Title:
SEMICONDUCTOR DEVICE FOR POWER SUPPLY CONTROL
Document Type and Number:
Japanese Patent JP2016158310
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To speedily discharge residual electric charges in an X capacitor in unplugging without increasing external elements nor components.SOLUTION: A power supply control circuit (13) which generates and outputs a drive pulse for ON/OFF control over a switching element (SW) is provided with: an ON/OFF control signal generating circuit which generates a control signal for ON/OFF control over the switching element (SW) for supplying a current intermittently to a primary-side winding of a transformer for voltage conversion; a high-voltage input start terminal (HV) to which an AC voltage to be rectified is input; a high-voltage input monitor circuit (40) monitoring a voltage at the high-voltage input start terminal; and discharging means (45) connected between the high-voltage input start terminal and a ground point. In the power supply control circuit, the discharging means is turned ON once the high-voltage input monitor circuit detects the voltage at the high-voltage input start terminal staying at a predetermined voltage value or higher continuously for a predetermined time.SELECTED DRAWING: Figure 5
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Inventors:
MATSUDA HIROKI
MURATA YUKIO
MURATA YUKIO
Application Number:
JP2015032442A
Publication Date:
September 01, 2016
Filing Date:
February 23, 2015
Export Citation:
Assignee:
MITSUMI ELECTRIC CO LTD
International Classes:
H02M3/28
Domestic Patent References:
| JP2014204573A | 2014-10-27 |
Foreign References:
| WO2012140840A1 | 2012-10-18 |
Attorney, Agent or Firm:
Hiroshi Arafune
Yoshio Arafune
Yoshio Arafune