Datasheet

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 8
Ω
;
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
1µF
ST-BY/
MUTE
1µF
R5 4.7Ω
R6
4.7Ω
C7
0.1µF
C9
0.1µF
C5
0.1µF
C4
1000µF
+V
S
35
7
9
6
11
2
4+
+
-
-
D94AU190
RL
R2
560Ω
R1
36KΩ
8
10
1
R4
560Ω
R3
36KΩ
C1
IN
C2
C3
0.1µF
C6
1000µF
-V
S
C8
5.6nF
Figure 18: Bridge Application Circuit
TDA7265
9/11