Diodes PAM8303D User Manual

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Description

The PAM8303D is a 3W mono filterless Class-D amplifier with high

PSRR and differential input that eliminate noise and RF rectification.

Features like 90% efficiency and small PCB area make the

PAM8303D Class-D amplifier ideal for cellular handsets. The filterless

architecture requires no external output filter, fewer external

components, less PCB area and lower system costs, and simplifies

application design.

The PAM8303D features short circuit protection and thermal

shutdown.

The PAM8303D is available in MSOP-8 and DFN3x3 8-pin packages.

MONO CLASS-D AUDIO POWER AMPLIFIER

Pin Assignments

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PAM8303D

ULTRA LOW EMI, 3W FILTERLESS

Features

• Ultra Low EMI, -20dB Better Than FCC Class-B @ 300MHz

• High Efficiency up to 90% @1W with an 8Ω Speaker

• Shutdown Current <1µA

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

• Demanding Few External Components

• Superior Low Noise without Input

• Supply Voltage from 2.8V to 5.5V

• Short Circuit Protection

• Thermal Shutdown

• Available in Space Saving Packages: MSOP-8, DFN3x3-8

• Pb-Free Package

PAM8303D

Document number: DSxxxxx Rev. 1 - 7

www.diodes.com

Applications

• Cellular Phones/Smart Phones

• MP4/MP3

• GPS

• Digital Photo Frame

• Electronic Dictionary

• Portable Game Machines

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Typical Applications Circuit

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PAM8303D

Pin Descriptions

Name

OUT+ 1 Positive BTL Output

PVDD 2 Power Supply

VDD 3 Analog Power Supply

IN- 4 Negative Differential Input

IN+ 5 Positive Differential Input

SD 6 Shutdown Terminal (active low)

GND 7 Ground

OUT- 8 Negative BTL Output

Number

Function

Functional Block Diagram

PAM8303D

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PAM8303D

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 250, 10 sec

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.)

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-0.3 to V

DD

+0.3

= +25°C, unless otherwise specified.)

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V

°C

Thermal Information

Parameter Package Symbol Max Unit

Thermal Resistance (Junction to Ambient)

Thermal Resistance (Junction to Case) MSOP-8

PAM8303D

Document number: DSxxxxx Rev. 1 - 7

MSOP-8

DFN3x3-8 47.9

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θ

JC

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180

75

°C/W

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PAM8303D

Electrical Characteristics (@T

Symbol Parameter Test Conditions Min Typ Max Units

VDD

PO

THD+N

PSRR Power Supply Ripple Rejection

Dyn Dynamic Range

VN

CMRR Common Mode Rejection Ratio

ISD

R

DS(ON)

RIN

fSW

GV

VOS

VIH

VIL

Supply Voltage

Output Power

Total Harmonic Distortion Plus Noise

Output Noise Inputs AC-Grounded

η Peak Efficiency

Quiescent Current

IQ

Shutdown Current

Static Drain-to-Source On-State Resistor

Input Resistance

Switching Frequency

Closed Loop Gain

Output Offset Voltage

Enable Input High Voltage

Enable Input Low Voltage

= +25°C, VDD = 5V, Gain = 2V/V, RL = L(33µH) + R + L(33µH), unless otherwise specified.)

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THD+N = 10%, f = 1KHz, R = 4Ω

THD+N = 1%, f = 1KHz, R = 4Ω

THD+N = 10%, f = 1KHz, R = 8Ω

THD+N = 1%, f = 1KHz, R = 8Ω

= 5.0V, PO = 1W, R = 8Ω

V

DD

VDD = 3.6V, PO = 0.1W, R = 8Ω

VDD = 3.2V, PO = 0.1W, R = 8Ω

VDD = 5.0V, PO = 0.5W, R = 4Ω

VDD = 3.6V, PO = 0.2W, R = 4Ω

VDD = 3.2V, PO = 0.1W, R = 4Ω

V

= 3.6V, Inputs AC-Grounded

DD

with C

= 1µF

IN

V

= 5V, THD = 1%, R = 8Ω

DD

= 5.0V

V

DD

VDD = 3.6V

VDD = 3.2V

V

= 5.0V

DD

VDD = 3.6V

VDD = 3.2V

= 5.0V

V

DD

VDD = 3.6V

VDD = 3.2V

= 5.0V

V

DD

VDD = 3.6V

VDD = 3.2V

f = 1kHz

f = 217Hz -63 -55

f = 1kHz -62 -55

f = 10kHz -52 -40

f = 1kHz 85 95

2.8 5.5 V

2.85 3.00

1.65 1.80

1.20 1.35

2.50 2.66

1.15 1.30

0.85 1.0

1.65 1.80

0.75 0.90

0.55 0.70

1.3 1.5

0.55 0.72

0.40 0.55

0.28 0.35

0.40 0.45

0.55 0.60

0.20 0.25

0.35 0.40

0.5 0.55

No A-Weighting 50 100

A-Weighting 30 60

V

= 100m, VPP, f =1kHz

IC

R

= 8Ω, THD = 10%

L

RL = 4Ω, THD = 10%

= 5.0V

V

DD

VDD = 3.6V

f = 1kHz

R = 8Ω

VDD = 3.0V

VDD = 3.0V to 5.0V VSD = 0.3V

= 5.0V

V

CSP Package, High Side PMOS plus Low Side NMOS,

I = 500mA

MSOP/DFN package, High Side PMOS plus Low Side NMOS, I = 500mA

DD

VDD = 3.6V

VDD = 3.0V

= 5.0V

V

DD

VDD = 3.6V

VDD = 3.0V

VDD = 3V to 5V

Input AC-Ground, VDD = 5V

VDD = 5V

40 63 dB

85 90

80 86 %

7.5 10

4.6 7.0

3.6 5.0 mA

0.5 2.0 µA

280 350

300 375

325 400

365 420

385 450

410 500

150 KΩ

200 250 300 KHz

300kΩ/R

dB

I

10 50 mV

1.5 V

0.3 V

W

%

dB

µV

PAM8303D

Document number: DSxxxxx Rev. 1 - 7

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Typical Performance Characteristics (@T

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PAM8303D

= +25°C, VDD = 5V, f = 1kHz, Gain = 2V/V, unless otherwise specified.)

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PAM8303D

Document number: DSxxxxx Rev. 1 - 7

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