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1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
IN1
SGND
SVRR
OUT1
PGND
OUT2
V
CC
M/SB
IN2
GND/HS
GND/HS
GND/HS
GND/HS
GND/HS
GND/HS
GND/HS
GND/HS
GND/HS
GND/HS
GND/HS
NE PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
GND/HS
IN1
NC
SGND
SVRR
NC
OUT1
OUT1
PGND
GND/HS
GND/HS
IN2
NC
M/SB
V
CC
NC
OUT2
OUT2
PGND
GND/HS
DWP PACKAGE
(TOP VIEW)
Cross Section View Showing PowerP AD
NC – No internal connection
6-W STEREO AUDIO POWER AMPLIFIER
TPA1517
SLOS162D – MARCH 1997 – REVISED FEBRUARY 2007
FEATURES
• Thermal Protection
• TDA1517P Compatible • Fixed Gain: 20 dB
• High Power Outputs (6 W/Channel) • Mute and Standby Operation
• Surface Mount Availability 20-Pin Thermal • Supply Range: 9.5 V - 18 V
SOIC PowerPAD™
DESCRIPTION
The TPA1517 is a stereo audio power amplifier that contains two identical amplifiers capable of delivering 6 W
per channel of continuous average power into a 4- Ω load at 10% THD+N or 5 W per channel at 1% THD+N.
The gain of each channel is fixed at 20 dB. The amplifier features a mute/standby function for power-sensitive
applications. The amplifier is available in the PowerPAD™ 20-pin surface-mount thermally-enhanced package
(DWP) that reduces board space and facilitates automated assembly while maintaining exceptional thermal
characteristics. It is also available in the 20-pin thermally enhanced DIP package (NE).
AVAILABLE OPTIONS
PowerPAD is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
-40 ° C to 85 ° C TPA1517NE TPA1517DWP
(1) For the most current package and ordering information, see the Package Option Addendum at the end
of this document, or see the TI Web site at www.ti.com .
(2) The DWP package is available taped and reeled. To order a taped and reeled part, add the suffix R
(e.g., TPA1517DWPR).
T
A
THERMALLY ENHANCED THERMALLY ENHANCED
PLASTIC DIP SURFACE MOUNT (DWP)
PACKAGED DEVICES
(1)
Copyright © 1997–2007, Texas Instruments Incorporated
(2)
(2)
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TPA1517
SLOS162D – MARCH 1997 – REVISED FEBRUARY 2007
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Terminal Functions
TERMINAL
NAME
DWP NE
NO. NO.
IN1 2 1 I IN1 is the audio input for channel 1.
SGND 4 2 I SGND is the input signal ground reference.
SVRR 5 3 SVRR is the midrail bypass.
OUT1 7, 8 4 O OUT1 is the audio output for channel 1.
PGND 9, 12 5 PGND is the power ground reference.
OUT2 13, 14 6 O OUT2 is the audio output for channel 2.
V
CC
16 7 I V
M/SB 17 8 I TPA1517 for standby operation. When held between 3.5 V and 8.2 V, this signal enables the
IN2 19 9 I IN2 in the audio input for channel 2.
GND/HS 10-20
1, 10, GND/HS are the ground and heatsink connections. All GND/HS terminals are connected directly to
11, 20 the mount pad for thermal-enhanced operation.
I/O DESCRIPTION
is the supply voltage input.
