公开(公告)号：US20210029788A1

公开(公告)日：2021-01-28

申请号：US16518316

申请日：2019-07-22

申请人： O2Micro, Inc.

发明人： Rong HU ,  Yung-Lin LIN ,  Hiroshi YAMAZAKI ,  Naoyuki FUJITA

IPC分类号： H05B33/08 ,  H05B39/04

摘要： A controller for controlling a light source module including a first LED array and a second LED array includes a power input terminal, a first power output terminal and a second power output terminal. The power input terminal is operable for receiving electric power from a power converter. The first power terminal is coupled to the first LED array, and the second power output terminal is coupled to the second LED array. The controller is operable for delivering the electric power to the first LED array via the first power output terminal in a first sequence of discrete time slots, and for delivering the electric power to the second LED array via the second power output terminal in a second sequence of discrete time slots. The first sequence of discrete time slots and the second sequence of discrete time slots are mutually exclusive.

公开(公告)号：US20240163988A1

公开(公告)日：2024-05-16

申请号：US18422979

申请日：2024-01-25

申请人： O2Micro, Inc.

发明人： Rong HU ,  Yung-Lin LIN ,  Naoyuki FUJITA

IPC分类号： H05B45/14 ,  H05B45/397 ,  H05B45/46

CPC分类号： H05B45/14 ,  H05B45/397 ,  H05B45/46

摘要： A controller for controlling a light source module including a first LED array and a second LED array includes a first driving terminal and a second driving terminal. The controller is operable for turning on a switch between a power converter and the first LED array by the first driving terminal to deliver electric power from the power converter to the first LED array in a first sequence of discrete time slots, and for turning on a second switch between the power converter and the second LED array by the second driving terminal to deliver electric power from the power converter to the second LED array in a second sequence of discrete time slots, where the first sequence of discrete time slots and the second sequence of discrete time slots are mutually exclusive.

公开(公告)号：US20230136279A1

公开(公告)日：2023-05-04

申请号：US17518466

申请日：2021-11-03

申请人： O2Micro Inc.

发明人： Ching-Chuan KUO ,  Sin-Yan WU ,  Sheng-Tai LEE ,  Yung-Lin LIN

IPC分类号： H02M3/337

摘要： A controller includes a first sensing pin receiving a first sensing signal indicating a level of an input voltage of a resonant converter, a second sensing pin receiving a second sensing signal indicating a level of an input current of the resonant converter, a feedback pin receiving a feedback signal indicating a level of an output voltage of the resonant converter, and a first driving pin and a second driving pin controlling a high side switch and a low side switch of the resonant converter, respectively. The controller generates a compensated signal based on the first sensing signal, compares the compensated signal with a peak value of the second sensing signal to generate a first comparison result, compares the feedback signal with a threshold to generate a second comparison result, and controls the high side low side switches based on the first and the second comparison results.

公开(公告)号：US20150022109A1

公开(公告)日：2015-01-22

申请号：US14509711

申请日：2014-10-08

申请人： O2Micro Inc.

发明人： Sheng-Tai LEE ,  Ching-Chuan KUO ,  Yung-Lin LIN

IPC分类号： H05B33/08

CPC分类号： H05B33/0845 ,  H05B33/0812 ,  H05B33/0818 ,  H05B33/0848 ,  H05B33/0851 ,  Y02B20/345

摘要： A driving circuit includes a power converter, a dimming controller and a current path coupled to the dimming controller. The power converter receives input power from a rectifier and provides output power to a light source. A power switch transfers power from an AC power source to the rectifier when the power switch is on. The dimming controller receives a switch monitoring signal indicative of the state of the power switch. An average current flowing through the light source has a first value if the power switch is on. The dimming controller is operable for adjusting the average current based on the switch monitoring signal. A current flows from the AC power source through the current path to ground when the power switch is off.

摘要翻译： 驱动电路包括功率转换器，调光控制器和耦合到调光控制器的电流通路。 功率转换器从整流器接收输入功率并向光源提供输出功率。 当电源开关打开时，电源开关将电源从交流电源传输到整流器。 调光控制器接收指示电源开关状态的开关监视信号。 如果电源开关接通，则流过光源的平均电流具有第一值。 调光控制器可操作用于基于开关监视信号调整平均电流。 当电源开关关闭时，电流从交流电源流过电流路径到地。

公开(公告)号：US20210259073A1

公开(公告)日：2021-08-19

申请号：US17313709

申请日：2021-05-06

申请人： O2Micro, Inc.

发明人： Rong HU ,  Yung-Lin LIN ,  Naoyuki FUJITA

IPC分类号： H05B45/14 ,  H05B45/46 ,  H05B45/397

摘要： A controller for controlling a light source module including a first LED array and a second LED array includes a first driving terminal and a second driving terminal. The controller is operable for turning on a switch between a power converter and the first LED array by the first driving terminal to deliver electric power from the power converter to the first LED array in a first sequence of discrete time slots, and for turning on a second switch between the power converter and the second LED array by the second driving terminal to deliver electric power from the power converter to the second LED array in a second sequence of discrete time slots, where the first sequence of discrete time slots and the second sequence of discrete time slots are mutually exclusive.

公开(公告)号：US20190254130A1

公开(公告)日：2019-08-15

申请号：US15414003

申请日：2017-01-24

申请人： O2Micro, Inc.

发明人： Jen-Chun Chen ,  Sheng-Tai LEE ,  Yung-Lin LIN

IPC分类号： H05B33/08 ,  H02M3/335

CPC分类号： H05B33/0815 ,  H02M3/33576 ,  H02M2001/0009 ,  H05B33/0827 ,  H05B33/083 ,  H05B33/0851

摘要： A system for driving a light source includes a power converter and control circuitry coupled to the power converter. The power converter converts input power to an output voltage to power the light source. The control circuitry senses the output voltage and senses current of the light source. The control circuitry generates a control signal based on a voltage feedback signal indicative of a combination of said output voltage and said current of said light source, and controls the power converter by the control signal to adjust the output voltage.