TDA7493 STMicroelectronics, TDA7493 Datasheet - Page 19

• Manufacturer Part Number: TDA7493
• Description: Audio Amplifiers 3W + 3W Dual BTL Class-D 4-Select dB
• Manufacturer: STMicroelectronics

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

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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