www.docs.chipfind.ru
TDA7451
4x7W OR 2x22W CAR RADIO POWER AMPLIFIER PLUS
TRIPLE POWER SUPPLY
PRELIMINARY DATA
HIGH OUTPUT POWER CAPABILITY:
4 x 9.5W OR 2 x 32W/4
MAX
4 x 8.5W OR 2 x 28W/4
EIAJ
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-
TURE
PROTECTIONS
General:
LOAD DUMP
OVERRATING CHIP TEMPERATURE
Audio Section:
OUT SHORT (TO GND, TO Vs
AND
ACROSS THE LOAD)
Power Supply Section:
SHORT CIRCUIT PROTECTION (OUT TO
GND)
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
V
O3
V
CC1
D95AU311C
+
-
+
RESET
10
F
+
-
+
PW-GND
1000
F
V
CC2
0.1
F
V
CC
200mA
REG.
-
-
+
RF
RR
-
-
+
LF
LR
HVCC
hvcc
ST-BY
1
F
MUTE
10K
IN RR
0.1
F
0.1
F
500mA
REG.
8.5V
IN LR
IN LF
0.1
F
0.1
F
V
O2
5V
150mA
REG.
10
F
V
O1
5V
DIAG
470
F
STCAP
SVR
DDL
S-GND
10
F
12
22
8
2
3
4
9
7
10
5
15
14
16
13
18,24
19
17
25
21
23
11
6
20
1
TAB
47
F
22K
22K
DIAG
10
F
10K
BLOCK DIAGRAM
Flexiwatt25
ORDERING NUMBER: TDA7451
1/9
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
S
Operating Supply Voltage
18
V
V
S
DC Supply Voltage
28
V
V
S
Peak Supply Voltage (t = 50ms)
40
V
I
o
Audio Output Peak Current (non repetitive t = 100
s)
4
A
Audio Output Peak Current (repetitive f > 10Hz)
3
A
I
o
Voltage Regulators Output Current
internally limited
P
tot
Power Dissipation at T
case
= 85
C
55
W
T
stg
, T
j
Storage and Junction Temperature Range
-40 to 150
C
V
out
Output Voltages (DIAG, RESET)
7
V
V
in
Input Voltages (ST-BY, MUTE)
18
V
RESR
Output capacitor series resistance
0.2 to 10
THERMAL DATA
Symbol
Parameter
Unit
R
th j-case
Thermal Resistance Junction-case
1.2
C/W
D95AU315
TAB
1
25
REG3
REG2
REG1
ST-CAP
VCC1
DIAG
ST-BY
RESET
SVR
IN-RF
IN-RR
SGND
IN-LR
IN-LF
DDL
OUT-LF
PWGND
OUT-LR
VCC2
OUT-RR
MUTE
OUT-RF
PWGND
HVCC
PIN CONNECTION
TDA7451
2/9
IN RF
V
O3
V
CC1
D96AU514
+
RESET
10
F
+
PW-GND
1000
F
V
CC2
0.1
F
V
CC
-
-
+
RF
RR
-
-
+
LF
LR
HVCC
ST-BY
1
F
MUTE
10
F
IN RR
0.1
F
0.1
F
8.5V
IN LR
IN LF
0.1
F
0.1
F
V
O2
5V
10
F
V
O1
5V
DIAG
470
F
STCAP
SVR
DDL
S-GND
10
F
12
22
8
2
3
4
9
7
10
5
15
14
16
13
18,24
19
17
25
21
23
11
6
20
1
TAB
47
F
22K
22K
10K
10K
P
O
= 4 X 7W S.E. APPLICATION
IN R
V
O3
V
CC1
D96AU515
+
RESET
10
F
PW-GND
1000
F
V
CC2
0.1
F
V
CC
-
OUT R
-
+
OUT L
ST-BY
1
F
MUTE
10
F
0.22
F
8.5V
IN L
0.22
F
V
O2
5V
10
F
V
O1
5V
DIAG
470
F
STCAP
SVR
DDL
S-GND
10
F
12
22
8
2
3
4
9
7
10
5
15
14
16
13
18,24
19
17
25
21
23
11
6
20
1
TAB
47
F
22K
22K
10K
10K
P
O
= 2 X 22W BTL APPLICATION
TDA7451
3/9
ELECTRICAL CHARACTERISTICS (Refer to the test circuit; V
S
= 14.4V; R
L
= 4
, T
amb
= 25
C,
f = 1kHz, unless otherwise specified)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
GENERAL
I
q
Total Quiescent Current
I
L01
, I
L02
, I
L03
= 5mA
80
150
mA
V
SB IN
ST-BY IN Threshold Voltage
1.5
V
V
SB OUT
ST-BY OUT Threshold Voltage
3.5
V
I
ST-BY
Stand-by Current Consumption
I
L01
= 2mA
0.5
mA
AUDIO SECTION
P
O
Output Power
R
L
= 4
; THD = 10%
Bridge
Single Ended
19
6
22
7
W
W
P
o EIAJ
EIAJ Output Power (**)
VS = 13.7V
Bridge
Single Ended
26
7.5
28
8.5
W
W
P
o max.
