TDA7294
BRIDGE APPLICATION
- High power performances with limited supply
voltagelevel.
Another application suggestion is the BRIDGE
configuration, where two TDA7294 are used, as
shown by the schematic diagram of figure 25.
- Considerablyhigh output power even with high
load values (i.e. 16 Ohm).
In this application, the value of the load must not
be lower than 8 Ohm for dissipation and current
capability reasons.
The characteristics shown by figures 27 and 28,
measured with loads respectively 8 Ohm and 16
Ohm.
A suitable field of application includes HI-FI/TV
subwoofers realizations.
The main advantagesoffered by this solution are:
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.
Figure 25: Bridge ApplicationCircuit
+Vs
0.22µF
2200µF
7
13
6
3
22µF
Vi
+
-
14
0.56µF
22K
22K
680
1
4
2
TDA7294
ST-BY/MUTE
20K
22µF
10
9
15
8
22K
-Vs
0.22µF
2200µF
1N4148
9
15
8
10
3
10K
30K
22µF
TDA7294
6
22µF
+
-
14
0.56µF
22K
22K
680
1
4
2
7
13
D93AU015A
13/16
STMICROELECTRONICS [ ST ]
