HIGH OUTPUT POWER CAPABILITY:
2 x 40W max./4Ω
2 x 35W/4Ω EIAJ
2 x 25W4Ω @ 14.4V, 1KHz, 10%
2 x 37W2Ω @ 14.4V, 1KHz, 10%
2Ω DRIVING
DIFFERENTIAL INPUTS
MINIMUM EXTERNAL COMPONEN T COUNT
INTERNALLY FIXED GAIN (26dB)
MUTE FUNCTION (CMOS COMPAT IBLE)
AUTOMUTE AT MINIMUM SUPPLY VOLT-
AGE DETECTION
STAND-BY FUNCTION
NO AUDIBLE POP DURING MUTE AND ST-
BY OPERATIONS
CLIPPING DETE CTOR WITH PROGRAMMA-
BLE DISTORTION THR ESHOLD
PROTECTIONS:
SHORT CIRCUIT (OUT TO GROUND, OUT
TO SUPPLY VOLTAGE, ACROSS THE
LOAD)
OVERRATING CHIP TEMPERATURE WITH
SOFT THERMAL LIMITER
LOAD DUMP VOLTAGE
FORTUITOUS OPEN GROUND
LOUDSPEAKER DC CURRE NT
ESD
TDA7376B
MULTIWATT15
ORDERING NUMBER:
DESCRIPTION
The TDA7376B is a new technology dual bridge
Audio Amplifier in Multiwatt 15 package designed
for car radio applications. Thanks to the fully complementary PNP/NPN output stage configuration
the TDA7376B delivers a rail-to-rail voltage swing
with no need of boo tstrap capacitors. Differential
input pairs, that will accept either singl e ended or
differential input signals, guarantee high noise immunity making the device suitable for both car radio and car boosters applications.
The audio mute control, t hat attenuates the output signal of the audio amplifiers, suppresses pop
on - off transients and cuts any noises coming
from previous stages. The St-By control, that debiases the amplifiers, reduces the cost of the
power switch. The on-board programmable distortion detector allows compression facility whenever the ampifier is overdriven, so limiting the distortion at any levels inside the presettable range.
TDA7376B
PIN CONNECTION (Continued)
May 2000
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
1/9
TDA7376B
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
SymbolParameterValueUnit
V
OP
V
S
V
peak
I
O
P
tot
T
stg, Tj
Operating Supply Voltage18V
DC Supply Voltage28V
Peak Supply Voltage (t = 50ms)50V
Output Peak Current (non rep. t = 100µs)
Output Peak Current (rep. f > 10Hz)
Power Dissipation at T
= 85°C36W
case
8
6
Storage and Junction Temperature–40 to 150
THERMAL DATA
SymbolParameterValueUnit
Thermal Resistance Junction-case max.1.8
2/9
R
th j-case
°
C/W
°
A
A
C
Figure 1: Differential Inputs Test and Application Circuit
1µF
TDA7376B
Figure 2: Single Ended Inputs Test and Application Circuit
1µF
3/9
TDA7376B
Figure 3: Application Board Reference Circuit
1µF
Figure 4: P.C. Board and Components Layout of the Circuit of Fig. 3 (1:1 scale)
4/9
TDA7376B
ELECTRICAL CHARACTERISTICS (Refer to the test fig. 1 and 2 circuit, T
f = 1KHz; R
= 4Ω; unless otherwise specified.)
L
= 25°C; VS = 14.4V;
amb
SymbolParameterTest ConditionMin.Typ.Max.Unit
V
S
I
d
V
OS
P
O
P
O max
P
O EIAJ
THDDistortionP
C
T
R
IN
G
V
G
∆
E
N
SVRSupply Voltage Rejectionf = 100Hz; Vr = 1Vrms;
Supply Voltage818V
Total Quiescent Drain CurrentRL =
∞
Output Offset Voltage120mV
Output PowerTHD = 10%
THD = 10%, R
23
2
Ω
L
33
25
37
Max. Output Power (*)VS = 14.4V3640W
EIAJ Output Power (*)VS = 13.7V3235W
(*) Saturated square wave output
(**) see figure 5 for THD setting.
Stand-by AttenuationVSB = 1.5V; P
= 1W8090dB
Oref
Stand-by in Threshold1.5V
Stand-by out Threshold3.5V
Stand-by Current Consumption100
Mute AttenuationVM = 1.5V; P
= 1W85dB
Oref
Mute in Threshold1.5V
Mute out Threshold3.5V
Mute pin CurrentV6 = 0 to VS, ; V
= 18V100
S max.
Distortion Detection Level (**)3.5%
Distortion Detector Output DC
Current
Output low, sinked current
(V
= 1.5V)
pin10
Output high, leakage current
(V
= VS, @ V
pin10
Smax
= 18V)
1mA
10
W
W
%
%
dB
dB
K
Ω
K
Ω
dB
dB
V
µ
V
µ
dB
dB
A
µ
A
µ
A
µ
The TDA7376B is equipped with a programmable
clipping distortion detector circuitry t hat allows to
signal out the output stage saturation by providing
a current sinking into an open collector output
(DDout) when the total harmonic distortion of the
output signal reaches the preset level. The desired threshold is fixed through an external divider
that produces a proper voltage level across the
THD set pin. Fig. 5 shows the THD detection
threshold versus the THD set voltage. Since it is
essential that the THD set voltage be proportional
to the supply voltage, fig. 5 shows its value as a
fraction of V
. The actual voltage can be com-
CC
puted by multiplying the fraction corresponding to
the desired THD threshold by the application’s
supply voltage.
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of use of such i nformation nor for any i nfringement of patents or ot her rights of third par ties which may result from its use. No license i s
granted by impli cation or otherwis e under any patent or patent righ ts of STMicroelect ronics. Specifica tion mentioned in this publication are
subject to change without notic e. This public ation supers edes and replaces all information prev iously supplied. STMic roelec tronic s 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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