PAM8407DR Datasheet PAM8407DR | P1-P3

PAM8407

Document number: DS36815 Rev. 1 - 2

1 of 12

www.diodes.com

January 2014

PAM8407

New Product

A PRODUCT LINE OF

DIODES INCORPORATED

2x3W Stereo Differential Input Class D Audio Amplifier

with U

p

/Down Volume Control

Description

The PAM8407 is a filter-less Class-D amplifier with high SNR and

differential input that helps eliminate noise. Advanced 32-step

Up/Down volume control minimizes external components and allows

speaker volume control.

The PAM8407 supports 2.5V to 6V operation make it idea for up to 4

cells alkaline battery applications.

Features like greater than 87% efficiency and small PCB area make

the PAM8407 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 PAM8407 built in auto recovery SCP (short circuit protection) and

thermal shutdown.

The PAM8407 is available in SO-16 package.

Features

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

 2.4W Output at 1% THD with a 4Ω Load and 5V Supply

 2.5V to 6.0V VDD Operating

 Fully Differential Input

 Filterless, Low Quiescent Current and Low EMI

 Low THD+N

 32-stepUp/Down Volume Control from -80dB to 24dB

 Superior Low Noise: 60uV

 Minimize Pop/Clip Noise

 Auto Recovery Short Circuit Protection

 Thermal Shutdown

 Pb-Free SO-16 Package

Pin Assignments

SO-16

LOUTP

LOUTN

UP

VDD

ROUTP

VDD

ROUTN

GND

15

9

10

11

12

13

14

16

GND

RINN

GND

DOWN

LINN

SD

1

2

3

4

5

6

7

8

PAM8407

XXXYWWLL

RINP

LINP

Applications

 PC Speaker

 Wireless Speaker

 Home Sound Systems

 Active Speakers

 Docking stations

Typical Applications Circuit

6 GND

GND 13

5 DOWN

7 LINN

VDD 16

8 LINP

GND 12

1 RINP

ROUTN 14

2 RINN

ROUTP 15

LOUTP 10

VDD 9

4 UP

3 SD

LOUTN 11

PAM8407

01. uF

C6

V

DD

4Ω

1uF

C2

RINN

01.

uF

C8

LINP

SHDN

ON

01. uF

C5

RINP

01. uF

C7

LINN

4Ω

V

DD

1uF

C2

PAM8407

Document number: DS36815 Rev. 1 - 2

2 of 12

www.diodes.com

January 2014

PAM8407

New Product

A PRODUCT LINE OF

DIODES INCORPORATED

2x3W Stereo Differential Input Class D Audio Amplifier

with U

p

/Down Volume Control

Pin Descriptions

PIN Number PIN Name Description

1 RINP Positive Input of Right Channel Power Amplifier.

2 RINN Negative Input of Right Channel Power Amplifier.

3 SD Full Chip Shutdown Control Input (active low).

4 UP Volume UP Control (active low)Ground Connection.

5 DOWN Volume down Control (active low)

6,12,13 GND Ground.

7 LINN Negative Input of Left Channel Power Amplifier.

8 LINP Positive Input of Left Channel Power Amplifier.

9,16 VDD Power Supply.

10 LOUTP Positive Output of Left Channel Power Amplifier.

11 LOUTN Negative Output of Left Channel Power Amplifier.

14 ROUTN Negative Output of Right Channel Power Amplifier.

15 ROUTP Positive Output of Right Channel Power Amplifier.

Functional Block Diagram

In te rfa ce Co n tr o l

Attenuation Decoder

VDD

RINP

LIN N

VDD

GND

LOU TP

LOU TN

ROUTN

ROUTP

GND

MODULATOR

DRIVER

INTERNAL

OSCILLATOR

OSC

BIAS

AND

REFERENCES

MO DULAT OR

DRIVER

Thermal

Protection

Current

Protection

DOWN

SD

VDD

+

-

RINN

UP

+

-

LINP

VDD

Absolute Maximum Ratings (@T

A

= +25°C, unless otherwise specified.)

Parameter Rating Unit

Supply Voltage (VDD) 6.5

V

Pins Input Voltage (SD, UP, Down, IN) -0.3 to VDD+0.3

V

Storage Temperature -65 to +150

°C

Maximum Junction Temperature +150

°C

Junction to ambient thermal resistance 40

°C/W

PAM8407

Document number: DS36815 Rev. 1 - 2

3 of 12

www.diodes.com

January 2014

PAM8407

New Product

A PRODUCT LINE OF

DIODES INCORPORATED

2x3W Stereo Differential Input Class D Audio Amplifier

with U

p

/Down Volume Control

Recommended Operating Conditions (@T

A

= +25°C, unless otherwise specified.)

Symbol Parameter Min Max Unit

V

DD

Supply Voltage 2.5 6.0 V

T

A

Operating Ambient Temperature Range -40 +85 °C

T

J

Junction Temperature Range -40 +125 °C

Electrical Characteristics (@TA=25°C, VDD=5.0V, Gain=24dB, RL=8Ω (33μH)+R+L(33μH), unless otherwise noted.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage Range

V

DD

— 2.5 — 5.5 V

Quiescent Current

I

Q

No Load —

8 — mA

Output Offset Voltage

V

OS

No Load —

10 — mV

Drain-Source On-State

Resistance

R

DS(ON)

I

DS

= 0.5A

P MOSFET —

0.3 —

Ω

N MOSFET — 0.2 —

Output Power

P

O

THD+N = 1%,

f = 1kHz

R

L

= 8Ω

—

1.4 —

W

R

L

= 4Ω

—

2.4 —

Total Harmonic Distortion Plus

Noise

THD+N

R

L

= 8Ω，P

O

= 0.85W, f = 1KHz

—

0.08 —

%

R

L

= 4Ω，P

O

= 1.75W, f = 1KHz

—

0.08 —

Power Supply Ripple Rejection PSRR Input AC-GND, f = 1KHz, Vpp = 200mV — 70 — dB

Channel Separation CS

P

O

= 1W, f = 1KHz

—

-95 — dB

Oscillator Frequency

f

OSC

— 200 250 300 kHz

Efficiency η

P

O

= 1.1W,f = 1kHz, R

L

= 8Ω

— 87 — %

P

O

= 2.4W,f = 1kHz, R

L

= 4Ω

— 83 — %

Noise Vn

Input

AC-GND

A-weighting — 60 —

μV

No A-weighting — 80 —

Signal Noise Ratio SNR f = 20-20kHz, THD = 1% — 95 — dB

Turn-on Time Ton VDD = 5V — 0.65 — S

Mute Current

I

MUTE

MUTE = VDD — 4 10 mA

Shutdown Current

I

SD

V

SD

= 0V

— — 1 µA

Logic Input High

V

IH

Include SD, UP, DOWN 1.4 — — V

Logic Input Low

V

IL

Include SD, UP, DOWN — — 0.6 V

Over Temperature Protection OTP — — 150 — °C

Over Temperature Hysteresis OTH — — 40 — °C

PAM8407DR

PAM8407DR

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