CC
M/SB is the mute/standby mode enable. When held at less than 2 V, this signal enables the
TPA1517 for mute operation. When held above 9.3 V, the TPA1517 operates normally.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted)
UNIT
V
V
T
T
T
Supply voltage 22 V
CC
Input voltage (IN1, IN2) 22 V
I
Continuous total power dissipation
Operating free-air temperature range -40 ° C to 85 ° C
A
Operating junction temperature range -40 ° C to 150 ° C
J
Storage temperature range -65 ° C to 85 ° C
stg
(See Dissipation Rating Table)
Internally limited
DISSIPATION RATING TABLE
PACKAGE TA≤ 25 ° C DERATING FACTOR TA= 70 ° C TA= 85 ° C
(1)
DWP
(1)
NE
2.94 W 23.5 mW/ ° C 1.88 W 1.53 W
2.85 W 22.8 mW/ ° C 1.82 W 1.48 W
(1) See the Texas Instruments document, PowerPAD Thermally Enhanced Package Application Report (literature number SLMA002), for
more information on the PowerPAD package. The thermal data was measured on a PCB layout based on the information in the section
entitled Texas Instruments Recommended Board for PowerPAD on page 33 of the before mentioned document.
RECOMMENDED OPERATING CONDITIONS
MIN NOM MAX UNIT
V
T
Supply voltage 9.5 18 V
CC
Operating free-air temperature -40 85 ° C
A
2
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SLOS162D – MARCH 1997 – REVISED FEBRUARY 2007
ELECTRICAL CHARACTERISTICS
V
= 12 V, TA= 25 ° C (unless otherwise noted)
CC
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
I
CC
V
O(DC)
V
(M/SB)
V
O(M)
I
CC(SB)
(1) At 9.5 V < V
Supply current 45 80 mA
DC output voltage See Note
(1)
6 V
Voltage on M/SB terminal for normal operation 9.6 V
Mute output voltage VI= 1 V (max) 2 mV
Supply current in standby mode 7 100 µ A
< 18 V the DC output voltage is approximately VCC/2.
CC
OPERATING CHARACTERISTIC
V
= 12 V, RL= 4 Ω , f = 1 kHz, TA= 25 ° C
CC
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
P
Output power
O
(1)
SNR Signal-to-noise ratio 84 dB
THD Total harmonic distortion PO= 1 W, RL= 8 Ω , f = 1 kHz 0.1%
I
I
Non-repetitive peak output current 4 A
O(SM)
Repetitive peak output current 2.5 A
O(RM)
Low-frequency roll-off 3 dB 45 Hz
High-frequency roll-off 1 dB 20 kHz
Supply ripple rejection ratio M/SB = On, f = 1 kHz -65 dB
Z
V
Input impedance 60 k Ω
I
Noise output voltage
n
(2)
Channel separation Rs= 10 k Ω -58 dB
Gain 18.5 20 21
Channel balance 0.1 1 dB
(1) Output power is measured at the output terminals of the IC.
(2) Noise voltage is measured in a bandwidth of 20 Hz to 20 kHz.
THD = 0.2% 3
THD = 10% 6
Rs= 0, M/SB = On 50 µ V(rms)
Rs= 10 k Ω , M/SB = On 70 µ V(rms)
M/SB = Mute 50 µ V(rms)
TPA1517
W
ELECTRICAL CHARACTERISTICS
V
= 14.5 V, TA= 25 ° C (unless otherwise noted)
CC
I
CC
V
O(DC)
V
(M/SB)
V
O(M)
I
CC(SB)
(1) At 9.5 V < V
Supply current 50 90 mA
DC output voltage See Note
Voltage on M/SB terminal for normal operation 9.6 V
Mute output voltage VI= 1 V (max) 2 mV
Supply current in standby mode 7 100 µ A
< 18 V the DC output voltage is approximately VCC/2.
CC
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
(1)
7.25 V
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TPA1517
SLOS162D – MARCH 1997 – REVISED FEBRUARY 2007
OPERATING CHARACTERISTIC
V
= 14.5 V, RL= 4 Ω , f = 1 kHz, TA= 25 ° C
CC
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
P
Output power
O
(1)
SNR Signal-to-noise ratio 84 dB
THD Total harmonic distortion PO= 1 W 0.1%
I
O(SM)
I
O(RM)
Non-repetitive peak output current 4 A
Repetitive peak output current 2.5 A
Low-frequency roll-off 3 dB 45 Hz
High-frequency roll-off 1 dB 20 kHz
Supply ripple rejection ratio M/SB = On -65 dB
Z
V
Input impedance 60 k Ω
I
Noise output voltage
n
(2)
Channel separation Rs= 10 k Ω -58 dB
Gain 18.5 20 21 dB
Channel balance 0.1 1 dB
THD = 0.2% 4.5 W
THD < 10% 6 W
Rs= 0, M/SB = On 50 µ V(rms)
Rs= 10 k Ω , M/SB = On 70 µ V(rms)
M/SB = Mute 50 µ V(rms)
(1) Output power is measured at the output terminals of the IC.
