公开(公告)号：US20110273104A1

公开(公告)日：2011-11-10

申请号：US13089694

申请日：2011-04-19

申请人： Daisuke UCHIMOTO ,  Naoki INOUE ,  Yoju IMAMURA

发明人： Daisuke UCHIMOTO ,  Naoki INOUE ,  Yoju IMAMURA

IPC分类号： H05B37/02

CPC分类号： H02M3/156 ,  G09G3/3406 ,  G09G2320/064 ,  H05B33/0818 ,  H05B33/0824 ,  Y02B20/346

摘要： A control IC controls a switching power supply configured to supply a driving voltage Vout to one terminal of an LED string which is driven in an intermittent manner. A sample-and-hold circuit performs sampling of a detection voltage Vs that corresponds to a driving voltage Vout in the on period, and holds the sampled detection voltage Vs in the off period. In the off period, a pulse modulator generates a pulse signal having a duty ratio adjusted such that a hold detection voltage VsH output from the sample-and-hold circuit matches the detection voltage Vs. A driver drives a switching transistor according to the pulse signal.

摘要翻译： 控制IC控制开关电源，其被配置为将驱动电压Vout提供给以间歇方式驱动的LED串的一个端子。 采样保持电路对导通期间的驱动电压Vout进行检测电压Vs的采样，并将采样检测电压Vs保持在断开期间。 在关闭期间，脉冲调制器产生脉冲信号，该脉冲信号的调整占空比使得从采样保持电路输出的保持检测电压VsH与检测电压Vs匹配。 驱动器根据脉冲信号驱动开关晶体管。

公开(公告)号：US08040701B2

公开(公告)日：2011-10-18

申请号：US12181008

申请日：2008-07-28

申请人： Manabu Oyama ,  Daisuke Uchimoto

发明人： Manabu Oyama ,  Daisuke Uchimoto

IPC分类号： H02M3/07

CPC分类号： H02M3/07

摘要： A first switch group includes switches provided on a path for charging a flying capacitor using an input voltage. A second switch group includes switches provided on a path for charging an output capacitor using charge stored in the flying capacitor. A pulse modulator generates a pulse signal having a duty ratio adjusted so that a feedback voltage corresponding to an output voltage of a charge pump circuit matches a given reference voltage. A driver receives the pulse signal from the pulse modulator, and turns on either one of the first switch group and the second switch group during a period corresponding to a high-time of the pulse signal and turns on the other switch group during a period corresponding to a low-time thereof.

摘要翻译： 第一开关组包括用于使用输入电压对飞跨电容器充电的路径上提供的开关。 第二开关组包括设置在用于对存储在飞行电容器中的电荷充电输出电容器的路径上的开关。 脉冲调制器产生具有调整的占空比的脉冲信号，使得与电荷泵电路的输出电压相对应的反馈电压与给定的参考电压相匹配。 驱动器接收来自脉冲调制器的脉冲信号，并且在与脉冲信号的高电平相对应的时间段期间接通第一开关组和第二开关组中的任一个，并且在相应的时间段期间导通另一个开关组 到一个低时间。

公开(公告)号：US07830131B2

公开(公告)日：2010-11-09

申请号：US11954350

申请日：2007-12-12

申请人： Daisuke Uchimoto ,  Manabu Oyama

发明人： Daisuke Uchimoto ,  Manabu Oyama

IPC分类号： G05F1/00

CPC分类号： H02M3/156 ,  H02M1/36

摘要： A minimum pulse signal generating circuit generates a minimum pulse signal having a predetermined minimum duty ratio, synchronously with a PWM signal. When the duty ratio of the PWM signal is smaller than the minimum duty ratio, a corrected pulse signal generating circuit fixes the logical level of the PWM signal to the level that turns off a switching transistor. A driver circuit drives the switching transistor according to a corrected PWM signal output from the corrected pulse signal generating circuit. In a case in which the level of the PWM signal is fixed by means of the corrected pulse signal generating circuit, a stop signal generating circuit generates a stop signal at a predetermined first level. When the stop signal is at the predetermined first level, at least an oscillator used for pulse modulation is stopped.

