Title:
A switching power supply unit and its control device
Document Type and Number:
Japanese Patent JP5942350
Kind Code:
B2
Abstract:
A switching regulator related to aspects of the invention can include an auxiliary winding for monitoring the voltage across the primary winding of a transformer, a differentiation detecting circuit that detects the timing of reversal start or reversal end of the signal detected by the auxiliary winding and a dead time adjusting circuit that receives a signal to trigger turn OFF of a first switch or a second switch and, after passing a predetermined delay time from the detection of the signal, generates a signal to trigger turn ON of the first switch or the second switch. The differentiation detecting circuit can confirm current transfer between body diodes. The dead time adjusting circuit can adjust a dead time to deliver the signal after a predetermined time from the confirmation of the current transfer. In some aspects of the invention, occurrence of hard switching and short-circuit current can be suppressed.
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Inventors:
Chen Kenichi
Application Number:
JP2011150974A
Publication Date:
June 29, 2016
Filing Date:
July 07, 2011
Export Citation:
Assignee:
Fuji Electric Co., Ltd.
International Classes:
H02M3/28
Domestic Patent References:
| JP2002325451A | ||||
| JP2008283834A | ||||
| JP2005051918A | ||||
| JP2007527190A | ||||
| JP2007006614A | ||||
| JP2001258269A |
Attorney, Agent or Firm:
Takeshi Hattori