专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

41. 发明授权

US11205947B2 Multi-input single-output DC-DC converter, control circuit and control method thereof 有权
公开(公告)号：US11205947B2
公开(公告)日：2021-12-21
申请号：US16423317
申请日：2019-05-28
申请人： Silergy Semiconductor Technology (Hangzhou) LTD
发明人： Wei Chen , Liangwei Sun
IPC分类号： H02M1/08 , H02M1/00 , H02M3/158 , H02M3/335
摘要： A multi-input single-output DC-DC converter can include: a plurality of input circuits and an output circuit, where each input circuit includes a first switch, and one terminal of each of the input circuits is coupled to an input source, and the other terminal of the input circuit is coupled to the output circuit; and a control circuit configured to control operation periods of each input circuit in one switching period, in order to achieve power distribution and reach requirements for input currents of the input circuit and an output signal of the output circuit.

42. 发明申请

US20210227664A1 POWER CONVERTER 有权
公开(公告)号：US20210227664A1
公开(公告)日：2021-07-22
申请号：US17147640
申请日：2021-01-13
申请人： Silergy Semiconductor Technology (Hangzhou) LTD
发明人： Jian Li , Wei Chen
IPC分类号： H05B45/385 , H02M1/08 , H02M3/335 , H05B45/345 , H05B45/34
摘要： A power converter can include: an input circuit, including a primary winding and a primary power switch which are coupled in series between an input terminal and a first ground; at least one constant voltage output circuit, including a first secondary winding coupled with said primary winding; and at least one constant current output circuit, including a second secondary winding coupled with said primary winding, a secondary power switch, a current output port, a second rectifier circuit and a current sampling circuit. The second rectifier circuit can be coupled between the current output port and the second secondary winding, the current output port can be coupled to an LED as a load, the LED may be coupled between one end of the second secondary winding and a second ground, and the secondary power switch and the current sampling circuit can connect in series.

43. 发明授权

US10396597B2 Driving circuit and wireless power transmitter including the same 有权
公开(公告)号：US10396597B2
公开(公告)日：2019-08-27
申请号：US15211023
申请日：2016-07-15
申请人： Silergy Semiconductor Technology (Hangzhou) Ltd.
发明人： Wang Zhang , Wei Chen , Chen Zhao
IPC分类号： H02J50/12 , H02J7/02
摘要： The present disclosure relates to a driving circuit and a wireless power transmitter including the same. In view of the fact that a transmitter-side coupling circuit exhibits a high resistance when an AC current having a frequency far away from its operating frequency is applied to input terminals, the present disclosure connects a plurality of transmitter-side coupling circuits which operates at different operating frequencies in parallel at output terminals of the same inverting circuit. The controller controls an operating frequency of the AC current output from the inverting circuit to drive different one of the transmitter-side coupling circuits to operate. Thus, one driving circuit can drive the transmitter-side coupling circuits which operate at different operating frequencies or under different technical standards to supply electric energy. The driving circuit is compatible with wireless power receivers which operate at different operating frequencies, and thus has improved compatibility.

44. 发明授权

US09979301B2 Control method and control circuit for switching power supply 有权
公开(公告)号：US09979301B2
公开(公告)日：2018-05-22
申请号：US15429508
申请日：2017-02-10
申请人： Silergy Semiconductor Technology (Hangzhou) LTD
发明人： Huiqiang Chen , Yunlong Han , Xiaoru Xu , Wei Chen
IPC分类号： H02M3/335
CPC分类号： H02M3/33507 , H02M3/33523 , H03K17/04213
摘要： In one embodiment, a method of controlling a switching power supply, can include: (i) generating a driving current signal that follows a waveform of a sense voltage signal, where the sense voltage signal is related to a current through a collector of a transistor that is configured as a power switch of the switching power supply, where the collector is coupled to an inductive element of the switching power supply; (ii) providing the driving current signal to a base of the transistor, where the transistor is in a saturated conduction state when a pulse-width modulation (PWM) signal is active; and (iii) releasing charge accumulated on the base when the PWM signal is inactive to turn off the transistor.

