TDA2052 - Datasheet Catalog

® 

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 

TEST AND APPLICATION CIRCUIT 

Heptawatt V 

Heptawatt H 

ORDERING NUMBERS: 

TDA2052V 

TDA2052H 

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 highest 

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 onoff 

noises. 

January 2003 

This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice. 

1/14


ABSOLUTE MAXIMUM RATINGS 

Symbol Parameter Value Unit 

V S DC Supply Voltage ±25 V 

I O Output Peak Current (internally limited) 6 A 

P tot Power Dissipation T case = 70°C 30 W 

T op Operating Temperature Range 0 to +70 °C 

T stg , T j Storage and Junction Temperature -40 to +150 °C 

PIN CONNECTION (Top view) 

7 NON INVERTING INPUT(PLAY) 

6 

INVERTING INPUT 

5 

NON INVERTING INPUT(MUTE) 

4 

-V S 

3 

STAND-BY/MUTE 

2 

+V S 

1 

OUTPUT 

tab connected to pin 4 

D95AU326 

BLOCK DIAGRAM 

2/14


THERMAL DATA 

Symbol Description Value Unit 

R th j-case Thermal Resistance Junction-case Max 2.5 °C/W 

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 

V S Supply Range +6 +25 V 

I q Total Quiescent Current V S = +22V 20 40 70 mA 

I b Input Bias Current +0.5 µA 

V OS Input Offset Voltage +15 mV 

I OS Input Offset Current +200 nA 

P O 

Music Output Power 

IEC268-3 Rules (*) 

P O Output Power (continuous RMS) d = 10% 

RL = 4Ω 

R L = 8Ω 

V S = +22V, R L = 8Ω 

d = 1% 

R L = 4Ω 

R L = 8Ω 

V S = +22V, R L = 8Ω 

d Total Harmonic Distortion R L = 4Ω 

P O = 0.1 to 20W; 

f = 100Hz to 15KHz 

V S = + 22.5, R L = 4Ω, 

d = 10%, t = 1s 50 60 W 

V S + 22V, R L = 8Ω 

P O = 0.1 to 20W; 


0.1 0.5 % 

SR Slew Rate 3 5 V/µs 

G V Open Loop Voltage Gain 80 dB 

e N Total Input Noise A Curve 


35 

30 

40 

22 

33 

32 

17 

28 

0.1 

0.7 

2 

3 10 

R i Input Resistance 500 KΩ 

SVR Supply Voltage Rejection f = 100Hz, Vripple = 1VRMS 40 50 dB 

T S Thermal Shutdown 145 °C 

MUTE/STAND-BY FUNCTION (Ref. –VS) 

VT ST-BY Stand-by - Threshold 1 1.8 V 

VT PLAY Play Threshold 2.7 4 V 

I q ST-BY Quiescent Current @ Stand-by V pin 3 = 0.5V 1 3 mA 

ATT ST-BY Stand-by Attenuation 70 90 dB 

I pin3 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 V 2 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. 

W 

W 

W 

W 

W 

W 

% 

µV 

µV 

3/14


APPLICATIONS SUGGESTIONS (See Test and Application Circuit) 

The recommended values of the external components are those shown on the application circuit. Different 

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 

R2 560Ω Closed Loop Gain set to Decrease of Gain 

32dB (**) 

Decrease of Input 

Impedance 

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 

TYPICAL CHARACTERISTICS 

Figure 1: Output Power vs. Supply Voltage 

Figure 2: Distortion vs. Output Power 

4/14


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. 

5/14


Figure 9: Bandwidth. 

Figure 10: Output Attenuation & Quiescent Current 

vs. Vpin3. 

Figure 11: Total Power Dissipation & Efficiency 

vs. Output Power. 

Figure 12: Total Power Dissipation & Efficiency 

vs. Output Power. 

6/14


Figure 13: P.C. Board and Components Layout of the Circuit of Fig. 14 (1:1 scale) 

Figure 14: Demo Board Schematic. 

7/14


MUTE/STAND-BY FUNCTION 

The pin 3 (MUTE/STAND-BY) controls the amplifier 

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 generators 

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. 

8/14


SHORT-CIRCUIT PROTECTION 

The TDA 2052 has an original circuit which protects 

the device during accidental short-circuit between 

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 shortcircuit 

condition has been removed. In fact, a window 

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 connecting 

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 following 

condition is met: 

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 16: Thermal Protection Block Diagram 

The maximum allowable power dissipation depends 

on the size of the external heatsink (thermal 

resistance case-ambient); figure 17 shows 

the dissipable power as a function of ambient 

temperature for different thermal resistance. 

Figure 17: Maximum Allowable Power Dissipation 

vs. Ambient Temperature. 

R5 ≥ (V A − 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. 

9/14


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 individual 

amplifier 

- complete separation of the ways (if an amplifier 

is affected by clipping distortion, the others 

are not) 

- protection of tweeters (the high power harmonics 

generated by low frequency clipping 

can not damage the delicate tweeters that are 

driven by independent power amplifier) 

- high power dedicated to low frequencies 

Figure 18: Multiway Application Circuit 

10/14


As 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 connecting 

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 separate 

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 undistorted 

(THD = 0.01%), while the others two 

TDA2052 are used for driving the mid/high frequency 

speakers of L/R channels, delivering 

POUT = 25W (THD = 10%) and 20W @ THD = 

0.01% 

Figure 19: Frequency Response 

Figure 20: Distortion vs Output Power 

(Subwoofer) 

Figure 21:Distortion vs Output Power 

(Midrange/Tweeter) 

11/14


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 

Weight: 1.90gr 

OUTLINE AND 

MECHANICAL DATA 

Heptawatt V 

L 

L1 

E 

M1 

A 

C 

D1 

L2 

D 

M 

H2 

L5 

L3 

E 

F 

E1 

L9 

V4 

H3 

G G1 G2 

Dia. 

L10 

L4 

H2 

F 

L11 

L7 

L6 

HEPTAMEC 

0016069 

12/14


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 

OUTLINE AND 

MECHANICAL DATA 

Heptawatt H 

L1 

L9 

V5 

E 

D 

D1 

C 

A 

L3 

L2 

L7 

F 

G 

H2 

L4 

L5 

G1 

G2 

H2 

F 

Dia. 

H3 

E 

F 

E1 

Resin between 

leads 

L6 

L11 

L10 

HEPTHMEC.EPS 

0080180 

13/14


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of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is 

granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are 

subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products 

are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. 

The ST logo is a registered trademark of STMicroelectronics 

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14/14

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