摘要翻译： 最小脉冲信号发生电路与PWM信号同步地产生具有预定最小占空比的最小脉冲信号。 当PWM信号的占空比小于最小占空比时，校正脉冲信号发生电路将PWM信号的逻辑电平固定为截止开关晶体管的电平。 驱动电路根据从校正后的脉冲信号发生电路输出的校正后的PWM信号驱动开关晶体管。 在通过校正脉冲信号产生电路固定PWM信号的电平的情况下，停止信号发生电路以预定的第一电平产生停止信号。 当停止信号处于预定的第一电平时，至少停止用于脉冲调制的振荡器。

公开(公告)号：US20090121782A1

公开(公告)日：2009-05-14

申请号：US12270089

申请日：2008-11-13

申请人： Manabu OYAMA ,  Daisuke UCHIMOTO

发明人： Manabu OYAMA ,  Daisuke UCHIMOTO

IPC分类号： G05F1/10

CPC分类号： H02M3/07 ,  H03K3/0315 ,  H03K7/06 ,  H03K2005/00045

摘要： A pulse frequency modulator generates a pulse signal having a fixed duty ratio and a frequency which is adjusted such that a feedback voltage corresponding to the output voltage of a charge pump circuit is coincident with a predetermined first reference voltage. A driver, on receiving the pulse signal, turns on a first or second group of switches during the time periods corresponding to the high time periods of the pulse signal and turns on the other ones of the first and second group of switches during the time periods corresponding to the low time periods of the pulse signal.

摘要翻译： 脉冲频率调制器产生具有固定占空比和调整频率的脉冲信号，使得与电荷泵电路的输出电压相对应的反馈电压与预定的第一参考电压一致。 在接收到脉冲信号的驱动器在与脉冲信号的高时间周期相对应的时间段内接通第一组或第二组开关，并且在该时间段期间打开第一组和第二组开关中的另一组 对应于脉冲信号的低时间周期。

公开(公告)号：US20070211503A1

公开(公告)日：2007-09-13

申请号：US11714462

申请日：2007-03-06

申请人： Manabu Oyama ,  Daisuke Uchimoto

发明人： Manabu Oyama ,  Daisuke Uchimoto

IPC分类号： H02M3/06

CPC分类号： H02M3/07

摘要： A switching power supply apparatus generates a first output voltage with a reversed polarity of an input voltage and a second input voltage of double the input voltage with the reversed polarity, and then outputs them from the first output terminal and the second output terminal. A driver circuit includes a control unit and a first switch to a sixth switch. The driver circuit repeats three charging periods in a time-division manner. The three charging periods are a first charging period during which a flying capacitor is charged with the input voltage, a second charging period in which a low-potential-side terminal of the flying capacitor is connected to a ground terminal and a first output capacitor is charged with a voltage appearing at the other end of the flying capacitor, and a third charging period in which a high-potential-side of the flying capacitor is connected with the first output terminal and a second output capacitor is charged with a voltage appearing at the other end of the flying capacitor.

摘要翻译： 开关电源装置以相反极性的输入电压和输入电压的双倍的第二输入电压生成具有相反极性的第一输出电压，然后从第一输出端子和第二输出端子输出。 驱动器电路包括控制单元和第六开关的第一开关。 驱动器电路以时分方式重复三个充电周期。 三个充电期间是飞行电容器被输入电压充电的第一充电期间，其中将飞跨电容器的低电位侧端子与接地端子连接的第二充电期间和第一输出电容器 对飞跨电容器的另一端出现的电压进行充电;以及第三充电期间，其中，所述飞越电容器的高电位侧与所述第一输出端子连接，并且所述第二输出电容器以 飞电容器的另一端。

公开(公告)号：US20070057707A1

公开(公告)日：2007-03-15

申请号：US11513545

申请日：2006-08-31

申请人： Daisuke Uchimoto ,  Manabu Oyama

发明人： Daisuke Uchimoto ,  Manabu Oyama

IPC分类号： H03K4/06

CPC分类号： H03K4/06

摘要： A first constant-current source supplies a charging current to a second terminal of a first capacitor in which a first terminal is grounded. A first terminal of a second capacitor is grounded, and a first switch is provided between the second terminal of the first capacitor and a second terminal of the second capacitor. A second constant-current source supplies current to the second capacitor, and a second switch is provided on a current path of the second constant-current source. A third constant-current source draws out current from the first capacitor and the second capacitor. A switch controller turns on the first switch and turns off the second switch when an output voltage appearing in the second terminal of the first capacitor reaches a predetermined upper-limit voltage. The switch controller turns off the first switch and turns on the second switch when the output voltage drops to a predetermined lower-limit voltage.

摘要翻译： 第一恒流源将充电电流提供给第一电容器的第二端子，其中第一端子接地。 第二电容器的第一端子接地，并且第一开关设置在第一电容器的第二端子和第二电容器的第二端子之间。 第二恒流源向第二电容器提供电流，并且在第二恒定电流源的电流路径上提供第二开关。 第三恒流源从第一电容器和第二电容器抽出电流。 当第一电容器的第二端子中出现的输出电压达到预定的上限电压时，开关控制器接通第一开关并关闭第二开关。 当输出电压下降到预定的下限电压时，开关控制器关闭第一开关并接通第二开关。