公开(公告)号：US10014850B2

公开(公告)日：2018-07-03

申请号：US15287719

申请日：2016-10-06

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Hsinlun Li

IPC: H03K3/00 ,  H03K17/0812 ,  H03K5/08 ,  H03K17/082 ,  H03K17/10 ,  H03K17/12

CPC classification number: H03K17/08122 ,  H03K5/08 ,  H03K17/0822 ,  H03K17/102 ,  H03K17/122

Abstract: The present invention provides a driving stage circuit, including a driving switch circuit and a conduction resistance adjusting circuit. The driving switch circuit generates an output signal according to a switch control signal. The conduction resistance adjusting circuit clamps the switch control signal to a first clamping level according to a current flowing through the driving switch circuit when the current is higher than a first current threshold, such that the conduction resistance of the driving switch circuit is not smaller than a first resistance so that a short circuit current of the driving switch circuit is not larger than a short circuit current limit, wherein a lowest level of the conduction resistance of the driving switch circuit is smaller than a second resistance and the output voltage level does not exceeds a output voltage limit when the current is lower than the first current threshold.

公开(公告)号：US20170359055A1

公开(公告)日：2017-12-14

申请号：US15287719

申请日：2016-10-06

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Hsinlun Li

IPC: H03K17/0812 ,  H03K5/08

CPC classification number: H03K17/08122 ,  H03K5/08 ,  H03K17/0822 ,  H03K17/102 ,  H03K17/122

Abstract: The present invention provides a driving stage circuit, including a driving switch circuit and a conduction resistance adjusting circuit. The driving switch circuit generates an output signal according to a switch control signal. The conduction resistance adjusting circuit clamps the switch control signal to a first clamping level according to a current flowing through the driving switch circuit when the current is higher than a first current threshold, such that the conduction resistance of the driving switch circuit is not smaller than a first resistance so that a short circuit current of the driving switch circuit is not larger than a short circuit current limit, wherein a lowest level of the conduction resistance of the driving switch circuit is smaller than a second resistance and the output voltage level does not exceeds a output voltage limit when the current is lower than the first current threshold.