BRIDGE APPLICATION

Another application suggestion is the BRIDGE

configuration, where two TDA7296A are used, as

shown by the schematic diagram of figure 19.

In this application, the value of the load must not

be lower than 8 Ohm for dissipation and current

capability reasons.

A suitable field of application includes HI-FI/TV

subwoofers realizations.

The main advantages offered by this solution are:

- High power performances with limited supply

voltage level.

- Considerably high output power even with high

load values (i.e. 16 Ohm).

The characteristics shown by figures 21 and 22,

measured with loads respectively 8 Ohm and 16

Ohm.

With Rl= 8 Ohm, Vs =

±18V the maximum output

power obtainable is 60W, while with Rl=16 Ohm,

Vs =

±24V the maximum Pout is 60W.

22K

0.56

µF

2200

µF

0.22

µF

+

-

22

µF

22K

680

22K

3

1

4

13

7

+Vs

Vi

8

15

2

14

6

10

9

+

-

3

0.56

µF

22K

1

4

2

14

6

22

µF

22K

680

10

9

22

µF

15

8

-Vs

2200

µF

0.22

µF

22

µF

20K

10K

30K

1N4148

ST-BY/MUTE

13

7

D96AU497

Figure 19: Bridge Application Circuit

4) Clipping Detector Output

The TDA7296A is equipped with an internal cir-

cuit able to detect the output stage saturation pro-

viding a proper current sinking into on open col-

lector output (pin 5) when a certain distortion level

is reached at output.

This particular function allows gain compression

facility whenever the amplifier is overdriven, thus

obtaining high quality sound all listening levels.

OUTPUT

SIGNAL

t

S96AU498

Figure 18: Clipping Detector Output Waveform

TDA7296A

10/13