SGS Thomson Microelectronics TDA7382 Datasheet



TDA7382

4 x 22W FOUR BRIDGE CHANNELS CAR RADIO AMPLIFIER

HIGHOUTPUTPOWERCAPABILITY:
4 x30W max./4Ω EIAJ
4 x22W/4Ω@ 14.4V, 1KHz, 10%
4 x18.5W/4Ω@ 13.2V,1KHz, 10%

CLIPPINGDETECTOR(THD =10%)
LOW DISTORTION
LOW OUTPUTNOISE
ST-BYFUNCTION
MUTEFUNCTION
AUTOMUTEAT MIN. SUPPLY VOLTAGE DE-

TECTION
LOW EXTERNALCOMPONENTCOUNT:

– INTERNALLYFIXED GAIN (26dB)
– NOEXTERNAL COMPENSATION
– NOBOOTSTRAP CAPACITORS

PROTECTIONS:

OUTPUT SHORT CIRCUIT TO GND, TO V
ACROSS THE LOAD

VERYINDUCTIVE LOADS
OVERRATING CHIP TEMPERATURE WITH

SOFT THERMALLIMITER
LOADDUMP VOLTAGE
FORTUITOUSOPEN GND

ORDERING NUMBER: TDA7382

REVERSEDBATTERY
ESD PROTECTION

DESCRIPTION

The TDA7382 is a new technology class AB
Audio Power Amplifier in Flexiwatt 25 package

,

S

designed for high end car radioapplications.
Thanks to the fully complementaryPNP/NPN out­put configuration the TDA7382 allows a rail to rail
output voltage swing with no need of bootstrap
capacitors. The extremely reduced components
count allows very compact sets. The on-board
clipping detector simplifies gain compression op­erations.

FLEXIWATT25

BLOCK AND APPLICATION DIAGRAM

Vcc1 Vcc2

ST-BY

MUTE

IN1

0.1µF

IN2

0.1µF

IN3

0.1µF

IN4

0.1µF

AC-GND

0.1µF47µF

September 1999

100nF2.200µF

CLIPPING DET.

OUT1+
OUT1­PW-GND

OUT2+
OUT2­PW-GND

OUT3+
OUT3­PW-GND

OUT4+
OUT4­PW-GND

SVR TAB S-GND

D98AU818

1/10

TDA7382

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

CC

V

CC (DC)

V

CC (pk)

I

O

P

tot

T

j

T

stg

PIN CONNECTION (Topview)

Operating Supply Voltage 18 V
DC Supply Voltage 28 V
Peak Supply Voltage (t = 50ms) 50 V
Output Peak Current:

Repetitive (Duty Cycle 10% at f = 10Hz)
Non Repetitive(t = 100µs)

Power dissipation, (T

=70°C) 80 W

case

4.5

5.5

Junction Temperature 150
Storage Temperature – 55 to150 °C

A
A

C

°

1 25

TAB

OUT2-

P-GND

ST-BY

OUT2+

V

CC

OUT1-

P-GND1

SVR

OUT1+

IN1

IN2

IN4

S-GND

IN3

OUT3+

AC-GND

OUT3-

P-GND3

V

CC

MUTE

OUT4+

D98AU820

OUT4-

P-GND4

CLIP. DET.

THERMAL DATA

Symbol Parameter Value Unit

Thermal Resistance Junction to Case Max. 1

2/10

R

th j-case

C/W

°

TDA7382

ELECTRICALCHARACTERISTICS(VS= 14.4V; f = 1KHz; Rg= 600Ω;RL=4Ω;T

amb

=25°C;

Refer to the Testand applicationcircuit (fig.1), unless otherwisespecified.)