Max. Output Power (**)
VS = 14.4V
Bridge
Single Ended
30
8
32
9.5
W
W
d
Distortion
R
L
= 4
;
Single Ended, P
O
= 0.1 to 3W
Bridge, P
O
= 0.1 to 8W
0.04
0.06
0.3
0.3
%
%
CT
Cross Talk
f = 1kHz; R
g
= 0
f = 10kHz; R
g
= 0
50
60
55
dB
dB
R
IN
Input Impedance
Single Ended
Bridge
70
35
100
50
130
65
K
K
G
V
Voltage Gain
Single Ended
Bridge
19
25
20
26
21
27
dB
dB
G
V
Voltage Gain Match.
1
dB
BW
Bandwidth
-3dB
100
KHz
E
NO
Output Noise Voltage (*)
R
g
= 0; Single Ended
100
V
SVR
Supply Voltage Rejection
R
g
= 0; f = 100Hz; Single Ended
48
55
dB
ASB
Stand-by Attenuation
90
100
dB
I
PIN 8
ST-BY Pin Current
Play mode; Vpin8 = 5V
-10
30
A
A
M
MUTE Attenuation
80
90
dB
V
M IN
MUTE IN Threshold Voltage
1.5
V
V
M OUT
MUTE OUT Threshold Voltage
3.5
V
I
CD
Clipping Detector Current
(Pull up to 5V with 10K
)
CDoff: P
omin
= 3.5W
5
A
CDon: THD = 5%
50
190
280
A
POWER SUPPLY SECTION
V
O1
Output Voltages
I
01
= 5mA
4.85
5
5.15
V
V
O1
Load Regulation 1
I
01
= 5 to 150mA
80
mV
I
LO1
Current Limit
V
01
= 0V
250
350
600
mA
V
O1
Dropout Voltages
I
01
= 150mA
700
mV
SVR
Ripple Rejection
V
ripple
= 1Vpp; I
01
= 50mA
f = 100Hz
f = 10KHz
60
50
dB
dB
V
O1
Line Regulation 1
V
S
= 8 to 18V; I
O1
= 5mA
10
40
mV
RESET
Reset On
Low V
REG1
Reset On Threshold
3.5
4.0
4.7
V
Reset Off
Low V
REG1
Reset Off Threshold
4.25
V
Reset Hyst
Reset Threshold Hysteresis vs
Reg 1
250
500
mV
V
out
on Reset
Reset Output Voltage
Reset activated
R(Reset to V
Reg1
)
15K
1.5
V
(*) 22Hz to 22KHz
TDA7451
4/9
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
DIAGNOSTIC OUTPUT
Diag On Vs
Low Vs Diag. ON Threshold
7
7.5
8
V
Diag Off Vs
Low Vs Diag. OFF Thrershold
7.6
V
Diag Hyst Vs
Low Vs Diag. Hysteresis
100
150
mV
Diag Dump
Diag. Threshold vs Overvoltage
20
21
22
V
Diag On
Drop
V
REG3
Output Voltage Drop
Before Diag. Activation
I
O3
= 100mA
90
200
mV
V
out
On Diag
Diag. Output Voltage
Diag activated
R (Diag to V
REG1
)
15K
1.5
V
V
O2
Output Voltage 2
I
O2
= 5mA
4.85
5
5.15
V
V
O2
Load Regulation 2
I
O2
= 5 to 500mA
100
mV
I
L02
Current Limit 2
V
O2
= 0V
0.8
1
1.5
A
V
O2
Dropout Voltage
I
O2
= 500mA
1
1.5
V
SVR
Ripple Rejection
V
ripple
= 1Vpp; I
02
= 100mA
f = 100Hz
f = 10KHz
60
50
dB
dB
V
O2
Line Regulation
V
S
= 8 to 18V, I
O2
= 5mA
10
40
mV
V
O3
Output Voltage 3
I
O3
= 5mA
8.25
8.5
8.75
V
V
O3
Load Regulation 3
I
O3
= 5 to 200mA
80
mV
I
L03
Current Limit 3
300
400
800
mA
V
O3
Dropout Voltage
I
O3
= 200mA
1
V
SVR
Ripple Rejection
V
ripple
= 1Vpp; I
03
= 100mA
f = 100Hz
f = 10KHz
60
50
dB
dB
V
O3
Line Regulation 3
V
S
= 11 to 18V, I
O3
= 5mA
10
40
mV
REG1
5V 150mA
REG3
8.5V 200mA
STCAP
OUT
SHORT
OUT
SHORT
EN
REG2
5V 500mA
OUT
SHORT
EN
+
-
+
-
7.5V
21V
HYST=0.1V
DUMP
Tj>170
+
-
+
-
2.8V
2.2V
AMPLIFIERS
OVERLOAD
AMPLIFIERS
CLIPPING
EN
REFERENCE
+
-
4V
HYST=0.5V
DROP SENSE
OUT
Tj>150
VCC
DIAG
D96AU504B
STCAP
REG1
RESET
REG3
CD
ST-BY
REG2
DIAGNOSTIC DIAGRAM
TDA7451
5/9
PDF 
ZIP