TDA7491LP13TR STMicroelectronics, TDA7491LP13TR Datasheet - Page 26

• Manufacturer Part Number: TDA7491LP13TR
• Description: IC AMP AUD CLASS D BTL PWRSSO36
• Manufacturer: STMicroelectronics
• Type: Class Dr

Specifications of TDA7491LP13TR

• Output Type: 2-Channel
• Max Output Power X Channels @ Load: 5W x 2 @ 8 Ohm
• Voltage - Supply: 5 V ~ 14 V
• Features: Depop, Differential Inputs, Mute, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Surface Mount
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-11056-2

Applications information
5.3
5.4
26/37
Gain setting
The gain of the TDA7491LP 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.
1. Refer to V
Input resistance and capacitance
The input impedance is set by an internal resistor Ri = 68 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 29. Device input circuit and frequency response
L
L
H
H
(1)
Voltage level on pin GAIN0
fc = 1 / (2 * π * Ri * Ci)
29. For Ci = 220 nF the high-pass filter cut-off frequency is below 20 Hz:
inL
Gain settings
and V
inH
Input
signal
in
Table 5: Electrical specifications on page 10
Doc ID 13541 Rev 5
H
H
L
H
Ci
(1)
Voltage level on pin GAIN1
Input
pin
Ri
Rf
for the drive levels for L and H
20
26
30
32
Nominal gain, G
TDA7491LP
v
(dB)