Diodes PAM8301 User Manual

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Description

The PAM8301 is a 1.5W Class-D mono audio amplifier. Its low
THD+N feature offers high quality sound reproduction. The new
filterless architecture allows the device to drive speaker directly
instead of using low-pass output filters, therefore saving system cost
and PCB area.

With the same number of external components, the efficiency of the
PAM8301 is much better than that of Class-AB cousins. It can
optimize battery life thus is ideal for portable applications.

The PAM8301 is available in TSOT26 package.

Features

 1.5W Output at 10% THD with a 8Ω Load and 5V Power Supply
 Filterless, Low Quiescent Current and Low EMI
 High Efficiency up to 88%
 Superior Low Noise
 Short Circuit Protection
 Thermal Shutdown
 Few External Components to Save Space and Cost
 Tiny TSOT26 Package

 Pb-Free Package

Typical Applications Circuit

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FILTERLESS CLASS-D MONO AUDIO AMPLIFIER

Pin Assignments

Top View

TSOT26

Applications

 PMP/MP4
 GPS
 Portable Speakers
 Walkie Talkie
 Handsfree Phones/Speaker Phones
 Cellular Phones

PAM8301

PAM8301

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Pin Descriptions

Pin

Number

1 OUT­2 GND
3 IN
4 SD
5 VDD
6 OUT+

Pin

Name

Negative Output
Ground
Input
Shutdown, Active Low
Power Supply
Positive Output

Functional Block Diagram

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PAM8301

Function

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 at No Input Signal 6.0
Input Voltage Range

Maximum Junction Temperature 150
Storage Temperature -65 to +150

Soldering Temperature 300, 5sec

Recommended Operating Conditions (@T

Parameter Rating Unit

Supply Voltage Range 2.5 to 5.5 V
Operation Temperature Range -40 to +85 °C
Junction Temperature Range -40 to +125 °C

PAM8301

Document number: DSxxxxx Rev. 1 - 3

= +25°C, unless otherwise specified.)

A

-0.3 to V

+0.3

DD

= +25°C, unless otherwise specified.)

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°C

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PAM8301

Thermal Information

Parameter Package Symbol Max Unit

Thermal Resistance (Junction to Ambient) TSOT26
Thermal Resistance (Junction to Case) TSOT26

Electrical Characteristics (@T

Symbol Parameter Test Conditions Min Typ Max Units

VDD

I

SHDN

VSH

VSL

R

DS(ON)

PO

THD+N Total Harmonic Distortion Plus Noise

PSRR AC Power Supply Ripple Rejection

GV
VN

f

OSC

SNR Signal to Noise Ratio f = 20 to 20kHz 78 dB
OTP Over Temperature Protection 135 °C
OTH Over Temperature Hysterisis 30 °C

Supply Voltage Range

Quiescent Current No Load 4 8 mA

IQ

Shutdown Current

SHDN Input High
SHDN Input Low

Drain-Source On-State Resistance

Output Power f = 1kHz

Gain
Output Noise
Oscillator Frequency

η Peak Efficiency f = 1kHz 85 88 %

= +25°C, VDD = 5V, Gain = 24dB, RL = 8Ω, unless otherwise specified.)

A

V

= 0V

SHDN

IDS = 100mA

= 8Ω, PO = 200mW

R

L

RL = 8Ω, PO = 0.5W
No Inputs, f = 1kHz, V

No A-Weighting 180
A-Weighting 120

θ

JA

θ

JC

= 200mV

PP

250
130

1 µA

P MOSFET 0.45
N MOSFET 0.20
THD+N = 1% 1.2
THD+N = 10% 1.5

°C/W

2.5 5.5 V

1.2

0.4

W

0.2

0.3

45 50 dB

24 dB

200 250 300 kHz

%

µV

V

Ω

PAM8301

Document number: DSxxxxx Rev. 1 - 3

3 of 10

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July 2013

© Diodes Incorporated