(2) Noise voltage is measured in a bandwidth of 22 Hz to 22 kHz.
TYPICAL CHARACTERISTICS
Table of Graphs
I
CC
THD + N Total harmonic distortion plus noise
V
n
P
O
P
D
Supply current vs Supply voltage 1
Power supply rejection ratio vs Frequency 2, 3
V
= 12 V
CC
V
= 14.5 V
CC
Crosstalk vs Frequency 14, 15
Gain vs Frequency 16
Phase vs Frequency 16
Noise voltage vs Frequency 17, 18
Output power vs Supply voltages Load resistance 1920
Power dissipation vs Output power 21, 22
FIGURE
vs Frequency 4, 5, 6
vs Power output 10, 11
vs Frequency 7, 8, 9
vs Power output 12, 13
4
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50
0
8 10 12
- Supply Current - mA
100
14 16 18 20
I
CC
VCC - Supply Voltage - V
25
75
- 50
- 60
- 80
- 90
- 100
0
- 70
100 1 k 10 k
Supply Ripple Rejection Ratio - dB
- 30
- 40
- 20
f - Frequency - Hz
- 10
VCC = 12 V
RL = 4 Ω
CB = 100 µF
- 50
- 60
- 80
- 100
100 1 k
- 30
- 10
0
10 K
- 20
- 40
- 70
- 90
VCC = 14.5 V
RL = 4 Ω
f - Frequency - Hz
Supply Ripple Rejection Ratio - dB
0.1%
0.01%
20 100
THD+N - Total Harmonic Distortion + Noise
1%
f - Frequency - Hz
10%
1 k 10 k 20 k
VCC = 12 V
RL = 4 Ω
PO = 3 W
Both Channels
TPA1517
SLOS162D – MARCH 1997 – REVISED FEBRUARY 2007
SUPPLY CURRENT SUPPLY RIPPLE REJECTION RATIO
vs vs
SUPPLY VOLTAGE FREQUENCY
Figure 1. Figure 2.
SUPPLY RIPPLE REJECTION RATIO TOTAL HARMONIC DISTORTION + NOISE
vs vs
FREQUENCY FREQUENCY
Figure 3. Figure 4.
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0.1%
0.01%
20 100 1 k
THD+N - Total Harmonic Distortion + Noise
1%
f - Frequency - Hz
10%
10 k 20 k
VCC = 12 V
RL = 8 Ω
PO = 1 W
Both Channels
20
0.1%
0.01%
100 1 k
THD+N - Total Harmonic Distortion + Noise
1%
f - Frequency - Hz
10%
10 k 20 k
VCC = 12 V
RL = 32 Ω
PO = 0.25 W
20
0.1%
0.01%
100 1 k
THD+N - Total Harmonic Distortion + Noise
1%
f - Frequency - Hz
10%
10 k 20 k
VCC = 14.5 V
RL = 4 Ω
PO = 3 W
20
0.1%
0.01%
100 1 k
THD+N - Total Harmonic Distortion + Noise
1%
f - Frequency - Hz
10%
10 k 20 k
VCC = 14.5 V
RL = 8 Ω
PO = 1.5 W
TPA1517
SLOS162D – MARCH 1997 – REVISED FEBRUARY 2007
TOTAL HARMONIC DISTORTION + NOISE TOTAL HARMONIC DISTORTION + NOISE
TOTAL HARMONIC DISTORTION + NOISE TOTAL HARMONIC DISTORTION + NOISE
vs vs
FREQUENCY FREQUENCY
Figure 5. Figure 6.
vs vs
FREQUENCY FREQUENCY
6
Figure 7. Figure 8.
