E-TDA7382 [STMICROELECTRONICS]

22W, 4 CHANNEL, AUDIO AMPLIFIER, ZFM25, FLEXIWATT-25;


型号：	E-TDA7382
厂家：	ST
描述：	22W, 4 CHANNEL, AUDIO AMPLIFIER, ZFM25, FLEXIWATT-25 局域网放大器商用集成电路
文件：	总10页 (文件大小：630K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

TDA7382

4 x 22W FOUR BRIDGE CHANNELS CAR RADIO AMPLIFIER

HIGH OUTPUT POWER CAPABILITY:

4 x 30W max./4Ω EIAJ

4 x 22W/4Ω @ 14.4V, 1KHz, 10%

4 x 18.5W/4Ω @ 13.2V, 1KHz, 10%

CLIPPING DETECTOR (THD = 10%)

LOW DISTORTION

LOW OUTPUT NOISE

ST-BY FUNCTION

FLEXIWATT25

MUTE FUNCTION

ORDERING NUMBER: TDA7382

AUTOMUTE AT MIN. SUPPLY VOLTAGE DE-

TECTION

LOW EXTERNAL COMPONENT COUNT:

– INTERNALLY FIXED GAIN (26dB)

– NO EXTERNAL COMPENSATION

– NO BOOTSTRAP CAPACITORS

REVERSED BATTERY

ESD PROTECTION

DESCRIPTION

The TDA7382 is a new technology class AB

Audio Power Amplifier in Flexiwatt 25 package

designed for high end car radio applications.

Thanks to the fully complementary PNP/NPN out-

put configuration the TDA7382 allows a rail to rail

output voltage swing with no need of bootstrap

capacitors. The extremely reduced components

count allows very compact sets. The on-board

clipping detector simplifies gain compression op-

erations.

PROTECTIONS:

OUTPUT SHORT CIRCUIT TO GND, TO V_S,

ACROSS THE LOAD

VERY INDUCTIVE LOADS

OVERRATING CHIP TEMPERATURE WITH

SOFT THERMAL LIMITER

LOAD DUMP VOLTAGE

FORTUITOUS OPEN GND

BLOCK AND APPLICATION DIAGRAM

Vcc1

Vcc2

2.200µF

100nF

ST-BY

MUTE

CLIPPING DET.

OUT1+

OUT1-

IN1

0.1µF

PW-GND

OUT2+

OUT2-

IN2

0.1µF

PW-GND

OUT3+

OUT3-

IN3

0.1µF

PW-GND

OUT4+

OUT4-

IN4

0.1µF

PW-GND

AC-GND

SVR

47µF

TAB

S-GND

0.1µF

D98AU818

1/10

March 2001

TDA7382

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

V_CC

V_{CC (DC)}

V_{CC (pk)}

I_O

Operating Supply Voltage

DC Supply Voltage

Peak Supply Voltage (t = 50ms)

Output Peak Current:

Repetitive (Duty Cycle 10% at f = 10Hz)

Non Repetitive (t = 100µs)

4.5

5.5

P_tot

T_j

Power dissipation, (T_case= 70°C)

Junction Temperature

150

°C

T_stg

Storage Temperature

– 55 to 150

PIN CONNECTION (Top view)

D98AU820

THERMAL DATA

Symbol

Parameter

Thermal Resistance Junction to Case

Value

Unit

R_{th j-case}

Max.

°C/W

2/10

TDA7382

Ω

ELECTRICAL CHARACTERISTICS (V_S= 14.4V; f = 1KHz; R_g= 600 ; R_L= 4 ; T_amb= 25 C;

Refer to the Test and application circuit (fig.1), unless otherwise specified.)

Symbol

I_q1

Parameter

Quiescent Current

Test Condition

Min.

Typ.

Max.

Unit

180

300

100

V_OS

G_v

Output Offset Voltage

Voltage Gain

P_o

Output Power

THD = 10%

THD = 1%

16.5

THD = 10%; V_S= 13.5V

THD = 10%; V_S= 14V

THD = 5%; V_S= 14V

THD = 1%; V_S= 14V

THD = 10%; V_S= 13.2V

THD = 1%; V_S= 13.2V

18.5

P_{o max}

THD

e_No

Max. Output Power

Distortion

EIAJ RULES

P_o= 4W

27.5

0.04

0.3

Output Noise

"A" Weighted

Bw = 20Hz to 20KHz

120

150

µV

SVR

f_cl

Supply Voltage Rejection

Low Cut-Off Frequency

High Cut-Off Frequency

Input Impedance

f = 100Hz

KHz

KΩ

µA

f_ch

R_i

100

130

C_T

Cross Talk

f = 1KHz

I_SB

St-By Current Consumption

St-By OUT Threshold Voltage

St-By IN Threshold Voltage

Mute Attenuation

St-By = LOW

(Amp: ON)

(Amp: OFF)

V_O= 1Vrms

(Amp: Play)

(Amp: Mute)

V_{SB out}

V_{SB IN}

A_M

3.5

1.5

V_{M out}

V_{M in}

I_{m (L)}

Mute OUT Threshold Voltage

Mute IN Threshold Voltage

Muting Pin Current

3.5

1.5

V_MUTE= 1.5V

(Source Current)

µA

CDL

Clipping Detection THD Level

3/10

TDA7382

Figure 1: Standard Test and Application Circuit

0.1µF

2200µF

Vcc1-2

Vcc3-4

10K

ST-BY

MUTE

1µF

OUT1

OUT2

OUT3

OUT4

47K

C10

1µF

IN1

IN2

IN3

IN4

0.1µF

C2 0.1µF

C3 0.1µF

C4 0.1µF

S-GND

SVR

TAB

0.1µF

D98AU819

47µF

CLIPPING DET.

