公开(公告)号：US20210399622A1

公开(公告)日：2021-12-23

申请号：US17354505

申请日：2021-06-22

Applicant: Chengdu Monolithic Power Systems Co., Ltd.

Inventor： Yuedong Chen

IPC: H02M1/08 ,  H02M1/00 ,  H02M3/335

Abstract: A switching mode power supply with an adaptive setting of a threshold valley voltage. The switching mode power supply decreases a reference auxiliary current when a valley value of a primary switching voltage across a primary switch is smaller than a first threshold valley voltage. And in addition, the switching mode power supply can increase the reference auxiliary current when the valley value of the primary switching voltage is larger than a second threshold valley voltage.

公开(公告)号：US20180145026A1

公开(公告)日：2018-05-24

申请号：US15818616

申请日：2017-11-20

Applicant: Chengdu Monolithic Power Systems Co., Ltd.

Inventor： Yuedong Chen ,  Fei Xie

IPC: H01L23/525 ,  G05F1/625

CPC classification number: H01L23/5256 ,  G05F1/625

Abstract: An integrated circuit includes: a fuse; a reference resistance generator configured to receive a mode signal indicating whether the integrated circuit is working in a test mode or a normal operation mode, wherein based on the mode signal, the reference resistance generator provides a reference resistance, and wherein the reference resistance provided in the test mode is larger than the reference resistance provided in the normal operation mode; a resistance comparator coupled to the fuse and the reference resistance generator, wherein the resistance comparator compares the resistance of the fuse with the reference resistance, and generates a trimming status signal indicating whether the fuse has been trimmed; and a adjusting circuit coupled to resistance comparator and configured to adjust a circuit characteristic of the integrated circuit based on the trimming status signal.

公开(公告)号：US09912244B2

公开(公告)日：2018-03-06

申请号：US15297085

申请日：2016-10-18

Applicant: Chengdu Monolithic Power Systems Co., Ltd.

Inventor： Yuedong Chen

IPC: H02M3/335 ,  H03L7/00 ,  H02M1/08 ,  H02M1/32 ,  H02M1/00

CPC classification number: H02M3/33546 ,  H02M1/083 ,  H02M1/32 ,  H02M2001/0009 ,  H02M2001/0058 ,  H03L5/00 ,  H03L7/00 ,  Y02B70/1433 ,  Y02B70/1491 ,  Y02P80/112

Abstract: Control method and circuit for resonant converters with capacitive protection. When a resonant converter enters into a capacitive mode, a high-side switch and a low-side switch of the resonant converter are turned off. After the high-side switch and a low-side switch are turned off for N switching cycles, the high-side switch is turned on once a current sense signal flowing through a resonant inductor of the resonant converter is increased to a zero-crossing threshold during an ascent stage of the current sense signal, and the low-side switch is turned on once the current sense signal is decreased to the zero-crossing threshold during a descent stage of the current sense signal.

公开(公告)号：US09525358B2

公开(公告)日：2016-12-20

申请号：US14857405

申请日：2015-09-17

Applicant: Chengdu Monolithic Power Systems Co., Ltd.

Inventor： Yiqing Jin ,  Yuedong Chen ,  Sicong Lin

IPC: H02M3/335 ,  H02M3/337 ,  H02M1/38 ,  H02M1/00

CPC classification number: H02M3/337 ,  H02M1/38 ,  H02M3/335 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A resonant converter has a switching circuit having a first switch and a second switch, a control circuit and a resonant circuit. The control circuit has a slope sensing circuit providing a slope sense signal based on a voltage variation at the common node of the first switch and the second switch, a slope judge circuit providing a slope judge signal, and a turn-ON control circuit providing a first reset signal to adjust a first dead-time period from turning OFF the first switch to turning ON the second switch based on the slope judge signal, the slope signal, and a current flowing through the resonant tank, and providing a second reset signal to adjust a second dead-time period from turning OFF the second switch to turning ON the first switch based on the slope judge signal, the slope signal, and the current flowing through the resonant tank.

Abstract translation: 谐振转换器具有开关电路，其具有第一开关和第二开关，控制电路和谐振电路。 控制电路具有斜坡检测电路，该斜坡检测电路基于第一开关和第二开关的公共节点处的电压变化提供斜率检测信号，斜率判断电路提供斜率判断信号，以及导通控制电路， 第一复位信号，以基于所述斜率判断信号，所述斜率信号和流过所述谐振回路的电流来调节第一死区时间段，使第一开关断开以接通所述第二开关，以及将第二复位信号提供给 基于斜率判断信号，斜率信号和流过谐振回路的电流，调整第二死区时间，使第二开关断开，使第一开关接通。

公开(公告)号：US20160087544A1

公开(公告)日：2016-03-24

申请号：US14859070

申请日：2015-09-18

Applicant: Chengdu Monolithic Power Systems Co., Ltd.

Inventor： Yiqing Jin ,  Yuedong Chen ,  Sicong Lin

IPC: H02M3/335

CPC classification number: H02M3/337 ,  H02M1/32 ,  H02M3/156 ,  H02M3/157 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A switching mode power supply with resonant technology. The switching mode power supply current uses current polarity evaluation to avoid capacitive mode by triggering the capacitive protection if the evaluation indicates that the system will enter capacitive mode.

Abstract translation: 具有谐振技术的开关电源。 如果评估指示系统进入电容模式，则开关模式电源电流使用电流极性评估来避免容性模式触发电容性保护。

公开(公告)号：US20150189710A1

公开(公告)日：2015-07-02

申请号：US14585645

申请日：2014-12-30

Applicant: Chengdu Monolithic Power Systems Co., Ltd.

Inventor： Feng Lin ,  Yuedong Chen

IPC: H05B33/08

CPC classification number: H05B33/0818

Abstract: A LED driving circuit, a control circuit and associated current sensing circuit. The control circuit has a sensing circuit, an estimation circuit, an amplifying circuit, a comparing circuit, a zero-cross detection circuit and a logic circuit. The sensing circuit is configured to sense a switching current flowing through at least one switch of a switching circuit to provide a first sensing signal. The estimation circuit is configured to process the first sensing signal to provide a feedback signal, wherein the feedback signal is indicative of a average current signal flowing through a LED. An average current flowing through the LED is regulated by sensing a switching current flowing through at least one switch.

Abstract translation: LED驱动电路，控制电路和相关电流检测电路。 控制电路具有感测电路，估计电路，放大电路，比较电路，零交叉检测电路和逻辑电路。 感测电路被配置为感测流过开关电路的至少一个开关的开关电流以提供第一感测信号。 估计电路被配置为处理第一感测信号以提供反馈信号，其中反馈信号指示流过LED的平均电流信号。 通过感测流过至少一个开关的开关电流来调节流过LED的平均电流。