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1. 发明授权

US07084611B2 DC/DC converter 有权
标题翻译： DC / DC转换器
公开(公告)号：US07084611B2
公开(公告)日：2006-08-01
申请号：US10692448
申请日：2003-10-23
申请人： Joerg Kirchner , Thomas Keller , Christian Schimpfle
发明人： Joerg Kirchner , Thomas Keller , Christian Schimpfle
IPC分类号： G05F1/613
CPC分类号： H02M3/1582 , H02M2001/0045
摘要： The invention relates to a DC/DC converter including an input to which an input voltage Vin is applied, a inductance L whose one terminal is connected to the input, a first controllable switch N1 via which the other terminal of the inductance is connectable to a reference potential Vss, a second controllable switch P1 via which the other terminal of the inductance is connectable to the output of the converter, and a regulator circuit 1 configured so that it is able to control the two switches in regulating the output voltage of the DC/DC converter to a predetermined wanted value. The second controllable switch is a PMOS-FET. The regulator circuit is configured so that when the input voltage is higher than the desired value of the output voltage, the gate of the PMOS-FET is permanently connected to a voltage which is larger than the difference between the input voltage and the threshold voltage of the PMOS-FET, it connecting the back gate of the PMOS-FET permanently to a voltage which is larger than the expression input voltage plus threshold voltage of the PMOS-FET minus the diode voltage of a pn junction of the PMOS-FET and timing the first controllable switch with a specific duty cycle so that the output voltage attains the wanted value. The converter in accordance with the invention now permits achieving both an increase and decrease in the input voltage. It can be put to use preferably in conjunction with battery-powered devices for which a wanted voltage is specified.
摘要翻译：本发明涉及一种DC / DC转换器，其包括施加输入电压Vin的输入端，一端连接到输入端的电感L，电感的另一端经由该第一可控开关N 1可连接到参考电位Vss，电感的另一个端子可连接到转换器的输出端的第二可控开关P1，以及调节器电路1，其被配置成能够控制两个开关调节输出电压 DC / DC转换器达到预定的有用值。第二可控开关是PMOS-FET。调节器电路被配置为使得当输入电压高于输出电压的期望值时，PMOS-FET的栅极永久地连接到大于输入电压和阈值电压之间的差的电压 PMOS-FET将PMOS-FET的背栅极永久地连接到比PMOS-FET的表达式输入电压+阈值电压减去PMOS-FET的pn结的二极管电压和定时具有特定占空比的第一可控开关，使得输出电压达到所需值。根据本发明的转换器现在允许实现输入电压的增加和减小。优选地可以与指定了所需电压的电池供电的装置一起使用。

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