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STTH3BCF060 Datenblatt(PDF) 5 Page - STMicroelectronics

Teilenummer STTH3BCF060
Bauteilbeschribung  suitable for PFC up to 400 W
PDF  8 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STTH3BCF060 Datenblatt(HTML) 5 Page - STMicroelectronics

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STTH3BCF060
Application information
Doc ID 17524 Rev 2
5/8
2
Application information
Figure 13.
Application schematic
2.1
BC2 topology description (ST patent)
No hard switching occurs at turn-on with BC2 topology. Inductor L in series with the power
MOS Q configuration suppresses the switch-on losses. Added winding, coupled with the
main boost inductor Lmain, in series with the STTH3BCF060 freewheel diode brings back
both recovery current from the STTH8BC065 and damping current towards the power
circuit. Another added winding in series with STTH8BC065 boost diode discharges the
nominal current stored in inductor L flowing through STTH8BC060 diode towards output
bulk capacitor.
These two added phases compared with conventional continuous mode PFC, bring back
the current corresponding to the usual switching losses in the circuit, hence BC2 (back
current circuit).
V MAINS
STTH8BC065
LMAIN
L
Q
STTH8BC060
STTH3BCF060



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