TDA7297 STMicroelectronics, TDA7297 Datasheet - Page 3

IC AMP AUDIO 15W AB MULTIWATT15

TDA7297

Manufacturer Part Number
TDA7297
Description
IC AMP AUDIO 15W AB MULTIWATT15
Manufacturer
STMicroelectronics
Type
Class ABr
Datasheet

Specifications of TDA7297

Output Type
2-Channel (Stereo)
Max Output Power X Channels @ Load
15W x 2 @ 8 Ohm
Voltage - Supply
6.5 V ~ 18 V
Features
Mute, Short-Circuit and Thermal Protection, Standby
Mounting Type
Through Hole
Package / Case
Multiwatt-15 (Vertical, Bent and Staggered Leads)
Amplifier Class
AB
No. Of Channels
2
Output Power
15W
Supply Voltage Range
6.5V To 18V
Thd + N
0.1% @ 1W, 8ohm, VS=16.5V
Load Impedance
8ohm
Operating Temperature Range
0°C To +70°C
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-3967-5

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ELECTRICAL CHARACTERISTICS (Continued)
APPLICATION SUGGESTION
STAND-BY AND MUTE FUNCTIONS
(A) Microprocessor Application
In order to avoid annoying "Pop-Noise" during
Turn-On/Off transients, it is necessary to guaran-
tee the right St-by and mute signals sequence.
It is quite simple to obtain this function using a mi-
croprocessor (Fig. 1 and 2).
At first St-by signal (from mP) goes high and the
voltage across the St-by terminal (Pin 7) starts to
increase exponentially. The external RC network
is intended to turn-on slowly the biasing circuits of
Figure 1: Microprocessor Application
Symbol
VT
VT
I
ST-BY
e
ST-BY
MUTE
N
P
Mute Threshold
St-by Threshold
ST-BY current V6 = GND
Total Output Noise Voltage
ST-BY
MUTE
IN1
IN2
Parameter
R1 10K
R2 10K
10 F
1 F
C2
C4
C1 0.22 F
C3 0.22 F
PW-GND
S-GND
4
7
9
12
6
8
Vref
V
A curve
f = 20Hz to 20kHz
O
= -30dB
Test Condition
the amplifier, this to avoid "POP" and "CLICK" on
the outputs.
When this voltage reaches the St-by threshold
level, the amplifier is switched-on and the external
capacitors in series to the input terminals (C3,
C5) start to charge.
It’s necessary to mantain the mute signal low until
the capacitors are fully charged, this to avoid that
the device goes in play mode causing a loud "Pop
Noise" on the speakers.
A delay of 100-200ms between St-by and mute
signals is suitable for a proper operation.
+
+
+
+
-
-
-
-
3
V CC
13
15
14
1
2
Min.
2.3
0.8
OUT1+
OUT1-
OUT2+
OUT2-
Typ.
150
220
2.9
1.3
D95AU258A
470 F
C5
Max.
100
500
4.1
1.8
TDA7297
100nF
C6
Unit
V
V
A
V
V
3/9

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