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AN4250 Datasheet(PDF) 7 Page - STMicroelectronics

Part # AN4250
Description  Fishbone diagram for power factor correction
PDF  15 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4250 Datasheet(HTML) 7 Page - STMicroelectronics

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DocID024230 Rev 1
7/15
AN4250
Boost converter
15
Figure 5. CCM Boost converter waveforms
DCM
In the discontinuous transition mode the current, through the inductor during an entire
period, reaches the zero value, so the diode and the switch start their conduction phase
from zero.
Figure 6. DCM Boost converter waveforms
As it is possible to notice, during the discharge phase of the inductor, the current reaches
zero.
OFF
ON
ON
S
vD
iL
vS
Io
iD
Ton
Toff
Vin / L
F
slopes
- (V -V )
o
/ L
F
Iin
Vo
OFF
in
Vo
AM17353v1
iL
vS
Iin
Ton
T'off
Vo
OFF
OFF
ON
ON
S
v
D
- Vin
Vo
Vin
Tdcm
DCM
Vo
AM17354v1



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