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

to the high out current capability it is able to sup-

ply the highest power into both 4

Ω 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.

April 2003

®

IN-

2

R2

680

Ω

C2

22

µF

C1 470nF

IN+

R1 22K

R6

2.7

Ω

C10

100nF

3

R3 22K

-

+

MUTE

STBY

4

VM

VSTBY

10

9

IN+MUTE

MUTE

STBY

R4 22K

THERMAL

SHUTDOWN

S/C

PROTECTION

R5 10K

C3 10

µF

C4 10

µF

1

STBY-GND

C5

22

µF

713

14

6

15

8

-Vs

-PWVs

BOOT-

STRAP

OUT

+PWVs

+Vs

C9 100nF

C8 1000

µF

-Vs

D93AU011

+Vs

C7 100nF

C6 1000

µF

Note: The Boucherot cell R6, C10, normally not necessary for a stable operation it could

Figure 1: Typical Application and Test Circuit

MULTIPOWER BCD TECHNOLOGY

Multiwatt15V

Multiwatt15H

ORDERING NUMBERS:

TDA7294V

TDA7294HS

1/17