Home  Product Technical Articles   TDA7294: 100W Audio Amplifier IC [Video]

TDA7294: 100W Audio Amplifier IC [Video]

Author: Mia
Date: 11 Mar 2022
 12302
tda7294 datasheet

Ordering & Quality

Photo Mfr. Part # Company Description Package PDF Qty Pricing
(USD)
TDA7294 TDA7294 Company:STMicroelectronics Remark:Audio Amp Speaker 1-CH Mono 100W Class-AB 15-Pin(Tab) MULTIWATT V Package:ZIP-15
N/A
In Stock:On Order
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Price:
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TDA7294HS TDA7294HS Company:STMicroelectronics Remark:IC AMP AB MONO 100W 15MULTIWATT Package:15-Multiwatt
DataSheet
In Stock:570
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Price:
1+: $5.61000
10+: $5.03800
25+: $4.76320
100+: $3.91650
250+: $3.51424
500+: $3.38720
1000+: $2.81561
2500+: $2.70976
5000+: $2.62508
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TDA7294S TDA7294S Company:STMicroelectronics Remark:Amplifier IC 1-Channel (Mono) Class AB 15-Multiwatt Package:Multiwatt-15 (Vertical, Bent and Staggered Leads)
DataSheet
In Stock:On Order
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TDA7294V TDA7294V Company:STMicroelectronics Remark:IC AMP AB MONO 100W 15MULTIWATT Package:15-Multiwatt
DataSheet
In Stock:57
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Price:
1+: $3.18000
10+: $2.85600
25+: $2.69960
100+: $2.21980
250+: $1.99184
500+: $1.91984
1000+: $1.59587
2500+: $1.53587
5000+: $1.48788
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TDA7294 Introduction

The TDA7294  is a monolithic integrated circuit in the Multiwatt15  package, intended for use as an audio class AB amplifier in  Hi-Fi field applications  (Home Stereo, self-powered loudspeakers, Topclass 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 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.

tda7294

                                                           

                                                               This is a build and evaluation of the TDA7294 100 watt audio amplifier I.C.


Catalog

TDA7294 Introduction

TDA7294 Features

TDA7294 Pin Configuration and Functions

TDA7294 Block Diagram

TDA7294 Package Outline

TDA7294 Alternatives

Where and How to use TDA7294

TDA7294 Electrical Specifications

TDA7294 Applications

Difference Between TDA7294 and TDA7293

Product Manufacturer

Component Datasheet

FAQ

Ordering & Quantity


TDA7294 Features

  • Very high operating voltage range  (±40V)
  • DMOS power stage
  • High output power(up to 100w music power)
  • Muting/stand-by functions
  • No switch on/off noise
  • No Boucheron cells
  • Very low distortion
  • Very low noise
  • Short circuit protection
  • Thermal shutdown

TDA7294 Pin Configuration and Functions

tda7294 pinout

Pin functions:

Pin No.

Pin Name

Pin Description

1

Stand-By GND

Stand-By GND, output gets connected to ground

2

Inverting input

The Inverting input

3

Non-Inverting input

The Non-Inverting input

4

SVR

Supply Voltage Rejection used for power supply ripple or noise rejection

5

N.C.

Not connected

6

Bootstrap

Used to step-up charge

7

+Vs Supply

Positive supply

8

-Vs Supply

Negative supply

9

Stand-by

Standby control pin used for low power mode, output runs in low current mode

10

Mute

Audio is disabled of the output

11

N.C.

Not connected

12

N.C.

Not connected

13

+Vs Power

Positive power supply

14

Out

Output pin

15

-Vs Power

Negative power supply


TDA7294 Block Diagram

tda7294 block diagram


TDA7294 Package Outline

  • Multiwatt15 V package information

TDA7294 Multiwatt15 V package

Mechanical Data:

  • Multiwatt15 H package information

TDA7294 Multiwatt15 H package informationMechanical Data:

 


TDA7294 Alternatives

TDA7293, TDA7295, LM3886


Where and How to Use TDA7294

TDA7294 can be used in circuits requiring high power and high-efficiency amplification applications.

R1 is the input resistance and its recommended value is 22k Ω. R2=680 Ω and R3= 22k Ω decides the loop gain of the amplifier. The R4=22k Ω and C4=10µF determine the stand by ON/OFF time duration. The R5=10k Ω and C3=10µF are used for deciding the mute time constant. Decoupling used is C1=0.47µF. C2=22mF is the feedback DC. C5=22mF Bootstrapping. C6, C8=1000mF and C7, C9 0.1mF are used for supply voltage bypass.

how to use tda7294


TDA7294 Electrical Specifications

  • Maximum VS Supply Voltage (No Signal) ±50 V
  • Maximum IO Output Peak Current 10 A
  • Maximum Top Operating Ambient Temperature Range 0 to 70 °C
  • Maximum Tstg, Tj Storage and Junction Temperature 150 °C
  • VS Supply Range is minimum ±10 V and maximum value ±40 V
  • Open-Loop Voltage Gain 80 dB
  • Closed-Loop Voltage Gain minimum 24 dB, typically 30 dB and maximum 40 dB
  • Ib Input Bias Current 500 nA

TDA7294 Applications

  • HI-FI
  • CAR-RADIO
  • Bridge Application Circuit
  • An audio class AB amplifier
  • Stereos system
  • Subwoofer

Differences Between TDA7294 and TDA7293

tda7293

Features of TDA7293

  • Multipower BCD technology
  • Very high operating voltage range (±50 V)
  • DMOS power stage
  • High output power (100 W into 8 Ω @ THD =10%, with VS = ±40 V)
  • Muting and 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 (several devices can easily be connected in parallel to drive very low impedances)

Both these audio chips use DMOS or double-diffused metal–oxide–semiconductor output stages.  Supply rails are +/- 60V DC max for the TDA7293 and +/-50V DC for the TDA7294, transformer supply rails AC 32V- 0-32V to 35V-0-35V, recommendation is  32V-0-32V for 8 ohm operation.

 

The conversion rate value of TDA7293 is also 10V/us, but it has a wider voltage supply range, and the highest available dual 50V DC power supply, which means that it has a larger dynamic range and higher output power than TDA7294,  In dual 40V DC power supply, an average output power of 100W can be achieved at 8-ohm load. Of course, if the voltage is increased to double 50V, or a smaller load such as 4 ohms, there will be greater output power, according to the characteristics of TDA7293. When selecting a transformer, a dual 28V AC voltage can be selected, so the voltage after rectification and filtering is about 40V, of course, the voltage can also be increased. Considering that there is a fluctuation in the grid voltage, it is best to be less than the maximum voltage of 50V, so that the circuit can work in a more stable condition.


Product Manufacturer

STMicroelectronics (ST) group was established in June 1988 as a result of the merger of SGS Microelectronics of Italy and Thomson Of France. In May 1998 SGS-Thomson Microelectronics changed its name to STMicroelectronics Limited.

It is the world's largest manufacturer of dedicated analog chips and power conversion chips, the world's largest supplier of industrial semiconductors and set-top box chips, and a world leader in discrete components, mobile phone camera modules, and automotive integrated circuits.


Component Datasheet

TDA7294 Datasheet


FAQ

 

What is the TDA7294?

A monolithic integrated circuit in Multiwatt15 package.

 

Where to Use TDA7294?

TDA7294 can be used in circuits requiring high power and high-efficiency amplification applications.

 

What is the conversion rate value of TDA7293?

10V/us

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