Patents by Inventor Liping Xiu

Liping Xiu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • LED dimming load sudden change suppression circuit
    Patent number: 10470266
    Abstract: An LED dimming load sudden change suppression circuit is applied to an LED dimming circuit. The LED dimming load sudden change suppression circuit includes a MOS transistor Q1, a sampling resistor R1, an error amplifier U1, and a DC-DC module U2, which can ensure that the total current of the LED dimming circuit is constant and avoid damage to LEDs.
    Type: Grant
    Filed: November 12, 2018
    Date of Patent: November 5, 2019
    Assignee: SI EN TECHNOLOGY (XIAMEN) LIMITED
    Inventors: Yunfeng Li, Liping Xiu
  • Power converter with bootstrap circuit
    Patent number: 9577520
    Abstract: A power converter with bootstrap circuit, the power converter has a high side switch, a low side switch, a bootstrap circuit and a bootstrap capacitor for providing a bootstrap voltage to supply a high side driver of the high side switch. The power converter receives an input voltage and provides an output voltage based on driving the high side switch and the low side switch to switch on and off. The bootstrap circuit has a first comparing circuit, a first comparing circuit, a boost circuit and a second charging circuit. The second charging circuit charges the bootstrap capacitor when a voltage difference between the input voltage and the output voltage is smaller than a voltage threshold.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: February 21, 2017
    Assignee: CHENGDU MONOLITHIC POWER SYSTEMS CO., LTD.
    Inventors: Liping Xiu, Yike Li
  • POWER CONVERTER WITH BOOTSTRAP CIRCUIT
    Publication number: 20160065072
    Abstract: A power converter with bootstrap circuit, the power converter has a high side switch, a low side switch, a bootstrap circuit and a bootstrap capacitor for providing a bootstrap voltage to supply a high side driver of the high side switch. The power converter receives an input voltage and provides an output voltage based on driving the high side switch and the low side switch to switch on and off. The bootstrap circuit has a first comparing circuit, a first comparing circuit, a boost circuit and a second charging circuit. The second charging circuit charges the bootstrap capacitor when a voltage difference between the input voltage and the output voltage is smaller than a voltage threshold.
    Type: Application
    Filed: August 27, 2015
    Publication date: March 3, 2016
    Inventors: Liping Xiu, Yike Li