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PO - Power Output - W
0.01 0.1 1 10
0.1%
0.01%
THD+N - Total Harmonic Distortion + Noise
1%
10%
VCC = 12 V
RL = 4 Ω
Both Channels
f = 20 Hz
f = 20 kHz
f = 1 kHz
20
0.1%
0.01%
100 1 k
THD+N - Total Harmonic Distortion + Noise
1%
f - Frequency - Hz
10%
10 k 20 k
VCC = 14.5 V
RL = 32 Ω
PO = 0.25 W
PO - Power Output - W
0.01 0.1 1 10
0.1%
0.01%
THD+N - Total Harmonic Distortion + Noise
1%
10%
VCC = 12 V
RL = 8 Ω
Both Channels
f = 20 Hz
f = 20 kHz
f = 1 kHz
PO - Power Output - W
0.01 0.1 1 10
0.1%
0.01%
THD+N - Total Harmonic Distortion + Noise
1%
10%
VCC = 14.5 V
RL = 4 Ω
Both Channels
f = 20 Hz
f = 20 kHz
f = 1 kHz
TPA1517
SLOS162D – MARCH 1997 – REVISED FEBRUARY 2007
TOTAL HARMONIC DISTORTION + NOISE TOTAL HARMONIC DISTORTION + NOISE
vs vs
FREQUENCY POWER OUTPUT
Figure 9. Figure 10.
TOTAL HARMONIC DISTORTION + NOISE TOTAL HARMONIC DISTORTION + NOISE
vs vs
POWER OUTPUT POWER OUTPUT
Figure 11. Figure 12.
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PO - Power Output - W
0.01 0.1 1 10
0.1%
0.01%
THD+N - Total Harmonic Distortion + Noise
1%
10%
VCC = 14.5 V
RL = 8 Ω
Both Channels
f = 20 kHz
f = 20 Hz
f = 1 kHz
- 60
- 65
- 70
- 80
20 100 1 k
Crosstalk - dB
- 50
- 45
f - Frequency - Hz
- 40
10 k 20 k
- 55
- 75
VCC = 12 V
RL = 4 Ω
PO = 3 W
Both Channels
- 60
- 65
- 70
- 80
20 100 1 k
Crosstalk - dB
- 50
- 45
f - Frequency - Hz
- 40
10 k 20 k
- 55
- 75
VCC = 14.5 V
RL = 4 Ω
PO = 5 W
Both Channels
TPA1517
SLOS162D – MARCH 1997 – REVISED FEBRUARY 2007
TOTAL HARMONIC DISTORTION + NOISE CROSSTALK
vs vs
POWER OUTPUT FREQUENCY
Figure 13. Figure 14.
CROSSTALK
vs
FREQUENCY
8
Figure 15.
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- 10
- 20
- 30
- 40
10 100 1 k 10 k
Gain - dB
0
10
f - Frequency - Hz
20
100 k 1 M
200°
100°
0°
-100°
-200°
VCC = 12 V
RL = 4 Ω
Phase
Phase
Gain
20 100 1 k
f - Frequency - Hz
10 k 20 k
VCC = 12 V
BW = 22 Hz to 22 kHz
RL = 4 Ω
Both Channels
1
0.1
0.01
- Noise Voltage - mV
V
n
20 100 1 k
f - Frequency - Hz
10 k 20 k
VCC = 14.5 V
BW = 22 Hz to 22 kHz
RL = 4 Ω
Both Channels
1
0.1
0.01
- Noise Voltage - mV
V
n
GAIN AND PHASE
TPA1517
SLOS162D – MARCH 1997 – REVISED FEBRUARY 2007
vs
FREQUENCY
Figure 16.
