This document provides information on the TDA2052, a 60W audio power amplifier integrated circuit intended for use in TV or hi-fi applications. It can provide up to 60W of output power into 4 or 8 ohm loads from a supply of up to ±25V. It has features such as mute/standby functions, short circuit protection, and thermal shutdown to protect the device. The document includes specifications, application notes and circuit diagrams to illustrate use of the TDA2052 integrated circuit.
IMPLICATIONS OF THE ABOVE HOLISTIC UNDERSTANDING OF HARMONY ON PROFESSIONAL E...
60W Hi-Fi AUDIO POWER AMP TDA2052
1. TDA2052
60W Hi-Fi AUDIO POWER AMPLIFIER
WITH MUTE / STAND-BY
SUPPLY VOLTAGE RANGE UP TO ±25V
SPLIT SUPPLY OPERATION
HIGH OUTPUT POWER
(UP TO 60W MUSIC POWER)
LOW DISTORTION
MUTE/STAND-BY FUNCTION
NO SWITCH ON/OFF NOISE
AC SHORT CIRCUIT PROTECTION
THERMAL SHUTDOWN
ESD PROTECTION
DESCRIPTION
The TDA2052 is a monolithic integrated circuit in
Heptawatt package, intended for use as audio
class AB amplifier in TV or Hi-Fi field application.
Thanks to the wide voltage range and to the high
out current capability it’s able to supply the high-
est power into both 4Ω and 8Ω loads even in
presence of poor supply regulation.
The built in Muting/Stand-by function simplifies
the remote operations avoiding also switching on-
off noises.
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
January 2003
®
Heptawatt V Heptawatt H
ORDERING NUMBERS:
TDA2052V TDA2052H
TEST AND APPLICATION CIRCUIT
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2. ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VS DC Supply Voltage ±25 V
IO Output Peak Current (internally limited) 6 A
Ptot Power Dissipation Tcase = 70°C 30 W
Top Operating Temperature Range 0 to +70 °C
Tstg, Tj Storage and Junction Temperature -40 to +150 °C
BLOCK DIAGRAM
1
2
3
4
5
6
7 NON INVERTING INPUT(PLAY)
INVERTING INPUT
-VS
STAND-BY/MUTE
+VS
OUTPUT
D95AU326tab connected to pin 4
NON INVERTING INPUT(MUTE)
PIN CONNECTION (Top view)
TDA2052
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3. ELECTRICAL CHARACTERISTICS (Refer to the test circuit, GV = 32dB; VS + 18V; f = 1KHz; Tamb =
25°C, unless otherwise specified.)
Symbol Parameter Test Condition Min. Typ. Max. Unit
VS Supply Range +6 +25 V
Iq Total Quiescent Current VS = +22V 20 40 70 mA
Ib Input Bias Current +0.5 µA
VOS Input Offset Voltage +15 mV
IOS Input Offset Current +200 nA
PO Music Output Power
IEC268-3 Rules (*)
VS = + 22.5, RL = 4Ω,
d = 10%, t = 1s 50 60 W
PO Output Power (continuous RMS) d = 10%
RL = 4Ω
RL = 8Ω
VS = +22V, RL = 8Ω
35
30
40
22
33
W
W
W
d = 1%
RL = 4Ω
RL = 8Ω
VS = +22V, RL = 8Ω
32
17
28
W
W
W
d Total Harmonic Distortion RL = 4Ω
PO = 0.1 to 20W;
f = 100Hz to 15KHz
VS + 22V, RL = 8Ω
PO = 0.1 to 20W;
f = 100Hz to 15KHz
0.1
0.1
0.7
0.5
%
%
SR Slew Rate 3 5 V/µs
GV Open Loop Voltage Gain 80 dB
eN Total Input Noise A Curve
f = 20Hz to 20KHz
2
3 10
µV
µV
Ri Input Resistance 500 KΩ
SVR Supply Voltage Rejection f = 100Hz, Vripple = 1VRMS 40 50 dB
TS Thermal Shutdown 145 °C
MUTE/STAND-BY FUNCTION (Ref. –VS)
VTST-BY Stand-by - Threshold 1 1.8 V
VTPLAY Play Threshold 2.7 4 V
Iq ST-BY Quiescent Current @ Stand-by Vpin 3 = 0.5V 1 3 mA
ATTST-BY Stand-by Attenuation 70 90 dB
Ipin3 Pin 3 Current @ Stand-by –1 +10 µA
Note (*):
MUSIC POWER CONCEPT
MUSIC POWER is ( according to the IEC clauses n.268-3 of Jan 83) the maximal power which the amplifier is capable of producing across the
rated load resistance (regardless of non linearity) 1 sec after the application of a sinusoidal input signal of frequency 1KHz.
