TDA7279 15 + 15W Dual Bridge Amplifier

23 May 2019 - 0 Comments

TDA7279 Dual Bridge Amplifier

TDA7279 Pinout

The TDA7279 is a 15W + 15W Stereo dual bridge Amplifier. It is 15 Pin class AB type amplifiers and has an operating voltage from 6V to 18V. It is typically operated at 12V in portable battery powered audio applications like Radio, Bluetooth speakers etc..

Pin Configuration

Pin Number	Pin Name	Description
1	OUT1+	Channel 1- Non-Inverting Output
2	OUT1-	Channel 1 – Inverting Output
3,13	Vcc	Supply Voltage (6V to 18V)
4	IN1	Channel 1 Input
5	N.C	No Connection
6	Mute	Can be used to mute the output
7	Stand-By	Put IC on stand-by when not used to save battery charge
8	Pw-Gnd	Ground terminal of power supply
9	S-Ground	Ground terminal of audio (signal)
10	N.C	No Connection
11	N.C	No Connection
12	IN2	Channel 2 Input
14	OUT2-	Channel 2 – Inverting Output
15	OUT2+	Channel 1 – Non-Inverting Output

Features

Dual channel Class AB Amplifier
15W + 15W Stereo Output
Operating Voltage: 6V to 18V
Peak Output Current: 2A
In-built mute and stand-by function
Maximum Quiescent current: 65mA
Closed Loop Voltage gain: 33dB

Note: Complete Technical Details can be found at the TDA7279 datasheet given at the end of this page.

TDA7279 Equivalents

TDA7266, TDA7265

Alternatives Audio Amplifiers

TDA2030, TDA1554, TDA7294,

Where to use a TDA7297 amplifier?

The TDA7297 is a Class AB dual channel audio amplifier. It is available in compact 15-pin package and can operate with 6V to18V making it suitable for consumer electronics like TV, Radio, Home theater etc. Audio amplifier circuits can also be made using simple op-amps, but if you need higher volume that is loud enough for a room then this power audio amplifier is will be the best choice. This IC can deliver up to 30W (15+15) of output power, so you can run two 4Ω speakers at 15W each for stereo audio quality.

Another advantage of TDA7297 is it requires minimum external components to get it running. If you are looking for higher wattage amplifier then check out TDA7294 which can output 100W power.

How to use TDA7297?

The TDA7297 is a popular easy to use audio amplifier IC. The IC is a dual bridge amplifier, meaning it requires both left and right audio input to provide a stereo output. The output is also split into channel 1 and channel 2 each capable of driving 15W speakers. Each channel also has an inverting and non-inverting output for connecting the positive and negative terminal if the speaker. The typical application diagram is shown below.

TDA7279 Application Circuit Diagram

As you can see the IC requires only minimal number of components like few extra capacitor and resistor making it easy for designers to adapt it into compact portable applications like handheld radios or Bluetooth Speakers. Further the minimal requirement of components also reduces the BOM cost. The IC also comes in with a built-in mute function and stand-by function. The mute function eliminates the requirements of additional components while the stand-by can be used to conserver battery. Normally a microprocessor is used to control the mute and stand-by features based on the input from the user.