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TDA7376PDSTMN/a806avai2 x 35W POWER AMPLIFIER FOR CAR RADIO


TDA7376PD ,2 x 35W POWER AMPLIFIER FOR CAR RADIOTDA7376PD2 X 35W POWER AMPLIFIER FOR CAR RADIO■ HIGH OUTPUT POWER CAPABILITY2 x 40W max./4Ω 2 x 35W ..
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TDA7376PD
2 x 35W POWER AMPLIFIER FOR CAR RADIO
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TDA7376PD

April 2004 HIGH OUTPUT POWER CAPABILITY
2 x 40W max./4Ω
2 x 35W/4Ω EIAJ
2 x 25W/4Ω @14.4V, 1KHz, 10%
2 x 25W/2Ω @14.4V, 1KHz, 10% 2Ω DRIVING DIFFERENTIAL INPUTS MINIMUM EXTERNAL COMPONENTS
COUNT INTERNALLY FIXED GAIN (26dB) MUTE FUNCTION (CMOS COMPATIBLE) AUTOMUTE AT MINIMUM SUPPLY VOLTAGE
DETECTION STAND-BY FUNCTION NO AUDIBLE POP DURING MUTE AND SY-
BY OPERATIONS CLIPPING DETECTOR WITH
PROGRAMMABLE DISTORTION
THRESHOLD
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 CURRENT ESD
DESCRIPTION

The TDA7376PD is a new technology dual bridge
Audio Amplifier in PowerSO36 package designed
for car radio applications. Thanks to the fully com-
plementary PNP/NPN output stage configuration
the TDA7376PD delivers a rail-to-rail voltage
swing with no need of bootstrap capacitors.
2 X 35W POWER AMPLIFIER FOR CAR RADIO
BLOCK DIAGRAM
TDA7376PD
DESCRIPTION (Continued)

Differential input pairs, that will accept either single 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, that 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 de-biases the ampli-
fiers, reduces the cost of the power switch. The on-board programmable distortion detector allows com-
pression facility whenever the ampifier is overdriven, so limiting the distortion at any levels inside the
presettable range.
PIN CONNECTION (Top view)
ABSOLUTE MAXIMUM RATINGS
THERMAL DATA
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TDA7376PD
Figure 1. Differential Inputs Test and Application Circuit
Figure 2. Single Ended Inputs Test and Application Circuit
TDA7376PD
Figure 3. Application Board Reference Circuit
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TDA7376PD
ELECTRICAL CHARACTERISTCS (Refer to the test circuits figgs 1 and 2, VS = 14.4V; RL = 4Ω; f = 1KHz;

Tamb = 25°C, unless otherwise specified).
(*) Saturated square wave output
(**) see figure 5 for THD setting.
The TDA7376PD is equipped with a programmable clipping distortion detector circuitry that allows to sig-
nal 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. 4 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 VCC. The actual voltage can be
computed by multiplying the fraction corresponding to the desired THD threshold by the application’s sup-
ply voltage.
TDA7376PD
Figure 4. Clip Detector Threshold vs. THD set.
Voltage.
Figure 5. Quiescent Current vs. Supply Voltage
Figure 6. Ouput Power vs. Supply Voltage
Figure 7. Ouput Power vs. Supply Voltage
Figure 8. EIAJ Power vs. Supply Voltage
Figure 9. THD vs. Frequency
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