VALLEY-MODE SWITCHING SCHEMES FOR SWITCHING POWER CONVERTERS
    3.
    发明申请
    VALLEY-MODE SWITCHING SCHEMES FOR SWITCHING POWER CONVERTERS 有权
    用于切换电力转换器的谷模切换方案

    公开(公告)号:US20100165672A1

    公开(公告)日:2010-07-01

    申请号:US12642261

    申请日:2009-12-18

    IPC分类号: H02M3/335

    CPC分类号: H02M3/157 H02M3/33507

    摘要: 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.

    摘要翻译: 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。

    Valley-mode switching schemes for switching power converters
    4.
    发明授权
    Valley-mode switching schemes for switching power converters 有权
    用于开关电源转换器的谷模切换方案

    公开(公告)号:US08755203B2

    公开(公告)日:2014-06-17

    申请号:US12642261

    申请日:2009-12-18

    IPC分类号: H02M3/335

    CPC分类号: H02M3/157 H02M3/33507

    摘要: 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.

    摘要翻译: 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。

    CONTROLLER FOR SWITCHING POWER CONVERTER DRIVING BJT BASED ON PRIMARY SIDE ADAPTIVE DIGITAL CONTROL
    7.
    发明申请
    CONTROLLER FOR SWITCHING POWER CONVERTER DRIVING BJT BASED ON PRIMARY SIDE ADAPTIVE DIGITAL CONTROL 有权
    基于主端自适应数字控制切换功率转换器驱动的控制器

    公开(公告)号:US20100157636A1

    公开(公告)日:2010-06-24

    申请号:US12639399

    申请日:2009-12-16

    IPC分类号: H02M7/217

    CPC分类号: H02M3/33515 H02M2001/0009

    摘要: A controller of an AC/DC flyback switching power supply uses adaptive digital control approaches to control the switching operation of a BJT power switch based on primary-side feedback to regulate the secondary-side constant output voltage and output current, without using the input line voltage. Switching-cycle by switching-cycle peak current control and limit are achieved based on the sensed primary-side current rather than the input line voltage in both constant-voltage and constant-current modes, operating in PWM, PFM and/or combinations of a plurality of PWM and PFM modes. The controller IC does not need a separate pin and ADC circuitry for sensing the input line voltage. The controller IC directly drives the BJT base, and dynamically adjusts the BJT base current amplitude cycle by cycle based on load change

    摘要翻译: AC / DC反激式开关电源的控制器采用自适应数字控制方式,根据初级侧反馈来控制BJT功率开关的开关动作,调节二次侧恒定输出电压和输出电流,不用输入线 电压。 基于感测到的初级侧电流而不是在恒定电压和恒定电流模式中的输入线电压来实现开关周期峰值电流控制和限制的开关周期,其以PWM,PFM和/或 多个PWM和PFM模式。 控制器IC不需要单独的引脚和ADC电路来感测输入线电压。 控制器IC直接驱动BJT基座,并根据负载变化动态调整BJT基极电流幅度周期

    Controller for switching power converter driving BJT based on primary side adaptive digital control
    8.
    发明授权
    Controller for switching power converter driving BJT based on primary side adaptive digital control 有权
    基于初级侧自适应数字控制的开关电源转换器驱动BJT的控制器

    公开(公告)号:US08289732B2

    公开(公告)日:2012-10-16

    申请号:US12639399

    申请日:2009-12-16

    IPC分类号: H02M3/335

    CPC分类号: H02M3/33515 H02M2001/0009

    摘要: A controller of an AC/DC flyback switching power supply uses adaptive digital control approaches to control the switching operation of a BJT power switch based on primary-side feedback to regulate the secondary-side constant output voltage and output current, without using the input line voltage. Switching-cycle by switching-cycle peak current control and limit are achieved based on the sensed primary-side current rather than the input line voltage in both constant-voltage and constant-current modes, operating in PWM, PFM and/or combinations of a plurality of PWM and PFM modes. The controller IC does not need a separate pin and ADC circuitry for sensing the input line voltage. The controller IC directly drives the BJT base, and dynamically adjusts the BJT base current amplitude cycle by cycle based on load change.

    摘要翻译: AC / DC反激式开关电源的控制器采用自适应数字控制方式,根据初级侧反馈来控制BJT功率开关的开关动作,调节二次侧恒定输出电压和输出电流,不用输入线 电压。 基于感测到的初级侧电流而不是在恒定电压和恒定电流模式中的输入线电压来实现开关周期峰值电流控制和限制的开关周期,其以PWM,PFM和/或 多个PWM和PFM模式。 控制器IC不需要单独的引脚和ADC电路来感测输入线电压。 控制器IC直接驱动BJT基座,并根据负载变化动态调整BJT基极电流幅度周期。

    Hybrid adaptive power factor correction schemes for switching power converters
    10.
    发明授权
    Hybrid adaptive power factor correction schemes for switching power converters 有权
    用于开关电源转换器的混合自适应功率因数校正方案

    公开(公告)号:US08787039B2

    公开(公告)日:2014-07-22

    申请号:US13552567

    申请日:2012-07-18

    IPC分类号: H02M3/335

    摘要: A method of a controller of a switching power converter that provides a configurable power factor control method for the switching power converter. The controller combines power regulation control methods of constant on-time control and constant power control to adjust the power factor of the switching power converter. The controller switches between constant on-time control and constant power control based on an input voltage of the power converter.

    摘要翻译: 一种提供用于开关功率转换器的可配置功率因数控制方法的开关电源转换器的控制器的方法。 该控制器结合了恒定导通时间控制和恒功率控制的功率调节控制方式,以调整开关电源转换器的功率因数。 控制器根据功率转换器的输入电压在恒定导通时间控制和恒定功率控制之间切换。