NOISE VOLTAGE NOISE VOLTAGE
vs vs
FREQUENCY FREQUENCY
Figure 17. Figure 18.
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VCC - Supply Voltage - V
4
2
0
8 9 10 11 12 13 14
6
8
15 16 17 18
RL = 4 Ω
RL = 8 Ω
- Output Power - WP
O
THD < 1%
VCC = 14.5 V
VCC = 12 V
THD < 1%
3
2
1
0
2 4 6 8 14 16 20
4
5
6
22 24 28 3210 12 18 26 30
RL - Load Resistance - Ω
- Output Power - WP
O
2
1.5
1
0.5
0 1 2 3
2.5
3
3.5
4 5 6
VCC = 12 V
RL = 4 Ω
RL = 8 Ω
PO - Output Power - W
- Power Dissipation - WP
D
2
1.5
1
0.5
0 1 2 3
2.5
3
3.5
4 5 6
VCC = 14.5 V
RL = 4 Ω
PO - Output Power - W
RL = 8 Ω
- Power Dissipation - WP
D
TPA1517
SLOS162D – MARCH 1997 – REVISED FEBRUARY 2007
OUTPUT POWER OUTPUT POWER
SUPPLY VOLTAGE LOAD RESISTANCE
vs vs
Figure 19. Figure 20.
POWER DISSIPATION POWER DISSIPATION
vs vs
OUTPUT POWER OUTPUT POWER
10
Figure 21. Figure 22.
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Mute
Standby
C
B
V
CC
IN2
SGND
PGND
IN11
C
IR
Right
Ref
Left
Mute/Standby Select
(see Note B)
C
OR
C
OL
SVRR
OUT1
M/SB
OUT2
2
5
3
9
10 kΩ
6.8 kΩ
V
CC
2 kΩ
2 kΩ
18 kΩ
18 kΩ
GND/HS
4
8
6
10 – 20
Copper Plane
Mute/Standby Switch
(see Note A)
C
S
V
CC
V
CC
7
+
+
–
OUT2
+
+
–
+
–
60 k
2.1 V
ref
+
–
2.1 V
ref
× 1
× 1
60 k
× 1
15 kΩ
15 kΩ
C
IL
S1
S2
1 µF
470 µF
470 µF
1 µF
1 µF
2.2 µF
GdB+ 20 LOGǒG
VńV
Ǔ
SLOS162D – MARCH 1997 – REVISED FEBRUARY 2007
APPLICATION INFORMATION
AMPLIFIER OPERATION
The TPA1517 is a stereo audio power amplifier designed to drive 4- Ω speakers at up to 6 W per channel.
Figure 23 is a schematic diagram of the minimum recommended configuration of the amplifier. Gain is internally
fixed at 20 dB (gain of 10 V/V).
TPA1517
A. When S1 is open, the TPA1517 operates normally. When this switch is closed, the device is in mute/standby mode.
B. When S2 is open, activating S1 places the TPA1517 in mute mode. When S2 is closed, activating S1 places the
C. The terminal numbers are for the 20-pin NE package.
The following equation is used to relate gain in V/V to dB:
TPA1517 in standby mode.
Figure 23. TPA1517 Minimum Configuration
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V
MID
+
V
CC
2
NORMAL
MUTE
STANDBY
Undetermined State
Undetermined State
22
9.3
8.2
3.5
2
0
- Input Voltage on M/SB - V
V
I(M/SB)
TPA1517
SLOS162D – MARCH 1997 – REVISED FEBRUARY 2007
APPLICATION INFORMATION (continued)
The audio outputs are biased to a midrail voltage which is shown by the following equation:
The audio inputs are always biased to 2.1 V when in mute or normal mode. Any dc offset between the input
signal source and the input terminal is amplified and can seriously degrade the performance of the amplifier. For
this reason, it is recommended that the inputs always be connected through a series capacitor (ac coupled). The
power outputs, also having a dc bias, must be connected to the speakers via series capacitors.
