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AN3400 Folha de dados(PDF) 39 Page - STMicroelectronics

Nome de Peças AN3400
Descrição Electrónicos  Analysis and simulation of a BJT complementary pair in a self-oscillating CFL solution
PDF  78 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3400 Folha de dados(HTML) 39 Page - STMicroelectronics

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AN3400
Modeling of re-circulating phase preliminary to the NPN conduction time phase
Doc ID 018840 Rev 1
39/78
signal opportunely modeled in order to take into consideration the effect of demagnetization
current for the inductor Lp.
Also in this case, for the NPN bipolar base current IBnpn, the formula below is valid during
the whole re-circulating phase preliminary to the NPN conduction time phase:
Equation 9
in which
is a discharging voltage on the Cp capacitor (that is
).
 
()
()
( )
()
()
()
()t
V
dt
d
C
t
V
dt
d
C
t
I
t
I
t
I
npnric
Cp
npnric
Cn
npnric
Cp
npnric
Cn
Bnpn
−
−
−
−
⋅
−
⋅
=
+
=
 
()t
V
npnric
Cp
−
 
()
() 0
t
V
dt
d
npnric
Cp
<
−



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