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TDA7376B中文资料

TDA7376B

2x 35W POWER AMPLIFIER FOR CAR RADIO

HIGH OUTPUT POWER CAPABILITY:2x 40W max./4?2x 35W/4?EIAJ

2x 25W4?@14.4V,1KHz,10%DIFFERENTIAL INPUTS

MINIMUM EXTERNAL COMPONENT COUNT INTERNALLY FIXED GAIN (26dB)

MUTE FUNCTION (CMOS COMPATIBLE)AUTOMUTE AT MINIMUM SUPPLY VOLT-AGE DETECTION

STAND-BY FUNCTION

NO AUDIBLE POP DURING MUTE AND ST-BY OPERATIONS

CLIPPING DETECTOR WITH PROGRAMMA-BLE 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 TDA7376B is a new technology dual bridge Audio Amplifier in Multiwatt 15package designed for car radio applications.Thanks to the fully com-plementary PNP/NPN output stage configuration the TDA7376B delivers a rail-to-rail voltage swing with no need of bootstrap capacitors.Differential input pairs,that will accept either single ended or differential input signals,guarantee high noise im-munity making the device suitable for both car ra-dio and car boosters applications.

The audio mute control,that attenuates the out-put 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 amplifiers,reduces the cost of the power switch.The on-board programmable distor-tion detector allows compression facility when-ever the ampifier is overdriven,so limiting the dis-tortion at any levels inside the presettable range.

This is advanced information on a new product now in development or undergoing evaluation.Details are subject to change without notice.

September 1998?

PIN CONNECTION (Continued)

MULTIWATT15

ORDERING NUMBER:TDA7376B

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ABSOLUTE MAXIMUM RATINGS

Symbol Parameter

Value Unit V OP Operating Supply Voltage 18V V S DC Supply Voltage

28V V peak Peak Supply Voltage (t =50ms)

50V I O Output Peak Current (non rep.t =100μs)Output Peak Current (rep.f >10Hz) 4.53.5A A P tot Power Dissipation at T case =85°C 36W T stg,T j

Storage and Junction Temperature

–40to 150

°C

THERMAL DATA

Symbol Parameter

Value Unit R th j-case Thermal Resistance Junction-case

max.

1.8

°C/W

BLOCK DIAGRAM

TDA7376B

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TDA7376B Figure1:Differential Inputs Test and Application Circuit

1μF

Figure2:Single Ended Inputs Test and Application Circuit

1μF

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TDA7376B

Figure3:Application Board Reference Circuit

1μF

Figure4:P.C.Board and Components Layout of the Circuit of Fig.3(1:1scale) 4/9

ELECTRICAL CHARACTERISTICS(Refer to the test fig.1and2circuit,T amb=25°C;V S=14.4V;

f=1KHz;R L=4?;unless otherwise specified.)

Symbol Parameter Test Condition Min.Typ.Max.Unit V S Supply Voltage818V

I d Total Quiescent Drain Current R L=∞200mA

V OS Output Offset Voltage120mV P O Output Power THD=10%2325W P O max Max.Output Power(*)VS=14.4V3640W P O EIAJ EIAJ Output Power(*)V S=13.7V3235W THD Distortion P O=0.5to10W0.030.3%

C T Cross Talk f=1KHz;Rg=0

f=10KHz;Rg=080

R IN Input Resistance differential input

single ended input 45

G V Voltage Gain differential input

single ended input 25

?G V Channel Gain Balance1dB

E N Input Noise Voltage Rg=600?;”A Weighted”

Rg=600?;22Hz to22KHz 3

μV

SVR Supply Voltage Rejection f=100Hz;Vr=1Vrms;

Rg=0

f=10KHz;Vr=1Vrms;

Rg=045

BW Power Bandwidth(–3dB)75KHz CMRR Common Mode Rejection Ratio V CM=1Vrms input referred60dB A SB Stand-by Attenuation V SB=1.5V;P Oref=1W8090dB V sb IN Stand-by in Threshold 1.5V V sb OUT Stand-by out Threshold 3.5V

I sb Stand-by Current Consumption100μA A M Mute Attenuation V M=1.5V;P Oref=1W85dB V M IN Mute in Threshold 1.5V V M OUT Mute out Threshold 3.5V I6Mute pin Current V6=0to V S,;V S max.=18V100μA D DL Distortion Detection Level(**) 3.5%

D DOUT Distortion Detector Output DC

Current Output low,sinked current

(V pin10=1.5V)

1mA

Output high,leakage current

(V pin10=V S,@V Smax=18V)

10μA

(*)Saturated square wave output (**)see figure5for THD setting.

The TDA7376B is equipped with a programmable clipping distortion detector circuitry that 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 de-sired threshold is fixed through an external divider that produces a proper voltage level across the THD set pin.Fig.5shows 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.5shows its value as a fraction of V CC.The actual voltage can be com-puted by multiplying the fraction corresponding to the desired THD threshold by the application’s supply voltage.

TDA7376B

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Figure 5:Clip Detector Threshold vs.THD set.

Voltage.

Figure 7:Quiescent Current vs.Temperature Figure 9:Ouput Power vs.Supply Voltage Figure 6:Quiescent Current vs.Supply Voltage

Figure 8:Ouput Power vs.Supply Voltage

Figure 10:EIAJ Power vs.Supply Voltage

V S =14.4V R L =4?f =1KHz

R L =4?

R L =4?V i =0

R L =4?

R L =3.2?

f =1KHz THD =1%

R L =4?

R L =3.2?

f =1KHz V i =2.5Vrms

f =1KHz THD =10%

R L =4?

R L =3.2?

TDA7376B

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Figure 11:THD vs.Frequency

Figure 15:CMRR vs.Frequency

Figure 12:THD vs.Output Power

Figure 14:SVR vs.Frequency

Figure 16:Crosstalk vs.Frequency

Figure 13:Dissipated Power &Efficiency vs.Out-put Power

V S =14.4V R L =4?P O =12W

V S =14.4V R L =4?

f (Hz)

V S =14.4V R L =4?f =1KHz

f (Hz)

V S =14.4V R L =4?V r =1Vrms

V S =14.4V R L =4?V i =1Vrms

R i =0R i =600?

V S =14.4V R L =4?P O =1W R L =0

f (Hz)

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Multiwatt15V

DIM.mm

inch MIN.

TYP.

MAX.MIN.

TYP.

MAX.A 50.197 B 2.650.104C 1.6

0.063

D 1

0.039

E 0.490.550.0190.022

F 0.660.750.0260.030

G 1.02 1.27 1.520.0400.0500.060G117.5317.7818.03

0.6900.700

0.710

H119.6

0.772

H220.2

0.795L 21.922.222.50.8620.8740.886L121.722.1

22.50.8540.870

0.886 L217.6518.10.6950.713 L317.2517.517.750.6790.6890.699L410.310.710.90.4060.4210.429L7 2.65 2.90.1040.114M 4.25 4.55 4.850.1670.1790.191M1 4.63 5.08 5.530.1820.2000.218S 1.9 2.60.0750.102S1 1.9 2.60.0750.102Dia1

3.65

3.85

0.144

0.152

OUTLINE AND MECHANICAL DATA

TDA7376B

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TDA7376B

Information furnished is believed to be accurate and reliable.However,STMicroelectronics assumes no responsibility for the consequences 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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