Salida De Stereo

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TDA7381
4 x 25W QUAD BRIDGE CAR RADIO AMPLIFIER
PRELIMINARY DATA

HIGH OUTPUT POWER CAPABILITY: 4 x 30W/4Ω MAX. 4 x 25W/4Ω EIAJ 4 x 18W/4Ω @ 14.4V, 1KHz, 10% 4 x 15W/4Ω @ 13.2V, 1KHz, 10% CLIPPING DETECTOR LOW DISTORTION LOW OUTPUT NOISE ST-BY FUNCTION MUTE FUNCTION AUTOMUTE AT MIN. SUPPLY VOLTAGE DETECTION DIAGNOSTICS FACILITY FOR: – CLIPPING – OUT TO GND SHORT – OUT TO VS SHORT – THERMAL SHUTDOWN LOW EXTERNAL COMPONENT COUNT: – INTERNALLY FIXED GAIN (26dB) – NO EXTERNAL COMPENSATION – NO BOOTSTRAP CAPACITORS Protections: OUTPUT SHORT CIRCUIT TO GND, TO VS, BLOCK AND APPLICATION DIAGRAM
Vcc1

Flexiwatt25

ACROSS THE LOAD VERY INDUCTIVE LOADS OVERRATING CHIP TEMPERATURE WITH SOFT THERMAL LIMITER LOAD DUMP VOLTAGE FORTUITOUS OPEN GND REVERSED BATTERY ESDPROTECTION DESCRIPTION The TDA7381 is a new technology class AB Audio Power Amplifier in Flexiwatt 25 package designed for car radio applications.

Vcc2 2.200µF 100nF

ST-BY DIAGN. OUT MUTE OUT1+ IN1 0.1µF OUT1PW-GND OUT2+ IN2 0.1µF OUT2PW-GND OUT3+ IN3 0.1µF OUT3PW-GND OUT4+ IN4 0.1µF AC-GND 0.1µF SVR 47µF TAB S-GND OUT4PW-GND

D93AU002C

October 1999
This is preliminary information on a newproduct now in development. Details are subject to change without notice.

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TDA7381
DESCRIPTION (continued) Thanks to the fully complementary PNP/NPN output configuration the 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 VCC VCC (DC) VCC (pk) IOOperating Supply Voltage DC Supply Voltage Peak Supply Voltage (t = 50ms) Output Peak Current: Repetitive (Duty Cycle 10% at f = 10Hz) Non Repetitive (t = 100µs) Power dissipation, (Tcase = 70°C) Junction Temperature Storage Temperature Parameter Value 18 28 50 3 4 80 150 – 40 to 150 Unit V V V A A W °C °C

The on-board clipping detector simplifies gain compression operations. The faultdiagnostics makes it possible to detect mistakes during CarRadio assembly and wiring in the car.

Ptot Tj Tstg

PIN CONNECTION (Top view)

1

25

D94AU117B

THERMAL DATA
Symbol Rth j-case Parameter Thermal Resistance Junction to Case Max. Value 1 Unit °C/W

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DIAGNOSTICS

AC-GND

P-GND4

P-GND1

P-GND3

P-GND

S-GND

SVR

OUT2+

OUT1+

OUT3+

OUT4+

ST-BY

MUTEVCC

VCC

OUT4-

OUT2-

OUT1-

OUT3-

IN1

IN2

IN4

TAB

IN3

TDA7381
ELECTRICAL CHARACTERISTICS (VS = 14.4V; f = 1KHz; Rg = 600Ω; RL = 4Ω; Tamb = 25°C; Refer to the Test and application circuit (fig.1), unless otherwise specified.)
Symbol Iq1 VOS Gv Po Parameter Quiescent Current Output Offset Voltage Voltage Gain Output Power THD = 10% THD = 1% THD = 10%; VS = 13.2VTHD = 1%; VS = 13.2V Po EIAJ Po max THD eNo SVR fcl fch Ri CT ISB VSB out VSB IN AM VM out VM in Im (L) ICDOFF ICDON EIAJ Output Power (*) Max.Output Power (*) Distortion Output Noise Supply Voltage Rejection Low Cut-Off Frequency High Cut-Off Frequency Input Impedance Cross Talk St-By Current Consumption St-By OUT Threshold Voltage St-By IN Threshold Voltage Mute Attenuation Mute OUT ThresholdVoltage Mute IN Threshold Voltage Muting Pin Current Clipping Detector ”OFF” Output Average Current Clipping Detector ”ON” Output Average Current f = 1KHz St-By = LOW (Amp: ON) (Amp: OFF) VO = 1Vrms (Amp: Play) (Amp: Mute) VMUTE = 1.5V (Source Current) THD = 1% (**) THD = 10% (**) 100 5 10 100 240 350 80 3.5 1.5 16 90 3.5 1.5 75 70 50 100 70 100 EIAJ (VS = 13.7V) VS = 13.7V Po = 4W ”A” Weighted Bw= 20Hz to 20KHz f = 100Hz 50 25 16.5 13 13.5 11 23 28 26 18 14 15 12 25 30 0.04 50 65 65 20 0.3 150 Test Condition Min. Typ. 180 Max. 300 100 27 Unit mA mV dB W W W W W W % µV µV dB Hz KHz KΩ dB µA V V dB V V µA µA µA

(*) Saturated square wave output. (**) Diagnostics output pulled-up to 5V with 10KΩ series resistor.

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TDA7381
Figure 1: Standard Test and Application Circuit

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