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    • 3. 发明授权
    • Adaptively controlled soft start-up scheme for switching power converters
    • 用于开关电源转换器的自适应控制软启动方案
    • US08582329B2
    • 2013-11-12
    • US13076157
    • 2011-03-30
    • Xiaolin GaoYong LiHien Huu BuiFuqiang Shi
    • Xiaolin GaoYong LiHien Huu BuiFuqiang Shi
    • H02M3/335
    • H02M1/36
    • A switching power converter provides regulated voltage to a load according to a desired regulation voltage. The switching power converter includes a transformer coupled to a switch and a switch controller for generating a control signal to control switching. The switch controller monitors a sensed voltage representing the output voltage of the switching power converter. The switch controller controls switching of the switch to operate the switching power converter in a continuous conduction mode while the sensed output voltage indicates that the output voltage is less than a first threshold voltage. The switch controller controls switching of the switch to operate the switching power converter in a discontinuous conduction mode while the sensed output voltage is above the first threshold voltage.
    • 开关电源转换器根据期望的调节电压向负载提供调节电压。 开关功率转换器包括耦合到开关的变压器和用于产生控制信号以控制开关的开关控制器。 开关控制器监视表示开关功率转换器的输出电压的感测电压。 开关控制器控制开关的切换以在连续导通模式下操作开关功率转换器,同时感测的输出电压指示输出电压小于第一阈值电压。 开关控制器控制开关的开关以在不连续导通模式下操作开关功率转换器,同时感测的输出电压高于第一阈值电压。
    • 7. 发明申请
    • VALLEY-MODE SWITCHING SCHEMES FOR SWITCHING POWER CONVERTERS
    • 用于切换电力转换器的谷模切换方案
    • US20100165672A1
    • 2010-07-01
    • US12642261
    • 2009-12-18
    • Yong LiHien Huu BuiJunjie ZhengJohn William Kesterson
    • Yong LiHien Huu BuiJunjie ZhengJohn William Kesterson
    • H02M3/335
    • H02M3/157H02M3/33507
    • An improved valley-mode switching (VMS) scheme and circuitry for implementing the improved VMS switching scheme in a switch-mode power converter are disclosed. For a given switching cycle, a desired switch turn-on time is determined based on a pulse width modulation, pulse frequency modulation, or other suitable power converter control scheme. Also, one or more times corresponding to local minimums (valleys) are predicted for the voltage across a power switch of the switching power converter. The power switch is turned on at a valley immediately subsequent or otherwise subsequent to the desired switch time determined according to the power converter control scheme. Thus, the improved VMS scheme enables low-voltage switch operation to reduce switching loss and EMI noise without restricting the control scheme of the power converter.
    • 公开了一种改进的谷模切换(VMS)方案和用于在开关模式功率转换器中实现改进的VMS切换方案的电路。 对于给定的开关周期,基于脉冲宽度调制,脉冲频率调制或其它合适的功率转换器控制方案来确定期望的开关导通时间。 此外,对于开关功率转换器的电源开关上的电压,预测对应于局部最小值(谷)的一次或多次。 电源开关在紧随其后或者根据功率转换器控制方案确定的所需开关时间之后的谷处开启。 因此,改进的VMS方案可实现低压开关操作,从而降低开关损耗和EMI噪声,而不会限制功率转换器的控制方案。
    • 9. 发明授权
    • Valley-mode switching schemes for switching power converters
    • 用于开关电源转换器的谷模切换方案
    • US08755203B2
    • 2014-06-17
    • US12642261
    • 2009-12-18
    • Yong LiHien Huu BuiJunjie ZhengJohn William Kesterson
    • Yong LiHien Huu BuiJunjie ZhengJohn William Kesterson
    • H02M3/335
    • H02M3/157H02M3/33507
    • An improved valley-mode switching (VMS) scheme and circuitry for implementing the improved VMS switching scheme in a switch-mode power converter are disclosed. For a given switching cycle, a desired switch turn-on time is determined based on a pulse width modulation, pulse frequency modulation, or other suitable power converter control scheme. Also, one or more times corresponding to local minimums (valleys) are predicted for the voltage across a power switch of the switching power converter. The power switch is turned on at a valley immediately subsequent or otherwise subsequent to the desired switch time determined according to the power converter control scheme. Thus, the improved VMS scheme enables low-voltage switch operation to reduce switching loss and EMI noise without restricting the control scheme of the power converter.
    • 公开了一种改进的谷模切换(VMS)方案和用于在开关模式功率转换器中实现改进的VMS切换方案的电路。 对于给定的开关周期,期望的开关导通时间基于脉宽调制,脉冲频率调制或其它合适的功率转换器控制方案来确定。 此外,对于开关功率转换器的电源开关上的电压,预测对应于局部最小值(谷)的一次或多次。 电源开关在紧随其后或者根据功率转换器控制方案确定的所需开关时间之后的谷处开启。 因此,改进的VMS方案可实现低压开关操作,从而降低开关损耗和EMI噪声,而不会限制功率转换器的控制方案。
    • 10. 发明申请
    • ADAPTIVELY CONTROLLED SOFT START-UP SCHEME FOR SWITCHING POWER CONVERTERS
    • 用于切换电源转换器的自适应控制软启动方案
    • US20120176819A1
    • 2012-07-12
    • US13076157
    • 2011-03-30
    • Xiaolin GaoYong LiHien Huu BuiFuqiang Shi
    • Xiaolin GaoYong LiHien Huu BuiFuqiang Shi
    • H02M3/335
    • H02M1/36
    • A switching power converter provides regulated voltage to a load according to a desired regulation voltage. The switching power converter includes a transformer coupled to a switch and a switch controller for generating a control signal to control switching. The switch controller monitors a sensed voltage representing the output voltage of the switching power converter. The switch controller controls switching of the switch to operate the switching power converter in a continuous conduction mode while the sensed output voltage indicates that the output voltage is less than a first threshold voltage. The switch controller controls switching of the switch to operate the switching power converter in a discontinuous conduction mode while the sensed output voltage is above the first threshold voltage.
    • 开关电源转换器根据期望的调节电压向负载提供调节电压。 开关功率转换器包括耦合到开关的变压器和用于产生控制信号以控制开关的开关控制器。 开关控制器监视表示开关功率转换器的输出电压的感测电压。 开关控制器控制开关的切换以在连续导通模式下操作开关功率转换器,同时感测的输出电压指示输出电压小于第一阈值电压。 开关控制器控制开关的开关以在不连续导通模式下操作开关功率转换器,同时感测的输出电压高于第一阈值电压。