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A6986F 데이터시트(PDF) 17 Page - STMicroelectronics

부품명 A6986F
상세설명  38 V 1.5 A synchronous step-down switching regulator
PDF  72 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

A6986F 데이터시트(HTML) 17 Page - STMicroelectronics

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A6986F
Functional description
72
Figure 5. Soft-start phase
The CSS is dimensioned accordingly with Equation 1:
Equation 1
where TSS is the soft-start time, ISS CH the charging current and VFB the reference of the
error amplifier.
The soft-start block supports the precharged output capacitor.
t
VCC
VCCH
VSS INH
VSS END
tSS
VREF
EA reference
SS/INH pin
Internal soft start signal
VCC pin
VSS START
CSS
SSGAIN
ISSCH TSS
VFB
--------------------------------
3
4
AT
SS
0.85V
---------------------------
==



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