參數(shù)資料
型號(hào): TDA7491HV13TR
廠商: STMICROELECTRONICS
元件分類: 音頻/視頻放大
英文描述: 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36
封裝: ROHS COMPLIANT, SSOP-36
文件頁(yè)數(shù): 28/41頁(yè)
文件大?。?/td> 820K
代理商: TDA7491HV13TR
Application information
TDA7491HV
34/41
Doc ID 14242 Rev 4
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.
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 53. For Ci = 220 nF the high-pass filter cut-off frequency is below 20 Hz:
fc = 1 / (2 *
π * Ri * Ci)
Figure 53.
Device input circuit and frequency response
Table 8.
Gain settings
GAIN0
GAIN1
Nominal gain, Gv (dB)
0020
0126
1030
1132
Ri
Input
Ci
Rf
Input
pin
signal
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TDA7491LP13TR 5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36
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