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PAM8304

Document number: DS36589 Rev. 1 - 2

1 of 11

www.diodes.com

October 2013

PAM8304

NEW PRODUCT

Product Line o

Diodes Incorporated

3W MONO CLASS D AUDIO AMPLIFIER

Description

The PAM8304 is a mono filter-less Class-D amplifier with high SNR

and differential input that helps eliminate noise. The PAM8304

supports 2.8V to 6V operation make it idea for up to 4 cells alkaline

battery applications. The PAM8304 is capable of driving speaker

loads as low as 3Ω speaker with a 5V supply maximizing the output

power.

Features like greater than 90% efficiency and small PCB area make

the PAM8304 Class-D amplifier ideal for portable applications. The

output uses a filter-less architecture minimizing the number of

external components and PCB area whilst providing a high

performance, simple and lower cost system.

The PAM8304 features short circuit protection, thermal shutdown and

under voltage lock-out.

The PAM8304 is available in DFN3030-8L and MOP-8L packages.

Features

 Supply Voltage from 2.8V to 6.0 V

 3Ω Driving Capability

 3.0W@10% THD Output with a 4Ω Load and 5V Supply

 High Efficiency up to 90% @1W with an 8Ω Load

 Shutdown Current <1μA

 Superior Low Noise without Input

 Short Circuit Protection

 Thermal Shutdown

 Available in Space Saving DFN3030-8L and MSOP-8L

Packages

 Pb-Free Package

Pin Assignments

MSOP-8L

To p V i e w

DFN3X3-8L

To p V i e w

P8304

XXXYW

OUT+

PVDD

VDD

IN- IN+

GND

OUT-

P8304

XXXYW

OUT+

PVDD

VDD

IN- IN+

GND

OUT-

Applications

 MP4/MP3

 GPS

 Set-Top-Box

 Tablets/Digital Photo Frame

 Electronic Dictionary

 Portable Game Machines

Typical Applications Circuit

OUT-

OUT+

VDD

0.1 Fμ

VIN

GND

IN+

PAM8304

IN-

/SD

0.1 Fμ

1Fμ

PVDD

PGND

/SD

Summary of content (11 pages)

