TDA7493 STMicroelectronics, TDA7493 Datasheet - Page 12
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TDA7493
Manufacturer Part Number
TDA7493
Description
Audio Amplifiers 3W + 3W Dual BTL Class-D 4-Select dB
Manufacturer
STMicroelectronics
Datasheet
1.TDA7493.pdf
(30 pages)
Specifications of TDA7493
Amplifier Class
D
No. Of Channels
2
Output Power
3W
Supply Voltage Range
3V To 5.5V
Thd + N
0.05% @ 0.5W, 4ohm, VCC=5V
Load Impedance
4ohm
Operating Temperature Range
0°C To +70°C
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TDA7493-13TR
Manufacturer:
ST
Quantity:
20 000
Company:
Part Number:
TDA749313TR
Manufacturer:
MXIC
Quantity:
1 101
Application information
5.3
12/30
Input resistance and capacitance
The input impedance is set by an internal resistor, Ri, of value 60 kΩ. An input coupling
capacitor (Ci) is required on each input line. These two components together form a
high-pass filter whose cutoff frequency is:
Figure 4.
The value of Ci is chosen depending on the application and the speaker system. For a
cut-off frequency less than 20 Hz, the input capacitors could be 470 nF each.
If a polarized capacitor is used, it is important to connect the positive side of the capacitor to
the terminal with higher DC voltage. The DC voltage on the input pins is V
Figure 5.
f
C
= 1 / (2 * π * Ri * Ci)
Input signal
Input high-pass RC filter
Device input structure
Ci
Ci
Doc ID 14570 Rev 5
Ri
Ri
+
-
Rf
Rf
CC
/ 2.
TDA7493