Title:
LOAD DRIVING DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/091038
Kind Code:
A1
Abstract:
This load driving device comprises a flyback converter which includes: a transformer which has a primary winding connected to a power supply and a secondary winding connected to a load; and a switch element which is disposed in a ground side of the primary winding and controls an application voltage to the primary winding. In addition, the present invention generates a voltage (Vc) to be compared that is smaller than a voltage Vds between the primary winding and the switch element, and changes a driving signal Vgs for the switch element to put the switch element in an On state from an Off state, when the voltage Vc to be compared is dropped to a prescribed voltage (ground potential) (at time tc).
Inventors:
KUROIWA NOBUYUKI (JP)
Application Number:
PCT/JP2019/043020
Publication Date:
May 07, 2020
Filing Date:
November 01, 2019
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
H02M3/28
Foreign References:
| JP2014217082A | 2014-11-17 | |||
| JP2013123322A | 2013-06-20 | |||
| US7471522B2 | 2008-12-30 |
Attorney, Agent or Firm:
OGAWA, Moriaki et al. (JP)
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