TDA7294_07 Datasheet, PDF (1/17 Pages) STMicroelectronics – 100V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY

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TDA7294
100V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY
VERY HIGH OPERATING VOLTAGE RANGE
(±40V)
DMOS POWER STAGE
HIGH OUTPUT POWER (UP TO 100W MU-
SIC 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 TDA7294 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
Multiwatt15V
Multiwatt15H
ORDERING NUMBERS:
TDA7294V
TDA7294HS
to the high out current capability it is able to sup-
ply the highest power into both 4Ω and 8Ω loads
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
C7 100nF
+Vs C6 1000µF
R3 22K
C2
22µF
R2
680Ω
IN- 2
C1 470nF
IN+ 3
R1 22K
IN+MUTE 4
R5 10K MUTE 10
MUTE
STBY 9
STBY
R4 22K
1
+Vs
7
-
+PWVs
13
14 OUT
+
C5
22µF
6
BOOT-
STRAP
THERMAL
SHUTDOWN
8
S/C
PROTECTION
15
C3 10µF
C4 10µF
STBY-GND
-Vs
C9 100nF
-PWVs
C8 1000µF
D93AU011
-Vs
Note: The Boucherot cell R6, C10, normally not necessary for a stable operation it could
be needed in presence of particular load impedances at V_S <±25V.
R6
2.7Ω
C10
100nF
April 2003
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