TDA7493 STMicroelectronics, TDA7493 Datasheet - Page 19
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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
TDA7493
The disadvantages of the anti-pop configuration are given below:
If the pop noise is not critical, the anti-pop configuration can be simplified as shown in
Figure
Figure 14. Simple anti-pop configuration for single-ended input application
The input impedance or the load of audio source is no longer 2 * Rin as in the case of
differential input configuration but R0. It means the load effect should be considered
during the application design. At this point, bigger R0 is better because of the lower
load effect.
The input signal is also equivalent to
V
the original V
When Rin = 30 k
When Rin = 30 k
this case, smaller R0 is better.
in_actual
14. The suggested value of the resistor R0 is 20 k
= V
in
in
* 2 * Rin * (Rin + Rfb + R0) / (2 * Rin * (Rin + Rfb + R0) + Rfb * R0), not
which means the actual gain is reduced.
Ω
Ω
, Rfb = 30 k
, Rfb = 120 k
GND
OUTP
Doc ID 14570 Rev 5
R0
Ω
Ω
and R0 = 20 k
and R0 = 20 k
Cin
Cin
INN
INP
Ω
Ω
, the gain is reduced by 1 dB.
, the gain is reduced by 1.84 dB. In
Ω
.
Rin
Rin
TDA7493
Input stage
Application information
+
Rfb
Rfb
-
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