ST TDA2052 User Manual

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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-

TEST AND APPLICATION CIRCUIT

Heptawatt

ORDERING NUMBER: TDA2052

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 onoff noises.

February 1997

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TDA2052

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

PIN CONNECTION (Top view)

7	NON INVERTING INPUT(PLAY)
6	INVERTING INPUT
5	NON INVERTING INPUT(MUTE)
4	-VS
3	STAND-BY/MUTE
2	+VS
1	OUTPUT
tab connected to pin 4	D95AU326

BLOCK DIAGRAM

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					TDA2052
THERMAL DATA
Symbol		Description			Value	Unit
Rth 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
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	VS = + 22.5, RL = 4Ω,
	IEC268-3 Rules (*)	d = 10%, t = 1s	50	60		W
PO	Output Power (continuous RMS)	d = 10%
		RL = 4Ω	35	40		W
		RL = 8Ω		22		W
		VS = +22V, RL = 8Ω	30	33		W
		d = 1%
		RL = 4Ω		32		W
		RL = 8Ω		17		W
		VS = +22V, RL = 8Ω		28		W
d	Total Harmonic Distortion	RL = 4Ω
		PO = 0.1 to 20W;
		f = 100Hz to 15KHz		0.1	0.7	%
		VS + 22V, RL = 8Ω
		PO = 0.1 to 20W;
		f = 100Hz to 15KHz		0.1	0.5	%
SR	Slew Rate		3	5		V/μs
GV	Open Loop Voltage Gain			80		dB
eN	Total Input Noise	A Curve		2		μV
		f = 20Hz to 20KHz		3	10	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 V2out/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.

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TDA2052

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	Decrease of Input
			Impedance	Impedance

R2	560Ω
R3	22KΩ (*)
R4	22KΩ (*)
R5	22KΩ
R6	4.7Ω
C1	1μF

Closed Loop Gain set to 32dB (**)

Input Impedance @ Mute

Stand-by Time Constant

Frequency Stability

Input DC Decoupling

Decrease of Gain	Increase of Gain
Increase of Gain	Decrease of Gain
Danger of oscillations	Danger of oscillations
	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

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