45. 发明授权

US09924569B2 LED driving circuit 有权
公开(公告)号：US09924569B2
公开(公告)日：2018-03-20
申请号：US15194070
申请日：2016-06-27
申请人： Silergy Semiconductor Technology (Hangzhou) LTD
发明人： Jianxin Wang , Hongbin Lai , Wei Chen
IPC分类号： H05B33/08
CPC分类号： H05B33/0815 , H05B33/0827 , H05B33/086 , Y02B20/347
摘要： An LED driving circuit for driving an LED load including N LED strings, where N is a positive integer no less than 2, can include: (i) a power converter having a power switch; (ii) a constant current control circuit that controls a switching operation of the power switch such that the power converter generates a driving current for the LED load; (iii) N control switches respectively coupled in series to the N LED strings; (iv) a PWM signal generator configured to generate N color tuning PWM signals; and (v) a color tuning control circuit configured to output N switching control signals according to the N color tuning PWM signals, to control switching operations of the N control switches, to regulate a ratio of a current through each LED string of the LED load to the driving current, and to regulate the color temperature of the LED load.

46. 发明授权

US09907130B2 High-efficiency LED driver and driving method 有权
公开(公告)号：US09907130B2
公开(公告)日：2018-02-27
申请号：US14873407
申请日：2015-10-02
申请人： Silergy Semiconductor Technology (Hangzhou) LTD
发明人： Wei Chen
IPC分类号： H05B33/08
CPC分类号： H05B33/0818 , H05B33/0815
摘要： Disclosed are LED driver circuits, and methods of driving LED loads. In one embodiment, an LED driver can include: (i) an SCR coupled to an AC power supply, and configured to generate a DC voltage through a first rectifier circuit; (ii) a first stage conversion circuit having an isolated topology with power factor correction, where the first stage conversion circuit is configured to convert the DC voltage to a first output voltage; (iii) where the first stage conversion circuit includes a transformer having a primary side coupled to the DC voltage, and a secondary side coupled to the first output voltage through a second rectifier circuit; and (iv) a second stage conversion circuit having a non-isolated topology, where the second stage conversion circuit is configured to convert the first output voltage to an output current configured to drive an LED load based on a conducting angle of the SCR.

47. 发明授权

US09871441B2 Current feedback method, current feedback circuit, driving circuit and switching power supply thereof 有权
公开(公告)号：US09871441B2
公开(公告)日：2018-01-16
申请号：US14944367
申请日：2015-11-18
申请人： Silergy Semiconductor Technology (Hangzhou) LTD
发明人： Guojia Liu , Wei Chen
IPC分类号： H02M3/156 , G05F3/26 , H03K7/08 , H02M1/00
CPC分类号： H02M3/156 , G05F3/26 , H02M2001/0009 , H03K7/08
摘要： In one embodiment, a current feedback circuit can include: (i) a first current mirror circuit having an input terminal coupled to a source of a main power transistor of a switching power supply, and a control terminal configured to receive a PWM control signal, the first current mirror circuit being configured to generate a first mirror current; (ii) the first current mirror circuit and the main power transistor being on such that an output sampling current flows through the first current mirror circuit and the main power transistor when the PWM control signal is active; and (iii) a second current mirror circuit configured to generate an output feedback current that is in a predetermined direct proportion with the output sampling current, and is generated in accordance with the first mirror current.

