SGS Thomson Microelectronics TDA7451 Datasheet
TDA7451
4x7W OR 2x22W CAR RADIO POWER AMPLIFIER PLUS
TRIPLE POWER SUPPLY
PRELIMINARY DATA
HIGHOUTPUTPOWERCAPABILITY:
4 x9.5WOR2 x 32W/4Ω MAX
4 x 8.5W OR 2 x 28W/4ΩEIAJ
4 x 7W OR 2 x 22W/4Ω@14.4V,1KHz; 10%
MINIMIZEDEXTERNAL COUNT
- NO NEED OF DECOUPLING CAPACITORS
- NO NEED OF BOOTSTRAPCAPACITOR
- NO NEED OF EXTERNAL COMPENSATION
- INTERNALLYFIXED GAIN (20dB)
POP-FREEAUDIO SECTION
ST-BYFUNCTION (C-MOS)
MUTEFUNCTION (C-MOS)
CLIP DETECTOR, THERMAL WARNING,
SHORTCIRCUIT DETECTION
BUILT-INVOLTAGE REGULATORS:
- 5V @ 150mAWITH RESET
- 5V @ 500mAWITH ST-BY
- 8.5V@ 200mAWITH ST-BY
REGULATORSDIAGNOSTIC FEATURE: UN-
DERVOLTAGE, 8.5V DROP SENSE, SHORT
CIRCUIT, LOAD DUMP, OVER-TEMPERA-
ORDERING NUMBER: TDA7451
TURE
PROTECTIONS
General:
LOADDUMP
OVERRATINGCHIP TEMPERATURE
AudioSection:
OUT SHORT (TO GND, TO Vs AND
ACROSSTHE LOAD)
Power SupplySection:
SHORT CIRCUIT PROTECTION (OUT TO
GND)
Flexiwatt25
BLOCK DIAGRAM
MUTE
ST-BY
8.5V
5V
5V
RESET
DIAG
10KΩ
10µF
10KΩ
1µF
10µF
10µF
10µF
22K 22K
47µF
22
8
V
2
V
V
SVR
O3
O2
O1
200mA
REG.
3
500mA
REG.
4
150mA
REG.
9
7
DIAG
10 5 15 14
STCAP
470µF
IN RF
IN RR
0.1µF 0.1µF
V
12
11
0.1µF 0.1µF
IN LRIN LF
CC1
CC2
620
+
-
+
-
16 13
DDL S-GND
18,24
23
21
25
17
1
19
0.1µF
+
-+
HVCChvcc
+
TAB
-+
PW-GND
D95AU311C
RF
RR
LF
LR
V
CC
1000µFV
-
-
October 1999
This is preliminary information on a new product now in developmentor undergoing evaluation.Details are subject to change without notice.
1/9
TDA7451
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
S
V
S
V
S
I
o
I
o
P
tot
T
stg,Tj
V
out
V
in
RESR Output capacitor series resistance 0.2 to 10
PIN CONNECTION
Operating Supply Voltage 18 V
DC Supply Voltage 28 V
Peak Supply Voltage (t = 50ms) 40 V
Audio OutputPeak Current (non repetitive t = 100µs) 4 A
Audio OutputPeak Current (repetitive f > 10Hz) 3 A
Voltage Regulators Output Current internally limited
Power Dissipation at T
=85°C55W
case
Storage and Junction Temperature Range -40 to 150
Output Voltages (DIAG, RESET) 7 V
Input Voltages(ST-BY, MUTE) 18 V
C
°
Ω
1 25
TAB
REG3
REG2
REG1
VCC1
ST-CAP
DIAG
ST-BY
SVR
RESET
IN-RF
IN-RR
SGND
IN-LR
IN-LF
DDL
OUT-LF
PWGND
VCC2
OUT-LR
MUTE
OUT-RR
D95AU315
OUT-RF
PWGND
HVCC
THERMAL DATA
Symbol Parameter Unit
Thermal ResistanceJunction-case 1.2 °C/W
2/9
R
th j-case
PO= 4 X 7W S.E. APPLICATION
MUTE
ST-BY
8.5V
RESET
DIAG
10KΩ
10µF
10KΩ
1µF
10µF
5V
10µF
5V
10µF
22K 22K
V
V
V
SVR
47µF
22
8
2
O3
3
O2
4
O1
9
7
10 5 15 14
STCAP
470µF
IN RF
IN RR
0.1µF 0.1µF
V
12
11
0.1µF 0.1µF
IN LRIN LF
CC1
CC2
620
16 13
DDL S-GND
18,24
23
21
25
17
1
19
0.1µF
+
-+
HVCC
+
TAB
-+
PW-GND
D96AU514
RF
RR
LF
LR
TDA7451
V
CC
1000µFV
-
-
PO= 2 X 22W BTL APPLICATION
MUTE
ST-BY
8.5V
5V
5V
RESET
DIAG
10KΩ
10µF
10KΩ
1µF
10µF
10µF
10µF
22K 22K
47µF
V
V
V
SVR
O3
O2
O1
8
2
3
4
9
7
10
IN R
0.22µF
1222
11 6 20
5 1514 1613
STCAP
470µF
0.22µF
DDL S-GND
IN L
V
CC
V
V
CC1
CC2
0.1µF
23
1000µF
+
OUT R
21
-
25
18,24
17
TAB
1
19
PW-GND
D96AU515
+
OUT L
-
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