STEVAL-CCA012V1 STMicroelectronics, STEVAL-CCA012V1 Datasheet - Page 25

• Manufacturer Part Number: STEVAL-CCA012V1
• Description: BOARD EVAL BASED ON TS2007
• Manufacturer: STMicroelectronics

Specifications of STEVAL-CCA012V1

• Amplifier Type: Class D
• 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
• Operating Temperature: -40°C ~ 85°C
• Board Type: Fully Populated
• Utilized Ic / Part: TS2007
• Description/function: Audio Amplifiers
• Operating Supply Voltage: 2.4 V to 5.5 V
• Output Power: 3 W
• Product: Audio Modules
• Silicon Manufacturer: ST Micro
• Silicon Core Number: TS2007
• Kit Application Type: Amplifier
• Application Sub Type: Audio Power Amplifier
• Kit Contents: Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: TS2007
• Other names: 497-9004

TS2007
4.10
Output filter considerations
The TS2007 is designed to operate without an output filter. However, due to very sharp
transients on the TS2007 output, EMI radiated emissions may cause some standard
compliance issues.
These EMI standard compliance issues can appear if the distance between the TS2007
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:
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Figure 51. Ferrite chip bead placement
In the case where the distance between the TS2007 output and the speaker terminals is too
long, it is possible to have low frequency EMI issues due to the fact that the typical operating
frequency is 280kHz. In this configuration, it is necessary to use the output filter represented
in
Figure 1 on page 4
Reduce, as much as possible, the distance between the TS2007 output pins and the
speaker terminals.
Use a ground plane for “shielding” sensitive wires.
Place, as close as possible to the TS2007 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
From TS2007 output
51).
as close as possible to the TS2007.
Ferrite chip bead
about 100pF
gnd
Application information
to speaker
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