SGS Thomson Microelectronics TDA7262 Datasheet

20+20W STEREO AMPLIFIER WITH STAND-BY

WIDESUPPLYVOLTAGERANGE
HIGHOUTPUTPOWER

28+28WTYP. MUSICPOWER
20+20W@ THD = 10%, R

HIGHCURRENT CAPABILITY(UP TO 3.5A)
STAND-BY FUNCTION
AC SHORT CIRCUIT PROTECTION
THERMAL OVERLOAD PROTECTION

=4Ω,VS= 28V

L

TDA7262

DESCRIPTION

The TDA7262is class AB dual Hi-Fi Audio power
amplifier assembled in Multiwatt package, spe­cilally designed for high quality stereo application
as Hi-Fi music centersand TV sets.

Figure1: Stereo Application Circuit with Stand-By

MULTIWATT11

ORDERING NUMBER: TDA7262

March 1995

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TDA7262

ABSOLUTE MAXIMUMRATINGS

Symbol Parameter Value Unit

V

I

O

I

O

P

tot

T

stg,Tj

PIN CONNECTION

Supply Voltage 35 V

S

Output Peak Current(repetitive f > 20Hz) 3.5 A
Output Peak Current(non repetitive, t > 100µs) 4.5 A
Power Dissipation (T

=70°C) 30 W

case

Storage and JunctionTemperature -40 to 150 °C

TEST CIRCUIT

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TDA7262

THERMAL DATA

Symbol Description Value Unit

R

th j-case

Thermal Resistance Junction-case Max 2.5 °C/W

ELECTRICAL CHARACTERISTICS (Refer to the stereo test circuit, VS= 28V; f = 1KHz; T

amb

unless otherwisespecified)

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

S

V

O

I

d

P

O

Supply Voltage 8 32 V
Quiescent Output Voltage VS= 32V 15.5 V
Total Quiescent Current VS= 28V

V

= 32V

S

65
70 120

Output Power (eachchannel) Music Power STD rules(T = 1s)

V

= 32V;d = 10%; RL=4Ω 28 W

S

d =10%
R

=4Ω

L

R

=8Ω 10

L

22
13

d=1%
R
R

=4Ω

L

=8Ω

L

18
10

d Total Harmonic Distortion f = 100Hz to 10KHz

P

CT Cross Talk R

G

∆G

e

V

i

R

i

f

L

f

H

V

N

Input Saturation Voltage (Vrms) 300 mV
Input Resistance f = 1KHz; non invertingInput 70 200 KΩ
Low Frequency roll-off(-3dB) RL=4Ω 40 Hz
High Frequency roll-off (-3dB) RL=4Ω 80 KHz
Closed Loop VoltageGain f = 1KHz 35.5 36 36.5 dB
Closed Loop Gain match 0.5 dB

V

Total Input NoiseVoltage A Curve; RS= 10KΩ 1.5 µV

SVR Supply Voltage Rejection

(each channel)

T

j

Thermal Shutdown Junction

= 0.1to 14W; RL=4Ω

O

P

= 0.1to 8W; RL=8Ω

O

=4Ω RS= 100Ω

L

f = 1KHz
f = 10KHz

f = 22Hz to 22KHz; R

= 0 to 10KΩ;fr= 100Hz

R

S

V

= 0.5V

r

= 10KΩ 2.5 8 µV

S

0.2

0.1

60
50

55 dB

145 °C

Temperature

STAND-BY FUNCTION

=25°C,

mA
mA

W
W

W
W

%
%

dB
dB

V

3

A

M

I

M

Stand-By Threshold VS= 32V 0.45 0.9 V
Stand-By Attenuation VS= 32V;V3< 0.45V 60 100 dB
Stand-By Quiescent Current VS= 32V;V3< 0.45V 3 5 mA

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TDA7262

APPLICATIONSUGGESTION

The recommended values of the components are those shown on application circuit of Figure 1. Differ­ent values can be used;the followingtable can helpthe designer.

