Datasheet

Typical application schematics TS4990
4/33 Doc ID 9309 Rev 13
2 Typical application schematics
Figure 1. Typical application schematics
Table 3. Component descriptions
Component Functional description
R
in
Inverting input resistor that sets the closed loop gain in conjunction with R
feed
. This
resistor also forms a high pass filter with C
in
(F
c
= 1 / (2 x Pi x R
in
x C
in
)).
C
in
Input coupling capacitor that blocks the DC voltage at the amplifier input terminal.
R
feed
Feed back resistor that sets the closed loop gain in conjunction with R
in
.
C
s
Supply bypass capacitor that provides power supply filtering.
C
b
Bypass pin capacitor that provides half supply filtering.
C
feed
Low pass filter capacitor allowing to cut the high frequency (low pass filter cut-off
frequency 1/ (2 x Pi x R
feed
x C
feed
)).
A
V
Closed loop gain in BTL configuration = 2 x (R
feed
/ R
in
).
Exposed pad
DFN8 exposed pad is electrically connected to pin 7. See DFN8 package
information on page 29 for more information.
Rfeed
Rin
Audio In
Cfeed Vcc
Cin
+
Cs
+
Cb
Standby
Control
Speaker
8Ohms
Bias
AV = -1
Vin-
Vin+
Bypass
Standby
VCC
GND
Vout 1
Vout 2
+
-
+
-
TS4990