Title:
CIRCUIT DEVICE AND ELECTRONIC EQUIPMENT
Document Type and Number:
Japanese Patent JP2015154658
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a circuit device, electronic equipment, and the like, capable of achieving lower power consumption and reduction in the number of components by eliminating the need for a sense resistor.SOLUTION: A circuit device includes: a bridge circuit 10 including high-side transistors Q1 and Q3 and low-side transistors Q2 and Q4; a detection circuit 30 which compares a detection voltage V2 (V1) set by on-state current and on-resistance of at least one of the low-side transistor Q4 and the high-side transistor Q1 with a reference voltage VR, and outputs the detection results; and a control circuit 20 which controls on/off of the high-side transistors Q1 and Q3 and the low-side transistors Q2 and Q4 and switches a charge period to a decay period on the basis of the detection results in the detection circuit 30.
Inventors:
INOUE KATSUMI
YAMADA ATSUSHI
YAMADA ATSUSHI
Application Number:
JP2014028249A
Publication Date:
August 24, 2015
Filing Date:
February 18, 2014
Export Citation:
Assignee:
SEIKO EPSON CORP
International Classes:
H02P7/29
Domestic Patent References:
| JP2013198361A | 2013-09-30 | |||
| JP2008042975A | 2008-02-21 | |||
| JP2003061392A | 2003-02-28 | |||
| JPH07297357A | 1995-11-10 | |||
| JP2012098259A | 2012-05-24 | |||
| JPH10173135A | 1998-06-26 | |||
| JP2013236199A | 2013-11-21 |
Attorney, Agent or Firm:
Masahiko Ueyanagi
Kazuaki Watanabe
Kazuaki Watanabe