公开(公告)号：US20060193156A1

公开(公告)日：2006-08-31

申请号：US11360484

申请日：2006-02-24

申请人： Kenji Kaishita ,  Hiroki Doi

发明人： Kenji Kaishita ,  Hiroki Doi

IPC分类号： H02M7/00

CPC分类号： H02M3/07

摘要： A charge pump DC/DC converter circuit of the present invention includes: a monitor circuit that detects a potential difference between terminals of a semiconductor switch that turns on during a first period, so as to output a determining signal corresponding to the potential difference; and each of drive circuits that outputs a drive signal to a semiconductor switch that turns on during a first period, in response to the determining signal. The drive signal increases the on-resistance of the semiconductor switch in proportion to the detected potential difference.

摘要翻译： 本发明的电荷泵DC / DC转换器电路包括：监视电路，其检测在第一时段期间导通的半导体开关的端子之间的电位差，以输出对应于该电位差的确定信号; 以及每个驱动电路，其响应于所述确定信号，将驱动信号输出到在第一时段期间导通的半导体开关。 驱动信号与检测到的电位差成比例地增加半导体开关的导通电阻。

公开(公告)号：US06803807B2

公开(公告)日：2004-10-12

申请号：US10358189

申请日：2003-02-05

申请人： Toshiya Fujiyama ,  Masanori Inamori ,  Hiroki Doi

发明人： Toshiya Fujiyama ,  Masanori Inamori ,  Hiroki Doi

IPC分类号： G05F110

CPC分类号： H02M3/07 ,  H02M2003/071

摘要： In a negative voltage output charge pump circuit, first a capacitor C1 is charged with a positive voltage Vin relative to a reference voltage, and then the high-potential terminal A of the capacitor C1 is made to conduct to the reference voltage and simultaneously the low-potential terminal B of the capacitor C1 is made to conduct to an output terminal OUT so that the voltage with which the capacitor C1 is charged is output as a negative voltage −Vin. Here, at least one of the switching device DP1 that is kept on while the capacitor C1 is being charged so as to apply the reference voltage to the point B and the switching device DP2 that is kept on while the negative voltage is being output so as to make the point B conduct to the output terminal OUT is a depletion-type transistor. This configuration makes it possible to realize a negative voltage output charge pump circuit that is free from malfunctioning caused by a parasitic device, that operates with low loss, and that can be produced at low costs.

摘要翻译： 在负电压输出电荷泵电路中，首先，电容器C1相对于参考电压被充有正电压Vin，然后使电容器C1的高电位端子A导通到参考电压，同时低电平 使电容器C1的电位端子B导通到输出端子OUT，使得电容器C1被充电的电压被输出为负电压-Vin。 这里，开关装置DP1中的至少一个在电容器C1正在被充电的同时保持接通，以便在输出负电压的同时将参考电压施加到点B和保持开关的开关装置DP2，从而 使点B导通到输出端子OUT是耗尽型晶体管。 通过这样的结构，能够实现低损耗运转的寄生装置不产生故障的负电压输出电荷泵电路，能够以低成本生产。