公开(公告)号：US11955821B2

公开(公告)日：2024-04-09

申请号：US18142525

申请日：2023-05-02

申请人： O2Micro, Inc.

发明人： Guoxing Li

IPC分类号： H02J7/00 ,  H02J7/36

CPC分类号： H02J7/0024 ,  H02J7/0013 ,  H02J7/36

摘要： In a portable device, a first battery has a positive terminal coupled to, through a first switch, an interface used to receive input power, and a negative terminal coupled to a reference terminal. A second battery has a positive terminal coupled to the interface, and a negative terminal coupled to the reference terminal through a second switch, and to the first battery's positive terminal through a third switch. A control circuitry controls the switches such that the device has multiple operation modes including at least a one-battery charging mode and a two-battery-in-series charging mode. In the one-battery charging mode, the circuitry turns off the third switch, and controls the other switches such that one battery is charged by the input power. In the two-battery-in-series charging mode, the control circuitry turns on the third switch and turns off the other switches, such that two batteries are charged by the input power.

公开(公告)号：US20230402664A1

公开(公告)日：2023-12-14

申请号：US18237840

申请日：2023-08-24

申请人： O2Micro Inc.

发明人： Yan LI ,  Weidong XUE

IPC分类号： H01M10/42 ,  G01R19/165 ,  G01R31/3835 ,  G01R31/396 ,  H02J7/00 ,  H03K5/24

CPC分类号： H01M10/4264 ,  G01R19/16542 ,  G01R31/3835 ,  G01R31/396 ,  H02J7/0019 ,  H03K5/24 ,  H02J7/0016 ,  H01M2010/4278 ,  H01M2010/4271

摘要： An open cell detection system includes a battery management system. The battery management system includes a control unit that transmits an open cell detection signal, to enable a balance unit for a first time period and to disable it for a second time period, and to enable an under-voltage comparison unit and an over-voltage comparison unit for a third time period. The under-voltage comparison unit compares a voltage with a first open cell threshold and outputs a first comparison result in the third time period. The over-voltage comparison unit compares a voltage with a second open cell threshold and outputs a second comparison result in the third time period. A judging unit determines whether a connection between a first battery unit and the battery management system is inoperative based on the first and second comparison results.

公开(公告)号：US11768245B2

公开(公告)日：2023-09-26

申请号：US17382213

申请日：2021-07-21

申请人： O2Micro, Inc.

发明人： Guoxing Li

IPC分类号： G01R31/367 ,  G01R31/374 ,  G01R31/3842

CPC分类号： G01R31/367 ,  G01R31/374 ,  G01R31/3842

摘要： In a status detection system, a data acquisition circuit monitors statuses of a battery to generate status data. A storage medium stores a set of lookup tables. A lookup table of the lookup tables includes a set of datasets corresponding to a set of time frames. Each dataset includes digital values of parameters of the battery obtained in a corresponding time frame of the time frames. A controller receives the status data and updates the lookup tables based on the status data. The controller also obtains a current dataset of the parameters based on the status data, searches the lookup table for a previous dataset that matches the current dataset, compares a current value of a parameter in the current dataset with a previous value of the parameter in the previous dataset, and determines whether a potential fault is present in the battery based on a result of the comparison.

公开(公告)号：US11677260B2

公开(公告)日：2023-06-13

申请号：US16597306

申请日：2019-10-09

申请人： O2Micro, Inc.

发明人： Guoxing Li

IPC分类号： H02J7/36 ,  H02J7/00

CPC分类号： H02J7/36 ,  H02J7/0013

摘要： In a portable device, a first battery has a positive terminal coupled to, through a first switch, an interface used to receive input power, and a negative terminal coupled to a reference terminal. A second battery has a positive terminal coupled to the interface, and a negative terminal coupled to the reference terminal through a second switch, and to the first battery's positive terminal through a third switch. A control circuitry controls the switches such that the device has multiple operation modes including at least a one-battery charging mode and a two-battery-in-series charging mode. In the one-battery charging mode, the circuitry turns off the third switch, and controls the other switches such that one battery is charged by the input power. In the two-battery-in-series charging mode, the control circuitry turns on the third switch and turns off the other switches, such that two batteries are charged by the input power.

公开(公告)号：US11073565B2

公开(公告)日：2021-07-27

申请号：US16280828

申请日：2019-02-20

申请人： O2Micro, Inc.

