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TDA7294 100V-100W DMOS Audio Amplifier

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Pin Configuration

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

 

Features

  • Very High Operating Voltage Range of ±40V
  • DMOS Power Stage
  • High Output Power (Up To 100W Music Power)
  • Muting/Stand-By Functions
  • No Switch On/Off Noise
  • No Boucherot Cells
  • Very Low Distortion
  • Very Low Noise
  • Short Circuit Protection
  • Thermal Shutdown

 

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 Equivalent

NTE7165

 

TDA7294 Alternative

TDA7293, TDA7295, LM3886

 

Brief Description about TDA7294

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 supply the highest power into both 4W and 8W 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.

The TDA7294 is a monolithic MOS power amplifier which can be operated at 80V supply voltage (100V with no signal applied) while delivering output currents up to ±10 A. The metal tab of the TDA7294 is connected to the -Vs pin internally.

 

Where to Use TDA7294?

TDA7294 can be used in circuits requiring High power and high Efficiency amplification applications.

 

How to use TDA7294?

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 determines the stand by ON/OFF time duration. The R5=10k Ω and C3=10µF are used for deciding the mute time constant. The input DC

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 Applications 

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

 

2D Model (Multiwatt15V)

TDA7294 2D Model