TS2007FC_V01 datasheet(27/33 Pages) STMICROELECTRONICS

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TS2007FC

Application information

Figure 45. Typical application for single-ended input configuration

4.10

Output filter considerations

The TS2007FC is designed to operate without an output filter. However, due to very sharp

transients on the TS2007FC output, EMI radiated emissions may cause some standard

compliance issues.

These EMI standard compliance issues can appear if the distance between the TS2007FC

outputs and loudspeaker terminal are long (typically more than 50 mm, or 100 mm in both

directions). 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 TS2007FC output pins and the

speaker terminals

•

Use a ground plane for shielding sensitive wires

•

Place, as close as possible to the TS2007FC and in series with each output, a ferrite

bead with a rated current of minimum 2.5 A and impedance greater than 50

Ω at

frequencies above 30 MHz

•

Allow an extra footprint to place, if necessary, a capacitor to short perturbations to

ground (Figure 46)

VCC

Cin

Input

Speaker

1uF

TS2007FC

Gain

Select

Standby

Control

PWM

Bridge

Oscillator

IN-

IN+

Vcc

OUT+

OUT-

Standby

Gnd

Protection

Circuit

Gain select control

Standby control

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