PAM8010 User Guide

PAM8010
EVB User Guide
PAM8010 EV Board User Guide
AE Department
1. Revision Information
Date
2011/05/19
Revision
V1.0
Description
Initial Release
Comment
2. EV Board Schematic
Speaker-L
SHDN
SD
1
2
3
VDD
Mute-D
C14
Speaker-R
C15
FB1
Mute-D
1
2
3
FB2
Mute-AB
Mute-AB
2
1
2
3
3
C13
C12
4
SD
R4
VDD
C1
5
6
7
R2
R1 8
9
V1
FB4
U1
VDD
Audio-in
C17
FB3
C9
1
VDD
C16
VDD
C4
C3
R6
R5
10
11
12
-OUT-L
-OUT-R
PGNDL
PGNDR
+OUT-L
+OUT-R
PVDDL
PVDDR
SHDN
AVDD
VREF
PL
EarInL
Mute-D
PAM8010
VDD
AGND
VTH
Mute-AB
EarInR
INL
INR
VOL
V2P5
EarOutL
EarOutR
24
23
22
C10
C11
21
20
VDD
Mute-D
19
R3
18
17
Mute-AB
16
15
14
R8
R7
C6
C2
C5
Ear PHONE
13
C7
C8
Figure 1 Demo Board Schematic
This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice.
No liability isassumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
PAM8010
EVB User Guide
3. PAM8010 Bemo Board Description
PAM8010 demo board is designed for PAM8010 demo and evaluation, targeted to be used in providing a
simple and convenient evaluation environment for the PAM8010. Requires parts, potentiometer for standard
RCA jacks for audio inputs, pin jacks for power supply and signal outputs, low-pass RC output filter for each
channel, etc. on the board make it easy to be evaluated.
Class
D
Output
4. EV Board View
Power Input
Mute-D
SHDN
Mute-AB
Volume
Control
Earphone
Output
Audio Input
Figure 2 Demo Board Top View
EV Board Operational Sequence:
a. Preset the power supply to between 2.5V and 5.5V.
b. Connect power supply to EV board power.
c.
Connect audio input from audio input jack.
d. Connect the SPKs to the BTL output jack.
e. Turn on the power supply and verify that the sound quality of speaker.
f.
Turn on the power supply and verify that the sound quality of speaker.
This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice.
No liability isassumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
PAM8010
EVB User Guide
EV Board BOM List
Item
C11,C13
C10,C12
C3,C4,C5,C6
C2
C1
VR1
C7,C8
FB1,FB2,FB3,FB4
C14,C15,C16,C17
Value
10uF
1uF
0.47uF
1uF
1uF
50K
220uF
2A/120Ω
1nF
Type
X5R/X7R,Ceramic/0805
X5R/X7R,Ceramic/0603
X5R/X7R,Ceramic/0805
X5R/X7R,Ceramic/0603
X5R/X7R,Ceramic/0603
Rating
10V
10V
10V
10V
10V
Electrolytic
0805
X5R/X7R,Ceramic/0603
10V
Description
PVDD main decoupling CAP
PVDD coupling CAP
Input coupling CAP
V2P5 bypass CAP
Vref bypass CAP
VOL Bias
Class AB output Blocking CAP
10V
For EMI
5. External Components Selection
Power Supply decoupling Caps (C10, C11, C12, C13)
(1) Low ESR for good THD, PSRR
(2) C10 andC12 1.0µF ceramic for higher frequency transients, spikes
(3) C11 and C13, additional 10µF or greater for low frequency noise filtering and serves as a local
storage capacitor for supplying current during large signal transients on the amplifier outputs
(4) Need place very closed to the IC
Input Capacitors (C3, C4, C5, C6)
(1) Form a high pass filter with Ri, and the cut off frequency is fc=1 /2∏R i*C i
(2) Low leakage current needed, ceramic recommend
Class AB Output Capacitors (C7, C8)
(1) Form a low pass filter with RL, and the cut off frequency is fc=1 /2∏R L*CO i
(2) Low leakage current needed
V2P5 Bypass Capacitor (C2)
(1) 1µF ceramic recommend
(2) Need place very closely to the pin for good THD, PSRR
This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice.
No liability isassumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
PAM8010
EVB User Guide
6. PCB Layout Guidelines
Grounding
(1) Use plane grounding or separate grounds
(2) Do not use one line connecting power GND and analog GND
(3) Output noise grounds must tie to system ground at the power in exclusively.
(4) Signal currents for the inputs need to be returned to quite ground. This ground only
ties to the signal components and the GND pin.
Others
(1) The power supply de coupling capacitors need to place very close to the PAM8010’s pins.
(2) The output route should be far away from audio input route.
7. PCB Layout Example
Top Layer
Bottom Layer
Figure 3
Figure 4
This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice.
No liability isassumed as a result of the use of this product. No rights under any patent accompany the sale of the product.