公开(公告)号：US20180219547A1

公开(公告)日：2018-08-02

申请号：US15636365

申请日：2017-06-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Rajdeep BONDADE ,  Nathan SCHEMM ,  Rajarshi MUKHOPADHYAY

IPC: H03K17/687 ,  H03K5/1532 ,  H03K5/08 ,  H03K3/0233 ,  H03K5/24 ,  H02M1/08

CPC classification number: H03K17/687 ,  H02M1/08 ,  H03K3/02337 ,  H03K5/08 ,  H03K5/1532 ,  H03K5/2472 ,  H03K5/2481 ,  H03K17/0822 ,  H03K17/165

Abstract: An apparatus includes a voltage divider circuit including a plurality of series- connected capacitors and including an input terminal of one of the capacitors configured to receive a first voltage from a switch, and a ring node comprising the connection between at least two of the series-connected capacitors. The apparatus further includes a negative clamp circuit coupled to the ring node of the voltage divider circuit and a bias voltage node. The bias voltage node is configured to receive a bias voltage and responsive to a ring voltage on the ring node being less than the bias voltage, the negative clamp circuit is configured to clamp the ring voltage at a first threshold voltage. The apparatus also includes a peak detector circuit coupled to the ring node of the voltage divider circuit and configured to detect a peak amplitude of the ring voltage. The apparatus further includes a switch driver coupled to the peak detector circuit and configured to adjust a control signal to the switch responsive to the detected peak amplitude.

公开(公告)号：US20180219545A1

公开(公告)日：2018-08-02

申请号：US15651897

申请日：2017-07-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Rajdeep BONDADE ,  Nathan SCHEMM ,  Rajarshi MUKHOPADHYAY

IPC: H03K17/16 ,  H03K5/1532

CPC classification number: H03K17/165 ,  H03K5/1532 ,  H03K17/0822 ,  H03K17/168 ,  H03K2217/0063 ,  H03K2217/0072

Abstract: An apparatus to monitor and control a switching rate in a switch includes a differentiator circuit including a capacitor and a configurable resistor. The differentiator circuit further includes an input terminal of the capacitors configured to receive a first voltage from a switch and a differentiator node configured to receive a differentiated voltage based on the first voltage. The apparatus includes a peak detector circuit coupled to the differentiator node and configured to detect a peak value of the differentiated voltage. The apparatus further includes a driver circuit coupled to the peak detector circuit and configured to adjust a control signal to the switch responsive to the detected peak value of the differentiated voltage.