 Electrical Characteristics (cont.) (@TA = +25°C, VDD = 5V, Gain = 24dB, RL = 8Ω, both Class-AB and D mode, unless otherwise specified.) Symbol IMUTE ISD RDS(ON) Parameter Test Conditions VMUTE = 0.3V 2.4 mA VDD = 2.5V to 5.5V VSD = 0.3V PMOS NMOS <1 µA 180 140 mΩ Class-D 250 kHz 10 mV Static Drain-to-Source On-State Resistor IDS = 500mA, VGS = 5V Switching Frequency VDD = 2.5V to 5.5V Input AC-GND, VDD = 5.
PAGE 6
A Product Line of Diodes Incorporated PAM8406 Typical Performance Characteristics (@TA = +25°C, VDD = 5V, Gain = 24dB, RL = 8Ω, both Class-AB and D mode, unless otherwise specified.) PAM8406 Document number: DSxxxxx Rev. 1 - 0 6 of 14 www.diodes.
PAGE 7
A Product Line of Diodes Incorporated PAM8406 Typical Performance Characteristics (cont.) (@TA = +25°C, VDD = 5V, Gain = 24dB, RL = 8Ω, both Class-AB and D mode, unless otherwise specified.) PAM8406 Document number: DSxxxxx Rev. 1 - 0 7 of 14 www.diodes.
PAGE 8
A Product Line of Diodes Incorporated PAM8406 Typical Performance Characteristics (cont.) (@TA = +25°C, VDD = 5V, Gain = 24dB, RL = 8Ω, both Class-AB and D mode, unless otherwise specified.) PAM8406 Document number: DSxxxxx Rev. 1 - 0 8 of 14 www.diodes.
PAGE 9
A Product Line of Diodes Incorporated PAM8406 Application Information Application Note 1. When the PAM8406 works in Class-D with LC filters, it should be connected with the speaker before it's powered on, otherwise it will be damaged easily. 2. When the PAM8406 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 recommended operating voltage is 5.5V.
PAGE 10
A Product Line of Diodes Incorporated PAM8406 Application Information (cont.) Power Supply Decoupling The PAM8406 is a high performance CMOS audio amplifier that requires adequate power supply decoupling to ensure the output THD and PSRR as low as possible. Power supply decoupling affects low frequency response. Optimum decoupling is achieved by using two capacitors of different types targeting to different types of noise on the power supply leads.
PAGE 11
A Product Line of Diodes Incorporated PAM8406 Ordering Information Part Number PAM8406DR PAM8406ER Part Marking PAM8406 XATYWWLL PAM8406 XATYWWLL Package Type Standard Package SOP-16 2500 Units/Tape&Reel SOP-16(EP) 2500 Units/Tape&Reel Marking Information PAM8406 Document number: DSxxxxx Rev. 1 - 0 11 of 14 www.diodes.
PAGE 12
A Product Line of Diodes Incorporated PAM8406 Package Outline Dimensions (All dimensions in mm.) SOP-16 PAM8406 Document number: DSxxxxx Rev. 1 - 0 12 of 14 www.diodes.
PAGE 13
A Product Line of Diodes Incorporated PAM8406 Package Outline Dimensions (All dimensions in mm.) SOP-16(EP) PAM8406 Document number: DSxxxxx Rev. 1 - 0 13 of 14 www.diodes.
PAGE 14
A Product Line of Diodes Incorporated PAM8406 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).