Title:
LOAD DRIVER
Document Type and Number:
Japanese Patent JPH0833314
Kind Code:
A
Abstract:
PURPOSE: To obtain a load driver in which an N-type semiconductor element can be used as a high side switching means by obtaining a control voltage higher than the power supply voltage through simple and highly reliable circuitry.
CONSTITUTION: In a circuit for controlling the average current by turning a power supply voltage VB being applied to a load 40 ON/OFF at a predetermined ratio through a switch means Sw1, a capacitor is charged with the potential different generated between the load and the power supply when the switch means Sw 1 is turned ON and OFF. A control voltage higher than the power supply voltage VB is fed to a drive circuit 20 using the charges stored in the capacitor.
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Inventors:
MAEDA KENICHIRO
YOSHIDA DAISUKE
KATO KOICHI
KAWAMICHI YASUSHI
YOSHIDA DAISUKE
KATO KOICHI
KAWAMICHI YASUSHI
Application Number:
JP11331095A
Publication Date:
February 02, 1996
Filing Date:
May 11, 1995
Export Citation:
Assignee:
KOMATSU MFG CO LTD
International Classes:
H02P25/06; H02M1/08; H02P7/00; H02P8/12; H03K17/567; H03K17/695; (IPC1-7): H02M1/08; H02P7/00; H02P8/12; H03K17/567; H03K17/695
Attorney, Agent or Firm:
Kimura Takahisa
Next Patent: LOAD DRIVER