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公开(公告)号：US10298007B2
公开(公告)日：2019-05-21
申请号：US15670648
申请日：2017-08-07
发明人： Li Xiang , Xiaodong Fan
摘要： A digital power supply protection circuit includes: a signal preprocessing circuit, configured to receive an overcurrent signal and a first inceptive impulse clock timing, and perform preprocessing on the overcurrent signal according to the first inceptive impulse clock timing so as to obtain a first reference signal a signal generation circuit, configured to receive the first inceptive impulse clock timing, count time duration between a rising edge of the first inceptive impulse clock timing and a rising edge of the first reference signal so as to obtain a first time duration, and upon the first time duration is greater than a second time duration, generate a first disabling signal by delaying the rising edge of the first inceptive impulse clock timing for the second time duration; and a clock timing adjustment circuit, configured to adjust the first inceptive impulse clock timing according to the first disabling signal.
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公开(公告)号：US20170338647A1
公开(公告)日：2017-11-23
申请号：US15670648
申请日：2017-08-07
发明人： Li XIANG , Xiaodong Fan
CPC分类号： H02H7/0858 , H02H7/0838 , H02H7/12 , H02M1/32 , H02M1/40 , H02M3/337
摘要： A digital power supply protection circuit includes: a signal preprocessing circuit, configured to receive an overcurrent signal and a first inceptive impulse clock timing, and perform preprocessing on the overcurrent signal according to the first inceptive impulse clock timing so as to obtain a first reference signal a signal generation circuit, configured to receive the first inceptive impulse clock timing, count time duration between a rising edge of the first inceptive impulse clock timing and a rising edge of the first reference signal so as to obtain a first time duration, and upon the first time duration is greater than a second time duration, generate a first disabling signal by delaying the rising edge of the first inceptive impulse clock timing for the second time duration; and a clock timing adjustment circuit, configured to adjust the first inceptive impulse clock timing according to the first disabling signal.
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公开(公告)号：US09621146B2
公开(公告)日：2017-04-11
申请号：US14586109
申请日：2014-12-30
发明人： Xiaodong Fan
CPC分类号： H03K7/06 , H02M3/1584
摘要： A digital current equalization method includes: acquiring a current value from a counter preset value loading module in each synchronization period; generating a continuous variable frequency pulse according to the current value, and receiving a synchronization signal transmitted by a phase inverter connected to the PFM generator; transmitting, according to the synchronization signal, the continuous variable frequency pulse to the digital current equalization bus through an OC gate of a triode connected to the PFM generator; counting a frequency of the continuous variable frequency pulse on the digital current equalization bus, where an acquired frequency count value is used to represent a current magnitude of a power supply module, which currently outputs a greatest current, of the foregoing power supply module and a power supply module connected in parallel with the foregoing power supply module to accordingly adjust the output current of the foregoing power supply module.
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公开(公告)号：US20150236596A1
公开(公告)日：2015-08-20
申请号：US14586309
申请日：2014-12-30
发明人： Xiaodong Fan
IPC分类号： H02M3/335
CPC分类号： H02M3/33507 , H02M3/33523 , H02M3/33592 , H02M2001/0025 , H02M2001/0058 , Y02B70/1475 , Y02B70/1491
摘要： According to the DC-DC conversion circuit and conversion method, variation of an input voltage is reflected by detecting a voltage at a secondary winding of a transformer, a reference voltage is adjusted by using the detected input voltage signal, a feedback voltage signal is compared with the reference voltage, a duty cycle control signal is adjusted according to a comparison result, and conduction and shutting-down of switching transistors are controlled according to the duty cycle control signal to adjust an output voltage of the DC-DC conversion circuit, so as to enable the output voltage to vary with the input voltage.
摘要翻译： 根据DC-DC转换电路和转换方法，通过检测变压器次级绕组的电压来反映输入电压的变化，通过使用检测的输入电压信号来调整参考电压，比较反馈电压信号 利用参考电压，根据比较结果调整占空比控制信号，根据占空比控制信号控制开关晶体管的导通和关断，以调节DC-DC转换电路的输出电压，因此 以使输出电压随输入电压而变化。
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公开(公告)号：US09787203B2
公开(公告)日：2017-10-10
申请号：US15383614
申请日：2016-12-19
发明人： Zhaozheng Hou , Xiaodong Fan , Jiebin Cheng , Zhihua Liu , Xuezhen Zhang
CPC分类号： H02M3/33546 , H02M1/08 , H02M3/33584 , H02M3/33592 , H02M3/3376 , H02M2001/0009 , H02M2001/0016 , H02M2001/0025 , Y02B70/1475
摘要： A power source management method and a power source are provided. The method includes: comparing a feedforward control signal with a feedback control signal by using a logic control circuit, outputting the signals after the comparison, and performing matching, to obtain control signals of switching transistors of a full-bridge topology circuit; and adjusting the control signals of the switching transistors of the full-bridge topology circuit by using the logic control circuit, so that operating duty cycles of two bridge arms on a primary side match, are symmetric within one switch period of the logic control circuit, or match for a long time, to prevent transformer biasing. The power source management method and the power source can achieve good feedforward performance, suppress input disturbance, and additionally prevent transformer biasing, which ensures that the power source works normally.
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公开(公告)号：US09337741B2
公开(公告)日：2016-05-10
申请号：US14586309
申请日：2014-12-30
发明人： Xiaodong Fan
CPC分类号： H02M3/33507 , H02M3/33523 , H02M3/33592 , H02M2001/0025 , H02M2001/0058 , Y02B70/1475 , Y02B70/1491
摘要： According to the DC-DC conversion circuit and conversion method, variation of an input voltage is reflected by detecting a voltage at a secondary winding of a transformer, a reference voltage is adjusted by using the detected input voltage signal, a feedback voltage signal is compared with the reference voltage, a duty cycle control signal is adjusted according to a comparison result, and conduction and shutting-down of switching transistors are controlled according to the duty cycle control signal to adjust an output voltage of the DC-DC conversion circuit, so as to enable the output voltage to vary with the input voltage.
摘要翻译： 根据DC-DC转换电路和转换方法，通过检测变压器次级绕组的电压来反映输入电压的变化，通过使用检测的输入电压信号来调整参考电压，比较反馈电压信号 利用参考电压，根据比较结果调整占空比控制信号，根据占空比控制信号控制开关晶体管的导通和关断，以调节DC-DC转换电路的输出电压，因此 以使输出电压随输入电压而变化。
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