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公开(公告)号：US11539315B1
公开(公告)日：2022-12-27
申请号：US17357812
申请日：2021-06-24
Applicant: Texas Instruments Incorporated
Inventor： Venkatesh Guduri , Venkata Naresh Kotikelapudi , Ganapathi Shankar Krishnamurthy , Ashish Ojha
Abstract: A driver circuit includes a first switch which has a first terminal coupled to a voltage supply terminal, a second terminal coupled to a high-side gate, and a third terminal coupled to receive a voltage supply enable signal. The first switch is operable to connect the voltage supply terminal to the high-side gate responsive to the voltage supply enable signal. The driver circuit includes a second switch which has a first terminal coupled to a charge pump terminal, a second terminal coupled to the high side gate, and a third terminal coupled to receive a charge pump enable signal. The second switch is operable to connect the charge pump terminal to the high-side gate responsive to the charge pump enable signal.
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公开(公告)号：US11171587B2
公开(公告)日：2021-11-09
申请号：US16703403
申请日：2019-12-04
Applicant: Texas Instruments Incorporated
IPC: H02P8/12 , G01R19/165 , H03K5/24 , H03M1/00 , H02P7/03 , H02P8/22 , H03K17/687 , H03K3/3565
Abstract: An integrated circuit includes an H-bridge circuit having a first output node for coupling to a high-side terminal of an inductor and a second output node for coupling to a low-side terminal of the inductor. A current sense FET is coupled between a current source and the lower supply voltage to provide a reference current that includes a peak current limit at a sensing node. A current-sense comparator has a first input coupled to the sensing node, a second input coupled to the second output node and an output coupled to send an output signal towards a driver control circuit. A FET linear detection circuit is coupled to receive a gate voltage of an active low-side power FET and has an output coupled to enable the current-sense comparator when the active low-side power FET is operating in a linear region.
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