datasheet_tda7451
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TDA7451
4x7W OR 2x22W CAR RADIO POWER AMPLIFIER PLUSTRIPLE POWER SUPPLYPRELIMINARY DATA
HIGH OUTPUT POWER CAPABILITY:4 x 9.5W OR 2 x 32W/4 MAX4 x 8.5W OR 2 x 28W/4 EIAJ4 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 SECTIONST-BY FUNCTION (C-MOS)MUTE FUNCTION (C-MOS)CLIP DETECTOR, THERMAL WARNING,SHORT CIRCUIT DETECTIONBUILT-IN VOLTAGE REGULATORS:- 5V @ 150mA WITH RESET- 5V @ 500mA WITH ST-BY- 8.5V @ 200mA WITH ST-BYREGULATORS DIAGNOSTIC FEATURE: UN-DERVOLTAGE, 8.5V DROP SENSE, SHORTCIRCUIT, LOAD DUMP, OVER-TEMPERA-
TUREPROTECTIONSGeneral:
LOAD DUMPOVERRATING CHIP TEMPERATURE
Audio Section:OUT SHORT (TO GND, TO Vs ANDACROSS THE LOAD)
Power Supply Section:SHORT CIRCUIT PROTECTION (OUT TOGND)
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
October 1999
IN RF
VO3
VCC1
D95AU311C
+
-
+
RESET
10 F
+
-
+
PW-GND
1000 FVCC2 0.1 F
VCC
200mA
REG.
-
- +
RF
RR
-
- +
LF
LR
HVCChvcc
ST-BY
1F
MUTE10K
IN RR
0.1 F 0.1 F
500mA
REG.
8.5V
IN LRIN LF
0.1 F 0.1 F
VO25V
150mA
REG.10 F
VO15V
DIAG
470 F
STCAP
SVR
DDL S-GND
10 F
12228
2
3
4
9
7
10 5 15 14 16 13 18,24
19
17
25
21
23
11 6 20
1TAB
47F
22K 22K
DIAG
10 F
10K
BLOCK DIAGRAM
Flexiwatt25
ORDERING NUMBER: TDA7451
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IN RF
VO3
VCC1
D96AU514
+
RESET
10 F
+
PW-GND
1000 FVCC2 0.1 FVCC
-
- +
RF
RR
-
- +
LF
LR
HVCC
ST-BY
1F
MUTE10 F
IN RR
0.1 F 0.1 F
8.5V
IN LRIN LF
0.1 F 0.1 F
VO25V
10 F
VO15V
DIAG
470 F
STCAP
SVR
DDL S-GND
10 F
12228
2
3
4
9
7
10 5 15 14 16 13 18,24
19
17
25
21
23
11 6 20
1TAB
47 F
22K 22K
10K
10K
P O = 4 X 7W S.E. APPLICATION
IN R
VO3
VCC1
D96AU515
+
RESET
10 F
PW-GND
1000 FVCC2
0.1 F
VCC
-
OUT R
-
+
OUT L
ST-BY
1F
MUTE
10 F
0.22 F
8.5V
IN L
0.22 F
VO25V
10 F
VO15V
DIAG
470 F
STCAP
SVR
DDL S-GND
10 F
1222
8
2
3
4
9
7
105 15 14 16 13
18,24
19
17
25
21
23
11 6 20
1TAB
47 F
22K 22K
10K
10K
P O = 2 X 22W BTL APPLICATION
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ELECTRICAL CHARACTERISTICS (continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
DIAGNOSTIC OUTPUTDiag On Vs Low Vs Diag. ON Threshold 7 7.5 8 VDiag Off Vs Low Vs Diag. OFF Thrershold 7.6 VDiag Hyst Vs Low Vs Diag. Hysteresis 100 150 mVDiag Dump Diag. Threshold vs Overvoltage 20 21 22 V
Diag OnDrop
VREG3 Output Voltage DropBefore Diag. Activation
IO3 = 100mA 90 200 mV
Vout On Diag Diag. Output Voltage D iag activatedR (Diag to V REG1 ) 15K
1.5 V
VO2 Output Voltage 2 I O2 = 5mA 4.85 5 5.15 VVO2 Load Regulation 2 I O2 = 5 to 500mA 100 mVIL02 Current Limit 2 V O2 = 0V 0.8 1 1.5 A
VO2 Dropout Voltage I O2 = 500mA 1 1.5 VSVR Ripple Rejection V ripple = 1Vpp; I 02 = 100mA
