TS4962IQT STMicroelectronics, TS4962IQT Datasheet - Page 31

• Manufacturer Part Number: TS4962IQT
• Description: IC AMP AUDIO PWR 2.8W MONO 8DFN
• Manufacturer: STMicroelectronics
• Type: Class Dr

Specifications of TS4962IQT

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 2.8W x 1 @ 4 Ohm
• Voltage - Supply: 2.4 V ~ 5.5 V
• Features: Depop, Differential Inputs, Standby, Thermal Protection
• Mounting Type: Surface Mount
• Package / Case: 8-DFN
• Product: Class-D
• Output Power: 2 W
• Available Set Gain: 6 dB
• Common Mode Rejection Ratio (min): 57 dB
• Thd Plus Noise: 1 %
• Operating Supply Voltage: 3 V, 5 V
• Supply Current: 2.3 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Audio Load Resistance: 8 Ohms
• Input Signal Type: Differential
• Minimum Operating Temperature: - 40 C
• Output Signal Type: Differential
• Supply Type: Single
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.5 V
• For Use With: 497-6265 - BOARD EVAL FOR TS4962MEIJT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5993-2

TS4962
4.3
4.4
Common-mode feedback loop limitations
As explained previously, the common-mode feedback loop allows the output DC bias
voltage to be averaged at V
However, due to a V
page
range depends upon the values of V
V
with
And the result of the calculation must be in the range:
Due to the +/-9% tolerance on the 150 kΩ resistor, it is also important to check V
conditions.
If the result of the V
must be used. With V
For example:
With V
3 V-0.8 V = 2.2 V. With 136.5 kΩ we find 1.97 V and with 163.5 kΩ we have 2.02 V.
Therefore, no input coupling capacitors are required.
Low frequency response
If a low frequency bandwidth limitation is requested, it is possible to use input coupling
capacitors.
In the low frequency region, C
with R
So, for a desired cut-off frequency we can calculate C
with R
icm
value, we can apply this formula (no tolerance on R
4), the common-mode feedback loop can play its role only within a defined range. This
in
in
CC
, a first order high-pass filter with a -3 dB cut-off frequency.
in Ω and F
= 3 V, R
V
---------------------------------------------------------------------------------- - V
CC
×
in
2
CL
R
icm
= 150 k and V
×
icm
in
CC
in Hz.
(
R
+
calculation is not in the previous range, input coupling capacitors
limitation in the input stage (see
in
2
between 2.4 and 2.5 V, input coupling capacitors are mandatory.
V
×
+
icm
CC
136.5kΩ
V
IC
in
/2 for any DC common-mode bias input voltage.
=
Doc ID 10968 Rev 8
(input coupling capacitor) starts to have an effect. C
×
F
V
----------------------------------------------------------------------------- -
C
CL
IC
CC
136.5kΩ
in
0.5V V
)
V
= 2.5 V, we typically find V
CC
=
=
×
IC
2
------------------------------------- -
2π
--------------------------------------- -
2π
R
×
≤
and R
=
in
(
×
×
R
+
icm
≤
In
---------------------
R
R
in
2
+
1
in
1
in
icm
+
≤
×
2
in
+
×
×
V
150kΩ
V
In
(A
CC
≤
C
IC
F
-
Vdiff
V
---------------------------------------------------------------------------------- -
CL
in
×
–
CC
(V)
0.8V
150kΩ
)
). To have a good estimation of the
in
×
2
,
(Hz)
Table 3: Operating conditions on
R
in
(F)
×
):
in
(
R
+
in
2
icm
×
+
(V)
163.5kΩ
V
= 2 V, which is lower than
Application information
IC
×
163.5kΩ
)
icm
in
in these
forms,
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