TS4962IQT STMicroelectronics, TS4962IQT Datasheet - Page 30

• 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

Application information
4
4.1
4.2
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Application information
Differential configuration principle
The TS4962 is a monolithic, fully differential input/output class D power amplifier. The
TS4962 also includes a common-mode feedback loop that controls the output bias value to
average it at V
always have a maximum output voltage swing, and by consequence, maximize the output
power. Moreover, as the load is connected differentially compared to a single-ended
topology, the output is four times higher for the same power supply voltage.
The advantages of a fully differential amplifier are:
●
●
●
●
●
The main disadvantage is that, since the differential function is directly linked to the external
resistor mismatching, particular attention should be paid to this mismatching in order to
obtain the best performance from the amplifier.
Gain in typical application schematic
Typical differential applications are shown in
In the flat region of the frequency-response curve (no input coupling capacitor effect), the
differential gain is expressed by the relation:
with R
Due to the tolerance of the internal 150 kΩ feedback resistor, the differential gain is in the
range (no tolerance on R
high PSRR (power supply rejection ratio).
high common mode noise rejection.
virtually zero pop without additional circuitry, giving a faster start-up time compared to
conventional single-ended input amplifiers.
easier interfacing with differential output audio DAC.
no input coupling capacitors required because of common-mode feedback loop.
in
expressed in kΩ.
CC
/2 for any DC common-mode input voltage. This allows the device to
in
):
Doc ID 10968 Rev 8
A
V
diff
273
--------- - A
R
=
in
Out
------------------------------ -
≤
In
+
+
Figure 1 on page
V
–
–
diff
Out
In
≤
-
327
--------- -
R
-
in
=
300
--------- -
R
in
6.
TS4962