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1. 发明授权

US12062976B2 Power supply circuit and power supply device 有权
公开(公告)号：US12062976B2
公开(公告)日：2024-08-13
申请号：US17703486
申请日：2022-03-24
申请人： FUJI ELECTRIC CO., LTD.
发明人： Yoshinori Kobayashi , Masayuki Yamadaya , Hironobu Shiroyama , Toshimitsu Morimoto
IPC分类号： H02M1/42 , H02M1/08 , H02M3/335 , H04N5/63
CPC分类号： H02M1/4225 , H02M1/08 , H02M3/33571 , H04N5/63
摘要： A power supply circuit of a step-down type, configured to generate an output voltage at a predetermined level from an alternating current (AC) voltage. The power supply circuit includes a rectifier circuit configured to rectify the AC voltage, a first line coupled to the rectifier circuit, a second line on a ground side, a switch coupled between the first line and the second line, and a control circuit configured to control the switch to bring a level of the output voltage to the predetermined level. The power supply circuit is free of an inductor interposed between the first line and the rectifier circuit.

2. 发明授权

US09564821B2 Switching power supply device 有权
标题翻译：开关电源装置
公开(公告)号：US09564821B2
公开(公告)日：2017-02-07
申请号：US14483739
申请日：2014-09-11
申请人： FUJI ELECTRIC CO., LTD.
发明人： Masayuki Yamadaya
IPC分类号： H02M3/335 , H02M3/337 , H03K5/04 , H02M1/00
CPC分类号： H02M3/33569 , H02M3/3376 , H02M2001/0054 , H02M2001/0058 , H03K5/04 , Y02B70/1491
摘要： Included are a switching power supply device main body, and a frequency control circuit that controls the switching frequency of a switching element in accordance with a feedback signal in accordance with the output voltage of the switching power supply device main body. The frequency control circuit is divided into a frequency control region wherein the amount of the feedback signal is greater than a predetermined boundary value and a frequency control region wherein the amount is less, linear frequency control whereby the switching frequency of the switching element is caused to change linearly in accordance with the feedback signal is executed in the frequency control region wherein the feedback amount is less, and linear cycle control whereby the switching cycle of the switching element is caused to change linearly in accordance with the feedback signal is executed in the frequency control region wherein the feedback amount is greater.
摘要翻译：包括开关电源装置主体和根据开关电源装置主体的输出电压根据反馈信号来控制开关元件的开关频率的频率控制电路。频率控制电路被分成频率控制区域，其中反馈信号的量大于预定边界值，以及频率控制区域，其中量少的线性频率控制，使得开关元件的开关频率被引起在反馈量较小的频率控制区域中执行根据反馈信号线性变化的线性循环控制，并且根据反馈信号使开关元件的开关周期线性变化的线性循环控制以频率控制区域，其中反馈量更大。

3. 发明授权

US08619441B2 Switching regulator 有权
标题翻译：开关稳压器
公开(公告)号：US08619441B2
公开(公告)日：2013-12-31
申请号：US13672834
申请日：2012-11-09
申请人： Fuji Electric Co., Ltd.
发明人： Jian Chen , Masayuki Yamadaya
IPC分类号： H02M3/335
CPC分类号： H02M3/33523
摘要： A switching regulator can include a transformer having a primary winding and a secondary winding, a switching circuit including a switching element that is connected in series to the primary winding, the series-connected circuit of the switching element and the primary winding being connected in parallel to a DC power supply and a rectifying circuit connected to the secondary winding. The switching regulator can also include a control circuit to control switching of the switching element to generate DC output voltage from the DC power supply, the DC output voltage being insulated from the DC power supply, an output voltage detecting circuit including a photo-coupler for insulated detection of the DC output voltage, the photo-coupler having a photo-transistor and a load quantity detector for detecting a state in which power consumption in the load connected to the DC output has reached a predetermined value.
摘要翻译：开关调节器可以包括具有初级绕组和次级绕组的变压器，包括与初级绕组串联连接的开关元件的开关电路，开关元件的串联电路和初级绕组并联连接连接到次级绕组的直流电源和整流电路。开关调节器还可以包括用于控制开关元件的开关以从DC电源产生DC输出电压的控制电路，DC输出电压与DC电源绝缘的输出电压检测电路，包括用于直流输出电压的绝缘检测，具有光电晶体管的光耦合器和负载量检测器，用于检测连接到直流输出的负载中的功耗达到预定值的状态。

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