MUTE/STANDBY OPERATION
The TPA1517 has three modes of operation; normal, mute, and standby. They are controlled by the voltage on
the M/SB terminal as described in Figure 24 . In normal mode, the TPA1517 amplifies the signal applied to the
two input terminals providing low impedance drive to speakers connected to the output terminals. In mute mode,
the amplifier retains all bias voltages and quiescent supply current levels but does not pass the input signal to
the output. In standby mode, the internal bias generators and power-drive stages are turned off, thereby
reducing the supply current levels.
Figure 24. Standby, Mute, and Normal (On) Operating Conditions
The designer must take care to place the control voltages within the defined ranges for each desired mode,
whenever an external circuit is used to control the input voltage at the M/SB terminal. The undefined area can
cause unpredictable performance and should be avoided. As the control voltage moves through the undefined
areas, pop or click sounds may be heard in the speaker. Moving from mute to normal causes a very small click
sound. Whereas moving from standby to mute can cause a much larger pop sound. Figure 25 shows external
circuitry designed to help reduce transition pops when moving from standby mode to normal mode.
12
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Mute
Standby
C
B
V
CC
IN2
SGND
PGND
IN11
C
IR
Right
Ref
Left
C
OR
C
OL
SVRR
OUT1
M/SB
OUT2
2
5
3
9
2 kΩ
2 kΩ
18 kΩ
18 kΩ
GND/HS
4
8
6
10 – 20
Copper Plane
C
S
V
CC
V
CC
7
+
+
–
OUT2
+
+
–
+
–
60 k
2.1 V
ref
+
–
2.1 V
ref
× 1
× 1
60 k
× 1
15 kΩ
15 kΩ
C
IL
S2
See
Note B
1N914
10 kΩ
6.8 kΩ
10 kΩ
47 kΩ
10 kΩ
47 kΩ
47 kΩ
V
CC
TTL Control
Low – Mute
High – On
S1
See
Note A
220 Ω
Q1
Q2
1 µF
470 µF
1N914
470 µF
1 µF
1 µF
2.2 µF
TPA1517
SLOS162D – MARCH 1997 – REVISED FEBRUARY 2007
APPLICATION INFORMATION (continued)
Figure 25 is a reference schematic that provides TTL-level control of the M/SB terminal. A diode network is also
included which helps reduce turn-on pop noises. The diodes serve to drain the charge out of the output coupling
capacitors while the amplifier is in shutdown mode. When the M/SB voltage is in the normal operating range, the
diodes have no effect on the ac performance of the system.
A. When S1 is closed, the depop circuitry is active during standby mode.
B. When S2 is open, activating S1 places the TPA1517 in mute mode. When S2 is closed, activating S1 places the
TPA1517 in standby mode.
C. The terminal numbers are for the 20-pin NE package.
Figure 25. TTL Control with POP Reduction
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% Power in C
O
+
ESR
R
L
T
C
+
1
2pRC
7500 CBu 5RLCOu 300000 C
I
1
2p60000 C
I
t 10 Hz
TPA1517
SLOS162D – MARCH 1997 – REVISED FEBRUARY 2007
APPLICATION INFORMATION (continued)
COMPONENT SELECTION
Some of the general concerns for selection of capacitors are:
• Leakage currents on aluminum electrolytic capacitors
• ESR (equivalent series resistance)
• Temperature ratings
LEAKAGE CURRENTS
Leakage currents on most ceramic, polystyrene, and paper capacitors are negligible for this application.
Leakage currents for aluminum electrolytic and tantalum tend to be higher. This is especially important on the
input terminals and the SVRR capacitor. These nodes encounter from 3 V to 7 V, and need to have leakage
currents less than 1 µ A to keep from affecting the output power and noise performance.
EQUIVALENT SERIES RESISTANCE
ESR is mainly important on the output coupling capacitor, where even 1 Ω of ESR in C
reduce the output drive power by 12.5%. ESR should be considered across the frequency range of interest,
(i.e., 20 Hz to 20 kHz). The following equation calculates the amount of power lost in the coupling capacitor:
with an 8- Ω speaker can
O
The power supply decoupling requires a low ESR as well to take advantage of the full output drive current.
