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    • 2. 发明公开
    • Switching mode power supplies and associated methods of control
    • Schaltnetzteil mit Burstbetrieb
    • EP2290796A2
    • 2011-03-02
    • EP10174949.7
    • 2010-09-01
    • Monolithic Power Systems, Inc.
    • Li, EnZhang, Junming
    • H02M3/335
    • H02M3/33515H02M2001/0032Y02B70/16
    • Switching mode power supplies and associated methods of control are disclosed herein. In one embodiment, a method for controlling a switching mode power supply (100) includes determining whether the switching mode power supply is in a burst mode. If the switching mode power supply is in the burst mode, the method includes recording a switching time with and without switching pulses to obtain a current value of an equivalent frequency and generating a peak current limit (V ir ) that decreases as a load becomes lighter based on the equivalent frequency (f eq ), thereby maintaining the equivalent frequency at the current value above an audible range. If the switching mode power supply is not in the burst mode, the method includes continuing to monitor whether the switching mode power supply is in the burst mode.
    • 本文公开了开关模式电源和相关联的控制方法。 在一个实施例中,一种用于控制开关模式电源(100)的方法包括确定开关模式电源是否处于突发模式。 如果开关模式电源处于突发模式,则该方法包括记录具有和没有开关脉冲的开关时间,以获得等效频率的电流值,并产生当负载变轻时减小的峰值电流极限(V ir) 基于等效频率(f eq),从而将当前值的等效频率保持在可听范围之上。 如果开关模式电源不处于突发模式,则该方法包括继续监视开关模式电源是否处于突发模式。
    • 7. 发明公开
    • Switching mode power supply with a multi-mode controller
    • Schaltnetzteil mit Mehrmodus-Steuerung
    • EP2256912A1
    • 2010-12-01
    • EP10250983.3
    • 2010-05-27
    • Monolithic Power Systems, Inc.
    • Li, EnZhang, JunmingRen, Yuancheng
    • H02M3/335
    • H02M3/33523
    • A switching mode power supply with a multi-mode controller is provided. The switching mode power supply may include a transformer having a primary winding and a secondary winding to supply power to a load. A feedback circuit may be included to generate a feedback signal that varies in relation to the load on the secondary winding. The multi-mode controller may include a switching circuit, a frequency control circuit and a current limiting circuit. The switching circuit may be coupled to the primary winding to control current flow through the primary winding. The frequency control circuit may control a switching frequency of the switching circuit based on the feedback signal. The current limiting circuit may limit current flow through the primary winding by causing the switching circuit to suspend current flow through the primary winding when the current reaches a peak current limit that is set based on the feedback signal.
    • 提供了具有多模式控制器的开关模式电源。 开关模式电源可以包括具有初级绕组和次级绕组的变压器,以向负载供电。 可以包括反馈电路以产生相对于次级绕组上的负载而变化的反馈信号。 多模式控制器可以包括开关电路,频率控制电路和限流电路。 开关电路可以耦合到初级绕组以控制通过初级绕组的电流。 频率控制电路可以基于反馈信号来控制开关电路的开关频率。 当电流达到基于反馈信号设定的峰值电流限制时,限流电路可以通过使开关电路暂停通过初级绕组的电流来限制通过初级绕组的电流。
    • 10. 发明公开
    • Dual-mode constant load control circuits and associated methods
    • Dualmodus-Steuerungsschaltungen mit konstanter Ladung undzugehörigeVerfahren
    • EP2256914A2
    • 2010-12-01
    • EP10250991.6
    • 2010-05-27
    • Monolithic Power Systems, Inc.
    • Lu, HuanyuLi, En
    • H02M3/335
    • H02M3/33523
    • Dual-mode AC/DC power converters and associated methods of operation are disclosed herein. In one embodiment, the AC/DC converter includes a primary winding, a switching transistor coupled to the primary winding, the switching transistor configured to carry a drain-source current, and a feedback voltage port configured to carry a feedback voltage. The feedback voltage port is coupled to the switching transistor to switch off the switching transistor when the drain-source current reaches a peak current limit. The peak current limit increases with increasing feedback voltage if and only if the feedback voltage satisfies an ordered relationship with a threshold.
    • 这里公开了双模式AC / DC电力转换器和相关联的操作方法。 在一个实施例中,AC / DC转换器包括初级绕组,耦合到初级绕组的开关晶体管,配置为承载漏源电流的开关晶体管和被配置为承载反馈电压的反馈电压端口。 当漏极 - 源极电流达到峰值电流极限时,反馈电压端口耦合到开关晶体管,以切断开关晶体管。 当且仅当反馈电压满足与阈值的有序关系时,峰值电流限制随着反馈电压的增加而增加。