TDA7294S 查看數據表（PDF） - STMicroelectronics

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TDA7294S

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

STMicroelectronics 

TDA7294S

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

1 Features

■ VERY HIGH OPERATING VOLTAGE RANGE

(± 45V)

■ MULTIPOWER BCD TECHNOLOGY

■ DMOS POWER STAGE

■ HIGH OUTPUT POWER (100W @ THD = 10%,

RL = 8Ω, VS = ±40V (MUSIC POWER)

■ MUTING/STAND-BY FUNCTIONS

■ NO SWITCH ON/OFF NOISE

■ VERY LOW DISTORTION

■ VERY LOW NOISE

■ SHORT CIRCUIT PROTECTED (WITH NO

INPUT SIGNAL APPLIED)

■ THERMAL SHUTDOWN

■ CLIP DETECTOR

■ MODULARITY (MORE DEVICES CAN BE

EASILY CONNECTED IN PARALLEL TO

DRIVE VERY LOW IMPEDANCES)

2 Description

The TDA7294S is a monolithic integrated circuit in

Multiwatt15 package, intended for use as audio

Figure 1. Package

Multiwatt15 (Vertical)

Table 1. Order Codes

Part Number

TDA7294S

Package

Multiwatt15 (Vertical)

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 supply 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.

Figure 2. Typical Application and Test Circuit

C7 100nF

+Vs C6 1000µF

VMUTE

VSTBY

R3 22K

C2

22µF

R2

680Ω

IN- 2

C1 470nF

IN+ 3

R1 22K

SGND 4

(**)

+Vs

-

+

R5 10K

R4 22K

C3 10µF

MUTE 10

STBY 9

MUTE

STBY

C4 10µF

1

STBY-GND

(*) see Application note

(**) for SLAVE function

BUFFER DRIVER

7

11

+PWVs

13

14 OUT

THERMAL

SHUTDOWN

S/C

PROTECTION

BOOT

12 LOADER

C5

22µF

(*)

6

BOOTSTRAP

5

VCLIP

CLIP DET

8

-Vs

C9 100nF

15

-PWVs

C8 1000µF

-Vs

D97AU805A

February 2005

Rev. 2

1/16

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