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AN3400 Scheda tecnica(PDF) 39 Page - STMicroelectronics

Il numero della parte AN3400
Spiegazioni elettronici  Analysis and simulation of a BJT complementary pair in a self-oscillating CFL solution
PDF  78 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3400 Scheda tecnica(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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