公开(公告)号：US11343892B2

公开(公告)日：2022-05-24

申请号：US17178260

申请日：2021-02-18

Applicant: DELTA ELECTRONICS, INC.

Inventor： Tsung-Ta Wu ,  Qi-Rong Lee ,  Wei-Cheng Chiu ,  Yu-Yung Huang ,  Ching-Ho Chou

IPC: H05B45/30 ,  H05B45/355 ,  H05B47/165 ,  H05B45/40 ,  H05B45/325

Abstract: A driver is configured to provide an output voltage and an output current to a load according to an input voltage. The driver includes a power converter, first and second detecting devices and a controller. The power converter is configured to receive and convert the input voltage to the output voltage and the output current. The first detecting device is configured to detect the input voltage to generate a first signal. The second detecting device is configured to detect the output voltage to generate a second signal, and detect the output current to generate a third signal. The controller is configured to perform a calculation to the second signal and the third signal according to one of lookup tables corresponding to the first signal to generate a power value. An operation method of a driver and a light source system are also disclosed herein.

公开(公告)号：US20250098048A1

公开(公告)日：2025-03-20

申请号：US18740782

申请日：2024-06-12

Applicant: Delta Electronics, Inc.

Inventor： Ching-Ho Chou ,  Yung-Chuan Lu ,  Tsung-Ta Wu ,  Chien-Ting Lin

IPC: H05B45/325 ,  H05B45/10

Abstract: An LED driver, an LED lighting system and an operating method thereof are provided. The LED driver is for driving an LED light source and includes a strobe circuit and a DC-DC converter. The strobe circuit generates a low-frequency modulation signal. The DC-DC converter is coupled to the strobe circuit and is configured to provide an adjustable operating current to the LED light source according to a DC signal and the low-frequency modulation signal. The operating current includes a DC current signal and a low-frequency AC current signal corresponding to the DC signal and the low-frequency modulation signal respectively. A frequency of the low-frequency AC current signal is between 25 Hz and 100 Hz, and a current ripple factor, equaling a difference of a maximum value and a minimum value of the operating current divided by a sum of the maximum value and the minimum value, is less than 8%.