TS2012IQT View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
TS2012IQT Datasheet PDF : 30 Pages
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TS2012
Application information
Figure 45. Typical application for single-ended input configuration
Left Input
Cin
Cin
Right Input
Cin
Cin
Cs
100nF
VCC
CsL VCC VCC
1μF
CsR
1μF
Gain Select
Control
TS2012
LIN +
LIN -
G0
G1
RIN +
RIN -
Gain
Select
Gain
Select
STBY L Standby
STBY R Control
PWM
H
Bridge
LOUT+
LOUT-
Oscillator
PWM
H
Bridge
ROUT+
ROUT-
Left speaker
Right speaker
Standby Control
4.10
Output filter considerations
The TS2012 is designed to operate without an output filter. However, due to very sharp
transients on the TS2012 output, EMI radiated emissions may cause some standard
compliance issues.
These EMI standard compliance issues can appear if the distance between the TS2012
outputs and loudspeaker terminal are long (typically more than 50mm, or 100mm in both
directions, to the speaker terminals). As the PCB layout and internal equipment device are
different for each configuration, it is difficult to provide a one-size-fits-all solution.
However, to decrease the probability of EMI issues, there are several simple rules to follow:
● Reduce, as much as possible, the distance between the TS2012 output pins and the
speaker terminals.
● Use a ground plane for “shielding” sensitive wires.
● Place, as close as possible to the TS2012 and in series with each output, a ferrite bead
with a rated current of minimum 2.5A and impedance greater than 50Ω at frequencies
above 30MHz. If, after testing, these ferrite beads are not necessary, replace them by a
short-circuit.
● Allow extra footprint to place, if necessary, a capacitor to short perturbations to ground
(see Figure 46).
25/30
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