发明人： Sterling Du ,  Yong Song ,  Yi Yuan ,  Ruobing Ren

IPC分类号： G01R31/3842 ,  G01R31/36

摘要： A method for calculating a remaining capacity of a battery includes: recording a sleep time of a battery monitor in sleep mode; reading an open circuit voltage measured and stored in sleep mode when the sleep time is greater than a preset time period and determining a first remaining capacity ratio based on the open circuit voltage; calculating charges consumed based on a preset current and the sleep time; calculating a second remaining capacity ratio based on charges consumed, a stored first remaining capacity value and a preset total capacity; reading values of battery parameters; determining a third remaining capacity ratio based on the values of battery parameters; and determining a current remaining capacity ratio based on the first remaining capacity ratio, the second remaining capacity ratio and the third remaining capacity ratio.

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：US10893591B2

公开(公告)日：2021-01-12

申请号：US16846092

申请日：2020-04-10

申请人： O2Micro, Inc.

发明人： Sheng-tai Lee ,  Kaiping Ran

IPC分类号： H05B45/34 ,  H05B45/345 ,  H05B45/10 ,  H05B45/24 ,  H05B45/395 ,  H05B45/00 ,  H05B45/14

摘要： A controller includes a voltage detection terminal, a current detection terminal and a voltage sensing terminal. The voltage detection terminal senses a second output voltage. The current detection terminal senses a current of a light source. The second output voltage is sensed prior to the current of the light source. The voltage sensing terminal receives a voltage sensing signal indicative of a first output voltage. The controller adjusts the voltage sensing signal based on the second output voltage, to enable the second output voltage in a preset voltage range; when the second output voltage is in the preset voltage range, the controller adjusts the adjusted voltage sensing signal based on a difference between the current of the light source and a target current value, to enable the current of the light source to maintain the target current value.

公开(公告)号：US10534037B2

公开(公告)日：2020-01-14

申请号：US15939091

申请日：2018-03-28

申请人： O2Micro Inc.

发明人： Yi Yuan ,  Yingguo Zhang ,  Zhibin Hua ,  Hua-Yi Wang ,  Ping Liu

IPC分类号： G01R31/36 ,  G01R31/382 ,  G06F17/00 ,  G01R19/165 ,  G01R31/3842

摘要： A device includes an interface and a processor. The interface receives information for a parameter indicative of a status of a battery. The processor calculates a remaining capacity of the battery, calculates a capacity ratio of the calculated remaining capacity to a capacity reference of the battery, compares the parameter with a parameter reference to generate a first comparison result, compares the capacity ratio with a ratio reference to generate a second comparison result, sets an amount according to the first and second comparison results, and changes the calculated remaining capacity by the amount.

公开(公告)号：US10277052B2

公开(公告)日：2019-04-30

申请号：US15823011

申请日：2017-11-27

申请人： O2Micro Inc.

发明人： Guoxing Li

IPC分类号： H02J7/04 ,  H02J7/16 ,  H02J7/00

摘要： A controller for controlling power delivery to a battery includes a first terminal that provides a first signal to enable a bypass path to deliver power from an interface to charge the battery, and includes a second terminal that provides a second signal to enable a conversion circuit to convert input power received at the interface to output power to charge the battery. The controller also includes circuitry that determines whether a first adapter or a second adapter is connected to the interface, generates the second signal if the second adapter is connected to the interface, generates the first signal and a request if the first adapter is connected to the interface, and provides the request to the first adapter through the interface. The request includes information indicative of a target level and an instruction that causes the first adapter to provide power at the target level to the interface.

公开(公告)号：US10075074B2

公开(公告)日：2018-09-11

申请号：US15498236

申请日：2017-04-26

申请人： O2Micro, Inc.

发明人： Gang Li ,  Fengjiang Zhang ,  Guoyong Guo

IPC分类号： H02M3/156 ,  H02M3/158 ,  H02M1/36 ,  H02M1/00

CPC分类号： H02M3/158 ,  H02M1/00 ,  H02M1/36 ,  H02M3/156 ,  H02M3/1584 ,  H02M2001/0003 ,  H02M2003/1566 ,  H02M2003/1586

摘要： In a controller for a DC to DC converter, PWM signal generating circuitry generates a set of PWM signals phase-shifted relative to one another, and controls states of the PWM signals according to a set of control signals. Each PWM signal of the PWM signals has an on-time state and an off-time state. Ramp signal generating circuitry, coupled to the PWM signal generating circuitry, generates a set of ramp signals having substantially the same ramp slope. Each ramp signal of the ramp signals is generated in response to detecting an on-time state of a corresponding PWM signal of the PWM signals. Additionally, a comparing circuit, coupled to the PWM and ramp signal generating circuitry, alternately compares the ramp signals with a preset reference to generate the control signals. A corresponding control signal of the control signals changes the corresponding PWM signal from the on-time state to an off-time state.