£77
. POWER C
32W/4Q
28W/4Q
4 x 7W OR 2 x 22W/4s1 @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 (ZOdB)
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 @ SOOmA WITH ST-BY
- 8.5V @ 200mA WITH ST-BY
. REGULATORS DIAGNOSTIC FEATURE: UN-
DERVOLTAGE, 8.5V DROP SENSE SHORT
CIRCUIT, LOAD DUMP, OVER-TEMPERA-
BLOCK DIAGRAM
Flexiwalt25
ORDERING NUMBER: TDA7-151
TURE
PROTECTIONS
General:
I LOAD DUMF'
I OVERRATING CHIP TEMPERATURE
Audio Seciion:
I OUT SHORT (70 GND, TO Vs
ACROSSTI-‘E OAD)
Power SIII‘uIy Seciion:
I SH( HT CIRCUIT PROTECTION (OUT T
N
._l
AN
IN RR IN RF
W1 1W
SOOmA
5v
m; 25
chc
LA
TT
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/4Ω MAX
4 x 8.5W OR 2 x 28W/4Ω EIAJ
4 x 7W OR 2 x 22W/4Ω @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
10μF
+
-
+
PW-GND
1000μF
V
CC2
0.1μF
V
CC
200mA
REG.
-
-+
RF
RR
-
-+
LF
LR
HVCChvcc
ST-BY
1μF
MUTE 10KΩ
IN RR
0.1μF0.1μF
500mA
REG.
8.5V
IN LR
IN LF
0.1μF0.1μF
V
O2
5V
150mA
REG.
10μF
V
O1
5V
DIAG
470μF
STCAP
SVR
DDL S-GND
10μF
12
22
8
2
3
4
9
7
10 5 15 14 16 13 18,24
19
17
25
21
23
11 620
1TAB
47μF
22K 22K
DIAG
10μF
10KΩ
BLOCK DIAGRAM
Flexiwatt25
ORDERING NUMBER: TDA7451
1/9
Obsolete Product(s) - Obsolete Product(s)
Obsolete Product(s) - Obsolete Product(s)
RE: UN
SE, SHO
R-TEMPER
D DUMP
VERRAT
Audio Se
Ob
OU
od
Ob
S
P
P
P
eP
10
Ω
od
R
TDA745
vum
vm mpm Voha es1STrBY MUTE)
RESR ompm capacmor senes resistance
PIN CONNECTION
THERMAL DATA
Obsolete Product(s) - Obsolete Product(s)
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VSOperating Supply Voltage 18 V
VSDC Supply Voltage 28 V
VSPeak Supply Voltage (t = 50ms) 40 V
IoAudio Output Peak Current (non repetitive t = 100μs) 4 A
Audio Output Peak Current (repetitive f > 10Hz) 3 A
IoVoltage Regulators Output Current internally limited
Ptot Power Dissipation at Tcase = 85°C55W
Tstg, TjStorage and Junction Temperature Range -40 to 150 °C
Vout Output Voltages (DIAG, RESET) 7 V
Vin Input Voltages (ST-BY, MUTE) 18 V
RESR Output capacitor series resistance 0.2 to 10 Ω
THERMAL DATA
Symbol Parameter Unit
Rth j-case Thermal Resistance Junction-case 1.2 °C/W
D95AU315
TAB
125
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
Obsolete Product(s) - Obsolete Product(s)
)
(s
t(s)
(s
ct(
V
Ω
let
Ob
roduct(s) - Ob
uct
r
1
5v
u w; mm:
W LF w m
MuTE
srrav
a 5»
iv
5v
Obsolete Product(s) - Obsolete Product(s)
IN RF
V
O3
V
CC1
D96AU514
+
RESET
10μF
+
PW-GND
1000μFV
CC2
0.1μF
V
CC
-
-+
RF
RR
-
-+
LF
LR
HVCC
ST-BY
1μF
MUTE
10μF
IN RR
0.1μF0.1μF
8.5V
IN LR
IN LF
0.1μF0.1μF
V
O2
5V
10μF
V
O1
5V
DIAG
470μF
STCAP
SVR
DDL S-GND
10μF
12
22
8
2
3
4
9
7
10 5 15 14 16 13 18,24
19
17
25
21
23
11 620
1TAB
47μF
22K 22K
10KΩ
10KΩ
PO = 4 X 7W S.E. APPLICATION
IN R
V
O3
V
CC1
D96AU515
+
RESET
10μF
PW-GND
1000μF
V
CC2
0.1μF
V
CC
-
OUT R
-
+
OUT L
ST-BY
1μF
MUTE
10μF
0.22μF
8.5V
IN L
0.22μF
V
O2
5V
10μF
V
O1
5V
DIAG
470μF
STCAP
SVR
DDL S-GND
10μF
1222
8
2
3
4
9
7
10 5 1514 1613
18,24
19
17
25
21
23
11 6 20
1TAB
47μF
22K 22K
10KΩ
10KΩ
PO = 2 X 22W BTL APPLICATION
TDA7451
3/9
Obsolete Product(s) - Obsolete Product(s)
O
olete P
uc
du
P
P
P
du
d
d
-
uc
uc
IN
bs
bs
bs
bs
bs
b
b
LF
b
Ob
Ob
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0.