4/10

TDA7382

Figure 2: P.C.B. and component layout of the figure 1 (1:1 scale)

COMPONENTS &

TDA7382

TOP COPPER LAYER

BOTTOM COPPER LAYER

5/10

TDA7382

Figure 3: Quiescent Current vs. Supply Voltage

Figure 4: Quiescent Output Voltage vs. Supply

Voltage

Figure 5: Output Power vs. Supply Voltage

Figure 6: Distortion vs. Output Power

Figure 8: Supply

Voltage

Frequency by varying C6

Rejection

vs.

Figure 7: Distortion vs. Frequency.

R_g= 600Ω

_ripple= 1Vrms

6/10

TDA7382

Figure 9: Output Noise vs. Source Resistance

Figure 10: Power Dissipation & Efficiency vs.

Output Power

P_tot(W)

P_tot

R_g(Ω)

absence of true CMOS ports or microprocessors.

INPUT STAGE

R-C cells have always to be used in order to

smooth down the transitions for preventing any

audible transient noises.

The TDA7382’S inputs are ground-compatible

and can stand very high input signals ( 8Vpk)

without any performances degradation.

Since a DC current of about 10 uA normally flows

out of pin 22, the maximum allowable muting-se-

If the standard value for the input capacitors

(0.1 F) is adopted, the low frequency cut-off will

Ω

ries resistance (R₂) is 70K , which is sufficiently

amount to 16 Hz.

high to permit a muting capacitor reasonably

small (about 1 F).

STAND-BY AND MUTING

If R₂is higher than recommended, the involved

risk will be that the voltage at pin 22 may rise to

above the 1.5 V threshold voltage and the device

will consequently fail to turn OFF when the mute

line is brought down.

STAND-BY and MUTING facilities are both

CMOS-COMPATIBLE. If unused, a straight con-

nection to Vs of their respective pins would be ad-

missible. Conventional low-power transistors can

be employed to drive muting and stand-by pins in

About the stand-by, the time constant to be as-

Figure 11: Input/Output Biasing.

100KΩ

0.1µF

C1 ÷ C4

8KΩ

400Ω

V_S

8KΩ

10KΩ

70KΩ

100KΩ

SVR

AC_GND

10KΩ

47µF

0.1µF

TOWARDS

OTHER CHANNELS

D95AU302

7/10

TDA7382

signed in order to obtain a virtually pop-free tran-

sition has to be slower than 2.5V/ms.

1KΩ.

Due to its operating principles, the clipping detec-

tor has to be viewed mainly as a power-depend-

ent feature rather than frequency-dependent. This

means that clipping state causing THD = 10%

typ. will be immediately signaled out whenever a

fixed power level is reached, regardless of the

audio frequency.

CLIPPING DETECTOR

The CLIPPING DETECTOR acts in a way to out-

put a signal as soon as one or more outputs

reach or trespass a typical THD level of 10%.

As a result, the clipping-related signal at pin 25

takes the form of pulses, which are syncronized

with each single clipping event in the music pro-

In other words, this feature offers the means to

counteract the extremely sound-damaging effects

of heavy clipping, caused by a sudden increase of

odd order harmonics and appearance of serious

intermodulation phenomena.

gram.

Applications making use of this facility

usually operate a filtering/integration of the pulses

train through passive R-C networks and realize a

volume (or tone bass) stepping down in associa-

tion with microprocessor-driven audioprocessors.

Figure 13: Clipping Detection Waveforms.

The maximum load that pin 25 can sustain is

Figure 12: Diagnostics circuit.

V^O

AUDIO

OUTPUT

SIGNAL

VREF

Vpin 25

ICLIP

CLIPPING

DET.

OUTPUT

CURR.

TDA7382

D97AU810

time

D97AU811

Figure 14: Diagnostics Waveforms.

ST-BY PIN

VOLTAGE

MUTE PIN

VOLTAGE

OUTPUT

WAVEFORM

Vpin 25

WAVEFORM

CLIPPING

D97AU812A

8/10

TDA7382

inch

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

OUTLINE AND

MECHANICAL DATA

4.45

1.80

4.50

1.90

1.40

0.90

0.39

4.65 0.175 0.177 0.183

2.00 0.070 0.074 0.079

0.055

1.05 0.029 0.035 0.041

0.42 0.014 0.015 0.016

0.75

0.37

F (1)

0.57

0.022

0.80

1.00

1.20 0.031 0.040 0.047

23.75 24.00 24.25 0.935 0.945 0.955

H (2) 28.90 29.23 29.30 1.138 1.150 1.153

17.00

12.80

0.80

0.669

0.503

0.031

L (2) 22.07 22.47 22.87 0.869 0.884 0.904

L1 18.57 18.97 19.37 0.731 0.747 0.762

L2 (2) 15.50 15.70 15.90 0.610 0.618 0.626

7.70

7.85

3.5

4.00

2.20

7.95 0.303 0.309 0.313

0.197

0.138

3.70

3.60

4.30 0.145 0.157 0.169

4.40 0.142 0.157 0.173

0.086

0.079

1.70

0.067

0.5

0.3

1.25

0.50

0.02

0.12

0.049

0.019

5˚ (Typ.)

3˚ (Typ.)

20˚ (Typ.)

45˚ (Typ.)

Flexiwatt25

(1): dam-bar protusion not included

(2): molding protusion included

FLEX25ME

9/10

TDA7382

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.

The ST logo is a registered trademark of STMicroelectronics

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10/10

E-TDA7382 [STMICROELECTRONICS]

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