TEMPERATURE RANGE
The temperature range of the capacitors are important. Many of the high-density capacitors perform differently at
different temperatures. When consistent high performance is required from the system overtemperature in terms
of low THD, maximum output power, and turn-on/off popping, then interactions of the coupling capacitors and
the SVRR capacitors need to be considered, as well as the change in ESR on the output capacitor with
temperature.
TURN-ON POP CONSIDERATION
To select the proper input coupling capacitor, the designer should select a capacitor large enough to allow the
lowest desired frequency pass and small enough that the time constant is shorter than the output RC time
constant to minimize turn-on popping. The input time constant for the TPA1517 is determined by the input 60-k Ω
resistance of the amplifier, and the input coupling capacitor according to the following generic equation:
For example, 8- Ω speakers and 220- µ F output coupling capacitors would yield a 90-Hz cut-off point for the
output RC network. The input network should be the same speed or faster ( > 90 Hz TC). A good choice would
be 180 Hz. As the input resistance is 60 k Ω , a 14-nF input coupling capacitor would do.
The bypass-capacitor time constant should be much larger ( × 5) than either the input coupling capacitor time
constant or the output coupling capacitor time constants. In the previous example with the 220- µ F output
coupling capacitor, the designer should want the bypass capacitor, TC, to be in the order of 18 Hz or lower. To
get an 18-Hz time constant, C
7.5 k Ω .
In summary, follow one of the three simple relations presented below, depending on the tradeoffs between low
frequency response and turn-on pop.
1. If depop performance is the top priority, then follow:
is required to be 1 µ F or larger because the resistance this capacitor sees is
B
2. If low frequency ac response is more important but depop is still a consideration then follow:
14
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1
2p60000 C
I
≤
1
2pRLC
I
≤ f
low
PdB+ 10Log
ǒ
P
W
P
ref
Ǔ
+ 10Log
ǒ
3.5
1
Ǔ
+ 5.44 dB
5.44 dB * 15 dB + * 9.56 dB(15 dB headroom
)
5.44 dB * 12 dB + * 6.56 dB(12 dB headroom
)
PW+ 10
PdBń10
P
ref
+ 111 mW (15 dB headroom)
+ 221 mW (12 dB headroom)
TPA1517
SLOS162D – MARCH 1997 – REVISED FEBRUARY 2007
APPLICATION INFORMATION (continued)
3. If low frequency response is most important and depop is not a consideration then follow:
THERMAL APPLICATIONS
Linear power amplifiers dissipate a significant amount of heat in the package under normal operating conditions.
A typical music CD requires 12 dB to 15 dB of dynamic headroom to pass the loudest portions without distortion
as compared with the average power output. Figure 19 shows that when the TPA1517 is operating from a 12-V
supply into a 4- Ω speaker that approximately 3.5 W peaks are possible. Converting watts to dB using the
following equation:
Subtracting dB for the headroom restriction to obtain the average listening level without distortion yields the
following:
Converting dB back into watts:
This is valuable information to consider when attempting to estimate the heat dissipation requirements for the
amplifier system. Comparing the absolute worst cast, which is 3.5 W of continuous power output with 0 dB of
headroom, against 12-dB and 15-dB applications drastically affects maximum ambient temperature ratings for
the system. Using the power dissipation curves for a 12-V, 4- Ω system, internal dissipation in the TPA1517 and
maximum ambient temperatures are shown in Table 1 .
