Title:
Discharge circuit and power supply unit equipped with it
Document Type and Number:
Japanese Patent JP6348304
Kind Code:
B2
Abstract:
A discharge circuit has a voltage divider arranged to divide an alternating-current input voltage to produce a divided voltage, a high-pass filter arranged to pass a high-frequency component of the divided voltage to produce a monitoring voltage, a comparator arranged to compare the monitoring voltage with a threshold voltage to produce a comparison signal, a timer arranged to generate a timer signal indicating whether or not the comparison signal has been kept at the same logic level for a mask period, a controller arranged to generate a discharge control signal according to the timer signal, and a discharger arranged to discharge, according to the discharge control signal, an X capacitor connected to a node to which the alternating-current input voltage is applied.
More Like This:
| JPS62296407 | POWER SOURCE DEVICE |
| WO/2010/019865 | AC-TO-DC VOLTAGE CONVERSION AND CHARGING CIRCUITRY |
Inventors:
Yoshinori Sato
Manabu Oyama
Manabu Oyama
Application Number:
JP2014053687A
Publication Date:
June 27, 2018
Filing Date:
March 17, 2014
Export Citation:
Assignee:
ROHM Co., Ltd.
International Classes:
H02M3/28; H02M7/12
Domestic Patent References:
| JP11206003A | ||||
| JP2005045914A | ||||
| JP2011036124A | ||||
| JP2011067075A |
Foreign References:
| WO2012033120A1 |
Attorney, Agent or Firm:
Sano patent office
Shizuo Sano
Hideki Hayashida
Shizuo Sano
Hideki Hayashida
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