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11. 发明申请

US20130215649A1 PRIMARY-SIDE REGULATED MODULATION CONTROLLER WITH IMPROVED TRANSIENT RESPONSE AND AUDILE NOISE 有权
标题翻译：具有改进的瞬态响应和噪声噪声的主侧调节调制控制器
公开(公告)号：US20130215649A1
公开(公告)日：2013-08-22
申请号：US13398832
申请日：2012-02-16
申请人： Yuquan HUANG , Matthew Man Ho Ku
发明人： Yuquan HUANG , Matthew Man Ho Ku
IPC分类号： H02M3/335
CPC分类号： H02M1/44 , H02M3/33523 , H02M2001/0019 , H02M2003/1566
摘要： A switching mode power supply, and a primary-side controlled PFM converter using the primary-side regulated PFM controller are discussed. In present embodiment, the primary side cycle by cycle switch peak current is no longer a constant. The time detector is added to monitor the waveform of primary-side sample voltage and then generate the duty cycle. The transfer function should be selected to satisfy a specific relationship of switching frequency and switch peak current against with output loading current. The new design shows higher switching frequency but lower value of switch peak current at light load condition. This resolves the audible noise and poor transient response issue from the prior art PFM controller.
摘要翻译：讨论了开关模式电源和使用初级侧调节PFM控制器的初级侧控制PFM转换器。在本实施例中，通过循环开关峰值电流的初级侧循环不再是常数。添加时间检测器来监测初级侧采样电压的波形，然后生成占空比。应选择传递函数以满足开关频率和开关峰值电流与输出负载电流的具体关系。新设计显示较高的开关频率，但在轻负载条件下开关峰值电流值较低。这解决了现有技术的PFM控制器的可听噪声和差的瞬态响应问题。

12. 发明申请

US20100275052A1 LOAD ADAPTIVE EMI REDUCTION SCHEME FOR SWITCHING MODE POWER SUPPLY 有权
标题翻译：用于切换模式电源的负载自适应EMI减少方案
公开(公告)号：US20100275052A1
公开(公告)日：2010-10-28
申请号：US12429727
申请日：2009-04-24
申请人： Matthew Man Ho Ku
发明人： Matthew Man Ho Ku
IPC分类号： G06F1/04
CPC分类号： G06F1/08 , H02M1/44 , H02M3/33507 , H03K3/84 , H03K7/08 , H04R3/00
摘要： The present invention relates to a frequency jittering device and method, and a switching power supply employing such frequency jittering device. Said method comprises: S1 generating a variable logic number; S2 generating a delay signal; S3 generating a PWM control signal according to the variable logic number and the delay signal; S4 generating an output signal according to the PWM control signal; and S5 generating a clock signal with variable frequency according to the output signal; wherein, the clock signal is fed back to update the variable logic number, and a jittering clock signal modified in each clock cycle is produced. The benefit of the present invention is not only can apply small low cost EMI filter but also can keep the noise floor level low enough at light load condition.
摘要翻译：本发明涉及一种频率抖动装置和方法，以及采用这种频率抖动装置的开关电源。所述方法包括：S1产生可变逻辑数; S2产生延迟信号; S3根据可变逻辑号和延迟信号产生PWM控制信号; S4根据PWM控制信号产生输出信号; S5根据输出信号产生具有可变频率的时钟信号; 其中，时钟信号被反馈以更新可变逻辑号，并且产生在每个时钟周期中修改的抖动时钟信号。本发明的优点不仅可以应用小型低成本EMI滤波器，而且还可以在轻负载条件下将噪声基底电平保持在足够低的范围。

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