TDA7296S Datasheet, PDF (7/11 Pages) STMicroelectronics – 60V - 60W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY

Figure 4: Turn ON/OFF Suggested Sequence
+Vs
(V)
+40
TDA7296S
-40
-Vs
VIN
(mV)
VST-BY
PIN #9
5V
(V)
VMUTE
5V
PIN #10
(V)
IQ
(mA)
VOUT
(V)
OFF
ST-BY
MUTE
PLAY
above, the device features a thermal shutdown
circuit which initially puts the device into a muting
state (@ Tj = 150 ^oC) and then into stand-by (@
Tj = 160 ^oC).
Full protection against electrostatic discharges on
every pin is included.
Figure 5: Single Signal ST-BY/MUTE Control
Circuit
MUTE/
ST-BY
MUTE STBY
20K
10K
30K
1N4148
10µF
10µF
D93AU014
3) Other Features
The device is provided with both stand-by and
mute functions, independently driven by two
CMOS logic compatible input pins.
The circuits dedicated to the switching on and off
of the amplifier have been carefully optimized to
ST-BY
OFF
MUTE
D98AU817
avoid any kind of uncontrolled audible transient at
the output.
The sequence that we recommend during the
ON/OFF transients is shown by Figure 4.
The application of figure 5 shows the possibility of
using only one command for both st-by and mute
functions. On both the pins, the maximum appli-
cable range corresponds to the operating supply
voltage.
APPLICATION INFORMATION
BRIDGE APPLICATION
Another application suggestion is the BRIDGE
configuration, where two TDA7296S are used.
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).
With Rl= 8 Ohm, Vs = ±23V the maximum output
power obtainable is 120W (Music Power)
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