Ob
Ob
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o
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16 13
Pro
Pro
Pr
P
P
1
AB
ct(s
Ob
te
ete
et
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ST-BY
od
Pr
P
Pr
Pr
P
Pr
Pr
P
μ
F
8
10K
Ω
ompm Power (M)
1 Power (M)
Impedance
Gam
Gam Match
Nowse Vo‘ta e ‘
Vo‘la e R 'eclion
Attenuauon
Cuflem
Attenuatiun
MUTE IN Threslmld V
V MUTE OUT Thre
\cu cuppmg Deter:
(Putt up to 5v
POWER SUPPL
v
AV
\Lm
AV
SVR
Sm Ie Ended
VS : 13 7V
Bndge
Sm Ie Ended
vs : 14 4v
Bndge
Sm Ie Ended
RL : 411?
Smgle Ended‘ Po : 0,1 m 3w
Bn P : u I m aw
i: Itz; : o
«: IOkHz: : o
Smgle Ended
Bn
Smgle Ended
BM
3118
R 0 S‘ \e Ended
I: |OOHZ S‘ \e Ended
We made; V m8 : 5V
Obsolete Product(s) - Obsolete Product(s)
ELECTRICAL CHARACTERISTICS (Refer to the test circuit; VS = 14.4V; RL = 4Ω, Tamb = 25°C,
f = 1kHz, unless otherwise specified)
Symbol Parameter Test Condition Min. Typ. Max. Unit
GENERAL
IqTotal Quiescent Current IL01, IL02, IL03 = 5mA 80 150 mA
VSB IN ST-BY IN Threshold Voltage 1.5 V
VSB OUT ST-BY OUT Threshold Voltage 3.5 V
IST-BY Stand-by Current Consumption IL01 = 2mA 0.5 mA
AUDIO SECTION
POOutput Power RL = 4Ω; THD = 10%
Bridge
Single Ended 19
622
7W
W
Po EIAJ EIAJ Output Power (**) VS = 13.7V
Bridge
Single Ended 26
7.5 28
8.5 W
W
Po max. Max. Output Power (**) VS = 14.4V
Bridge
Single Ended 30
832
9.5 W
W
d Distortion RL = 4Ω;
Single Ended, PO = 0.1 to 3W
Bridge, PO = 0.1 to 8W 0.04
0.06 0.3
0.3 %
%
CT Cross Talk f = 1kHz; Rg = 0
f = 10kHz; Rg = 0 50 60
55 dB
dB
RIN Input Impedance Single Ended
Bridge 70
35 100
50 130
65 KΩ
KΩ
GVVoltage Gain Single Ended
Bridge 19
25 20
26 21
27 dB
dB
GVVoltage Gain Match. 1 dB
BW Bandwidth -3dB 100 KHz
ENO Output Noise Voltage (*) Rg = 0; Single Ended 100 μV
SVR Supply Voltage Rejection Rg = 0; f = 100Hz; Single Ended 48 55 dB
ASB Stand-by Attenuation 90 100 dB
IPIN 8 ST-BY Pin Current Play mode; Vpin8 = 5V -10 30 μA
AMMUTE Attenuation 80 90 dB
VM IN MUTE IN Threshold Voltage 1.5 V
VM OUT MUTE OUT Threshold Voltage 3.5 V
ICD Clipping Detector Current
(Pull up to 5V with 10KΩ)CDoff: Pomin = 3.5W 5 μA
CDon: THD = 5% 50 190 280 μA
POWER SUPPLY SECTION
VO1 Output Voltages I01 = 5mA 4.85 5 5.15 V
ΔVO1 Load Regulation 1 I01 = 5 to 150mA 80 mV
ILO1 Current Limit V01 = 0V 250 350 600 mA
ΔVO1 Dropout Voltages I01 = 150mA 700 mV
