TS489IQT STMicroelectronics, TS489IQT Datasheet - Page 26

• Manufacturer Part Number: TS489IQT
• Description: IC AMP AUDIO PWR .13W STER 8DFN
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TS489IQT

• Output Type: Headphones, 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 130mW x 2 @ 16 Ohm
• Voltage - Supply: 2.2 V ~ 5.5 V
• Features: Depop, Short-Circuit Protection, Standby
• Mounting Type: Surface Mount
• Package / Case: 8-DFN
• For Use With: 497-6363 - BOARD DEMO FOR TS489
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5991-2

Application information
4.8
Note:
4.9
26/32
Wake-up time
When the standby is released to put the device ON, the bypass capacitor C
immediately. As C
properly until the C
20ms (pop precaution) is called the wake-up time or t
characteristics table with C
If C
can be read directly from
Figure 83. Typical wake-up time vs. bypass capacitance
It is assumed that the C
wake-up time is shorter.
POP performance
Pop performance is closely related to the size of the input capacitor C
dependent on the lower cut-off frequency and PSRR values requested.
In order to reach low pop, C
rule, the equivalent input constant time (R
τ
Example calculation:
In the typical application schematic R
(-3db attenuation) is given by the following formula:
in
= R
b
has a value other than 1µF, t
in
x C
in
< 0.0067 (s)
b
b
is directly linked to the bias of the amplifier, the bias will not work
voltage is correct. The time to reach this voltage plus a time delay of
400
350
300
250
200
150
100
50
b
0
voltage is equal to 0V. If the C
Figure
0
b
in
T
= 1µF.
AMB
must be charged to
t
WU
=25°C
83.
WU
1
=
F
can be calculated by applying the following formulas or
in
CL
C
--------------------- -
0.03125
is 20kΩ and C
b
⋅
=
in
2.5
------------------------------------- -
2π
C
2
in
⋅
+
) should be less then 6.7ms:
Cb (
20
R
1
in
V
μ
⋅
F)
CC
[ms;μF ]
in
C
WU
3
/2 in less than 20ms. To follow this
in
is 330nF. The lower cut-off frequency
b
; it is specified in the electrical
voltage is not equal to 0V, the
4
in
. The size of C
5
b
is charged
TS488-TS489
in
is