公开(公告)号：US10088856B2

公开(公告)日：2018-10-02

申请号：US15588089

申请日：2017-05-05

Applicant: Texas Instruments Incorporated

Inventor： Alvin Xu ,  Qingjie Ma ,  Yang Wang ,  Yan He ,  Jun Ma ,  Zhenghao Cui ,  Jingwei Xu

IPC: G05F1/56 ,  G05F1/567 ,  G05F3/30

Abstract: Methods, apparatus, systems and articles of manufacture for negative output voltage active clamping using a floating bandgap reference and temperature compensation are disclosed. An example load switch includes a floating bandgap reference circuit to generate a bandgap reference voltage. A resistor divider is to generate a resistor divider voltage. A temperature compensator to apply a temperature compensation current to the resistor divider to create a temperature compensated resistor divider voltage. A power transistor is to be enabled when the temperature compensated resistor divider voltage is less than the bandgap reference voltage. The example load switch can work under negative output voltage clamping and get better accuracy drain to source clamped voltage of power transistor for inductive load condition.

公开(公告)号：US11659638B2

公开(公告)日：2023-05-23

申请号：US17463239

申请日：2021-08-31

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Yan He ,  Yang Wang ,  Haibin Shao ,  Shang Ding ,  Wei Xu ,  Qingjie Ma

IPC: H05B45/325 ,  H05B45/34 ,  G05B23/02 ,  G09G3/32

CPC classification number: H05B45/325 ,  G05B23/0218 ,  G09G3/32 ,  H05B45/34 ,  G09G2310/0267 ,  G09G2320/0219

Abstract: A light emitting diode (LED) matrix driver includes a scan line switch coupled to a scan line of an LED matrix and adapted to be coupled to a signal ground; a first voltage clamp coupled to the scan line switch and the scan line; and a second voltage clamp coupled to the scan line.

公开(公告)号：US11423828B2

公开(公告)日：2022-08-23

申请号：US17135906

申请日：2020-12-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Haibin Shao ,  Yan He ,  Qingjie Ma ,  Wei Xu

IPC: G09G3/32 ,  G09G5/10

Abstract: A light-emitting diode (LED) display driver circuit includes: a set of channels, each channel of the set of channels having a respective current control circuit; and control circuitry coupled to each respective current control circuit and configured to adjust a respective control signal to each respective current control circuit responsive to an LED brightness estimate for each channel of the set of channels.

公开(公告)号：US11386834B2

公开(公告)日：2022-07-12

申请号：US17122792

申请日：2020-12-15

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Yang Wang ,  Huibo Zhong ,  Haibin Shao ,  Yan He ,  Shang Ding ,  Yongxiang Zhang

IPC: G09G3/32

Abstract: A light-emitting diode (LED) display driver circuit includes: a set of scan lines, each scan line having a respective switch; a set of channels coupled to each scan line of the set of scan lines; and a scan line controller coupled to each respective switch of the set of scan lines, the scan line controller configured to provide a programmable sequence of control signals to respective switches of the set of scan lines.