TDA2040_12 [STMICROELECTRONICS]
25-watt hi-fi audio power amplifier; 25瓦的高保真音频功率放大器
| 型号： | TDA2040_12 |
| 厂家： | 
ST |
| 描述： | 25-watt hi-fi audio power amplifier |
| 文件： | 总16页 (文件大小：1345K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TDA2040
25-watt hi-fi audio power amplifier
Datasheet − production data
Features
■ Wide-range supply voltage, up to 40 V
■ Single or split power supply
■ Short-circuit protection to ground
■ Thermal shutdown
■ P = 25 W @ THD = 0.5%, V = 1ꢀ V, R = 4 Ω
O
S
L
Pentawatt V
■ P = 30 W @ THD =10%, V = 1ꢀ V, R = 4 Ω
O
S
L
comprising an arrangement for automatically
limiting the dissipated power so as to keep the
operating point of the output transistors within
their safe operating range. A thermal shutdown
system is also included.
Description
The TDA2040 is a monolithic integrated circuit in
®
the Pentawatt package, intended for use as an
audio class-AB amplifier. Typically, it provides
Table 1.
Order code
TDA2040V
Device summary
25 W output power into 4 Ω with THD = 0.5% at
V = 34 V. The TDA2040 provides high output
S
Package
Pentawatt V (vertical)
current and has very low harmonic and crossover
distortion. Furthermore, the device incorporates a
patented short-circuit protection system
Figure 1.
TDA2040 test circuit
July 2012
Doc ID 1460 Rev 6
1/16
This is information on a product in full production.
www.st.com
16
Pin connections
TDA2040
1
Pin connections
Figure 2.
Schematic diagram
Figure 3.
Pin connections
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Doc ID 1460 Rev 6
TDA2040
Electrical specifications
2
Electrical specifications
2.1
Absolute maximum ratings
Table 2.
Symbol
Absolute maximum ratings
Parameter
Value
Unit
Vs
Supply voltage
20
Vs
15
V
Vi
Input voltage
Vi
Differential input voltage
V
A
Io
Output peak current (internally limited)
Power dissipation at Tcase = ꢀ5 °C
Storage and junction temperature
ESD maximum withstanding voltage range,
4
Ptot
Tstg, Tj
25
W
-40 to 150
°C
VESD_HBM test condition CDF-AEC-Q100-002- ”Human body
model”
1500
V
2.2
Thermal data
Table 3.
Symbol
Thermal data
Parameter
Min
Typ
Max
Unit
°C/W
Rth_j-case Thermal resistance junction to case
-
-
3
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Electrical specifications
TDA2040
2.3
Electrical characteristics
The specifications given here were obtained with the conditions VS = 16 V, Tamb = 25 °C
unless otherwise specified.
Table 4.
Symbol
Electrical characteristics
Parameter
Test conditions
Min Typ Max Unit
VS
Id
Supply voltage
-
4.5
-
20
30
V
VS = 4.5 V
VS = 20 V
-
mA
mA
Quiescent drain current
-
45
100
Ib
Input bias current
Input offset voltage
Input offset current
VS = 20 V
VS = 20 V
-
-
-
-
0.3
2
1
μA
mV
nA
VOS
IOS
20
200
d = 0.5%, f = 1 kHz, Tamb = 60 °C
RL = 4 Ω
RL = 4 Ω, VS = 1ꢀ
RL = 8 Ω
20
-
22
25
12
-
-
Po
Output power
d = 0.5%, f = 15 kHz; Tamb = 60 °C
RL = 4 Ω
RL = 4 Ω, VS = 1ꢀ
W
15
18
20
-
d = 10%, f = 1 kHz
30
RL = 4 Ω, VS = 1ꢀ
BW
GvOL
Gv
Power bandwidth
Po = 1 W, RL = 4 Ω
f = 1 kHz
-
-
100
80
-
Hz
dB
dB
Voltage gain (open loop)
Voltage gain (closed loop)
-
f = 1 kHz
29.5 30
30.5
Po = 0.1 to 10 W, RL = 4 Ω,
-
-
0.08
-
-
%
%
f = 40 to 15000 Hz
d
Total harmonic distortion
Input noise voltage
Po = 0.1 to 10 W, RL = 4 Ω, f = 1 kHz
0.03
B = Curve A
-
-
2
3
-
eN
μV
B = 22 Hz to 22 kHz
10
B = Curve A
-
-
50
80
-
IN
Ri
Input noise current
pA
MΩ
dB
B = 22 Hz to 22 kHz
200
Input resistance (pin 1)
-
0.5
40
5
-
-
GV = 30 dB, RL = 4 Ω, Rg = 22 kΩ, f = 100 Hz
Vripple = 0.5 V RMS
SVRR Supply voltage rejection ratio
50
f = 1 kHz
h
Efficiency
-
-
66
63
-
-
%
Po = 12 W, RL = 8 Ω
Po = 22 W, RL = 4 Ω
Thermal shutdown junction
temperature
Tj
-
-
-
145
°C
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Doc ID 1460 Rev 6
TDA2040
Electrical specifications
2.4
Characterizations
Figure 4.
