SGS Thomson Microelectronics TDA7294S Datasheet
TDA7294S
100V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY
VERY HIGH OPERATING VOLTAGE RANGE
(±45V)
DMOSPOWERSTAGE
HIGH OUTPUT POWER (100W @ THD =
10%, R
L =8Ω,VS=±40V MUSIC POWER)
MUTING/STAND-BY FUNCTIONS
NO SWITCHON/OFFNOISE
VERY LOWDISTORTION
VERY LOWNOISE
SHORTCIRCUITPROTECTION
THERMAL SHUTDOWN
CLIPDETECTOR
MODULARITY (MORE DEVICES CAN BE
EASILY CONNECTED IN PARALLEL TO
DRIVEVERYLOWIMPEDANCES)
DESCRIPTION
The TDA7294S 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-
Figure1: TypicalApplicationandTest Circuit
MULTIPOWER BCD TECHNOLOGY
Multiwatt15
ORDERING NUMBER: TDA7294SV
class TV). Thanks to the wide voltage range and
to the high out current capability it is able to supply the highest power into both4Ω and 8Ω loads.
The built in muting function with turn on delay
simplifiesthe 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
optimizingthe thermaldissipationof the system.
VMUTE
VSTBY
June 2000
C7 100nF C6 1000µF
R3 22K
C2
R2
22µF
680Ω
C1 470nF
R1 22K
R5 10K
R4 22K
C3 10µFC410µF
IN- 2
IN+
3
4
SGND
(**)
10
MUTE
9
STBY
(*) see Application
(**) for SLAVE function
note
MUTE
STBY
1
STBY-GND
+Vs
BUFFER DRIVER
713
11
-
+
THERMAL
SHUTDOWN
-Vs -PWVs
C9 100nF C8 1000µF
+PWVs+Vs
PROTECTION
158
-Vs
S/C
14
12
6
5
D97AU805A
OUT
BOOT
LOADER
C5
22µF
BOOTSTRAP
CLIP DET
(*)
VCLIP
1/13
TDA7294S
PIN CONNECTION (Top view)
TAB CONNECTED TO PIN 8
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
D97AU806
-V
(POWER)
S
OUT
(POWER)
+V
S
BOOTSTRAP LOADER
BUFFER DRIVER
MUTE
STAND-BY
-V
(SIGNAL)
S
+VS(SIGNAL)
BOOTSTRAP
CLIP AND SHORT CIRCUIT DETECTOR
SIGNAL GROUND
NON INVERTING INPUT
INVERTING INPUT
STAND-BY GND
QUICK REFERENCE DATA
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
G
LOOP
P
tot
SVR Supply Voltage Rejection 75 dB
Supply Voltage Operating ±12 ± 45 V
S
Closed Loop Gain 26 40 dB
Output Power VS=±40V; RL=8Ω; THD = 10% 100 W
= ±30V; RL =4Ω; THD = 10% 100 W
V
S
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
V
V
2 -V3 Maximum DifferentialInputs ±30 V
V
V
V
V
V
V
V
10
11 Buffer Voltage Referred to -VS 100 V
V
12 Bootstrap Loader Voltage Referred to -VS 90 V
V
I
O
P
tot
T
op
T
stg,Tj
Supply Voltage (No Signal) ±50 V
S
VSTAND-BY GND Voltage Referred to -VS (pin 8) 90 V
1
Input Voltage (inverting) Referred to -V
2
3 Input Voltage (non inverting) Referred to -VS 90 V
Signal GND Voltage Referred to -V
4
Clip Detector Voltage Referred to -V
5
6 Bootstrap Voltage Referred to -VS 100 V
9 Stand-by Voltage Referred to -VS 100 V
Mute Voltage Referred to -V
S
S
S
S
90 V
90 V
100 V
100 V
Output Peak Current 10 A
Power Dissipation T
=70°C50W
case
Operating Ambient Temperature Range 0 to 70 °C
Storage and Junction Temperature 150 °C
THERMALDATA
Symbol Description Typ Max Unit
R
th j-case
Thermal Resistance Junction-case 1 1.5 °C/W
2/13
TDA7294S
ELECTRICAL CHARACTERISTICS (Referto the TestCircuitVS= ±35V, RL=8Ω,GV= 30dB;
R
=50Ω;T
g
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
S
I
q
I
b
V
OS
I
OS
P
O
d Total Harmonic Distortion (**) P
I
MAX
SR Slew Rate 7 10 V/µs
G
V
G
V
e
N
f
L,fH
R
i
SVR Supply Voltage Rejection f = 100Hz; V
T
S
STAND-BY FUNCTION (Ref: -V
V
ST on
V
ST off
ATT
st-by
I
q st-by
MUTE FUNCTION (Ref: -V
V
Mon
V
Moff
ATT
mute
Note (*):
MUSIC POWER CONCEPT
MUSIC POWER is the maximal power which the amplifieris capableof producing acrossthe rated load resistance (regardless ofnon linearity)
1 sec afterthe application of a sinusoidal input signal of frequency 1KHz.
Note (**):
Note (***):
Tested withoptimized Application Board(see fig. 2)
Limitedby the max. allowablecurrent.
=25°C,f = 1 kHz; unless otherwise specified).
amb
Operating Supply Range ±12 ±45 V
Quiescent Current 20 30 60 mA
Input Bias Current 500 nA
Input Offset Voltage ±10 mV
Input Offset Current ±100 nA
RMS Continuous OutputPower d = 0.5%:
W
W
W
W
W
W
%
%
%
%
Music Power (RMS) (*)
∆t=1s
V
= ± 35V, RL=8Ω
S
V
=±32V, RL=6Ω
S
V
=±28V, RL=4
S
Ω
d = 10%;
R
=8Ω ;VS=±40V
L
R
=6Ω ;VS=±35V
L
R
=4Ω;VS=±30V (***)
L
= 5W; f = 1kHz
O
P
=0.1to 20W;f = 20Hzto 20kHz
O
= ±28V, RL=4Ω:
V
S
P
= 5W; f = 1kHz
O
P
=0.1to 20W;f = 20Hzto 20kHz
O
60
60
60
70
70
70
100
100
100
0.005
0.1
0.01
0.1
Overcurrent Protection Threshold 6.5 A
Open Loop Voltage Gain 80 dB
Closed Loop Voltage Gain 24 30 40 dB
Total Input Noise A = curve
f = 20Hz to 20kHz
1
25
µV
µ
Frequency Response (-3dB) PO= 1W 20Hz to 20kHz
Input Resistance 100 kΩ
= 0.5Vrms 60 75 dB
ripple
Thermal Shutdown 150 °C
or GND)
S
Stand-by on Threshold 1.5 V
Stand-by off Threshold 3.5 V
Stand-by Attenuation 70 90 dB
Quiescent Current @ Stand-by 1 3 mA
or GND)
S
Mute on Threshold 1.5 V
Mute off Threshold 3.5 V
Mute Attenuation 60 80 dB
V
3/13
TDA7294S
Figure2: Typical ApplicationP.C. Boardand ComponentLayout (scale1:1)
4/13
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