BRIDGE APPLICATION

Another application suggestion concerns the

BRIDGE configuration, where the two power am-

plifiers are connected as shown by the schematic

diagram of figure. 18.

This application shows, however, some operative

limits due to dissipation and current capability of

the output stage. For this reason, we reccomend

to use the TDA7265 in bridge with the supply volt-

age equal/lower than

±16V when the load is 8Ω;

with higher loads (i.e.16

Ω), the amplifier can work

correctly in the whole supply voltage range.

The detected characteristics of T.H.D. vs Pout

and Frequency Response are shown in fig.19 and

fig.20.

With R1=8

Ω, Vs=+/-16V the maximum output

power obtainable is 50W at T.D.H.=10%.

The quiescent current remains unchanged with

respect to the stereo configuration (~80mA as

typical at Vs=+/-16V).

The last point to take into consideration concerns

the short-circuit protection. As for the stereo appli-

cation, the TDA7265 is fully protected against any

kind of short-circuit ( between Out/Gnd, Out/+Vs

and Out/-Vs).

Figure 19: Distortion vs. Output Power

Figure 20: Frequency Response of the Bridge Ap-

plications

1

µF

ST-BY/

MUTE

1

µF

R5 4.7

Ω

R6

4.7

Ω

C7

0.1

µF

C9

0.1

µF

C5

0.1

µF

C4

1000

µF

+VS

3

5

7

9

6

11

2

4

+

+

-

-

D94AU190

RL

R2

560

Ω

R1

36K

Ω

8

10

1

R4

560

Ω

R3

36K

Ω

C1

IN

C2

C3

0.1

µF

C6

1000

µF

-VS

C8

5.6nF

Figure 18: Bridge Application Circuit

TDA7265

9/11