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AN4402 Datasheet(PDF) 18 Page - STMicroelectronics

Part # AN4402
Description  Multichannel drivers driving inductive loads
PDF  39 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4402 Datasheet(HTML) 18 Page - STMicroelectronics

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Demagnetization energy
AN4402
18/39
DocID025557 Rev 1
Table 6. EDEMAG1_HS with VBAT < VCL_LS – VCL_HS
Conditions
EDEMAG1_HS: VBAT < VCL_LS – VCL_HS
RL > 0 Ω
with parallel resistor to the
inductor
Equation 22
with
, valid if
RL > 0 Ω
No parallel resistor to the
inductor: RP = +∞
Equation 23
with
RL = 0 Ω
RP = +∞
Equation 24
with
V
CL_HS
V
BA T
+
() τ
R
L
------- V
CL_HS
V
BAT
+
()
τ
R
L// Rp
-------------------- V
CL_HS
()
–
1
R
p
R
L
R
p
+
--------------------
V
CL_HS
V
BAT
+
V
CL_HS
----------------------------------------
⋅



ln
+



τ
L
R
L
-------
=
R
p
V
CL_HS
V
BAT
-------------------
R
L
>
L
R
L
------- VCL_HS VBAT
+
() I
L0
V
CL_HS
R
L
-------------------
V
CL_HS
V
BAT
+
V
CL_HS
----------------------------------------



ln
–



I
L0
V
BAT
R
L
--------------
=
1
2
--- LIL0
2
V
CL_HS
V
BAT
+
V
CL_HS
----------------------------------------



I
L0
V
BAT
R
L
--------------
=



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