Component

R1 and R3 1.3KΩ
R2 and R4 18Ω Decrease ofgain Increase of gain
R5 and R6 1Ω Frequency stability Danger of oscillations
C1 and C2 2.2µF Input DC decoupling higher turn-on delay - worse turn-ONpop

C3 22µF (**) - Ripple rejection

C4 100nF Supply setting Danger of oscillations
C5 1000µF Supply setting worse turn-OFF pop
C6 and C7 220µF Feedback input DC

C8 and C9 0.1µF Frequency stability Danger of oscillations
C10 and C11 1000µFto

(*) Closed loop gain must be higher than 26dB.
(**) 220µF in caseof stand-by utilization.

Recomm.

Value

2200µF

Purpose Larger than Smaller than

Close loop gain setting (*)

- Stand-by time constant

decoupling

Output DC decoupling Higher low-frequency

Increase of gain Decrease of gain

- higer low freq. cutoff.
Increase of noise

Increase of the
Switch-on time

- Degradation of SVR

- worse turn-OFFpop by
stand-by

cut-off

Figure2: Ouput Power vs. SupplyVoltage

Figure3: Ouput Power vs. SupplyVoltage

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TDA7262

Figure4: Distortion vs. OuputPower

Figure6: QuiescentCurrent vs. SupplyVoltage

Figure5: Distortion vs. OuputPower

Figure7: Supply Voltage Rejectionvs. Frequency

Figure8: Output Attenuationvs. Vpin3

Figure9: Total Power Dissipation & Efficiency

vs. Output Power

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TDA7262

Figure11: TotalPower Dissipation& Efficiency

vs. Output Power

BUILD-INPROTECTIONSYSTEMS
Thermalshut-down

The presence of a thermal limiting circuit offers
the following advantages:

1) an overloadon the output (even if it is perma­nent), or an excessive ambient temperature
can be easilywithstood.

2) the heatsink can have a smaller factor of
safety compared with that of a conventional
circuit. There is no device damage in the case
of excessive junction temperature; all that
happens is that P
I

are reduced. The maximum allowable

O

( and therefore Ptot) and

O

power dissipation depends upon the size of
the external heatsink (i.e. its thermal resis­tance); Figure 12 shows this dissipablepower
as a function of ambient temperature for dif­ferent thermal resistance.

Figure12

Shortcircuit (AC Conditions)

The TDA7262 can withstand accidental short cir­cuits across the speaker made by a wrong con­nectionduringnormal play operation.

MOUNTING INSTRCTIONS

The power dissipated in the circuit must be re­movedby adding an external heatsink.

Thanks to the MULTIWATT package attaching
the heatsink is very simple, a screw or a com­pression spring (clip) being sufficient. between
the heatsink and the package it is better to insert
a layer of silicon grease, to optimize the thermal
contact; no electrical isolation is needed between
the two surfaces.

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MULTIWATT11 PACKAGE MECHANICAL DATA

TDA7262

DIM.

A 5 0.197

B 2.65 0.104
C 1.6 0.063
D 1 0.039
E 0.49 0.55 0.019 0.022
F 0.88 0.95 0.035 0.037
G 1.45 1.7 1.95 0.057 0.067 0.077

G1 16.75 17 17.25 0.659 0.669 0.679
H1 19.6 0.772
H2 20.2 0.795

L 21.9 22.2 22.5 0.862 0.874 0.886

L1 21.7 22.1 22.5 0.854 0.87 0.886
L2 17.4 18.1 0.685 0.713
L3 17.25 17.5 17.75 0.679 0.689 0.699
L4 10.3 10.7 10.9 0.406 0.421 0.429
L7 2.65 2.9 0.104 0.114

M 4.25 4.55 4.85 0.167 0.179 0.191

M1 4.73 5.08 5.43 0.186 0.200 0.214

S 1.9 2.6 0.075 0.102

S1 1.9 2.6 0.075 0.102

Dia1 3.65 3.85 0.144 0.152

MIN. TYP. MAX. MIN. TYP. MAX.

mm inch

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TDA7262

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibilityfor the
consequences of use of such informationnor for any infringement ofpatents 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 SGS-THOMSON Microelectronics. Specifications men­tioned in thispublication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without ex­press written approval of SGS-THOMSON Microelectronics.

 1995 SGS-THOMSON Microelectronics - All Rights Reserved

MULTIWATT is aRegistered Trademark of SGS-THOMSON Microelectronics

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