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Electronic contactless load switching device esp. for optical proximity switch - uses DC=DC converter controlled by output of switching amplifier and coupled to control electrode of power MOSFET
Electronic contactless load switching device esp. for optical proximity switch - uses DC=DC converter controlled by output of switching amplifier and coupled to control electrode of power MOSFET
The switching device is coupled via an external lead to one terminal of a voltage source and via a second lead to the switched load which is coupled on the other side to the second voltage source terminal. It uses a proximity indicator (1) employing an oscillator, coupled via a switching amplifier (2) to a controlled electronic switch (3), e.g. a MOSFET. A DC/DC converter (5) is coupled at its input (7) to a control output (8) of the switching amplifier (2), its output (10) coupled to the control electrode of the switch (3). Pref. the DC/DC converter (5) uses a Clapp oscillator. ADVANTAGE - Reduced voltage drop in conductive state of switching device.
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机译:开关装置通过外部引线耦合至电压源的一个端子,并且通过第二引线耦合至开关负载,该开关负载的另一侧耦合至第二电压源端子。它使用带有振荡器的接近指示器(1),该指示器通过开关放大器(2)耦合到受控的电子开关(3),例如开关。 MOSFET。 DC / DC转换器(5)在其输入(7)处耦合到开关放大器(2)的控制输出(8),其输出(10)耦合到开关(3)的控制电极。首选DC / DC转换器(5)使用Clapp振荡器。优点-降低开关设备导通状态下的电压降。
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