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AN2738 датащи(PDF) 31 Page - STMicroelectronics

номер детали AN2738
подробное описание детали  L6390 half-bridge gate driver
PDF  54 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2738 датащи(HTML) 31 Page - STMicroelectronics

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AN2738
Application example
Doc ID 14589 Rev 2
31/54
Figure 28.
Turn-off hard switching details with induction load: gate charge and
plateau phase
The rising dVOUT/dt and Trise can be calculated as follows:
Equation 9
Equation 10
Toff
Trise
T4
T1
T2
T3
Vth
Vgs_p
Vge_max
plateau
t
t, Q
HVbus
Iload
Vge
Vce, Ic
Ic
Vce
T3
T2
T1
GATE CHARGE CURVES
Ic vs Vce CHARACTERISTICS
Qge
Qgc
Qg
plateau
Vge
Vge = Vge_p
Iload
Vce_sat
HVbus
Final tail
only for
IGBTs
Trise
Toff
Ic = 0
OFF
Vge
Cge
Ic
Cge
Vce
=
HVbus
Vge = Vge_p
Cge
Ic
=
Iload
Vce
Cgc
dVce
dt
Cgc = Isink
Cge
Vce = Vce_sat
Vge
Vge
Vce
=
HVbus
Ic
=
Iload
T1
T2
T3
T4
PLATEAU
PHASE
OFF
OFF
OFF
diode OFF
diode ON
diode ON
diode OFF
Isink
Isink
Isink
Isink
Vge = Vge_max
WORKING
CURVE
APPROX.
REAL
dV
OUT
dt
------------------
⎝⎠
⎛⎞
RISE
I
SINK
C
GC
-------------
=
T
RISE
Q
GC
I
SINK
-------------
=



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