According to this definition our method of measurement comprises the following steps:
1) Set the voltage supply at the maximum operating value -10%
2) Apply a input signal in the form of a 1KHz tone burst of 1 sec duration; the repetition period of the signal pulses is > 60 sec
3) The output voltage is measured 1 sec from the start of the pulse
4) Increase the input voltage until the output signal show a THD = 10%
5) The music power is then V2
out/R1, where Vout is the output voltage measured in the condition of point 4) and R1 is the rated load impedance
The target of this method is to avoid excessive dissipation in the amplifier.
THERMAL DATA
Symbol Description Value Unit
Rth j-case Thermal Resistance Junction-case Max 2.5 °C/W
TDA2052
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4. APPLICATIONS SUGGESTIONS (See Test and Application Circuit)
The recommended values of the external components are those shown on the application circuit. Differ-
ent values can be used; the following table can help the designer.
Comp. Value Purpose Larger Than Smaller Than
R1 22KΩ (*) Input Impedance Increase of Input
Impedance
Decrease of Input
Impedance
R2 560Ω Closed Loop Gain set to
32dB (**)
Decrease of Gain Increase of Gain
R3 22KΩ (*) Increase of Gain Decrease of Gain
R4 22KΩ (*) Input Impedance @ Mute
R5 22KΩ Stand-by Time Constant
R6 4.7Ω Frequency Stability Danger of oscillations Danger of oscillations
C1 1µF Input DC Decoupling Higher Low-frequency
cut-off
C2 10µF Feedback DC Decoupling Higher Low-frequency
cut-off
C3 10µF Stand-by Time Constant
C4 0.100µF Frequency Stability Danger of Oscillations
C5, C6 1000µF Supply Voltage Bypass
(*) R1 = R3 = R4 for POP optimization
(**) Closed Loop Gain has to be ≥ 30dB
Figure 1: Output Power vs. Supply Voltage Figure 2: Distortion vs. Output Power
TYPICAL CHARACTERISTICS
TDA2052
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5. Figure 3: Output Power vs. Supply Voltage. Figure 4: Distortion vs. Output Power.
Figure 5: Distortion vs. Frequency. Figure 6: Distortion vs. Frequency.
Figure 7: Quiescent Current vs. Supply Voltage Figure 8: Supply Voltage Rejection vs. Frequency.
TDA2052
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6. Figure 9: Bandwidth. Figure 10: Output Attenuation & Quiescent Cur-
rent vs. Vpin3.
Figure 11: Total Power Dissipation & Efficiency
vs. Output Power.
Figure 12: Total Power Dissipation & Efficiency
vs. Output Power.
TDA2052
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7. Figure 13: P.C. Board and Components Layout of the Circuit of Fig. 14 (1:1 scale)
Figure 14: Demo Board Schematic.
TDA2052
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8. MUTE/STAND-BY FUNCTION
The pin 3 (MUTE/STAND-BY) controls the ampli-
fier status by three different thresholds, referred
to -VS.
When its voltage is lower than the first threshold
(1V, with a +70mV hysteresis), the amplifier is in
STAND-BY and all the final stage current gener-
ators are off. Only the input MUTE stage is on in
order to prevent pop-on problems.
At Vpin3=1.8V the final stage current generators
are switched on and the amplifier operates in
MUTE.