f = 100Hzf = 10KHz
6050
dBdB
VO2 Line Regulation V S = 8 to 18V, I O2 = 5mA 10 40 mVVO3 Output Voltage 3 I O3 = 5mA 8.25 8.5 8.75 V
VO3 Load Regulation 3 I O3 = 5 to 200mA 80 mVIL03 Current Limit 3 300 400 800 mA
VO3 Dropout Voltage I O3 = 200mA 1 VSVR Ripple Rejection V ripple = 1Vpp; I 03 = 100mA
f = 100Hzf = 10KHz
6050
dBdB
VO3 Line Regulation 3 V S = 11 to 18V, I O3 = 5mA 10 40 mV
REG1
5V 150mA
REG3
8.5V 200mA
STCAP
OUTSHORT
OUTSHORT
EN
REG2
5V 500mA
OUTSHORT
EN
+
-
+
-
7.5V
21V
HYST=0.1V
DUMP
Tj>170
+
-
+
-
2.8V
2.2V
AMPLIFIERSOVERLOAD
AMPLIFIERS
CLIPPINGENREFERENCE
+
-4VHYST=0.5V
DROP SENSE
OUT
Tj>150
VCC
DIAG
D96AU504B
STCAP
REG1
RESET
REG3
CD
ST-BYREG2
DIAGNOSTIC DIAGRAM
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7.6
VCC
4
VREG1
4.25
OFF
ON
RESET
ST-BY
2.2
5VVREG2
8.5VREG3
OFFDIAG
OND96AU505B
8.5
5
VOLTAGE SUPPLY SECTION WAVEFORMS
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t
t
t
MUTE PINVOLTAGE
Vs
OUTPUT
WAVEFORM
Vpin 16WAVEFORM
SHORT TO GNDOR TO VsD96AU516
CLIPPINGTHERMAL
PROXIMITY
ST-BY PINVOLTAGE
t
AUDIO SECTION WAVEFORMS
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Flexiwatt25
DIM. mm inchMIN. TYP. MAX. MIN. TYP. MA X.A 4.45 4.50 4.65 0.175 0.177 0.183B 1.80 1.90 2.00 0.070 0.074 0.079C 1.40 0.055
D 0.75 0.90 1.05 0.029 0.035 0.041E 0.37 0.39 0.42 0.014 0.015 0.016F (1) 0.57 0.022
G 0.80 1.00 1.20 0.031 0.040 0.047G1 23.75 24.00 24.25 0.935 0.945 0.955
H (2) 28.90 29.23 29.30 1.138 1.150 1.153H1 17.00 0.669H2 12.80 0.503H3 0.80 0.031
L (2) 22.07 22.47 22.87 0.869 0.884 0.904L1 18.57 18.97 19.37 0.731 0.747 0.762
L2 (2) 15.50 15.70 15.90 0.610 0.618 0.626L3 7.70 7.85 7.95 0.303 0.309 0 .313L4 5 0.197L5 3.5 0.138M 3.70 4.00 4.30 0.145 0.157 0 .169
M1 3.60 4.00 4.40 0.142 0.157 0.173N 2.20 0.086O 2 0.079R 1.70 0.067
R1 0.5 0.02R2 0.3 0.12R3 1.25 0.049R4 0.50 0.019V 5 (Typ.)
V1 3 (Typ.)V2 20 (Typ.)V3 45 (Typ.)
(1): dam-bar protusion not included(2): molding protusion included
H3
R4
GV
G1
L 2
H1H
FM1
L
FLEX25ME
V3
O
L 3
L 4
H2
R3
N
V2
R
R2
R2
C
B
L1
M
R1
L5 R1 R1
E
D
A
V
V1
V1
OUTLINE ANDMECHANICAL DATA
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Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequencesof use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license isgranted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication aresubject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics productsare 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 1999 STMicroelectronics Printed in Italy All Rights Reserved
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