SVR Ripple Rejection Vripple = 1Vpp; I01 = 50mA
f = 100Hz
f = 10KHz 60
50 dB
dB
ΔVO1 Line Regulation 1 VS = 8 to 18V; IO1 = 5mA 10 40 mV
RESET
Reset On Low VREG1 Reset On Threshold 3.5 4.0 4.7 V
Reset Off Low VREG1 Reset Off Threshold 4.25 V
Reset Hyst Reset Threshold Hysteresis vs
Reg 1 250 500 mV
Vout on Reset Reset Output Voltage Reset activated
R(Reset to VReg1)≥ 15K 1.5 V
(*) 22Hz to 22KHz
TDA7451
4/9
Obsol
so
Obs
Ob
O
Ob
olete P
eP
t
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let
Pr
Pro
Prod
rod
oduct(s) - Obsolete Product(s)
)
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bso
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W
W
32
9.5
Ended
-3dB
R
g
g
n
ion
ent
ation
E IN Thresho
OUT T
Clipping D
(Pull u
WER SUP
V
O1
Δ
V
t Vo‘ta e ‘0: : 200mA
Rejection Vylpph: IVpp m = 100
i: 10on
f: woKHz
mauon 3 v5 :11 «MEN ‘0: : Em
C DIAGRAM
ow: gm
sv:.y
mm m
REG‘
5V ‘SUmA
.w .
mm W fl—r
REGS
8 5V ZUDMA DROP SEVSE
EV Du’
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_ I, mm m
m P REGZ
5V SUUMA
4% EV
mmzps
mmmu
REFERENCE EN mm 4’:D—{
AMPUHERS
n, :3
Obsolete Product(s) - Obsolete Product(s)
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 VREG3 Output Voltage Drop
Before Diag. Activation IO3 = 100mA 90 200 mV
Vout On Diag Diag. Output Voltage Diag activated
R (Diag to VREG1)≥ 15K 1.5 V
VO2 Output Voltage 2 IO2 = 5mA 4.85 5 5.15 V
ΔVO2 Load Regulation 2 IO2 = 5 to 500mA 100 mV
IL02 Current Limit 2 VO2 = 0V 0.8 1 1.5 A
ΔVO2 Dropout Voltage IO2 = 500mA 1 1.5 V
SVR Ripple Rejection Vripple = 1Vpp; I02 = 100mA
f = 100Hz
f = 10KHz 60
50 dB
dB
ΔVO2 Line Regulation VS = 8 to 18V, IO2 = 5mA 10 40 mV
VO3 Output Voltage 3 IO3 = 5mA 8.25 8.5 8.75 V
ΔVO3 Load Regulation 3 IO3 = 5 to 200mA 80 mV
IL03 Current Limit 3 300 400 800 mA
ΔVO3 Dropout Voltage IO3 = 200mA 1 V
SVR Ripple Rejection Vripple = 1Vpp; I03 = 100mA
f = 100Hz
f = 10KHz 60
50 dB
dB
ΔVO3 Line Regulation 3 VS = 11 to 18V, IO3 = 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
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
Obsole
Ob
olete Prod
te
oduct(s) - Obso
bs
)
)-
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(s)
bsole
sol
olet
let
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uc
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uc
Pro
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0mV
1.5 A
11.5
50
8.