For Vpin3 =2.7V the amplifier is definitely on
(PLAY condition)
Figure 15.
TDA2052
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9. SHORT-CIRCUIT PROTECTION
The TDA 2052 has an original circuit which pro-
tects the device during accidental short-circuit be-
tween output and GND / -Vs / +Vs, taking it in
STAND-BY mode, so limiting also dangerous DC
current flowing throught the loudspeaker.
If a short-circuit or an overload dangerous for the
final transistors are detected, the concerned SOA
circuit sends out a signal to the latching circuit
(with a 10µs delay time that prevents fast random
spikes from inadvertently shutting the amplifier
off) which makes Q1 and Q2 saturate (see Block
Diagram). Q1 immediately short-circuits to ground
the A point turning the final stage off while Q2
short-circuits to ground the external capacitor
driving the pin 3 (Mute/Stand-by) towards zero
potential.
Only when the pin 3 voltage becomes lower than
1V, the latching circuit is allowed to reset itself
and restart the amplifier, provided that the short-
circuit condition has been removed. In fact, a win-
dow comparator is present at the output and it is
aimed at preventing the amplifier from restarting if
the output voltage is lower than 0.35 Total Supply
Voltage or higher than 0.65 Total Supply Voltage.
If the output voltage lies between these two
thresholds, one may reasonably suppose the
short-circuit has been removed and the amplifier
may start operating again.
The PLAY/MUTE/STAND-BY function pin (pin 3)
is both ground- and positive supply-compatible
and can be interfaced by means of the R5, C3 net
either to a TTL or CMOS output (µ-Processor) or
to a specific application circuit.
The R5, C3 net is fundamental, because connect-
ing this pin directly to a low output impedance
driver such as TTL gate would prevent the correct
operation during a short-circuit. Actually a final
stage overload turns on the protection latching
circuit that makes Q2 try to drive the pin 3 voltage
under 0.8 V. Since the maximum current this pin
can stand is 3 mA, one must make sure the fol-
lowing condition is met:
R5 ≥
(VA − 0.7V)
3mA
that yields: R5, min = 1.5 KΩ with VA=5V.
In order to prevent pop-on and -off transients, it is
advisable to calculate the C3, R5 net in such a
way that the STAND-BY/MUTE and MUTE/PLAY
threshold crossing slope (positive at the turn-on
and vice-versa) is less than 100 V/sec.
Figure 16: Thermal Protection Block Diagram
THERMAL PROTECTION
The thermal protection operates on the 125µA
current generator, linearly decreasing its value
from 90°C on. By doing this, the A voltage slowly
decreases thus switching the amplifier first to
MUTE (at 145°C) and then to STAND-BY
(155°C).
Figure 17: Maximum Allowable Power Dissipa-
tion vs. Ambient Temperature.
The maximum allowable power dissipation de-
pends on the size of the external heatsink (ther-
mal resistance case-ambient); figure 17 shows
the dissipable power as a function of ambient
temperature for different thermal resistance.
TDA2052
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10. Figure 18: Multiway Application Circuit
APPLICATION NOTES
90W MULTIWAY SPEAKER SYSTEM
The schematic diagram of figure 18, shows the
solution that we have closen as a suggestion for
Hi-Fi and especially TV applications.
The multiway system provides the separation of
the musical signal not only for the loudspeakers,
but also for the power amplifiers with the following
advantages:
- reduced power level required of each individ-
ual amplifier
- complete separation of the ways (if an ampli-
fier is affected by clipping distortion, the oth-
ers are not)
- protection of tweeters (the high power har-
monics generated by low frequency clipping
can not damage the delicate tweeters that are
driven by independent power amplifier)
- high power dedicated to low frequencies
TDA2052
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11. Figure 21:Distortion vs Output Power
(Midrange/Tweeter)
Figure 20: Distortion vs Output Power
(Subwoofer)
Figure 19: Frequency ResponseAs shown in Figure 19, the R-C passive network
for low-pass and High-pass give a cut with a
slope of 12dB/octave
A further advantage of this application is that con-
necting each speaker direcly to its amplifier, the
musical signal is not modified by the variations of
the impedance of the crossover over frequency.