Table 1. TPA1517 Power Rating
PEAK OUTPUT POWER POWER DISSIPATION MAXIMUM AMBIENT
(W) (W/Channel) TEMPERATURE
3.5 3.5 W 2.1 -34 ° C
3.5 1.77 W (3 dB) 2.4 -61 ° C
3.5 884 mW (6 dB) 2.25 -48 ° C
3.5 442 mW (9 dB) 1.75 -4 ° C
3.5 221 mW (12 dB) 1.5 18 ° C
3.5 111 mW (15 dB) 1.25 40 ° C
AVERAGE OUTPUT POWER
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15
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θ
JA
+
1
Derating
+
1
0.0228
+ 43.9°CńW
For 0 CFM :
TAMax + TJMax * qJAP
D
+ 150 * 43.9(1.25 2)+ 40°C(15 dB headroom, 0 CFM
)
60
30
10
0
0 1 2 3 4 5 6
θ – C/W
o
JA
– ThetaJA
70
80
90
7 8 9 10
50
40
20
Copper Area
TPA1517
SLOS162D – MARCH 1997 – REVISED FEBRUARY 2007
The maximum ambient temperature depends on the heatsinking ability of the PCB system. The derating factor
for the NE package with 7 square inches (17.78 cm) of copper area is 22.8 mW/ ° C. Converting this to θJA:
To calculate maximum ambient temperatures, first consider that the numbers from the dissipation graphs are per
channel so the dissipated heat needs to be doubled for two channel operation. Given θJA, the maximum
allowable junction temperature and the total internal dissipation, the maximum ambient temperature can be
calculated with the following equation. The maximum recommended junction temperature for the TPA1517 is
150 ° C.
Table 1 clearly shows that for most applications some airflow is required to keep junction temperatures in the
specified range. The TPA1517 is designed with thermal protection that turns the device off when the junction
temperature surpasses 150 ° C to prevent damage to the IC. Using the DWP package on a multilayer PCB with
internal ground planes can achieve better thermal performance. Table 1 was calculated for a maximum volume
system; when the output level is reduced, the numbers in the table change significantly. Also using 8- Ω
speakers dramatically increases the thermal performance by increasing amplifier efficiency.
NE THERMAL RESISTANCE, θ
JA
vs
COPPER AREA
Figure 26.
16
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PACKAGE OPTION ADDENDUM
www.ti.com
7-Dec-2006
PACKAGING INFORMATION
Orderable Device Status
TPA1517DWP ACTIVE SO
(1)
Package
Type
Power
Package
Drawing
Pins Package
Qty
Eco Plan
DWP 20 25 Green (RoHS &
no Sb/Br)
PAD
TPA1517DWPG4 ACTIVE SO
Power
DWP 20 25 Green (RoHS &
no Sb/Br)
PAD
TPA1517DWPR ACTIVE SO
Power
DWP 20 2000 Green (RoHS &
no Sb/Br)
PAD
TPA1517DWPRG4 ACTIVE SO
Power
DWP 20 2000 Green (RoHS &
no Sb/Br)
PAD
TPA1517NE ACTIVE PDIP NE 20 20 Pb-Free
TPA1517NEE4 ACTIVE PDIP NE 20 20 Pb-Free
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(RoHS)
(RoHS)
(2)
Lead/Ball Finish MSL Peak Temp
CU NIPDAU Level-2-260C-1 YEAR
CU NIPDAU Level-2-260C-1 YEAR
CU NIPDAU Level-2-260C-1 YEAR
CU NIPDAU Level-2-260C-1 YEAR
CU NIPDAU N / A for Pkg Type
CU NIPDAU N / A for Pkg Type
(3)
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and
package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS
compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
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In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
Addendum-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
TAPE AND REEL INFORMATION
19-Mar-2008
*All dimensions are nominal
Device Package
TPA1517DWPR SO
Type
Power
PAD
Package
Drawing
DWP 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.0 Q1
Pins SPQ Reel
Diameter
(mm)
Reel
Width
W1 (mm)
A0 (mm) B0 (mm) K0 (mm) P1
(mm)W(mm)
Quadrant
Pin1
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
19-Mar-2008
*All dimensions are nominal
Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)
TPA1517DWPR SO PowerPAD DWP 20 2000 346.0 346.0 41.0
Pack Materials-Page 2
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