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:
Apr. 14, 2020
Filed:
Jan. 17, 2019
Renesas Electronics Corporation, Tokyo, JP;
Hideyuki Tajima, Tokyo, JP;
RENESAS ELECTRONICS CORPORATION, Tokyo, JP;
Abstract
A semiconductor device includes: a drive transistor controlling current supply to a load; a current detector unit detecting a current of a sense transistor through which a current proportional to the current flowing through the drive transistor flows; a controller unit generating a pulse signal with a duty ratio corresponding to the detection result of the current detector unit; a voltage monitor monitoring whether a voltage of an external output terminal reaches a battery voltage; and a pre-driver performing charge and discharge to a control terminal of the drive transistor based on the pulse signal. The pre-driver performs the charge and discharge to the control terminal of the drive transistor at a first speed, when the voltage of the external output terminal reaches the battery voltage, and at a speed faster than the first speed, when the voltage of the external output terminal reaches the battery voltage.