公开(公告)号：US20240413748A1

公开(公告)日：2024-12-12

申请号：US18331181

申请日：2023-06-08

Applicant: Novatek Microelectronics Corp.

Inventor： Tuo-Kuang Chen ,  Lo Pang-Yen Ting ,  Nien-Hsiu Yen

IPC: H02M3/156

Abstract: A power converting device includes a power transistor, a detecting device, a signal converter and a controller. The detecting device obtains a detection voltage by detecting an output voltage on the output end of the power converting device and a detection current by detecting an operation current of the power transistor. The signal converter converts the detection voltage from a first format to a second format, and converts the detection current from the first format to the second format. The controller receives the detection voltage and the detection current in the second format. Wherein the controller compares the detection voltage with a first voltage threshold value and a second voltage threshold value to adjust a control code, and generates a control signal to a control end of the power transistor according to the control code.

公开(公告)号：US20240405658A1

公开(公告)日：2024-12-05

申请号：US18325080

申请日：2023-05-29

Applicant: Novatek Microelectronics Corp.

Inventor： Tuo-Kuang Chen ,  Jui-Chi Chang ,  Yi-Meng Lan ,  Yi-Chun Lee

IPC: H02M1/00 ,  H02M3/07 ,  H02M3/156

Abstract: A power supply device and an operation method thereof are provided. The power supply device includes a charge pump circuit and a power supply circuit. The power supply circuit supplies a first power voltage to the charge pump circuit. The charge pump circuit converts the first power voltage into a second power voltage so as to supply the second power voltage to an application circuit. The power supply circuit detects the second power voltage or an output current output by the charge pump circuit to obtain a detection result. The power supply circuit dynamically adjusts the first power voltage based on the detection result.

公开(公告)号：US11032886B2

公开(公告)日：2021-06-08

申请号：US16932858

申请日：2020-07-20

Applicant: Novatek Microelectronics Corp.

Inventor： Tuo-Kuang Chen ,  Hsiang-Yi Chiu ,  Chiun-He Lin ,  Yao-Cheng Lin

IPC: H05B45/325 ,  H05B45/10

Abstract: The invention provides a light-emitting diode (LED) driver and a driving method thereof. The LED driver includes a brightness code calculation circuit, a driving current generation circuit and a control circuit. The brightness code calculation circuit is configured to to receive a pulse width modulation (PWM) signal and perform a calculation operation comprising calculating a duty cycle of the PWM signal with respect to a period of the PWM signal and generating a brightness code according to the duty cycle of the PWM signal. The driving current generation circuit is configured to generate a driving current according to the brightness code. The control circuit is configured to detect a plurality of brightness codes generated by the brightness code calculation circuit repeatedly performing the calculation operation and determine whether or not to adjust an execution frequency of the calculation operation of the brightness code calculation circuit according to the brightness codes.

公开(公告)号：US20210037625A1

公开(公告)日：2021-02-04

申请号：US16932858

申请日：2020-07-20

Applicant: Novatek Microelectronics Corp.

Inventor： Tuo-Kuang Chen ,  Hsiang-Yi Chiu ,  Chiun-He Lin ,  Yao-Cheng Lin

IPC: H05B45/325 ,  H05B45/10

Abstract: The invention provides a light-emitting diode (LED) driver and a driving method thereof. The LED driver includes a brightness code calculation circuit, a driving current generation circuit and a control circuit. The brightness code calculation circuit is configured to to receive a pulse width modulation (PWM) signal and perform a calculation operation comprising calculating a duty cycle of the PWM signal with respect to a period of the PWM signal and generating a brightness code according to the duty cycle of the PWM signal. The driving current generation circuit is configured to generate a driving current according to the brightness code. The control circuit is configured to detect a plurality of brightness codes generated by the brightness code calculation circuit repeatedly performing the calculation operation and determine whether or not to adjust an execution frequency of the calculation operation of the brightness code calculation circuit according to the brightness codes.