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ST Microelectronics - 4x7W OR 2x22W CAR RADIO POWER AMPLIFIER PLUS TRIPLE POWER SUPPLY

Numéro de référence TDA7451
Description 4x7W OR 2x22W CAR RADIO POWER AMPLIFIER PLUS TRIPLE POWER SUPPLY
Fabricant ST Microelectronics 
Logo ST Microelectronics 





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TDA7451 fiche technique
® TDA7451
4x7W OR 2x22W CAR RADIO POWER AMPLIFIER PLUS
TRIPLE POWER SUPPLY
HIGH OUTPUT POWER CAPABILITY:
4 x 9.5W OR 2 x 32W/4MAX
4 x 8.5W OR 2 x 28W/4EIAJ
4 x 7W OR 2 x 22W/4@14.4V, 1KHz; 10%
MINIMIZED EXTERNAL COUNT
- NO NEED OF DECOUPLING CAPACITORS
- NO NEED OF BOOTSTRAP CAPACITOR
- NO NEED OF EXTERNAL COMPENSATION
- INTERNALLY FIXED GAIN (20dB)
POP-FREE AUDIO SECTION
ST-BY FUNCTION (C-MOS)
MUTE FUNCTION (C-MOS)
CLIP DETECTOR, THERMAL WARNING,
SHORT CIRCUIT DETECTION
BUILT-IN VOLTAGE REGULATORS:
- 5V @ 150mA WITH RESET
- 5V @ 500mA WITH ST-BY
- 8.5V @ 200mA WITH ST-BY
REGULATORS DIAGNOSTIC FEATURE: UN-
DERVOLTAGE, 8.5V DROP SENSE, SHORT
CIRCUIT, LOAD DUMP, OVER-TEMPERA-
PRELIMINARY DATA
Flexiwatt25
ORDERING NUMBER: TDA7451
TURE
PROTECTIONS
General:
LOAD DUMP
OVERRATING CHIP TEMPERATURE
Audio Section:
OUT SHORT (TO GND, TO Vs
ACROSS THE LOAD)
AND
Power Supply Section:
SHORT CIRCUIT PROTECTION (OUT TO
GND)
BLOCK DIAGRAM
MUTE
ST-BY
10K
10µF
10K
1µF
8.5V
10µF
5V
10µF
5V
22K
10µF
RESET
DIAG
IN RR IN RF
VO3
VO2
VO1
22K
SVR
47µF
22
8
2 200mA
REG.
3 500mA
REG.
4
150mA
REG.
9
7 DIAG
10
STCAP
470µF
5
0.1µF
0.1µF
VCC1
VCC2
12 11
6 20
23
+
0.1µF
VCC
1000µF
+-
RF
21 - +
-
hvcc
RR
25 HVCC
LF
17
+
+-
15 14
TAB
1
LR
19
-
-+
PW-GND
18,24
16 13
0.1µF
DDL S-GND
0.1µF
IN LF IN LR
D95AU311C
October 1999
1/9
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

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