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AN4402 Datasheet(PDF) 20 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) 20 Page - STMicroelectronics

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Demagnetization energy
AN4402
20/39
DocID025557 Rev 1
Figure 11. Equivalent circuit during the demagnetization of a high-side with parallel
resistor, VBAT > VCL_LS - VCL_HS
Therefore, the results for the low-side configured outputs are directly applicable to the high-
side configured outputs when VBAT < VCL_LS – VCL_HS.
Table 7. EDEMAG2_HS with VBAT > VCL_LS – VCL_HS
Conditions
EDEMAG2_HS: VBAT > VCL_LS – VCL_HS
RL > 0 Ω
with parallel resistor to the
inductor
Equation 25
with
, valid if
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
>



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