Datasheet

BRIDGE APPLICATION
Another application suggestion is the BRIDGE
configuration, where two TDA7294 are used, as
shown by the schematic diagram of figure 25.
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 27 and 28,
measured with loads respectively 8 Ohm and 16
Ohm.
With Rl= 8 Ohm, Vs = ±25V the maximum output
power obtainable is 150 W, while with Rl=16
Ohm, Vs = ±35V the maximum Pout is 170 W.
22K0.56µF
2200µF0.22µF
TDA7294
+
-
22µF
22K
680
22K
3
1
4
137
+Vs
Vi
815
2
14
6
10
9
+
-
3
0.56µF 22K
1
4
2
14
6
22µF
22K
680
10
9
22µF
15 8
-Vs
2200µF
0.22µF
22µF
20K
10K 30K
1N4148
ST-BY/MUTE
TDA7294
137
D93AU015A
Figure 25: Bridge Application Circuit
TDA7294
13/17