PAM8124 User Guide

PAM8124
EVB User Guide
PAM8124-EV Board User Guide
AE Department
1. Revision Information
Date
Revision
Description
2013/8/16
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.
PAM8124
Document number: DSxxxxx Rev. 1 - 0
1 of 8
www.diodes.com
August 2013
© Diodes Incorporated
PAM8124
EVB User Guide
2. PAM8124 General Description
The PAM8124 is a 15W efficient, Class-D audio power amplifier for driving stereo speakers
in a single-ended configuration; or a mono speaker in a bridge-tied-load configuration. The
PAM8124 can drive stereo speakers (SE) as low as 4Ω. Due to the low power dissipation
and high efficiency the device can be used without any external heat sink when playing
music.
The gain of the amplifier is controlled by 2 gain selectable pins, offering 20dB, 26dB, 32dB,
and 36dB gain selections.
The PAM8124 is available in a TSSOP-24 package.
3. Key Features
◆ 30W/Ch into 8Ω BTL Load from 22V Supply
◆ 15W/Ch into 4Ω SE Load from 22V Supply
◆ 10W/Ch into 8Ω SE Load from 24V Supply
◆ Operate from 10V to 26V
◆ Single-Ended Analog Inputs
◆ Supports Multiple Output Configurations:
- 2-Ch Single-Ended (SE, Half-Bridge)
- 1-Ch Bridge-Tied Load (BTL, Full-Bridge)
◆ Four Selectable Fixed-gain Settings
◆ No Pop Noise for Start-up and Shut-down Sequences
◆ Internal Oscillator (No External Components Required)
◆ High Efficient Class-D Operation Eliminates Need for Heat Sinks
◆ Thermal and Short-Circuit Protection with Auto Recovery
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.
PAM8124
Document number: DSxxxxx Rev. 1 - 0
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www.diodes.com
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© Diodes Incorporated
PAM8124
EVB User Guide
4. EV Board Schematic
C6
Vin
C7
IC1
1
2
SD
3
4
Mute
Lin
C1
Rin
C2
R1
5
R2
6
C3
7
8
9
10
C4
11
12
Vin
R3
C5
PVCCL
PGNDL
SD
PGNDL
PVCCL
LOUT
MUTE
BSL
LIN
AVCC
RIN
SE_BTL
VCM
GAIN0
AGND
GAIN1
AGND
BSR
PVCCR
ROUT
VCLAMP
PGNDR
PVCCR
PGNDR
AVCC
L_BTL
R4
C8
D1
24
23
R4
C12
C15
21
20
19
C19
AVCC
C16
L_GND
R_GND
Gain0
17
Gain1
C20
C21
C13
16
L2
15
14
R7
D2
13
R_SE
R7
R_BTL
R_BTL
C11
Vin
Mute
Gain0
Gain1
SE_BTL
1
AVCC
1
AVCC
1
AVCC
1
AVCC
1
AVCC
2
SD
2
Mute
2
Gain0
2
Gain1
2
SE_BTL
3
L_SE
SE_BTL
18
C10
SD
C18
L1
22
C9
AVCC
L_BTL
3
3
3
3
Figure 1
5. PAM8124 TB24AA
EVB Description
PAM8124 TB24AA is an evaluation board for the PAM8124, a stereo class-D audio power
amplifier. The board is targeted to be used in providing a simple and convenient evaluation
environment for the PAM8124. Requires parts, the audio inputs, pin jacks for power supply
and signal outputs etc. on the board make it easy to be evaluated.
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.
PAM8124
Document number: DSxxxxx Rev. 1 - 0
3 of 8
www.diodes.com
August 2013
© Diodes Incorporated
PAM8124
EVB User Guide
6. EV Board View and Jack Description
Top Layer
Power Supply
Ground
L-CH negative Output
L-CH positive Output
(Single-Ended)
(Single-Ended)
L-CH Audio Input
BTL-Output
negative
BTL-Output
positive
R-CH Audio Input
Output mode
SD Control
MUTE Control
G1 seting
G0 seting
select
R-CH negative
Output
R-CH Positive Output
(Single-Ended)
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.
PAM8124
Document number: DSxxxxx Rev. 1 - 0
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PAM8124
EVB User Guide
Bottom Layer
Copper Exposed for
Thermal Transfer
EV board operational sequence:
a. Connect SD to a high and MUTE to a low for normal operation
b. Connect audio input from audio input jack
c. Connect the loading(speaker or power resistor) to the output jack
d. Power on: DC power supply
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.
PAM8124
Document number: DSxxxxx Rev. 1 - 0
5 of 8
www.diodes.com
August 2013
© Diodes Incorporated
PAM8124
EVB User Guide
7. EV Board BOM List
Item
Value
Type
Rating
Description
Vender and port
C1,C2
1uF
X5R/X7R, Ceramic/0603
25V
Input coupling CAP
TMK107B7105KA-T
C3
1uF
X5R/X7R, Ceramic/0603
25V
VCM coupling CAP
TMK107B7105KA-T
C12,C13
1uF
X5R/X7R, Ceramic/0603
25V
High side driver bootstrap
TMK107B7105KA-T
C8, C9
0.1uF
X5R/X7R, Ceramic/0603
35V
PVDD coupling CAP,
GMK105BJ104KV-F
C7,C10
10uF
X5R/X7R, Ceramic/1210
35V
PVDD main coupling CAP,
GMK325BJ106MN-T
C15
0.1uF
X5R/X7R, Ceramic/0603
35V
AVCC coupling CAP
GMK105BJ104KV-F
C16
10uF
X5R/X7R, Ceramic/1210
35V
AVCC main coupling CAP
GMK325BJ106MN-T
C4
1uF
X5R/X7R, Ceramic/0603
25V
Vclamp coupling CAP
TMK107B7105KA-T
R1,R2,
0
0603
C6,C11,
470uF
Electrolytic
35V
C18,C21,
470uF
Electrolytic
35V
L1,L2
33uH
1.83A
0Ω
0603
4.7K
0603
R3
R4,R7,
IC1
CAP
Input Resistor
5%
Power supply decoupling CAP
Output
CAP
Output
inductance
TOKO
A7503CY-330M
Separate AVCC from PVDD
Discharge resistance
PAM8124
PAM
8. PCB Layout Example
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.
PAM8124
Document number: DSxxxxx Rev. 1 - 0
6 of 8
www.diodes.com
August 2013
© Diodes Incorporated
PAM8124
EVB User Guide
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.
PAM8124
Document number: DSxxxxx Rev. 1 - 0
7 of 8
www.diodes.com
August 2013
© Diodes Incorporated
PAM8124
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.
PAM8124
Document number: DSxxxxx Rev. 1 - 0
8 of 8
www.diodes.com
August 2013
© Diodes Incorporated