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AN4402 데이터시트(PDF) 35 Page - STMicroelectronics

부품명 AN4402
상세설명  Multichannel drivers driving inductive loads
PDF  39 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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AN4402 데이터시트(HTML) 35 Page - STMicroelectronics

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Appendix C
Summary of the demagnetization energy
Table 16. Demagnetization time and demagnetization energy for a low-side configured output
Load conditions
tDEMAG_LS
Demagnetization time
EDEMAG_LS
Demagnetization energy in the low-side configured output
With parallel resistor to the
inductor
RL > 0Ω
with
, valid if
Without parallel resistor to
the inductor
RL > 0Ω
with
Without parallel resistor to
the inductor
RL = 0Ω
with
L
R
L
-------
ln
V
CL_LS
V
CL_LS
V
BAT
–
---------------------------------------
R
L // Rp
R
L
--------------------



V
CL_LS
τ
R
L
------- VCL_LS
τ
R
L// Rp
-------------------- VCL_LS VBAT
–
()
–


1
R
p
R
L
R
p
+
--------------------
V
CL_LS
V
CL_LS
V
BAT
–
---------------------------------------
⋅



ln
+


τ
L
R
L
-------
=
R
p
V
CL_LS
V
BAT
–
V
BAT
--------------------------------------- RL
>
L
R
L
------- ln
V
CL_LS
V
CL_LS
V
BAT
–
---------------------------------------



L
R
L
------- V
CL_LS IL0
V
CL_LS
V
BAT
–
R
L
---------------------------------------
V
CL_LS
V
CL_LS
V
BAT
–
---------------------------------------



ln
–



I
L0
V
BAT
R
L
--------------
=
LI
L0
V
CL_LS
V
BAT
–
---------------------------------------
1
2
--- LIL0
2
V
CL_LS
V
CL_LS
V
BAT
–
---------------------------------------



I
L0
V
BAT
R
L
--------------
=



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