TS4990IST STMicroelectronics, TS4990IST Datasheet - Page 23

• Manufacturer Part Number: TS4990IST
• Description: IC AMP AUDIO PWR 1.2W MONO 8MSOP
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TS4990IST

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 1.2W x 1 @ 8 Ohm
• Voltage - Supply: 2.2 V ~ 5.5 V
• Features: Depop, Differential Inputs, Standby, Thermal Protection
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• For Use With: 497-6383 - BOARD DEMO FOR TS4990
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-4451-2

TS4990
Note:
Figure 64. Differential input amplifier configuration
The input capacitor C
frequency required. (F
This formula is true only if:
is 5 times lower than F
Example bill of materials
The bill of materials in
and a -3 dB lower cut-off frequency of about 80 Hz.
Table 7.
Neg. Input
Pos. Input
Pin name
C
b
F
C
U1
R
R
=C
Bill of materials for differential input amplifier application
CB
in
Standby
Control
1
2
Cin
Cin
s
=
----------------------------------------
2π R
R1
R1
(
in
L
L
Table 7
R2
Cb
1
can be calculated by the following formula using the -3 dB lower
.
is the lower frequency required).
+
1
R
2
)C
is for the example of a differential amplifier with a gain of 2
B
Vin-
Vin+
Bypass
Standby
R2
C
(Hz)
in
≈
-
+
-------------------- -
2πR
Bias
1
1
F
L
Functional description
Vcc
(F)
20k / 1%
20k / 1%
TS4990
100nF
1µF
-
+
AV = -1
Application information
TS4990
Vout 1
Vout 2
Speaker
8 Ohms
23/32
Cs