TDA7491P STMicroelectronics, TDA7491P Datasheet - Page 33

• Manufacturer Part Number: TDA7491P
• Description: IC, AMP, AUDIO, CLASS D, 36POWERSO
• Manufacturer: STMicroelectronics

Specifications of TDA7491P

• Amplifier Class: D
• No. Of Channels: 2
• Output Power: 10W
• Supply Voltage Range: 5V To 18V
• Thd + N: 0.1% @ 1W, 6ohm, VCC=11V
• Load Impedance: 8ohm
• Operating Temperature Range: 0°C To +70°C
• Rohs Compliant: Yes

TDA7491P
7.2
7.3
Gain setting
The gain of the TDA7491P 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 8.
Input resistance and capacitance
The input impedance is set by an internal resistor Ri = 60 kΩ (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
Figure 52. Device input circuit and frequency response
0
0
1
1
fc = 1 / (2 * π * Ri * Ci)
52. For Ci = 220 nF the high-pass filter cut-off frequency is below 20 Hz:
GAIN0
Gain settings
Input
signal
Doc ID 13540 Rev 4
0
1
0
1
Ci
Input
pin
GAIN1
Ri
Rf
20
26
30
32
Applications information
Nominal gain, G
v
(dB)
33/40