公开(公告)号：US11632088B2

公开(公告)日：2023-04-18

申请号：US17102455

申请日：2020-11-24

申请人： Elite Semiconductor Microelectronics Technology Inc.

发明人： Yang-Jing Huang ,  Deng-Yao Shih ,  Ya-Mien Hsu

IPC分类号： H03F3/217 ,  H03F3/45 ,  H03K5/08 ,  H02M3/156

摘要： A voltage converter comprising: a bootstrap circuit, comprising an output capacitor, an error amplifier, a charging control circuit and a charging circuit. The charging control circuit comprises: a detection circuit, configured to detect an output voltage of the output capacitor to generate a detection signal; and a power limiting circuit, configured to clamp an output voltage of the error amplifier to a specific range based on the detection signal. The charging circuit is configured to generate a charging signal according the output voltage of the error amplifier to the bootstrap circuit, to charge the output capacitor.

公开(公告)号：US11323082B2

公开(公告)日：2022-05-03

申请号：US16988727

申请日：2020-08-10

申请人： Elite Semiconductor Microelectronics Technology Inc.

发明人： Yang-Jing Huang ,  Shao-Ming Sun ,  Jhe-Jia Jhang

IPC分类号： H03F3/217 ,  H03F1/26 ,  H03F3/187 ,  H03F3/45

摘要： A class-D amplifier configured to adjust at least one input signal to at least one output signal. The class-D amplifier comprises: a loop filter, configured to receive the input signal; a PWM circuit, configured to generate at least one PWM signal; a summing circuit, coupled between an output of the loop filter and an input of the PWM circuit; an output circuit operating at a supply voltage, configured to generate the output signal responding to the PWM signal; and a supply voltage filter, configured to monitor the supply voltage to generate a filtered signal to the summing circuit. The summing circuit is configured to sum the output of the loop filter and the filtered signal to adjust a common-mode level of the input of the PWM circuit.

公开(公告)号：US20220166394A1

公开(公告)日：2022-05-26

申请号：US17102455

申请日：2020-11-24

申请人： Elite Semiconductor Microelectronics Technology Inc.

发明人： Yang-Jing Huang ,  Deng-Yao Shih ,  Ya-Mien Hsu

IPC分类号： H03F3/217 ,  H03F3/45 ,  H02M3/156 ,  H03K5/08

摘要： A voltage converter comprising: a bootstrap circuit, comprising an output capacitor, an error amplifier, a charging control circuit and a charging circuit. The charging control circuit comprises: a detection circuit, configured to detect an output voltage of the output capacitor to generate a detection signal; and a power limiting circuit, configured to clamp an output voltage of the error amplifier to a specific range based on the detection signal . The charging circuit is configured to generate a charging signal according the output voltage of the error amplifier to the bootstrap circuit, to charge the output capacitor.

公开(公告)号：US11211903B1

公开(公告)日：2021-12-28

申请号：US17087643

申请日：2020-11-03

申请人： Elite Semiconductor Microelectronics Technology Inc.

发明人： Ya-Mien Hsu ,  Deng-Yao Shih ,  Yang-Jing Huang

IPC分类号： H03F3/217 ,  H03F1/52 ,  H03F3/38

摘要： An over charge protection method applied to a voltage converter which can operate in a quaternary modulation mode (Q mode) or a ternary modulation mode (T mode). The over charge protection method comprises: (a) determining whether the voltage converter operates in the Q mode or the T mode; and (b) setting a current threshold of the voltage converter to a first over current threshold if the voltage converter operates in the T mode; and (c) setting the current threshold to a second over current threshold if the voltage converter operates in the Q mode, wherein the first current threshold is smaller than the second over current threshold.