TS4990IST STMicroelectronics, TS4990IST Datasheet - Page 21
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TS4990IST
Manufacturer Part Number
TS4990IST
Description
IC AMP AUDIO PWR 1.2W MONO 8MSOP
Manufacturer
STMicroelectronics
Type
Class ABr
Datasheet
1.TS4990IST.pdf
(32 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
TS4990IST
Manufacturer:
ST
Quantity:
56 000
Company:
Part Number:
TS4990IST
Manufacturer:
ST
Quantity:
3 190
Part Number:
TS4990IST
Manufacturer:
ST
Quantity:
20 000
TS4990
4.6
Note:
4.7
Wake-up time (t
When the standby is released to put the device ON, the bypass capacitor C
immediately. Because C
properly until the C
or t
If C
time.
Figure 61. Typical wake-up time vs. C
Due to process tolerances, the maximum value of wake-up time is shown in
Figure 62. Maximum wake-up time vs. C
The bypass capacitor C
time with this tolerance, refer to the graph above (considering for example for C
range of 0.8 µF
Standby time
When the standby command is set, the time required to put the two output stages in high
impedance and the internal circuitry in standby mode is a few microseconds. In standby
mode, the bypass pin and V
allows a quick discharge of C
WU
b
has a value other than 1 µF, refer to the graph in
and specified in the electrical characteristics tables with C
≤
C
b
b
≤
1.2 µF).
voltage is correct. The time to reach this voltage is called wake-up time
WU
b
b
also has a typical tolerance of +/-20%. To calculate the wake-up
600
500
400
300
200
100
is directly linked to the bias of the amplifier, the bias will not work
600
500
400
300
200
100
0
)
in
0
0.1
0.1
b
Tamb=25 ° C
pin are short-circuited to ground by internal switches. This
Tamb=25 ° C
and C
1
1
in
Vcc=2.6V
capacitors.
Bypass Capacitor Cb ( F)
Vcc=2.6V
Bypass Capacitor Cb ( F)
b
b
2
2
Vcc=3.3V
Vcc=3.3V
3
3
Figure 61
Vcc=5V
Vcc=5V
4
4
to establish the wake-up
b
4.7
Application information
= 1 µF.
4.7
b
Figure
is not charged
b
=1 µF in the
62.
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