TDA7294 - Datasheet Catalog
TDA7294 - Datasheet Catalog
TDA7294 - Datasheet Catalog
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<strong>TDA7294</strong><br />
BRIDGE APPLICATION<br />
Another application suggestion is the BRIDGE<br />
configuration, where two <strong>TDA7294</strong> are used, as<br />
shown by the schematic diagram of figure 25.<br />
In this application, the value of the load must not<br />
be lower than 8 Ohm for dissipation and current<br />
capability reasons.<br />
A suitable field of application includes HI-FI/TV<br />
subwoofers realizations.<br />
The main advantages offered by this solution are:<br />
- High power performances with limited supply<br />
voltage level.<br />
- Considerably high output power even with high<br />
load values (i.e. 16 Ohm).<br />
The characteristics shown by figures 27 and 28,<br />
measured with loads respectively 8 Ohm and 16<br />
Ohm.<br />
With Rl= 8 Ohm, Vs = ±25V the maximum output<br />
power obtainable is 150 W, while with Rl=16<br />
Ohm, Vs = ±35V the maximum Pout is 170 W.<br />
Figure 25: Bridge Application Circuit<br />
+Vs<br />
Vi<br />
0.22µF<br />
2200µF<br />
3<br />
7<br />
+<br />
13<br />
6<br />
14<br />
22µF<br />
0.56µF<br />
22K<br />
1<br />
-<br />
2<br />
22K<br />
ST-BY/MUTE<br />
4<br />
<strong>TDA7294</strong><br />
15 8<br />
680<br />
20K<br />
10 9<br />
+<br />
22µF<br />
1N4148<br />
22K<br />
-Vs<br />
2200µF 0.22µF<br />
10K<br />
30K<br />
22µF<br />
10 9 15 8<br />
3<br />
<strong>TDA7294</strong><br />
6<br />
14<br />
22µF<br />
0.56µF<br />
22K<br />
1<br />
-<br />
2<br />
22K<br />
4<br />
7<br />
13<br />
680<br />
D93AU015A<br />
13/17
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