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CS4525 Folha de dados(PDF) 55 Page - Cirrus Logic

Nome de Peças CS4525
Descrição Electrónicos  30 W Digital TV Amplifier with Integrated ADC
PDF  91 Pages
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Fabricante Electrônico  CIRRUS [Cirrus Logic]
Página de início  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS4525 Folha de dados(HTML) 55 Page - Cirrus Logic

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DS726A1
55
CS4525
6.4.2
Full-Bridge Output Filter (Stereo or Parallel)
Figure 26 shows the output filter for a full-bridge configuration. The transient-voltage suppression circuit
(snubber circuit) is comprised of a resistor (20
Ω) and capacitor (330 pF) 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 impedance of the speaker, these
values set the cutoff frequency of the filter. Table 17 shows the component values based on nominal
speaker (load) impedance for a corner frequency (-3 dB point) of approximately 35 kHz.
Load
L1
C1
4
Ω
10 µH
1.0 µF
6
Ω
15 µH
0.47 µF
8
Ω
22 µH
0.47 µF
Table 17. Low-Pass Filter Components - Full-Bridge
OUT1
330 pF
20
Ω
OUT2
C1
L1
L1
Figure 26. Output Filter - Full-Bridge



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