tda7293, elektronika, podzespoły
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[
TDA7293
120V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY
VERY HIGH OPERATING VOLTAGE RANGE
(
±
50V)
DMOS POWER STAGE
HIGH OUTPUT POWER (100W @ THD =
10%, R
L
=8
W
,V
S
=
±
40V)
MUTING/STAND-BY FUNCTIONS
NO SWITCH ON/OFF NOISE
VERY LOW DISTORTION
VERY LOW NOISE
SHORT CIRCUIT PROTECTED (WITH NO IN-
PUT SIGNAL APPLIED)
THERMAL SHUTDOWN
CLIP DETECTOR
MODULARITY (MORE DEVICES CAN BE
EASILY CONNECTED IN PARALLEL TO
DRIVE VERY LOW IMPEDANCES)
MULTIPOWER BCD TECHNOLOGY
Multiwatt15
ORDERING NUMBER:
TDA7293V
class TV). Thanks to the wide voltage range and
to the high out current capability it is able to sup-
ply the highest power into both 4
W
and 8
W
loads.
The built in muting function with turn on delay
simplifies the remote operation avoiding switching
on-off noises.
Parallel mode is made possible by connecting
more device through of pin11. High output power
can be delivered to very low impedance loads, so
optimizing the thermal dissipation of the system.
DESCRIPTION
The TDA7293 is a monolithic integrated circuit in
Multiwatt15 package, intended for use as audio
class AB amplifier in Hi-Fi field applications
(Home Stereo, self powered loudspeakers, Top-
Figure 1:
Typical Application and Test Circuit
C7 100nF
+Vs
C6 1000
m
F
R3 22K
+Vs
BUFFER DRIVER
11
+PWVs
C2
22
m
F
R2
680
W
7
13
IN-
2
-
14
OUT
C1 470nF
IN+
3
+
BOOT
LOADER
R1 22K
12
SGND
4
C5
22
m
F
(*)
(**)
6
BOOTSTRAP
VMUTE
R5 10K
MUTE
10
5
VCLIP
MUTE
THERMAL
SHUTDOWN
S/C
PROTECTION
CLIP DET
VSTBY
STBY
9
STBY
R4 22K
1
STBY-GND
8
-Vs
15
-PWVs
C3 10
m
F
C4 10
m
F
C9 100nF
C8 1000
m
F
D97AU805A
-Vs
(*) see Application note
(**) for SLAVE function
October 2000
1/13
TDA7293
PIN CONNECTION
(Top view)
15
-V
S
(POWER)
OUT
+V
S
(POWER)
BOOTSTRAP LOADER
14
13
12
11
BUFFER DRIVER
MUTE
STAND-BY
-V
S
(SIGNAL)
+V
S
(SIGNAL)
BOOTSTRAP
CLIP AND SHORT CIRCUIT DETECTOR
SIGNAL GROUND
NON INVERTING INPUT
INVERTING INPUT
STAND-BY GND
10
9
8
7
6
5
4
3
2
1
TAB CONNECTED TO PIN 8
D97AU806
QUICK REFERENCE DATA
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
S
Supply Voltage Operating
±
12
æ 50
V
G
LOOP
Closed Loop Gain
26
40
dB
P
tot
Output Power
V
S
=
±
45V; R
L
=8
W
; THD = 10%
140
W
V
S
=
±
30V; R
L
=4
W
; THD = 10%
110
W
SVR
Supply Voltage Rejection
75
dB
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
S
Supply Voltage (No Signal)
±
60
V
V
1
V
STAND-BY
GND Voltage Referred to -V
S
(pin 8)
90
V
V
2
Input Voltage (inverting) Referred to -V
S
90
V
V
2
-V
3
Maximum Differential Inputs
±
30
V
V
3
Input Voltage (non inverting) Referred to -V
S
90
V
V
4
Signal GND Voltage Referred to -V
S
90
V
V
5
Clip Detector Voltage Referred to -V
S
120
V
V
6
Bootstrap Voltage Referred to -V
S
120
V
V
9
Stand-by Voltage Referred to -V
S
120
V
V
10
Mute Voltage Referred to -V
S
120
V
V
11
Buffer Voltage Referred to -V
S
120
V
V
12
Bootstrap Loader Voltage Referred to -V
S
100
V
I
O
Output Peak Current
10
A
P
tot
Power Dissipation T
case
=70
°
C
50
W
T
op
Operating Ambient Temperature Range
0 to 70
°
C
T
stg
,T
j
Storage and Junction Temperature
150
°
C
THERMAL DATA
Symbol
Description
Typ
Max
Unit
R
th j-case
Thermal Resistance Junction-case
1
1.5
°
C/W
2/13
TDA7293
ELECTRICAL CHARACTERISTICS
(Refer to the Test Circuit V
S
=
±
40V, R
L
=8
W
,R
g
=50
W
;
T
amb
=25
°
C, f = 1 kHz; unless otherwise specified).
