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PDF TDA7293V Data sheet ( Hoja de datos )
| Número de pieza | TDA7293V | |
| Descripción | 120V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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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%, RL = 8Ω, VS = ±40V)
MUTING/STAND-BY FUNCTIONS
NO SWITCH ON/OFF NOISE
VERY LOW DISTORTION
VERY LOW NOISE
SHORT CIRCUIT PROTECTION
THERMAL SHUTDOWN
CLIP DETECTOR
MODULARITY (MORE DEVICES CAN BE
EASILY CONNECTED IN PARALLEL TO
DRIVE VERY LOW IMPEDANCES)
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-
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 4Ω and 8Ω 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.
Figure 1: Typical Application and Test Circuit
VMUTE
VSTBY
C7 100nF
+Vs C6 1000µF
R3 22K
C2
22µF
R2
680Ω
IN- 2
C1 470nF
IN+ 3
R1 22K
SGND
(**)
4
+Vs
-
+
R5 10K
R4 22K
C3 10µF
MUTE 10
STBY 9
MUTE
STBY
C4 10µF
1
STBY-GND
(*) see Application note
(**) for SLAVE function
BUFFER DRIVER
7 11
+PWVs
13
14 OUT
THERMAL
SHUTDOWN
S/C
PROTECTION
BOOT
12 LOADER
C5
22µF
(*)
6
BOOTSTRAP
5
VCLIP
CLIP DET
8
-Vs
C9 100nF
15
-PWVs
C8 1000µF
-Vs
D97AU805A
December1999
1/13
1 page  
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 DECREASE INPUT
IMPEDANCE
IMPEDANCE
R2
R3 (*)
680Ω
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
22µFXN (***)
BOOTSTRAPPING
SIGNAL
DEGRADATION AT
LOW FREQUENCY
C6, C8
1000µF
SUPPLY VOLTAGE
BYPASS
C7, C9
0.1µF
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 -VS)
-VS +3V
-VS +1V
-VS
MASTER
UNDEFINED
SLAVE
D98AU821
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 3.9Ω/2W
and the capacitor is 1µF.
5/13
5 Page 
TDA7293
Figure 8a: Modular Application P.C. Board and Component Layout (scale 1:1) (Component SIDE)
Figure 8b: Modular Application P.C. Board and Component Layout (scale 1:1) (Solder SIDE)
11/13
11 Page | ||
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| PDF Descargar | [ Datasheet TDA7293V.PDF ] | |
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