Title:
A light implement for vehicles, its drive, its control method
Document Type and Number:
Japanese Patent JP6262557
Kind Code:
B2
Abstract:
A current controller 42 compares a first coil current IL1 flowing in an output inductor L1 with a first upper threshold value and a first lower threshold value. A current limiter 44 compares a second coil current IL2 flowing in an input inductor L2 with a second upper threshold value and a second lower threshold value. A duty controller 46 (i) switches a switching transistor M1 based on the first coil current in a cycle where the first coil current IL1 exceeds the first upper threshold value before the second coil current IL2, exceeds the second upper threshold value. According to the current controller 42, it is possible to stabilize an output current and to limit a current.
Inventors:
Masayasu Ito
Muramatsu Takao
Shohei Yanaizu
Muramatsu Takao
Shohei Yanaizu
Application Number:
JP2014024759A
Publication Date:
January 17, 2018
Filing Date:
February 12, 2014
Export Citation:
Assignee:
Koito Manufacturing Co., Ltd.
International Classes:
H05B44/00; H05B37/02
Domestic Patent References:
| JP2005224094A | ||||
| JP2013222516A | ||||
| JP2013099072A | ||||
| JP2007126041A |
Foreign References:
| WO2011043010A1 | ||||
| WO2013172006A1 |
Attorney, Agent or Firm:
Sakaki Morishita
Yusuke Murata
Tomoyuki Miki
Yusuke Murata
Tomoyuki Miki