公开(公告)号：US20120235623A1

公开(公告)日：2012-09-20

申请号：US13232159

申请日：2011-09-14

申请人： Tsutomu ISHINO ,  Tadayuki Sakamoto

发明人： Tsutomu ISHINO ,  Tadayuki Sakamoto

IPC分类号： H02J7/00

CPC分类号： H01M10/44 ,  H01M10/465 ,  H02J7/045 ,  H02J7/35 ,  Y02E10/566 ,  Y10T307/625 ,  Y10T307/707 ,  Y10T307/826

摘要： A charging circuit receives electric power from a solar battery, and charges a secondary battery. A charging current detection unit generates a detection signal that corresponds to a charging current supplied from a DC/DC converter to the secondary battery. A control circuit generates a reference voltage that corresponds to the detection signal. A driving unit generates a pulse signal having a duty ratio that is adjusted such that the voltage output from the solar battery matches the reference voltage, and performs switching of a switching transistor according to the pulse signal. A control circuit adjusts the reference voltage such that the reference voltage becomes greater.

摘要翻译： 充电电路从太阳能电池接收电力，并对二次电池充电。 充电电流检测单元产生与从DC / DC转换器提供给二次电池的充电电流对应的检测信号。 控制电路产生对应于检测信号的参考电压。 驱动单元产生具有调节使得从太阳能电池输出的电压与参考电压相匹配的占空比的脉冲信号，并且根据脉冲信号执行开关晶体管的切换。 控制电路调整参考电压，使得参考电压变大。

公开(公告)号：US20080284402A1

公开(公告)日：2008-11-20

申请号：US12133274

申请日：2008-06-04

申请人： Tsutomu ISHINO

发明人： Tsutomu ISHINO

IPC分类号： G05F1/00

CPC分类号： H02M3/1584 ,  H02M2001/0045

摘要： A power supply unit comprises a series regulator and a switching DC-DC converter controlled by a PWM signal and connected in parallel with the series regulator, which are switchably enabled by a mode instruction signal depending on the magnitude of a load current. In switching the series regulator and the DC-DC converter, they are simultaneously enabled for a predetermined overlapping time. Further, in changing the operating condition of the DC-DC converter, the width of the PWM signal is shortened to extend the dead time of the DC-DC converter by a predetermined period, thereby suppressing free oscillations and accompanying overshoots that could take place in the power supply unit during switching.

摘要翻译： 电源单元包括串联调节器和由PWM信号控制并与串联调节器并联连接的开关DC-DC转换器，其可根据负载电流的大小由模式指令信号切换使能。 在串联调节器和DC-DC转换器的切换中，它们同时使能预定的重叠时间。 此外，在改变DC-DC转换器的工作状态时，PWM信号的宽度被缩短以将DC-DC转换器的死区时间延长预定的周期，从而抑制可能发生的自由振荡和伴随的过冲 电源单元在切换期间。

公开(公告)号：US20130043851A1

公开(公告)日：2013-02-21

申请号：US13586289

申请日：2012-08-15

申请人： Tsutomu ISHINO

发明人： Tsutomu ISHINO

IPC分类号： G05F1/10

CPC分类号： H02M3/156 ,  H02M2001/0035 ,  Y02B70/16

摘要： The present invention improves the efficiency of a switching power supply in a light load. A control circuit is configured to repeat a driving duration enabling the switching element to be switched and a stop duration stopping the switching in a light load state. A pulse signal generating portion generates a driving pulse signal, in which the driving pulse signal at least includes a pulse in the driving duration, and the lighter a load is, the less the number of pulses in the driving duration is. A first driver drives a first switching transistor according to the at least one pulse in the driving pulse signal other than predetermined K pulses (K is a natural number). The K pulses are in the driving pulse signal when the number of the pulses is reduced to K.

摘要翻译： 本发明提供了轻负载时开关电源的效率。 控制电路被配置为重复启用开关元件的驱动持续时间，并且在轻负载状态下停止切换的停止持续时间。 脉冲信号产生部分产生驱动脉冲信号，其中驱动脉冲信号至少包括驱动持续时间中的脉冲，负载越轻，驱动持续时间中的脉冲数越少。 第一驱动器根据除了预定的K个脉冲之外的驱动脉冲信号中的至少一个脉冲驱动第一开关晶体管（K是自然数）。 当脉冲数减少到K时，K脉冲处于驱动脉冲信号中。

公开(公告)号：US20120126768A1

公开(公告)日：2012-05-24

申请号：US13298695

申请日：2011-11-17

申请人： Tsutomu ISHINO

发明人： Tsutomu ISHINO

IPC分类号： G05F1/10

CPC分类号： H02M3/156 ,  H02M2001/0035 ,  Y02B70/16

摘要： An error amplifier generates an error signal VERR that corresponds to the difference between a feedback signal VFB and a predetermined reference voltage VREF. A first oscillator generates a first cyclic signal VOSC1 having a sloping segment and a first frequency. A second oscillator generates a second cyclic signal VOSC2 having a sloping segment and a second frequency that is lower than the first frequency. A first pulse modulator generates a first pulse signal having a pulse width that corresponds to the error signal VERR, and clamps its pulse width such that it does not become smaller than a first minimum pulse width. A second pulse modulator generates a second pulse signal having a pulse width that corresponds to the error signal VERR. A synthesizing unit combines the first pulse signal and the second pulse signal so as to generate a driving pulse signal.

摘要翻译： 误差放大器产生对应于反馈信号VFB和预定参考电压VREF之间的差的误差信号VERR。 第一振荡器产生具有倾斜段和第一频率的第一循环信号VOSC1。 第二振荡器产生具有低于第一频率的倾斜段和第二频率的第二循环信号VOSC2。 第一脉冲调制器产生具有对应于误差信号VERR的脉冲宽度的第一脉冲信号，并且钳位其脉冲宽度，使得其不变得小于第一最小脉冲宽度。 第二脉冲调制器产生具有对应于误差信号VERR的脉冲宽度的第二脉冲信号。 合成单元组合第一脉冲信号和第二脉冲信号以产生驱动脉冲信号。

公开(公告)号：US20090273329A1

公开(公告)日：2009-11-05

申请号：US12502292

申请日：2009-07-14

申请人： Tsutomu ISHINO

发明人： Tsutomu ISHINO

IPC分类号： G05F1/10

CPC分类号： H02M3/1588 ,  Y02B70/1466

摘要： A pulse signal generating circuit generates a pulse signal having a duty ratio controlled such that the output voltage approaches a reference voltage. A driver circuit generates first and second gate voltages, which are to be respectively applied to the gates of a switching transistor and a synchronous rectifier transistor, based upon the pulse signal. A threshold voltage generating unit generates a threshold voltage which is synchronous with the second gate voltage, and which is in the high-level state during a period when the synchronous rectifier transistor is to be turned off and in the low-level state during a period when the synchronous rectifier transistor is to be turned on. A light-load detection comparator compares a switching voltage with the threshold voltage, and outputs a light-load detection signal.

摘要翻译： 脉冲信号发生电路产生占空比被控制使得输出电压接近参考电压的脉冲信号。 驱动电路基于脉冲信号产生分别施加到开关晶体管和同步整流晶体管的栅极的第一和第二栅极电压。 阈值电压生成单元生成与第二栅极电压同步的阈值电压，并且在同步整流器晶体管要截止的期间处于高电平状态，并且在周期期间处于低电平状态 当同步整流晶体管要接通时。 轻负载检测比较器将开关电压与阈值电压进行比较，并输出轻负载检测信号。