A
= 1Vpp; I
0
0H
0KHz
V
S
duc
et
HYST=
te
te
e
e
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425
Obsolete Product(s) - Obsolete Product(s)
7.6
VCC
4
VREG1
4.25
OFF
ON
RESET
ST-BY
2.2
5V
VREG2
8.5
VREG3
OFF
DIAG
ON
D96AU505B
8.5
5
VOLTAGE SUPPLY SECTION WAVEFORMS
TDA7451
6/9
Obsolete Product(s) - Obsolete Product(s)
Ob
et
Pr
s)
P
d
oduct
Prod
od
O
ole
P
P
Product(s
du
P
P
P
5
VREG2
t(
uct(s) - Obsolete
Dwuzv
CL
Obsolete Product(s) - Obsolete Product(s)
t
t
t
MUTE PIN
VOLTAGE
Vs
OUTPUT
WAVEFORM
Vpin 16
WAVEFORM
SHORT TO GND
OR TO Vs
D96AU516
CLIPPING THERMAL
PROXIMITY
ST-BY PIN
VOLTAGE
t
AUDIO SECTION WAVEFORMS
TDA7451
7/9
Obsolete Product(s) - O
ct(
Obs
O
O
solete
te
6AU516
O
Obso
te P
te P
Pro
Pro
rod
rod
duct(s)
t(
t(
t
d
d
rodu
P
t
te P
0.731 0747
0.510 0618
0.303 0309
0.197
0.138
0.145 0157
0.142 0157
0.086
0.079
0.067
0.02
0.12
0.049
0.019
Flexiwatt25
L2
El
Obsolete Product(s) - Obsolete Product(s)
Flexiwatt25
DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 4.45 4.50 4.65 0.175 0.177 0.183
B 1.80 1.90 2.00 0.070 0.074 0.079
C 1.40 0.055
D 0.75 0.90 1.05 0.029 0.035 0.041
E 0.37 0.39 0.42 0.014 0.015 0.016
F (1) 0.57 0.022
G 0.80 1.00 1.20 0.031 0.040 0.047
G1 23.75 24.00 24.25 0.935 0.945 0.955
H (2) 28.90 29.23 29.30 1.138 1.150 1.153
H1 17.00 0.669
H2 12.80 0.503
H3 0.80 0.031
L (2) 22.07 22.47 22.87 0.869 0.884 0.904
L1 18.57 18.97 19.37 0.731 0.747 0.762
L2 (2) 15.50 15.70 15.90 0.610 0.618 0.626
L3 7.70 7.85 7.95 0.303 0.309 0.313
L4 5 0.197
L5 3.5 0.138
M 3.70 4.00 4.30 0.145 0.157 0.169
M1 3.60 4.00 4.40 0.142 0.157 0.173
N 2.20 0.086
O 2 0.079
R 1.70 0.067
R1 0.5 0.02
R2 0.3 0.12
R3 1.25 0.049
R4 0.50 0.019
V5˚ (Typ.)
V1 3˚ (Typ.)
V2 20˚ (Typ.)
V3 45˚ (Typ.)
(1): dam-bar protusion not included
(2): molding protusion included
H3
R4
G
VG1
L2
H1
H
FM1
L
FLEX25ME
V3
OL3 L4
H2
R3
N
V2
R
R2
R2
C
B
L1
M
R1
L5 R1 R1
E
D
A
V
V1
V1
OUTLINE AND
MECHANICAL DATA
TDA7451
8/9
Obsol
Ob
ol
ol
L2
lete Produc
te Pro
e
Pro
te Pro
P
te P
ro
Pro
Pr
Pr
ro
rod
Prod
H3
o
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odu
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duct(s) - Obsolete Product(s)
let
t(
t(
t(
t(
t(
t(
t
t
t
t(
t
t(
t
t
t
t
c
c
c
c
c
c
u
d
d
d
d
d
d
d
d
d
let
O
Ob
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)-O
O
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e
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Obsolete Product(s) - Obsolete Product(s)
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are
subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products
are 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
STMicroelectronics GROUP OF COMPANIES
Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco -
Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A.
http://www.st.com
TDA7451
9/9
Obsolete Product(s) - Obsolete Product(s)
Products related to this Datasheet
IC AMP AB DUAL/QUAD 25FLEXIWATT