TDA7294_07 Datasheet, PDF (13/17 Pages) STMicroelectronics – 100V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY

TDA7294
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.
Figure 25: Bridge Application Circuit
+Vs
0.22µF
Vi
2200µF
3
7
+
13 ₆
14
22µF
0.56µF
22K
-
1
22K
2
ST-BY/MUTE
4
TDA7294
680
10 _{9 15}
8
20K
22µF
1N4148
2200µF
10K
30K
0.56µF
22µF
22K
10 ^{9 15}
8
TDA7294
6
3
+
14
-
1
2
47
13
22µF
22K
680
22K
-Vs
0.22µF
D93AU015A
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