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TDA7492 데이터시트(PDF) 24 Page - STMicroelectronics

부품명 TDA7492
상세설명  50 W 50 W dual BTL class-D audio amplifier
PDF  32 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7492 데이터시트(HTML) 24 Page - STMicroelectronics

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Applications information
TDA7492
24/32
Doc ID 14926 Rev 5
6.2
Gain setting
The gain of the TDA7492 is set by the two inputs, GAIN0 (pin 30) and GAIN1 (pin31).
Internally, the gain is set by changing the feedback resistors of the amplifier.
6.3
Input resistance and capacitance
The input impedance is set by an internal resistor Ri = 60 k
Ω (typical). An input capacitor
(Ci) is required to couple the AC input signal.
The equivalent circuit and frequency response of the input components are shown in
Figure 31. For Ci = 470 nF the high-pass filter cutoff frequency is below 20 Hz:
fc = 1 / (2 *
π * Ri * Ci)
Figure 31.
Device input circuit and frequency response
Table 7.
Gain settings
GAIN0
GAIN1
Nominal gain, Gv (dB)
00
21.6
01
27.6
10
31.1
11
33.6
Ri
Input
Ci
Rf
Input
pin
signal



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