SGS Thomson Microelectronics TDA7381 Datasheet
4 x 25W QUAD BRIDGE CAR RADIO AMPLIFIER
HIGHOUTPUTPOWERCAPABILITY:
4 x30W/4Ω MAX.
4 x25W/4ΩEIAJ
4 x18W/4Ω@ 14.4V, 1KHz, 10%
4 x15W/4Ω @ 13.2V,1KHz,10%
CLIPPINGDETECTOR
LOW DISTORTION
LOW OUTPUTNOISE
ST-BYFUNCTION
MUTEFUNCTION
AUTOMUTEAT MIN. SUPPLY VOLTAGE DE-
TECTION
DIAGNOSTICSFACILITYFOR:
– CLIPPING
– OUT TOGND SHORT
– OUT TOV
– THERMALSHUTDOWN
LOW EXTERNALCOMPONENTCOUNT:
– INTERNALLYFIXED GAIN (26dB)
– NOEXTERNALCOMPENSATION
– NOBOOTSTRAPCAPACITORS
Protections:
OUTPUT SHORT CIRCUIT TO GND, TO V
SHORT
S
TDA7381
PRELIMINARY DATA
Flexiwatt25
ACROSSTHE LOAD
VERYINDUCTIVE LOADS
OVERRATING CHIP TEMPERATURE WITH
SOFTTHERMAL LIMITER
LOADDUMP VOLTAGE
FORTUITOUSOPEN GND
REVERSEDBATTERY
ESD PROTECTION
DESCRIPTION
The TDA7381 is a new technology class AB
Audio Power Amplifier in Flexiwatt 25 package
,
S
designed for car radio applications.
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
October 1999
This is preliminary information on anew product now in development. Details are subject tochange without notice.
SVR TAB S-GND
DIAGN. OUT
OUT1+
OUT1PW-GND
OUT2+
OUT2PW-GND
OUT3+
OUT3PW-GND
OUT4+
OUT4PW-GND
D93AU002C
100nF2.200µF
1/10
TDA7381
DESCRIPTION(continued)
Thanks to the fully complementaryPNP/NPNoutput configurationthe TDA7381 allows a rail to rail
output voltage swing with no need of bootstrap
capacitors. The extremely reduced components
count allows very compact sets.
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
V
CC (DC)
V
CC (pk)
P
T
CC
I
O
tot
T
j
stg
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
Junction Temperature 150
Storage Temperature – 40 to150
The on-board clipping detector simplifies gain
compression operations. The fault diagnostics
makes it possible to detect mistakes during CarRadioassemblyand wiring in the car.
3
4
A
A
C
°
C
°
PIN CONNECTION
(Topview)
1 25
TAB
OUT2-
P-GND
ST-BY
CC
V
OUT2+
OUT1-
OUT1+
P-GND1
SVR
IN1
IN2
IN4
S-GND
IN3
OUT3+
AC-GND
OUT3-
P-GND3
CC
V
OUT4+
D94AU117B
MUTE
OUT4-
P-GND4
DIAGNOSTICS
THERMAL DATA
Symbol Parameter Value Unit
Thermal ResistanceJunction to Case Max. 1
2/10
R
th j-case
C/W
°
TDA7381
ELECTRICALCHARACTERISTICS
= 14.4V; f = 1KHz; Rg= 600Ω;RL=4Ω;T
(V
S
amb
=25°C;
Refer tothe Test and application circuit (fig.1), unless otherwisespecified.)
Symbol Parameter Test Condition Min. Typ. Max. Unit
I
q1
V
OS
G
v
P
o
P
o EIAJ
P
o max
THD Distortion P
e
No
SVR Supply Voltage Rejection f = 100Hz 50 65 dB
f
cl
f
ch
R
i
C
T
I
SB
V
SB out
V
SB IN
A
M
V
M out
V
Min
I
m (L)
I
CDOFF
I
CDON
(*) Saturated square wave output.
(**) Diagnostics output pulled-up to5V with 10KΩ series resistor.
Quiescent Current 180 300 mA
Output Offset Voltage 100 mV
Voltage Gain 25 26 27 dB
Output Power THD = 10%
THD = 1%
THD = 10%; V
THD = 1%; V
= 13.2V
S
= 13.2V
S
16.5
13
13.5
11
18
14
15
12
EIAJ Output Power(*) EIAJ (VS = 13.7V) 23 25 W
Max.Output Power (*) VS= 13.7V 28 30 W
= 4W 0.04 0.3 %
o
Output Noise ”A” Weighted
Bw = 20Hz to 20KHz
50
65 150
Low Cut-Off Frequency 20 Hz
High Cut-Off Frequency 75 KHz
Input Impedance 70 100 KΩ
Cross Talk f = 1KHz 50 70 dB
St-By Current Consumption St-By = LOW 100
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
51016µA
(Source Current)
Clipping Detector ”OFF” Output
THD = 1% (**) 100
Average Current
Clipping Detector ”ON” Output
THD = 10% (**) 100 240 350 µA
Average Current
W
W
W
W
µ
µV
µ
µ
V
A
A
3/10
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