The subwoofer is designed for obtaining high
sound pressure level with low distortion without
stereo effect.
In the application of figure 18, the subwoofer
plays the 20 to 300 Hz frequency range, while the
remaining 300 Hz to 20KHz are sent to two sepa-
rate channels with stereo effect.
The multiway system makes use of three
TDA2052, one for driving the subwoofer with
POUT higher than 40W (THD = 10%), 28W undis-
torted (THD = 0.01%), while the others two
TDA2052 are used for driving the mid/high fre-
quency speakers of L/R channels, delivering
POUT = 25W (THD = 10%) and 20W @ THD =
0.01%
TDA2052
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12. Weight: 1.90gr
Heptawatt V
DIM.
mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 4.8 0.189
C 1.37 0.054
D 2.4 2.8 0.094 0.110
D1 1.2 1.35 0.047 0.053
E 0.35 0.55 0.014 0.022
E1 0.7 0.97 0.028 0.038
F 0.6 0.8 0.024 0.031
G 2.34 2.54 2.74 0.095 0.100 0.105
G1 4.88 5.08 5.28 0.193 0.200 0.205
G2 7.42 7.62 7.82 0.295 0.300 0.307
H2 10.4 0.409
H3 10.05 10.4 0.396 0.409
L 16.7 16.9 17.1 0.657 0.668 0.673
L1 14.92 0.587
L2 21.24 21.54 21.84 0.386 0.848 0.860
L3 22.27 22.52 22.77 0.877 0.891 0.896
L4 1.29 0.051
L5 2.6 2.8 3 0.102 0.110 0.118
L6 15.1 15.5 15.8 0.594 0.610 0.622
L7 6 6.35 6.6 0.236 0.250 0.260
L9 0.2 0.008
L10 2.1 2.7 0.082 0.106
L11 4.3 4.8 0.169 0.190
M 2.55 2.8 3.05 0.100 0.110 0.120
M1 4.83 5.08 5.33 0.190 0.200 0.210
V4 40 (typ.)
Dia 3.65 3.85 0.144 0.152
A
L
L1
C
D1
L5
L2
L3
D
E
M1
M
H3
Dia.
L7
L11
L10
L6
H2
F
G G1 G2
E1
F
E
L9
V4
L4
H2
HEPTAMEC
0016069
OUTLINE AND
MECHANICAL DATA
TDA2052
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13. OUTLINE AND
MECHANICAL DATA
L2L3
E
D
V5
C A
F
L7
L6
L4
H2
F
L5
L10
L11
H3
HEPTHMEC.EPS
Dia.
L1 L9
G
G1
G2
H2
D1
E1
F
E
Resin between
leads
DIM.
mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 4.80 0.188
C 1.37 0.054
D 2.40 2.80 0.094 0.11
D1 1.20 1.35 0.047 0.053
E 0.35 0.55 0.014 0.022
E1 0.70 0.97 0.03 0.036
F 0.60 0.80 0.024 0.031
G 2.34 2.54 2.74 0.092 0.1 0.108
G1 4.88 5.08 5.28 0.192 0.2 0.208
G2 7.42 7.62 7.8 0.292 0.3 0.307
H2 10.40 0.41
H3 10.05 10.40 0.395 0.409
L1 3.90 4.20 4.50 0.153 0.165 0.177
L2 18.10 18.40 18.70 0.712 0.724 0.736
L3 4.88 5.08 5.28 0.192 0.2 0.208
L4 1.29 0.05
L5 2.60 3.00 0.102 0.118
L6 15.10 15.80 0.594 0.622
L7 6.00 6.60 0.236 0.260
L9 3.9 4.2 4.5 0.153 0.165 0.177
L10 2.10 2.70 0.083 0.106
L13 4.30 4.80 0.169 0.189
V5 89˚ (Min.), 90˚ (Typ.), 91˚ (Max.)
DIA 3.65 3.85 0.143 0.151
Heptawatt H
0080180
TDA2052
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