CS4525 datasheet(60/98 Pages) CIRRUS

No. de pieza	CS4525

Descripción Electrónicos	30 W Digital Audio Amplifier with Integrated ADC

PDF	98 Pages

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Fabricante Electrónico	CIRRUS [Cirrus Logic]

Página de inicio	http://www.cirrus.com

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60 / 98 page

DS726PP1

CS4525

6.4.2

Full-Bridge Output Filter (Stereo or Parallel)

Figure 27 shows the output filter for a full-bridge configuration. The transient-voltage suppression circuit

(snubber circuit) is comprised of a capacitor (680 pF) and a resistor (5.6

Ω, 1/8 W) on each output pin and

should be placed as close as possible to the corresponding PWM output pins to greatly reduce radiated

EMI. The inductors, L1, and capacitor, C1, comprise the low-pass filter. Along with the nominal load im-

pedance of the speaker, these values set the cutoff frequency of the filter. Table 20 shows the component

values based on nominal speaker (load) impedance for a corner frequency (-3 dB point) of approximately

35 kHz.

Load

L1, L2

10 µH

1.0 µF

15 µH

0.47 µF

22 µH

0.47 µF

Table 20. Low-Pass Filter Components - Full-Bridge

OUTX+

OUTX-

*Diode is Rohm

RB160M-30 or

equivalent

680 pF

5.6

680 pF

5.6

Figure 27. Output Filter - Full-Bridge

CS4525 Datasheet(PDF) 60 Page - Cirrus Logic