Output power vs. supply voltage
Figure 5.
Figure 7.
Figure 9.
Output power vs. supply voltage
Figure 6.
Output power vs. supply voltage
Distortion vs. frequency
Figure 8.
SVRR vs. frequency
SVRR vs. voltage gain
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Electrical specifications
TDA2040
Figure 10. Quiescent drain current vs. supply Figure 11. Open loop gain vs. frequency
voltage
Figure 12. Power dissipation vs. output power
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TDA2040
Applications
3
Applications
3.1
Circuits and PCB layout
Figure 13. Amplifier with split power supply
Figure 14. PCB and components layout for the circuit of the amplifier with split
power supply
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Applications
Figure 15. Amplifier with single power supply
TDA2040
Note : In this case of highly inductive loads protection diodes may be necessary.
Figure 16. PCB and components layout for the circuit of the amplifier with single
power supply
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TDA2040
Applications
Figure 17. 30-watt bridge amplifier with split power supply
Figure 18. PCB and components layout for the circuit of the 30-watt bridge amplifier
with split power supply
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Applications
Figure 19. Two-way hi-fi system with active crossover
TDA2040
Figure 20. PCB and components layout for the circuit of the two-way hi-fi system
with active crossover
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TDA2040
Applications
3.2
Multiway speaker systems and active boxes
Multiway loudspeaker systems provide the best possible acoustic performance since each
loudspeaker is specially designed and optimized to handle a limited range of frequencies.
Commonly, these loudspeaker systems divide the audio spectrum into two, three or four
bands.
Figure 21. Frequency response
Figure 22. Power distribution vs. frequency
To maintain a flat frequency response over the hi-fi audio range the bands covered by each
loudspeaker must overlap slightly. Any imbalance between the loudspeakers produces
unacceptable results, therefore, it is important to ensure that each unit generates the correct
amount of acoustic energy for its segment of the audio spectrum. In this respect it is also
important to know the energy distribution of the music spectrum (see Figure 22) in order to
determine the cutoff frequencies of the crossover filters. As an example, a 100-W three-way
system with crossover frequencies of 400 Hz and 3 kHz would require 50 W for the woofer,
35 W for the midrange unit and 15 W for the tweeter.
Both active and passive filters can be used for crossovers but today active filters cost
significantly less than a good passive filter using air-cored inductors and non-electrolytic
capacitors. In addition, active filters do not suffer from the typical defects of passive filters:
●
●
●
power loss
increased impedance seen by the loudspeaker (lower damping)
difficulty of precise design due to variable loudspeaker impedance
Obviously, active crossovers can only be used if a power amplifier is provided for each drive
unit. This makes it particularly interesting and economically sound to use monolithic power
amplifiers.
In some applications, complex filters are not really necessary and simple RC low-pass and
high-pass networks (6 dB/octave) can be recommended. The results obtained are excellent
because this is the best type of audio filter and the only one free from phase and transient
distortion. The rather poor out-of-band attenuation of single RC filters means that the
loudspeaker must operate linearly well beyond the crossover frequency to avoid distortion.
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Applications
Figure 23. Active power filter
TDA2040
A more effective solution, named "Active Power Filter" by STMicroelectronics, is shown in
Figure 23. The proposed circuit can be realized by combined power amplifiers and
12-dB/octave or 18-dB/octave high-pass or low-pass filters.
The component values calculated for fc = 900Hz using a Bessel 3rd order Sallen and Key
structure are:
C1 = C2 = C3 = 22 nF
R1 = 8.2 kΩ
R2 = 5.6 kΩ
R3 = 33 kΩ
In the block diagram of Figure 24 is represented an active loudspeaker system completely
realized using power integrated circuit, rather than the traditional discrete transistors on
hybrids, very high quality is obtained by driving the audio spectrum into three bands using
active crossovers (TDA2320A) and a separate amplifier and loudspeakers for each band. A
modern subwoofer/midrange/tweeter solution is used.
