參數(shù)資料
型號: TDA7491HV
廠商: 意法半導(dǎo)體
英文描述: 20 W + 20 W dual BTL class-D audio amplifier
中文描述: 20瓦20瓦的雙橋接D類音頻放大器
文件頁數(shù): 19/26頁
文件大?。?/td> 869K
代理商: TDA7491HV
TDA7491HV
Application information
19/26
7.2
Gain setting
The gain of the TDA7491HV is set by the two inputs, GAIN0 (pin 30) and GAIN1 (pin 31).
Internally, the gain is set by changing the feedback resistors of the amplifier.
Table 7.
7.3
Input resistance and capacitance
The input impedance is set by an internal resistor Ri = 60 k
(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 25
. For Ci = 220 nF the high-pass filter cut-off frequency is below 20 Hz:
fc = 1 / (2 *
π
* Ri * Ci)
Figure 25.
Device input circuit and frequency response
Gain settings
GAIN0
GAIN1
Nominal gain, G
v
(dB)
0
0
20
0
1
26
1
0
30
1
1
32
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