TDA7296_05 Datasheet, PDF (10/15 Pages) STMicroelectronics – 70V - 60W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY

TDA7296
Figure 20. Single Signal ST-BY/MUTE Control Circuit
MUTE/
ST-BY
MUTE STBY
20K
10K
30K
1N4148
10µF
10µF
D93AU014
6 BRIDGE APPLICATION
Another application suggestion is the BRIDGE configuration, where two TDA7296 are used, as shown by
the schematic diagram.
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 23 and 24, measured with loads respectively 8 Ohm and 16 Ohm.
With R_l= 8 Ohm, V_s = ±18V the maximum output power obtainable is 60W, while with R_l=16 Ohm, V_s =
±24V the maximum Pout is 60W.
Figure 21. Bridge Application Circuit
+Vs
0.22µF
Vi
2200µF
3
7
+
13 ₆
14
22µF
0.56µF
22K
-
1
22K
2
4
ST-BY/MUTE
680
10 _{9 15}
8
20K
22µF
1N4148
2200µF
10K
30K
0.56µF
22µF
22K
10 ^{9 15}
3
+
-
1
47
8
6
14
2
13
22µF
22K
680
22K
-Vs
0.22µF
D93AU015A
10/15