Figure 24. High-power active loudspeaker system using TDA2030A and TDA2040
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TDA2040
Applications
3.3
Practical considerations
3.3.1
Printed circuit board
The layout shown in Figure 14 should be adopted by the designers. If different layouts are
used, the ground points of input 1 and input 2 must be well decoupled from the ground
return of the output in which a high current flows.
3.3.2
3.3.3
Assembly suggestion
No electrical isolation is needed between the package and the heatsink with single supply
voltage configuration.
Application suggestions
The recommended values of the components are those shown in the application circuit of
Figure 13. However, if different values are chosen then the following table can be helpful.
Table 5.
Variations from recommended values
Recommended
value
Larger than
recommended value
Smaller than
recommended value
Component
Purpose
Non-inverting
input biasing
Increase in input
impedance
Decrease in input
impedance
R1
R2
R3
22 kΩ
680 Ω
22 kΩ
Closed-loop
gain setting
Decrease in gain (1)
Increase in gain
Closed-loop
gain setting
Increase in gain
Decrease in gain (1)
Danger of oscillation at
high frequencies with
inductive loads
Frequency
stability
R4
4.ꢀ Ω
-
Input DC
decoupling
Increase in
low-frequency cut-off
C1
1 µF
-
-
-
-
-
Inverting DC
decoupling
Increase in
low-frequency cut-off
C2
22 µF
0.1 µF
220μF
0.1μF
Supply voltage
bypass
C3, C4
C5, C6
Cꢀ
Danger of oscillation
Danger of oscillation
Danger of oscillation
Supply voltage
bypass
Frequency
stability
1. The value of closed loop gain must be higher than 24 dB
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Package mechanical data
TDA2040
4
Package mechanical data
Figure 25. Pentawatt V outline drawing
mm
inch
DIM.
MIN. TYP. MAX. MIN.
TYP. MAX.
0.188
0.054
0.11
OUTLINE AND
MECHANICAL DATA
A
C
D
D1
E
E1
F
F1
G
G1
H2
H3
L
L1
L2
L3
L4
L5
L6
Lꢀ
L9
L10
M
4.80
1.3ꢀ
2.40
1.20
0.35
0.ꢀ6
0.80
1.00
3.20
6.60
2.80 0.094
1.35 0.04ꢀ
0.55 0.014
1.19 0.030
1.05 0.031
1.40 0.039
0.053
0.022
0.04ꢀ
0.041
0.055
Weight: 2.00gr
3.40
6.80
3.60 0.126 0.134 0.142
ꢀ.00 0.260 0.26ꢀ 0.2ꢀ5
10.40
10.40
0.41
0.409
1ꢀ.55 1ꢀ.85 18.15 0.691 0.ꢀ03 0.ꢀ15
15.55 15.ꢀ5 15.95 0.612 0.620 0.628
21.2
22.3
21.4
22.5
21.6 0.831 0.843 0.850
22.ꢀ 0.8ꢀ8 0.886 0.894
1.29
0.051
0.118
0.622
0.260
0.106
0.189
2.60
15.10
6.00
2.10
4.30
4.23
3.ꢀ5
3.00 0.102
15.80 0.594
6.60 0.236
2.ꢀ0 0.083
4.80 0.1ꢀ0
4.5
4.0
4.ꢀ5 0.16ꢀ 0.1ꢀ8 0.18ꢀ
4.25 0.148 0.15ꢀ 0.18ꢀ
40˚ (Typ.)
M1
V4
V5
DIA
Pentawatt V
90˚ (Typ.)
3.85 0.143
3.65
0.151
L
L1
E
M1
A
M
D
C
D1
V5
L2
L3
H2
L5
F
E1
E
V4
H3
G
G1
Dia.
F
F1
L9
L10
Lꢀ
H2
L4
V4
RESIN BETWEEN
LEADS
L6
PENTVME
0015981 F
In order to meet environmental requirements, ST offers these devices in different grades of
®
®
ECOPACK packages, depending on their level of environmental compliance. ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
®
ECOPACK is an ST trademark.
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TDA2040
Revision history
5
Revision history
Table 6.
Date
Document revision history
Revision
Changes
Apr-2003
3
Changes not recorded
Added features list on page 1
Updated minimum supply voltage to 4.5 V in Table 4 on page 4
Corrected the title of Figure 15 on page 8
Updated presentation
28-Oct-2010
4
Removed minimum value from Pentawatt (vertical) package
16-Jun-2011
1ꢀ-Jul-2012
5
6
dimension H3 (Figure 25); minor textual changes.
Updated output power throughout datasheet (title, Features,
Description, Table 4).
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TDA2040
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