Symbol Parameter Test Condition Min. Typ. Max. Unit

I

q1

V

OS

G

v

P

o

P

o max

THD Distortion P

e

No

SVR Supply Voltage Rejection f = 100Hz 50 65 dB

f

cl

f

ch

R

C

T

I

SB

V

SB out

V

SB IN

A

M

V

M out

V

Min

I

m (L)

CDL Clipping Detection THD Level 5 10 15 %

Quiescent Current 85 180 300 mA
Output Offset Voltage 100 mV
Voltage Gain 25 26 27 dB
Output Power THD = 10%

THD = 1%
THD = 10%; V
THD = 10%; V

THD = 5%; V
THD = 1%; V

THD = 10%; V
THD = 1%; V

= 13.5V

S

= 14V

S

= 14V

S

= 14V

S

= 13.2V

S

= 13.2V

S

20

16.5
17
19

17
16

17
14

22
18

20
21

19
17

18.5
15

Max. Output Power EIAJ RULES 27.5 30 W

= 4W 0.04 0.3 %

o

Output Noise ”A” Weighted

Bw = 20Hz to 20KHz

50
65

Low Cut-Off Frequency 20 Hz
High Cut-Off Frequency 75 KHz
Input Impedance 60 100 130 KΩ

i

Cross Talk f = 1KHz 50 70 dB
St-By Current Consumption St-By = LOW 20 100 µA
St-By OUT ThresholdVoltage (Amp: ON) 3.5 V
St-By IN Threshold Voltage (Amp: OFF) 1.5 V
Mute Attenuation VO= 1Vrms 80 90 dB
Mute OUT Threshold Voltage (Amp: Play) 3.5 V
Mute IN Threshold Voltage (Amp: Mute) 1.5 V
Muting Pin Current V

MUTE

= 1.5V

51316

(Source Current)

120
150

W
W

W
W

W
W

W
W

µV

V

µ

A

µ

3/10

TDA7382

Figure 1: StandardTest and Application Circuit

ST-BY

MUTE

IN1

IN2

IN3

IN4

R1

10K

R2

47K

C1

0.1µF

C2 0.1µF

C3 0.1µF

C4 0.1µF

C9

1µF

C10
1µF

S-GND

C8

0.1µF

4

22

11

12

15

14

13

16 10 25 1

C5

0.1µF

C7

2200µF

Vcc1-2 Vcc3-4

SVR TAB

C6

47µF

620

9
8
7

5
2
3

17
18
19

21
24
23

OUT1

OUT2

OUT3

OUT4

D98AU819

4/10

CLIPPING DET.

Figure 2: P.C.B. and componentlayout of the figure 1 (1:1scale)

TDA7382

COMPONENTS &
TOP COPPER LAYER

TDA7382

BOTTOM COPPER LAYER

5/10

TDA7382

Figure 3: QuiescentCurrent vs. Supply Voltage

Figure4: Quiescent Output Voltage vs. Supply

Voltage

Figure 5: Output Power vs. SupplyVoltage Figure6: Distortionvs. Output Power

Figure 7: Distortion vs. Frequency.

6/10

Figure 8: Supply Voltage Rejection vs.

Frequencyby varyingC6

Rg= 600
V

ripple

Ω

= 1Vrms

TDA7382

Figure 9: Output Noise vs. Source Resistance Figure10: Power Dissipation & Efficiency vs.

(W)

tot

OutputPower

P

tot

P

Rg(Ω)

INPUT STAGE
The TDA7382’S inputs are ground-compatible

and can stand very high input signals (± 8Vpk)
without any performancesdegradation.

If the standard value for the input capacitors
(0.1µF) is adopted, the low frequency cut-off will
amount to 16 Hz.

STAND-BYAND MUTING
STAND-BY and MUTING facilities are both

CMOS-COMPATIBLE. If unused, a straight con­nection to Vs of theirrespective pins wouldbe ad­missible. Conventionallow-power transistors can
be employed to drive muting and stand-by pins in

Figure 11: Input/OutputBiasing.

100KΩ

F

0.1µ

C1 ÷ C4

IN

absence of true CMOS ports or microprocessors.
R-C cells have always to be used in order to

smooth down the transitions for preventing any
audibletransient noises.

Since a DC current of about 10 uA normally flows
out of pin 22, the maximum allowable muting-se­ries resistance (R

) is 70KΩ, which is sufficiently

2

high to permit a muting capacitor reasonably
small(about 1µF).

