Title:
LOAD DRIVE DEVICE
Document Type and Number:
Japanese Patent JP3842061
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a load drive device that suppresses rush current at start of driving a load.
SOLUTION: The load drive device uses a power supply whose output voltage is higher than a usual drive voltage of a load to drive the load. A FET 4 is connected to the load 2 and a rectangular wave pulse signal S1 is supplied from a rectangular wave pulse output means 5a to the gate of the FET 4. Then the FET 4 is turned on/off by this signal S1 to supply a current to the load 2. Furthermore, when a rush current flows to the load 2 at start of driving and a time constant circuit provided to the gate of the FET 4 is activated to provide a time constant at the rise of the rectangular wave pulse signal S1. Thus, the current flowing through the load 2 is gradually increased to suppress the rush current.
Inventors:
Yasuhiro Tamai
Tetsuya Hasegawa
Tetsuya Hasegawa
Application Number:
JP2001087611A
Publication Date:
November 08, 2006
Filing Date:
March 26, 2001
Export Citation:
Assignee:
Yazaki Corporation
International Classes:
B60Q1/00; H03K17/08; G05F1/10; H02J1/00; H02M3/155; H02M3/156; H03K17/082; H03K17/687; H05B39/02; H05B39/04; (IPC1-7): H03K17/08; B60Q1/00; H02J1/00; H03K17/687; //G05F1/10; H02M3/155
Domestic Patent References:
| JP11068532A | ||||
| JP10055729A | ||||
| JP2000134075A | ||||
| JP5168164A | ||||
| JP10023743A |
Attorney, Agent or Firm:
Hidekazu Miyoshi
Iwa Saki Kokuni
Kawamata Sumio
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu
Iwa Saki Kokuni
Kawamata Sumio
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu