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AS3418 Folha de dados(PDF) 39 Page - ams-OSRAM AG

Nome de Peças AS3418
Descrição Electrónicos  Low Noise ANC Solution
PDF  78 Pages
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Fabricante Electrônico  AMSOSRAM [ams-OSRAM AG]
Página de início  https://ams-osram.com/
Logo AMSOSRAM - ams-OSRAM AG

AS3418 Folha de dados(HTML) 39 Page - ams-OSRAM AG

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AS3418
Functional Description
Datasheet
• PUBLIC
DS000507
• v4-00 • 2020-Jan-23
77
│ 38
Figure 49:
Playback Only Mode Timing Diagram
6.9
VNEG Charge Pump
The VNEG charge pump uses one external 2.2µF ceramic capacitor (CFLY) to generate a negative
supply voltage out of the input voltage to supply all audio related blocks. This allows a true-ground
headphone output with no need of external DC-decoupling capacitors.
Figure 50:
VNEG Charge Pump
The charge pump typically requires an input capacitor CVBAT with 4.7µF, an output capacitor CVNEG with
a capacity of typ. 10µF and a flying capacitor CFLY with 2.2µF.
ANC/CSDA Pin
ANC ON
Playback Only Mode
ANC ON
200-400ms
200-400ms
>65% VBAT
<35% VBAT
Operation Mode
Charge Pump
Connection to audio blocks
VBAT
VBAT
VNEG
VNEG
CVNEG
CVBAT
CFLY



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