If R

is higher than recommended, the involved

2

risk will be that the voltage at pin 22 may rise to
above the 1.5 V threshold voltage and the device
will consequently fail to turn OFF when the mute
line is brought down.

About the stand-by, the time constant to be as-

+

-

8KΩ

400Ω

V

S

10KΩ

10KΩ

SVR AC_GND

100KΩ70KΩ

47µ

C6

F

0.1µ
C5

F

400Ω

8KΩ

-

+

TOWARDS

OTHER CHANNELS

D95AU302

7/10

TDA7382

signed in order to obtain a virtually pop-free tran­sition has to be slowerthan 2.5V/ms.

CLIPPING DETECTOR
The CLIPPING DETECTOR acts in a wayto out-

put a signal as soon as one or more outputs
reachor trespassa typical THD level of 10%.

As a result, the clipping-related signal at pin 25
takes the form of pulses, which are syncronized
with each single clipping event in the music pro­gram. Applications making use of this facility
usually operatea filtering/integrationof thepulses
train through passive R-C networks and realize a
volume (or tone bass) stepping down in associa­tion with microprocessor-drivenaudioprocessors.

The maximum load that pin 25 can sustain is
Figure 12: Diagnosticscircuit.

Vpin 25

R

D97AU810

VREF

25

TDA7382

1KΩ.
Due to its operating principles, the clipping detec-

tor has to be viewed mainly as a power-depend­ent feature rather than frequency-dependent.This
means that clipping state causing THD = 10%
typ. will be immediately signaled out whenever a
fixed power level is reached, regardless of the
audiofrequency.

In other words, this feature offers the means to
counteract the extremely sound-damaging effects
of heavy clipping,caused by a suddenincrease of
odd order harmonics and appearance of serious
intermodulationphenomena.

Figure13: Clipping Detection Waveforms.

VO

ICLIP

0

AUDIO

OUTPUT

SIGNAL

D97AU811

CLIPPING

DET.

OUTPUT

CURR.

time

Figure 14: DiagnosticsWaveforms.

PIN

ST-BY
VOLTAGE

PIN

MUTE
VOLTAGE

Vs

OUTPUT

WAVEFORM

25

Vpin

WAVEFORM

CLIPPING

t

t

t

t

D97AU812A

8/10

TDA7382

DIM.

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

mm inch

A 4.45 4.50 4.65 0.175 0.177 0.183
B 1.80 1.90 2.00 0.070 0.074 0.079
C 1.40 0.055
D 0.75 0.90 1.05 0.029 0.035 0.041
E 0.37 0.39 0.42 0.014 0.015 0.016

F (1) 0.57 0.022

G 0.80 1.00 1.20 0.031 0.040 0.047

G1 23.75 24.00 24.25 0.935 0.945 0.955

H (2) 28.90 29.23 29.30 1.138 1.150 1.153

H1 17.00 0.669
H2 12.80 0.503
H3 0.80 0.031

L (2) 22.07 22.47 22.87 0.869 0.884 0.904

L1 18.57 18.97 19.37 0.731 0.747 0.762

L2 (2) 15.50 15.70 15.90 0.610 0.618 0.626

L3 7.70 7.85 7.95 0.303 0.309 0.313
L4 5 0.197
L5 3.5 0.138

M 3.70 4.00 4.30 0.145 0.157 0.169

M1 3.60 4.00 4.40 0.142 0.157 0.173

N 2.20 0.086
O 2 0.079

R 1.70 0.067
R1 0.5 0.02
R2 0.3 0.12
R3 1.25 0.049
R4 0.50 0.019

V5°(Typ.)
V1 3° (Typ.)
V2 20°(Typ.)
V3 45°(Typ.)

(1): dam-bar protusion not included
(2): molding protusion included

OUTLINE AND

MECHANICAL DATA

Flexiwatt25

L2

H

V3

OL3 L4

V

C

H3

G

H1

G1

R3

H2

F

A

R4

N

V2

R2

R

L

L1

V1

R2

B

V

FLEX25ME

L5

R1

R1 R1

V1

D

E

M1

M

9/10

TDA7382

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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.

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 1999 STMicroelectronics – Printed in Italy – All Rights Reserved

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