The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 27, 2020
Filed:
Oct. 22, 2019
Hiroki Matsuda, Zama, JP;
Satoshi Arima, Isehara, JP;
Hiroki Matsuda, Zama, JP;
Satoshi Arima, Isehara, JP;
MITSUMI ELECTRIC CO., LTD., Tokyo, JP;
Abstract
Disclosed is a semiconductor device for switching power supply control including: a high voltage input starting terminal; a discharger; and an input state detection circuit that includes: a voltage divider; a peak hold circuit; a first comparator which detects generation of a plug removal state; a second comparator which detects generation of a brownout state; a timer circuit; and a control signal generation circuit which generates a signal to turn on the discharger or a signal to stop outputting of a switching control signal, Td, Tdand Tdare set to have a relationship of Td<Td<Td, Tdbeing a delay time until the capacitor is discharged, Tdbeing a delay time for determining the plug removal state, and Tdbeing a delay time for determining the brownout state, and at least the delay time Tdand the delay time Tdare measured by a common timer circuit.