公开(公告)号：US20170317488A1

公开(公告)日：2017-11-02

申请号：US15141365

申请日：2016-04-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Pradeep V S R PYDAH ,  Biranchinath SAHU ,  Tetsuo TATEISHI ,  Kuang-Yao CHENG ,  Nandakishore RAIMAR

IPC: H02H7/12 ,  H02H3/087 ,  G06F1/26

CPC classification number: H02H7/1213 ,  G06F1/26 ,  H02H3/087

Abstract: The disclosure provides an over-current protection circuit. A signal generating block in the over-current protection circuit generates one or more input voltages, a summed voltage and an average voltage in response to one or more differential voltages. A control block generates one or more control signals in response to the one or more input voltages and the average voltage. An analog control loop block generates an initiation signal in response to the summed voltage and an output voltage. A phase control logic block generates one or more PWM (pulse width modulated) signals in response to the initiation signal and the one or more control signals.

公开(公告)号：US20200059212A1

公开(公告)日：2020-02-20

申请号：US16105604

申请日：2018-08-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Nandakishore RAIMAR

IPC: H03F3/45 ,  H03G3/30 ,  G01R19/00 ,  G01R15/00

Abstract: In examples, an apparatus for sensing current comprises a power transistor; a sense transistor coupled to the power transistor; and an offset addition circuit coupled to the power transistor and the sense transistor, the offset addition circuit comprising a first pair of transistors and a differential amplifier. The apparatus also comprises a cascode amplifier circuit coupled to the offset addition circuit, the cascode amplifier circuit comprising a second pair of transistors, and a gain trim circuit coupled to the cascode amplifier circuit, the gain trim circuit including another differential amplifier and a third transistor. The apparatus further includes an analog-to-digital converter (ADC) coupled to the gain trim circuit and storage coupled to the ADC.