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TDA7381 데이터시트 PDF




ST Microelectronics에서 제조한 전자 부품 TDA7381은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

PDF 형식의 TDA7381 자료 제공

부품번호 TDA7381 기능
기능 4 x 25W QUAD BRIDGE CAR RADIO AMPLIFIER
제조업체 ST Microelectronics
로고 ST Microelectronics 로고


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TDA7381 데이터시트, 핀배열, 회로
® TDA7381
4 x 25W QUAD BRIDGE CAR RADIO AMPLIFIER
PRELIMINARY DATA
HIGH OUTPUT POWER CAPABILITY:
4 x 30W/4MAX.
4 x 25W/4EIAJ
4 x 18W/4@ 14.4V, 1KHz, 10%
4 x 15W/4@ 13.2V, 1KHz, 10%
CLIPPING DETECTOR
LOW DISTORTION
LOW OUTPUT NOISE
ST-BY FUNCTION
MUTE FUNCTION
AUTOMUTE AT MIN. SUPPLY VOLTAGE DE-
TECTION
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,
Flexiwatt25
ACROSS THE LOAD
VERY INDUCTIVE LOADS
OVERRATING CHIP TEMPERATURE WITH
SOFT THERMAL LIMITER
LOAD DUMP VOLTAGE
FORTUITOUS OPEN GND
REVERSED BATTERY
ESD PROTECTION
DESCRIPTION
The TDA7381 is a new technology class AB
Audio Power Amplifier in Flexiwatt 25 package
designed for car radio applications.
BLOCK AND APPLICATION DIAGRAM
ST-BY
MUTE
IN1
0.1µF
Vcc1
IN2
0.1µF
IN3
0.1µF
IN4
0.1µF
AC-GND
0.1µF
SVR
47µF
Vcc2
TAB S-GND
2.200µF
100nF
DIAGN. OUT
OUT1+
OUT1-
PW-GND
OUT2+
OUT2-
PW-GND
OUT3+
OUT3-
PW-GND
OUT4+
OUT4-
PW-GND
D93AU002C
October 1999
This is preliminary information on a new product now in development. Details are subject to change without notice.
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TDA7381 pdf, 반도체, 판매, 대치품
TDA7381
Figure 1: Standard Test and Application Circuit
ST-BY
MUTE
IN1
R1
10K
R2
47K
C1
0.1µF
IN2
C2 0.1µF
IN3
C3 0.1µF
IN4
C4 0.1µF
C8
0.1µF
4
C9
1µF
22
C10
1µF
11
C7
2200µF
Vcc1-2 Vcc3-4
6 20
9
8
7
5
2
3
12 17
18
19
15
S-GND
14
13
16
C5
0.1µF
21
24
23
10
SVR
C6
47µF
25
1
TAB
DIAGNOSTICS
OUT1
OUT2
OUT3
OUT4
D94AU179B
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TDA7381 전자부품, 판매, 대치품
TDA7381
OUTPUT MISCONNECTIONS (OUT-GND &
OUT-Vs shorts)
Diagnostics information is available across an
open collector output located at pin 25 (fig. 4)
through a current sinking whenever at least one
of the above events is recognized.
Among them, the CLIPPING DETECTOR acts in
a way to output a signal as soon as one or more
power transistors start being saturated.
As a result, the clipping-related signal at pin 25
Figure 4: Diagnostics circuit.
Figure 5: Clipping Detection Waveforms.
25 R
Vpin 25
VREF
TTDDAA77338815
D95AU303
Figure 6: Diagnostics Waveforms.
ST-BY PIN
VOLTAGE
MUTE PIN
VOLTAGE
Vs
OUTPUT
WAVEFORM
takes the form of pulses, which are perfectly syn-
cronized with each single clipping event in the
music program and reflect the same duration time
(fig. 5). 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.
The maximum load that pin 25 can sustain is
1K.
Due to its operating principles, the clipping detec-
t
t
t
Vpin 25
WAVEFORM
D95AU304
CLIPPING
SHORT TO GND THERMAL
OR TO Vs
PROXIMITY
t
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