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
S
Supply Range
±
12
50
V
I
q
Quiescent Current
30
mA
I
b
Input Bias Current
0.3
1
m
A
V
OS
Input Offset Voltage
-10
10
mV
I
OS
Input Offset Current
0.2
m
A
P
O
RMS Continuous Output Power
d = 1%:
R
L
=4
80
80
W
W;
V
S
=
±
29V,
d = 10%
R
L
=4
100
100
W
W
;V
S
=
±
29V
d
Total Harmonic Distortion (**)
P
O
= 5W; f = 1kHz
P
O
= 0.1 to 50W; f = 20Hz to 15kHz
0.005
%
%
0.1
I
SC
Current Limiter Threshold
V
S
3±
40V
6.5
A
SR
Slew Rate
15
V/
m
s
G
V
Open Loop Voltage Gain
80
dB
G
V
Closed Loop Voltage Gain (1)
30
dB
e
N
Total Input Noise
A = curve
f = 20Hz to 20kHz
1
2
m
V
5
m
V
R
i
Input Resistance
100
k
W
SVR
Supply Voltage Rejection
f = 100Hz; V
ripple
= 0.5Vrms
75
dB
T
S
Thermal Protection
DEVICE MUTED
150
°
C
DEVICE SHUT DOWN
160
°
C
STAND-BY FUNCTION
(Ref: to pin 1)
V
ST on
Stand-by on Threshold
1.5
V
V
ST of f
Stand-by off Threshold
3.5
V
ATT
st-by
Stand-by Attenuation
70
90
dB
I
q st-by
Quiescent Current @ Stand-by
0.5
mA
MUTE FUNCTION
(Ref: to pin 1)
V
Mon
Mute on Threshold
1.5
V
V
Moff
Mute off Threshold
3.5
V
ATT
mute
Mute AttenuatIon
60
80
dB
CLIP DETECTOR
Duty
Duty Cycle ( pin 5)
THD = 1% ; RL = 10K
W
to 5V
10
%
THD = 10% ;
RL = 10K
40
%
W
to 5V
I
CLEAK
PO = 50W
1
m
A
SLAVE FUNCTION pin 4
(Ref: to pin 8 -V
S
)
V
Slave
SlaveThreshold
1
V
V
Master
Master Threshold
3
V
Note (1):
G
Vmin
.
26dB
Note:
Pin 11 only for modular connection. Max external load 1M
W
/10 pF, only for test purpose
Note (**):
Tested with optimized Application Board (see fig. 2)
3/13
±
TDA7293
Figure 2:
Typical Application P.C. Board and Component Layout (scale 1:1)
4/13
TDA7293
APPLICATION SUGGESTIONS
(see Test and Application Circuits of the Fig. 1)
The recommended values of the external components are those shown on the application circuit of Fig-
ure 1. Different values can be used; the following table can help the designer.
COMPONENTS
SUGGESTED VALUE
PURPOSE
LARGER THAN
SUGGESTED
SMALLER THAN
SUGGESTED
R1 (*)
22k
INPUT RESISTANCE INCREASE INPUT
IMPEDANCE
DECREASE INPUT
IMPEDANCE
R2
680
W
CLOSED LOOP GAIN
SET TO 30dB (**)
DECREASE OF GAIN INCREASE OF GAIN
R3 (*)
22k
INCREASE OF GAIN DECREASE OF GAIN
R4
22k
ST-BY TIME
CONSTANT
LARGER ST-BY
ON/OFF TIME
SMALLER ST-BY
ON/OFF TIME;
POP NOISE
R5
10k
MUTE TIME
CONSTANT
LARGER MUTE
ON/OFF TIME
SMALLER MUTE
ON/OFF TIME
C1
0.47
m
F
INPUT DC
DECOUPLING
HIGHER LOW
FREQUENCY
CUTOFF
C2
22
m
F
FEEDBACK DC
DECOUPLING
HIGHER LOW
FREQUENCY
CUTOFF
C3
10
m
F
MUTE TIME
CONSTANT
LARGER MUTE
ON/OFF TIME
SMALLER MUTE
ON/OFF TIME
C4
10
m
F
ST-BY TIME
CONSTANT
LARGER ST-BY
ON/OFF TIME
SMALLER ST-BY
ON/OFF TIME;
POP NOISE
C5
22
m
FXN (***)
BOOTSTRAPPING
SIGNAL
DEGRADATION AT
LOW FREQUENCY
C6, C8
1000
m
F
SUPPLY VOLTAGE
BYPASS
C7, C9
0.1
m
F
SUPPLY VOLTAGE
BYPASS
DANGER OF
OSCILLATION
(*) R1 = R3 for pop optimization
(**) Closed Loop Gain has to be
.
26dB
(***) Multiplay this value for the number of modular part connected
Slave function: pin 4 (Ref to pin 8 -V
S
)
Note:
If in the application, the speakers are connected
via long wires, it is a good rule to add between
the output and GND, a Boucherot Cell, in order to
avoid dangerous spurious oscillations when the
speakers terminal are shorted.
The suggested Boucherot Resistor is 3.9
W
/2W
and the capacitor is 1
m
F.
-V
S
+3V
MASTER
-V
S
+1V
UNDEFINED
SLAVE
-V
S
D98AU821
5/13
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