Features; Description; Multipower Bcd Technology; Typical Application And Test Circuit - Onkyo HTP-420 Service Manual

®
120V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY
VERY HIGH OPERATING VOLTAGE RANGE
(±50V)
DMOS POWER STAGE
HIGH OUTPUT POWER (100W @ THD =
= ±40V)
10%, R = 8Ω, V
L S
MUTING/STAND-BY FUNCTIONS
NO SWITCH ON/OFF NOISE
VERY LOW DISTORTION
VERY LOW NOISE
SHORT CIRCUIT PROTECTED (WITH NO IN-
PUT SIGNAL APPLIED)
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-
Figure 1: Typical Application and Test Circuit
C2
22µF
R1 22K
VMUTE R5 10K
VSTBY
R4 22K
C3 10µF
January 2003
R3 22K
R2
680Ω IN- 2
C1 470nF
IN+ 3
SGND 4
(**)
MUTE 10
MUTE
STBY 9
STBY
1
STBY-GND
C4 10µF
(*) see Application note
(**) for SLAVE function

MULTIPOWER BCD TECHNOLOGY

Multiwatt15V
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.
+Vs
C7 100nF
BUFFER DRIVER
+Vs
7 11
-
+
THERMAL
SHUTDOWN PROTECTION
8 15
-Vs -PWVs
C9 100nF
-Vs
TDA7293
Multiwatt15H
ORDERING NUMBERS:
TDA7293HS
C6 1000µF
+PWVs
13
14 OUT
BOOT
12
LOADER
C5
22µF
6
BOOTSTRAP
5
S/C
CLIP DET
C8 1000µF
D97AU805A
(*)
VCLIP
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