48. 发明授权

US09729068B2 Switching mode converter 有权
公开(公告)号：US09729068B2
公开(公告)日：2017-08-08
申请号：US15172544
申请日：2016-06-03
申请人： Silergy Semiconductor Technology (Hangzhou) Ltd.
发明人： Wei Chen
IPC分类号： H02M3/335 , H05B33/08
CPC分类号： H02M3/33523 , H02M3/33561 , H02M3/33576 , H05B33/0815 , H05B33/0845
摘要： The present disclosure relates to a switching mode converter. A secondary-side power switch is connected in series in a second output circuit, and an output voltage of a second secondary-side winding is fed back to a first secondary-side winding with a value less than an output voltage of the first secondary-side winding. Thus, a freewheeling current flows completely through the secondary-side winding of the second output circuit when the secondary-side power switch is turned on, and flows through secondary-side windings of other output circuits when the secondary-side power switch is turned off. The freewheeling current flows in a time division manner in each switching cycle for the constant current output circuit and for the constant voltage output circuit. Only one stage of power conversion is needed for multiple constant current/voltage outputs. The switching mode converter increases conversion efficiency, and reduces size because only one group of magnetic components is used.

49. 发明申请

US20170135187A1 WIRELESS LED DRIVER 有权
公开(公告)号：US20170135187A1
公开(公告)日：2017-05-11
申请号：US15341235
申请日：2016-11-02
申请人： Silergy Semiconductor Technology (Hangzhou) LTD
发明人： Wang Zhang , Wei Chen , Chen Zhao
IPC分类号： H05B37/02 , H05B33/08
CPC分类号： H05B37/0272 , H05B33/0812 , H05B33/0815 , H05B33/0845
摘要： A wireless LED driver can include: an electrical energy transmitter comprising an inverter circuit coupled to receive an input power supply, and being configured to convert a received voltage signal to an AC signal; the electrical energy transmitter comprising N transmitter coupling circuits coupled to the inverter circuit, and being configured to be driven by the AC signal; an electrical energy receiver comprising M receiver coupling circuits coupled to the transmitter coupling circuits in a contactless mode, and being configured to receive the AC signal; and the electrical energy receiver comprising M rectifier circuits coupled to the receiver coupling circuits one by one, where each the rectifier circuit is configured to convert the AC signal to a DC signal to drive an LED load coupled to output terminals of the rectifier circuit, and where N and M are integers not less than 1.

50. 发明授权

US09331588B2 Control circuits and control methods for flyback converters and AC-DC power converters thereof 有权
标题翻译：用于反激式转换器及其AC-DC电力转换器的控制电路和控制方法
公开(公告)号：US09331588B2
公开(公告)日：2016-05-03
申请号：US13868942
申请日：2013-04-23
申请人： Silergy Semiconductor Technology (Hangzhou) LTD
发明人： Wei Chen
IPC分类号： H02M3/335 , H02M1/42
CPC分类号： H02M3/33523 , H02M1/4258 , Y02B70/126
摘要： The present invention relates to control circuits and methods for a flyback converter and AC-DC power converters thereof. In one embodiment, a control circuit can include: (i) a turn-on signal generating circuit that is configured, in each switching cycle, to receive a drain-source voltage of a power switch of the flyback converter, and to activate a turn-on signal to turn on the power switch when the drain-source voltage reaches a valley value; (ii) a turn-off signal generating circuit that is configured, in each switching cycle, to activate a turn-off signal to turn off the power switch based on a power switch feedback error signal after a power switch conducting time interval has elapsed; and (iii) where input current and voltages of the flyback converter can be maintained as substantially in phase, and an output electrical signal of the flyback converter can be maintained as substantially constant.
摘要翻译：本发明涉及用于反激式转换器及其AC-DC电力转换器的控制电路和方法。在一个实施例中，控制电路可以包括：（i）导通信号发生电路，其被配置为在每个开关周期中接收反激式转换器的电源开关的漏 - 源电压，并且激活转向 - 当漏源电压达到谷值时，接通电源开关的信号; （ii）关闭信号发生电路，其被配置为在每个开关周期中，在电力开关导通时间间隔已经过去之后，基于功率开关反馈误差信号来激活关断信号来关闭电源开关; 和（iii）其中反激式转换器的输入电流和电压可以保持为基本上同相，并且反激转换器的输出电信号可以保持为基本恒定。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式