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PAM8620

Document number: DSxxxxx Rev. 1 - 0

1 of 13

www.diodes.com

June 2013

PAM8620

A Product Line of

Diodes Incorporated

15W STEREO CLASS-D AUDIO POWER AMPLIFIER WITH POWER LIMIT

Description

The PAM8620 is a 15W (per channel) stereo Class-

D audio amplifier

which offers low THD+N (0.2%), low EMI and good PSRRd thus high-

quality sound reproduction.

The PAM8620 runs off of an

8V to 26V supply at much higher

efficiency than competitors’ Ics.

The PAM8620 only requires very few external components,

significantly saving cost and board space.

The PAM8620 is available in a QFN5x5-32L package.

Features

• 15Wx2 Into a 8Ω Speaker

• Low Noise: -90dB

• Over 90% Efficiency

• Shutdown/ Mute Function

• Over Current ,OVP,UVLO,Thermal and Short-Circuit Protection

• Low THD+N

• Power Limit with Non-Clip

• Low Quiescent Current

• Pop Noise Suppression

• Small Package Outlines: QFN5x5-32L

• Pb-Free Package (RoHS Compliant)

Pin Assignments

Applications

• Flat Monitor /LCD TVs

• Multi-media Speaker System

• DVD Players, Game Machines

• Boom Box

• Music Instruments

Typical Applications Circuit

Summary of content (13 pages)

PAGE 1
A Product Line of Diodes Incorporated PAM8620 15W STEREO CLASS-D AUDIO POWER AMPLIFIER WITH POWER LIMIT Description Pin Assignments The PAM8620 is a 15W (per channel) stereo Class-D audio amplifier which offers low THD+N (0.2%), low EMI and good PSRRd thus highquality sound reproduction. The PAM8620 runs off of an 8V to 26V supply at much higher efficiency than competitors’ Ics. The PAM8620 only requires very few external components, significantly saving cost and board space.
PAGE 2
A Product Line of Diodes Incorporated PAM8620 Pin Descriptions Pin Number 1, 8, 17, 24 2 3 4 5 6 7 9, 16 10, 15 11 12 13 14 18 19 20 21 22 Package Name NC RINN RINP MUTE AVDD LINP LINN PGNDL PVCCL LOUTN BSLN BSLP LOUTP PL V2P5 AGND VCLAMP AVCC 23 SD 25, 32 26, 31 27 28 29 30 PGNDR PVCCR ROUTP BSRP BSRN ROUTN 33 Thermal Pad PAM8620 Document number: DSxxxxx Rev. 1 - 0 Function Not Connected Negative differential audio input for right channel. Positive differential audio input for right channel.
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A Product Line of Diodes Incorporated PAM8620 Functional Block Diagram Note: Maximum Gain: RI = 12.5k, RF = 100k Power Limit Function: RI and RF are adjustable. 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.
PAGE 4
A Product Line of Diodes Incorporated PAM8620 Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.) Parameter Rating Supply Voltage VCC Input Pin Voltage High Level Input Voltage: SD MUTE Low Level Input Voltage: SD MUTE Ambient Operating Temperature Unit 8 to 26 V 0 to 5.5 V 2.0 to VCC 2.0 to 5.5 0 to 0.3 0 to 0.
PAGE 5
A Product Line of Diodes Incorporated PAM8620 Electrical Characteristics (@TA = +25°C, VCC = 12V, RL =8Ω, unless otherwise specified.) Symbol PO THD+N Parameter Continuous Output Power Conditions THD+N = 0.25%, f = 1kHz, RL = 8Ω 15 Total Harmonic Distortion plus Noise PO = 7.5W, f = 1kHz, RL = 8Ω Quiescent Current (No Load) ISD Supply Quiescent Current in Shutdown Mode Shutdown = 0V Drain-Source On-State Resisitance IO = 0.
PAGE 6
A Product Line of Diodes Incorporated PAM8620 Typical Performance Characteristics (VCC = 24, RL = 8Ω, GV = 32dB, TA = +25°C, VCC = 12V, RL =8Ω, unless otherwise specified.) PAM8620 Document number: DSxxxxx Rev. 1 - 0 6 of 13 www.diodes.
PAGE 7
A Product Line of Diodes Incorporated PAM8620 Typical Performance Characteristics (cont.) (VCC = 24, RL = 8Ω, GV = 32dB, TA = +25°C, VCC = 12V, RL =8Ω, unless otherwise specified.) PAM8620 Document number: DSxxxxx Rev. 1 - 0 7 of 13 www.diodes.
PAGE 8
A Product Line of Diodes Incorporated PAM8620 Application Information Test Setup for Performance Testing Notes: 1. The AP AUX-0025 low pass filter is necessary for class-D amplifier measurement with AP analyzer. 2. Two 22μH inductors are used in series with load resistor to emulate the small speaker for efficiency measurement. MUTE Operation The MUTE pin is an input for controlling the output state of the PAM8620. A logic high on this pin disables the outputs and low enables the outputs.
PAGE 9
A Product Line of Diodes Incorporated PAM8620 Application Information (cont.) VCLAMP Capacitors To ensure that the maximum gate-to-source voltage for the NMOS output transistors not exceeded, a internal regulators are used to clamp the gate voltage. A 1μF capacitors must be connected from VCLAMP to ground and must be rated for at least 25V. The voltages at the VCLAMP terminals vary with VCC and may not be used to power any other circuitry.
PAGE 10
A Product Line of Diodes Incorporated PAM8620 Application Information (cont.) Power Limit (cont.) The output power vs PL pin resistor value as below. R(• ) 56K 62K 68K 75K 82K 91K 100K PL(V) 0.62 0.68 0.73 0.79 0.86 0.93 1.00 VCC = 24V, RLOAD = 8• PL(W) R(• ) 3.2 110K 3.8 120K 4.4 130K 5.2 150K 6.1 160K 7.1 180K 8.2 200K VCC = 12V, RLOAD = 8• PL(V) 1.08 1.15 1.23 1.36 1.43 1.55 1.66 PL(W) 9.6 11.0 12.4 15.5 17.0 19.9 22.9 R(• ) PL(V) PL(W) R(• ) PL(V) PL(W) 56 0.61 3.1 100K 0.99 8.
PAGE 11
A Product Line of Diodes Incorporated PAM8620 Ordering Information PAM8620 X X Package Type T: QFN5x5-32L Part Number PAM8620TR Part Marking PAM8620 XXXYWWLL Shipping & Package R: Tape & Reel Package Type Standard Package QFN5x5-32L 3000 Units/Tape&Reel Marking Information PAM8620 Document number: DSxxxxx Rev. 1 - 0 11 of 13 www.diodes.
PAGE 12
A Product Line of Diodes Incorporated PAM8620 Package Outline Dimensions (All dimensions in mm.) QFN5x5-32L PAM8620 Document number: DSxxxxx Rev. 1 - 0 12 of 13 www.diodes.
PAGE 13
A Product Line of Diodes Incorporated PAM8620 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).