PAGE 1
A Product Line of Diodes Incorporated PAM8304 3W MONO CLASS D AUDIO AMPLIFIER Description Pin Assignments The PAM8304 is a mono filter-less Class-D amplifier with high SNR DFN3X3-8L Top View and differential input that helps eliminate noise. The PAM8304 supports 2.8V to 6V operation make it idea for up to 4 cells alkaline battery applications. The PAM8304 is capable of driving speaker OUT+ 1 power.
PAGE 2
A Product Line of Diodes Incorporated PAM8304 NEW PRODUCT Pin Descriptions Pin Name OUT+ PVDD VDD ININ+ MSOP-8L/DFN3x3-8L 1 2 3 4 5 /SD GND OUTExposed Pad 6 7 8 — Function Positive BTL Output Power Supply Analog Power Supply Negative Differential Input Positive Differential Input Shutdown Terminal, Active Low Ground Negative BTL Output NC Functional Block Diagram VDD IN+ PWM Modulator + IN- SD SD Bias and Vref OSC PVDD Gate Driv e OUT+ Gate Driv e OUT- UVLO SC Protec t Startup Protec
PAGE 3
A Product Line of Diodes Incorporated PAM8304 Electrical Characteristics (@TA=25°C, VDD=5V, Gain=18dB, RL=L(33μH)+R+L(33μH), unless otherwise noted.) Symbol VDD Parameter Supply Voltage Test Conditions NEW PRODUCT THD+N = 10%, f = 1kHz, R = 4Ω THD+N = 1%, f = 1kHz, R = 4Ω Po Output Power THD+N = 10%, f = 1kHz, R = 8Ω THD+N = 1%, f = 1kHz, R = 8Ω THD+N Total Harmonic Distortion Plus Noise VDD = 5.0V, Po = 1W, R = 8Ω VDD = 3.6V, Po = 0.1W, R = 8Ω VDD = 3.2V, Po =0.1W, R = 8Ω VDD = 5.0V, Po = 0.
PAGE 4
A Product Line of Diodes Incorporated PAM8304 Performance Characteristics (@TA=25°C, VDD=5V, Gain=18dB, RL=L(33μH)+R+L(33μH), unless otherwise noted.) THD+N Vs. Output Power (RL=4Ω) THD+N Vs. Output Power (RL=8Ω) 20 20 NEW PRODUCT 10 10 VDD=5.0V 5 VDD=5.0V 5 2 2 % 1 0.5 0.5 0.2 0.2 0.1 1m 2m 5m 10m 20m 50m 100m VDD=3.6V % VDD=3.6V 1 200m 500m 1 2 0.1 1m 5 W 2m 5m 10m 20m 50m 100m 200m 500m 1 2 3 W THD+N Vs. Frequency PSRR Vs.
PAGE 5
A Product Line of Diodes Incorporated PAM8304 Performance Characteristics (@TA=25°C, VDD=5V, Gain=18dB, RL=L(33μH)+R+L(33μH), unless otherwise noted.) Efficiency Vs. Output Power (RL=8Ω) NEW PRODUCT Efficiency Vs. Output Power (RL=4Ω) Quiescent Current Vs. Supply Voltage OSC Frequency Vs. Supply Voltage Start-up Response PAM8304 Document number: DS36589 Rev. 1 - 2 Shutdown Response 5 of 11 www.diodes.
PAGE 6
A Product Line of Diodes Incorporated PAM8304 Application Information Input Capacitors (Ci ) In the typical application an input capacitor Ci is required to allow the amplifier to bias the input signal to the proper DC level for optimum operation.
PAGE 7
A Product Line of Diodes Incorporated PAM8304 Application Information (cont.) Shutdown Operation In order to reduce power consumption while not in use the PAM8304 contains amplifier shutdown circuitry. When a logic low or ground is applied to the /SD pin the PAM8304 will enter a standby mode and supply current drawn will be minimized. Under Voltage Lock-out (UVLO) NEW PRODUCT The PAM8304 incorporates circuitry designed to detect low supply voltage. When the supply voltage drops to 2.
PAGE 8
A Product Line of Diodes Incorporated PAM8304 Ordering Information PAM8304 X X X NEW PRODUCT Pin Configuration A: 8 Pin Package Type Y: DFN3030 S: MSOP Shipping Package R: Tape & Real Part Number PAM8304AYR Package DFN3030-8L Standard Package 3,000Units/Tape&Real PAM8304ASR MSOP-8L 2,500Units/Tape&Real Marking Information DFN3030 /MOP8 PAM8304: Product Code X: Internal Code Y: Year W: Week PAM8304 Document number: DS36589 Rev. 1 - 2 8 of 11 www.diodes.
PAGE 9
A Product Line of Diodes Incorporated PAM8304 Package Outline Dimensions (All dimensions in mm.) NEW PRODUCT Package: DFN3030 DFN Unit: Millimeter PAM8304 Document number: DS36589 Rev. 1 - 2 9 of 11 www.diodes.
PAGE 10
A Product Line of Diodes Incorporated PAM8304 Package Outline Dimensions (All dimensions in mm.) NEW PRODUCT Package: MSOP REF Millimeter Min Max A -- 1.10 A1 0.05 0.15 A2 0.78 0.94 b 0.22 0.38 c 0.08 0.23 D 2.90 3.10 E 2.90 3.10 E1 4.75 5.05 e L PAM8304 Document number: DS36589 Rev. 1 - 2 0.65BSC 0.40 10 of 11 www.diodes.com 0.
PAGE 11
A Product Line of Diodes Incorporated PAM8304 IMPORTANT NOTICE NEW PRODUCT 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).