TDA7294 The TDA7294 is a monolithic integrated circuit in Application Circuit

STMicroelectronics

find TDA7294 datasheet
TDA7294 circuit
®
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:
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.
C7 100nF
R3 22K
C2
22µF
+Vs
R2
680Ω
C1 470nF
IN-
2
7
-
+Vs
C6 1000µF
+PWVs
13
14
OUT
C5
22µF
6
BOOT-
STRAP
R6
2.7Ω
C10
100nF
IN+
3
+
R1 22K
IN+MUTE
R5 10K
MUTE
STBY
R4 22K
C3 10µF
C4 10µF
4
10
9
VM
VSTBY
MUTE
STBY
1
STBY-GND
8
THERMAL
SHUTDOWN
S/C
PROTECTION
15
-PWVs
C8 1000µF
D93AU011
-Vs
C9 100nF
-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.
April 2003
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