Datasheet TDA7384A Datasheet (SGS Thomson Microelectronics)



4 x 35W QUAD BRIDGE CAR RADIO AMPLIFIER

HIGHOUTPUTPOWERCAPABILITY:
4 x40W/4Ω MAX.
4 x35W/4ΩEIAJ
4 x25W/4Ω@ 14.4V, 1KHz, 10%
4 x22W/4Ω @ 13.2V,1KHz,10%

LOW DISTORTION
LOW OUTPUTNOISE
ST-BYFUNCTION
MUTEFUNCTION
AUTOMUTEAT MIN. SUPPLY VOLTAGE DE-

TECTION
LOW EXTERNALCOMPONENTCOUNT:

– INTERNALLYFIXED GAIN (26dB)
– NO EXTERNALCOMPENSATION
– NO BOOTSTRAPCAPACITORS

PROTECTIONS:

OUTPUT SHORT CIRCUIT TO GND, TO V
ACROSS THE LOAD

VERYINDUCTIVE LOADS
OVERRATING CHIP TEMPERATURE WITH

SOFT THERMALLIMITER
LOADDUMP VOLTAGE

BLOCK AND APPLICATION DIAGRAM

TDA7384A

FLEXIWATT25

ORDERING NUMBER: TDA7384A

FORTUITOUSOPEN GND
REVERSEDBATTERY
ESD

DESCRIPTION

The TDA7384A is a new technology class AB
Audio Power Amplifier in Flexiwatt 25 package

,

S

designed for high end car radioapplications.
Thanks to thefully complementaryPNP/NPN out-

put configurationthe TDA7384Aallows a rail to
rail output voltage swing with no need of boot­strapcapacitors.The extremelyreduced compo­nentscount allows very compact sets.

October 1999

IN1

IN2

IN3

IN4

Vcc1 Vcc2

ST-BY

MUTE

0.1µF

0.1µF

0.1µF

0.1µF

AC-GND

0.47µF47µF

SVR TAB S-GND

100nF470µF

N.C.

OUT1+
OUT1­PW-GND

OUT2+
OUT2­PW-GND

OUT3+
OUT3­PW-GND

OUT4+
OUT4­PW-GND

D99AU1018

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TDA7384A

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 °C
Storage Temperature – 55 to150 °C

A
A

1 25

TAB

OUT2-

P-GND2

ST-BY

CC

V

OUT2+

OUT1-

P-GND1

SVR

OUT1+

IN1

IN2

IN4

S-GND

IN3

OUT3+

AC-GND

OUT3-

P-GND3

CC

V

MUTE

OUT4+

D94AU159A

OUT4-

P-GND4

HSD

THERMAL DATA

Symbol Parameter Value Unit

Thermal Resistance Junction to Case Max. 1

2/9

R

th j-case

C/W

°

TDA7384A

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

amb

=25°C;

Refer to the test and application diagram, unless otherwise specified.)

Symbol Parameter Test Condition Min. Typ. Max. Unit

Quiescent Current RL=
Output Offset Voltage Play Mode
During mute ON/OFF output

V

dV

I

q1
OS

OS

offset voltage

G

v

dG

P

o

Voltage Gain 25 26 27 dB
Channel Gain Unbalance ±1dB

v

Output Power VS= 13.2V; THD = 10%

V

V
P
P

o EIAJ
o max.

EIAJ Output Power (*) VS = 13.7V 32 35 W
Output Power (*) VS= 14.4V 38 40 W

THD Distortion P

e

No

Output Noise ”A Weighted”

Bw = 20Hz to 20KHz

SVR Supply Voltage Rejection f = 100Hz; V

f

ch

R

C

T

High Cut-Off Frequency PO= 0.5W 100 200 KHz
Input Impedance 70 100 KΩ

i

Cross Talk f = 1KHz PO=4W

f = 10KHz P

St-By Current Consumption V
St-by pin Current VSt-By= 1.5V to 3.5V
St-By Out ThresholdVoltage (Amp: ON) 3.5 V
St-By in Threshold Voltage (Amp: OFF) 1.5 V
Mute Attenuation P
Mute Out Threshold Voltage (Amp: Play) 3.5 V
Mute In Threshold Voltage (Amp: Mute) 1.5 V
VSAutomute Threshold (Amp: Mute)

V

V

V

V

V

I

SB

I

pin4

SB out

SB in

A

M

M out

Min

AM in

Att≥80dB; P

(Amp: Play)

Att < 0.1dB; P

I

pin22

Muting Pin Current V

(Sourced Current)

(*) Saturated square wave output.

∞

= 13.2V; THD = 0.8%

S

= 14,4V; THD = 10%

S

= 4W 0.04 0.15 %

o

= 1Vrms 50 65 dB

r

=4W

O

= 1.5V 100

St-By

=4W 80 90 dB

Oref

=4W

Oref

= 0.5W 7.6

O

= 1.5V

MUTE

120 190 350 mA

80 mV

±

80 mV

±

20
15
24

60
50

22
17
26

50
70

70
60

70

100

–
–

10

±

6.5

8.5

51120µA

W
W
W

µV
µ

dB
dB

µ
µ

V
V

V

A
A

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TDA7384A

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

0.1µF

4

22

11

12

15

14

13

C5

0.47µF

C8

16 10 25 1

C7

2200µF

Vcc1-2 Vcc3-4

620

SVR TAB

C6

47µF

HSD

9
8
7

5
2
3

17
18
19

21
24
23

OUT1

OUT2

OUT3

OUT4

D95AU335B

4/9

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

COMPONENTS &
TOP COPPER LAYER

TDA7384A

BOTTOM COPPER LAYER

5/9

TDA7384A

Figure 3: QuiescentCurrent vs. Supply Voltage

Figure4: QuiescentOutputVoltage vs. Supply

Voltage

Figure 5: OutputPower vs. Supply Voltage Figure6: Distortionvs. Output Power

Figure 7: Distortionvs. Frequency

VS=14.4V
R

=4Ω

L

P

=1W

O

6/9

Figure 8: SupplyVoltage Rejection vs.

Frequency.

TDA7384A

Figure 9: OutputNoise vs. Source Resistance

APPLICATIONHINTS (ref.to the circuit of fig. 1)

SVR
Besides its contributionto the ripple rejection, the

SVR capacitor governs the turn ON/OFF time se­quence and, consequently,plays an essential role
in the pop optimization during ON/OFF transients.
To conveniently serve both needs, ITS MINIMUM
RECOMMENDED VALUE IS 10µF.

INPUT STAGE
The TDA7384A’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

Figure10: Power Dissipation & Efficiency vs.

OutputPower

CMOS-COMPATIBLE. If unused, a straight con­nectionto Vs of their respective pins would be ad­missible. Conventional/low-powertransistors can
be employed to drive muting and stand-by pins 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 as­signed in order to obtain a virtually pop-free tran­sitionhas to be slower than 2.5V/ms.

7/9

TDA7384A

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 protusionincluded

OUTLINE AND

MECHANICALDATA

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

R1

L5

V1

R1 R1

E

M1

M

D

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TDA7384A

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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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