PAM8407 User Guide

PAM8407
EVB User Guide
PAM8407 EV Board User Guide
AE Department
1. Revision Information
Date
Revision
Description
2013/10
V1.0
Initial release
Comment
This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
PAM8407
Document number: DSxxxxx Rev. 1 - 0
1 of 6
www.diodes.com
October 2013
© Diodes Incorporated
PAM8407
EVB User Guide
2. Key Features
‹
3W Output at 10% THD with a 4Ω load and 5V Power Supply
‹
2.4W Output at 1% THD with a 4Ω Load and 5V Power Supply
‹
Filterless, Low Quiescent Current and Low EMI
‹
Low THD+N
‹
32-step Digital Volume Control from -80dB(mute) to 24dB
‹
Superior Low Noise: 60uV
‹
Minimize Pop/Clip Noise
‹
High Efficiency up to 90%
‹
Auto Recovery Short Circuit Protection
‹
Thermal Shutdown
‹
Pb-Free Package
3. EV Board Schematic
C9
TP1
C1
RINP
C2
RINN
1
2
IC1
R1
R2
SD
SD
UP
VDD
SD
DOWN
3
1
2
3
4
5
6
C3
LINN
C4
LINP
R5
R3
R4
7
RINP
C5
VDD
RINN
ROUTP
SD
ROUTN
UP
GND
DOWN
GND
GND
LOUTN
LINN
LOUTP
C6
16
15
14
ROUTP
VDD
ROUTP
ROUTN
LINP
VDD
FB2
C12
2
C11
C13
TP3
R7
LOUTN
LOUTP
LOUTN
VDD
8
1
TP2
12
10
ROUT
FB1
R6
ROUTN
13
11
C10
9
LOUTP
C7
C8
C14
LOUT
FB3
1
FB4
2
R8
C16
C15
TP4
This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
PAM8407
Document number: DSxxxxx Rev. 1 - 0
2 of 6
www.diodes.com
October 2013
© Diodes Incorporated
PAM8407
EVB User Guide
4. EV-Board PAM8407 EB37AA Description
PAM8407 EB37AA is designed for evaluated PAM8407. The PAM8407 is a 3W, class-D
audio amplifier. Advanced 32-step Digital volume control minimizes external components
and allows speaker volume control. The board is targeted to be used in providing a simple
and convenient evaluation environment for the PAM8407.
5. EV Board View and Jack Description
Ground
Power Supply
R-CH Positive Input
R-CH Negative Input
R-CH
Positive Output
R-CH Single-ended
signal Input
R-CH
Negative Output
L-CH
L-CH Single-ended
Negative Output
signal Input
L-CH
Positive Output
L-CH Negative
L-CH Positive Input
SD Control
Volume UP Control
Volume DOWN Control
This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
PAM8407
Document number: DSxxxxx Rev. 1 - 0
3 of 6
www.diodes.com
October 2013
© Diodes Incorporated
PAM8407
EVB User Guide
6. EV board operational sequence:
a. Connect SD to a high for normal operation.
b. To use the PAM8407 with a differential source, connect the positive lead of the audio
source to the INP input and the negative lead of the audio source to the INN input. To use
the PAM8407 with a single-ended source, the INN input should be ac- grounded.
c. Connect the loading(speaker or power resistor) to the output jack.
d. Power on: 2.7V to 5.5V DC power supply.
7. EV Board BOM List
Item
Value
Type
Rating
Description
Vender and port
C1,C2,
C3,C4
0.1uF
X5R/X7R,
Ceramic/0603
25V
Input coupling
CAP
TAIYO YUDEN
C5, C7
1uF
X5R/X7R,
Ceramic/0603
25V
VDD coupling
CAP,
C6, C8
10uF
X5R/X7R,
Ceramic/0805
16V
VDD main
coupling CAP,
R1,R2,
R3,R4
0ohm
0603
1%
Input Resistor
IC1
PM8407
SOP-16L
UMK212B7104KG-T
TAIYO YUDEN
TMK107B7105KA-T
TAIYO YUDEN
EMK212ABJ106KD-T
This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
PAM8407
Document number: DSxxxxx Rev. 1 - 0
4 of 6
www.diodes.com
October 2013
© Diodes Incorporated
PAM8407
EVB User Guide
8. PCB Layout Example
Top layer
This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
PAM8407
Document number: DSxxxxx Rev. 1 - 0
5 of 6
www.diodes.com
October 2013
© Diodes Incorporated
PAM8407
EVB User Guide
Bottom layer
This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
PAM8407
Document number: DSxxxxx Rev. 1 - 0
6 of 6
www.diodes.com
October 2013
© Diodes Incorporated