User's Guide
SLOU234 – April 2009
TPA2017D2 Audio Power Amplifier EVM
Contents
1 Introduction ................................................................................................................... 1
2 Operation ..................................................................................................................... 2
3 Schematic and Bill of Materials ............................................................................................ 3
List of Figures
1 EVM Schematic .............................................................................................................. 3
2 Top Side Layout.............................................................................................................. 4
3 Bottom Side Layout .......................................................................................................... 4
List of Tables
1 Gain Settings ................................................................................................................. 2
1 Introduction
1.1 Description
The TPA2017D2 is a stereo, filter-free Class-D audio power amplifier with automatic gain control (AGC),
dynamic range compression (DRC). The AGC and DRC functions enhance the perceived audio loudness,
and at the same time prevent speaker damage from overdrive. Availability in the QFN package makes
TPA2017D2 an ideal choice for laptop and portable applications. The TPA2017D2 evaluation module
(EVM) is a complete, stand-alone audio board. It contains the TPA2017D2 QFN (RTJ) Class-D audio
power amplifier.
The TPA2017D2 evaluation module (EVM) is a complete stand-alone audio board. All components are
Pb-free.
1.2 TPA2017D2EVM Specifications
Supply voltage range, V
Supply current, I
Speaker amplifier output power per channel, PO: 4 Ω , V
DD
DD
= 5 V, THD+N = 1% 2 W
DD
4.5 V to 5.5 V
1 A, maximum
SLOU234 – April 2009 TPA2017D2 Audio Power Amplifier EVM 1
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Operation
2 Operation
2.1 Quick-Start List for Stand-Alone Operation
2.1.1 Speaker Amplifier
Follow these steps to use the TPA2017D2EVM stand-alone or when connecting it into existing circuits or
equipment. Connections to the EVM can be made by inserting stripped wire or using banana plugs for the
power supply and output connections. The inputs accept standard RCA plugs.
2.1.2 Power Supply
1. Ensure that all external power sources are set to OFF.
2. Connect an external regulated power supply adjusted to 5 V to the module VDD and GND banana
jacks, taking care to observe marked polarity.
2.1.3 Evaluation Module Preparations
Inputs and Outputs
1. If connecting to a fully differential input or a grounded input (the shield of the RCA is GND), remove
jumpers JP1 and JP2 from the EVM. If connecting to a floating source like a portable CD, install
jumpers JP1 and JP2. After setting the JP1 and JP2 jumpers appropriately, connect the input source to
the speaker left and right inputs (INL and INR) .
2. Connect a speaker across OUTR+ and OUTR-. Connect another speaker across OUTL+ and OUTL-.
Control Inputs
1. Enable: Hold down switch EN to place the amplifier in shutdown. Release EN to reactivate the
amplifier.
2. AGC1/AGC2: Together, these terminals determine the AGC setting of the amplifier. See Table 1 .
Installing the jumpers in position 0 sets the respective terminal to GND. Installing the jumpers in
position 1 sets the respective terminals to VDD.
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2.1.4 Power Up
1. Verify correct voltage and input polarity, and turn on the external power supplies.
The EVM should begin operation.
2. Adjust the input signal.
3. Adjust the control inputs to the desired settings.
4. Adjust the amplifier AGC setting by installing/removing the jumpers, AGC1 and AGC2.
Table 1. Gain Settings
AGC1 AGC2 Function
0 0 AGC Function disabled
0 1 AGC Limiter Function enabled
1 0
1 1
AGC, Limiter, and Compression Functions
AGC, Limiter, Compression, and Noise Gate
Functions enabled
enabled
List of Tables2 SLOU234 – April 2009
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Red
VDD
Black
GND
Vdd
Vdd
Vdd
Vdd
Vdd
Vdd
Vdd
Vdd
QFN
20-RTJ
5
6
11
20
U1
TPA2017D2RTJ
7
8
9
10
15 14 13
12
19
1
8
17
16
4
321
Po
werPad
1 2
EN
1
2
3
RCA (B
lack)
IN
L
1
2
3
INR
RCA (Red)
12
JP1
JP2
2 1
0603
10
0
R1
R2
100
0603
0603
100
R3
R4
100
0603
0603
.047ufd/25V
C
2
C3
.047ufd
/25V
06
03
0603
.
047ufd/25V
C4
C5
.047ufd/25V
0603
0603
1.0ufd/
10V
C6
C7
1.0ufd/10V
0603
0603
1.0ufd/10V
C8
C9
1.0ufd/10V
0603
C1
3
1
.0ufd/10V
0603
0603
1.0ufd/10V
C15
0603100K
R5
0603
0.1ufd/25V
C10
C1
1
0
.1ufd/25V
0603
0603
0.
1ufd/25V
C1
2
C14
0.1ufd/25V
0603
1
2
3
AGC1
1
2
3
AGC2
1206
10u
fd/16V
C1
0.87
5"
0.875"
0.875"
0.875"
1
2
J3
J1
2
1
1
2
J2
0805
100oh
ms/4A
1
2
L1
L2
2
1
100ohms/4A
0
805
0805
100ohms/4A
1
2
L
3
L4
2
1
100ohms/4A
0805
0603
1000pfd/50V
C16
C17
1000p
fd/50V
0603
0603
1000pf
d/50V
C18
C19
1000pfd/50V
0603
0603
1.00K
R6
R7
1.00K
0603
0603
1.00K
R8
R9
1.00K
060
3
0603
4700pf
d/50V
C20
C21
4700
pfd/50V
060
3
0603
4700pfd/50V
C22
C23
4700pfd/50V
0603
W
hite
TP1
TP2
Whi
te
Wh
ite
TP3
TP4
W
hite
OUT
R+
OUTR-
OU
TL-
OUTL+
Blac
k
Black
GND
ON
LY
TESTING
EMI
FOR
J1/J2/J3
B
OM ONLY
GND
IN
PUT
FILTER
S
TANDOFFS
SHUNTS
JP1
JP2
A
GC1 AGC2
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3 Schematic and Bill of Materials
3.1 TPA2017D2EVM Schematic
Schematic and Bill of Materials
SLOU234 – April 2009 List of Tables 3
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Figure 1. EVM Schematic
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