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PDF TDA7295 Data sheet ( Hoja de datos )

Número de pieza TDA7295
Descripción 80V - 80W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY
Fabricantes ST Microelectronics 
Logotipo ST Microelectronics Logotipo



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No Preview Available ! TDA7295 Hoja de datos, Descripción, Manual

® TDA7295
80V - 80W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY
VERY HIGH OPERATING VOLTAGE RANGE
(±40V)
DMOS POWER STAGE
HIGH OUTPUT POWER (UP TO 80W MUSIC
POWER)
MUTING/STAND-BY FUNCTIONS
NO SWITCH ON/OFF NOISE
NO BOUCHEROT CELLS
VERY LOW DISTORTION
VERY LOW NOISE
SHORT CIRCUIT PROTECTION
THERMAL SHUTDOWN
DESCRIPTION
The TDA7295 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-
class TV). Thanks to the wide voltage range and
Figure 1: Typical Application and Test Circuit
MULTIPOWER BCD TECHNOLOGY
Multiwatt 15
ORDERING NUMBER: TDA7295V
to the high out current capability it is able to sup-
ply the highest power into both 4and 8loads
even in presence of poor supply regulation, with
high Supply Voltage Rejection.
The built in muting function with turn on delay
simplifies the remote operation avoiding switching
on-off noises.
VM
VSTBY
R3 22K
C2
22µF
R2
680
IN- 2
C1 470nF
IN+ 3
R1 22K
IN+MUTE
4
C7 100nF
+Vs
7
-
+
+Vs C6 1000µF
+PWVs
13
14 OUT
C5
22µF
6
BOOTSTRAP
R5 10K
R4 22K
C3 10µF
MUTE 10
MUTE
STBY 9
STBY
1
C4 10µF
STBY-GND
THERMAL
SHUTDOWN
8
-Vs
S/C
PROTECTION
15
-PWVs
C9 100nF
-Vs
C8 1000µF
D93AU011
July 1999
1/13

1 page




TDA7295 pdf
TDA7295
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 DECREASE INPUT
IMPRDANCE
IMPEDANCE
R2
R3 (*)
680
22k
CLOSED LOOP GAIN DECREASE OF GAIN INCREASE OF GAIN
SET TO 30dB (**)
INCREASE OF GAIN DECREASE OF GAIN
R4
22k
ST-BY TIME
LARGER ST-BY
SMALLER ST-BY
CONSTANT
ON/OFF TIME
ON/OFF TIME;
POP NOISE
R5
10k
MUTE TIME
LARGER MUTE
SMALLER MUTE
CONSTANT
ON/OFF TIME
ON/OFF TIME
C1
0.47µF
INPUT DC
DECOUPLING
HIGHER LOW
FREQUENCY
CUTOFF
C2
22µF
FEEDBACK DC
DECOUPLING
HIGHER LOW
FREQUENCY
CUTOFF
C3
10µF
MUTE TIME
LARGER MUTE
SMALLER MUTE
CONSTANT
ON/OFF TIME
ON/OFF TIME
C4
10µF
ST-BY TIME
LARGER ST-BY
SMALLER ST-BY
CONSTANT
ON/OFF TIME
ON/OFF TIME;
POP NOISE
C5
22µF
BOOTSTRAPPING
SIGNAL
DEGRADATION AT
LOW FREQUENCY
C6, C8
1000µF
SUPPLY VOLTAGE
BYPASS
DANGER OF
OSCILLATION
C7, C9
0.1µF
SUPPLY VOLTAGE
BYPASS
DANGER OF
OSCILLATION
(*) R1 = R3 FOR POP OPTIMIZATION
(**) CLOSED LOOP GAIN HAS TO BE 24dB
5/13

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TDA7295 arduino
Figure 19: Frequency Response of the Bridge
Application
TDA7295
Figure 20: Distortion vs. Output Power
Figure 21: Distortion vs. Output Power
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