TDA7294 Ver la hoja de datos (PDF) - STMicroelectronics

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TDA7294

100V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY

STMicroelectronics 

®

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 VS <±25V.

R6

2.7Ω

C10

100nF

April 2003

1/17

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