POWER TRANSFORMING DEVICE WITH A POWER-SAVING CIRCUIT LOOP

摘要

A power transforming device with a power-saving circuit loop is connected between a voltage source and an electric/electronic appliance, and has a micro-controller unit (MCU), a mode-switching circuit, a conversion circuit, and an output circuit. The mode-switching circuit has a switching element. The conversion circuit has an isolating element and a winding. The isolating element and one end of the winding are connected to the switching element. The output circuit has a switching element having one contact connected with the winding and another contact connected with the switching element of the mode-switching circuit. The MCU controls the isolating element and the switching elements to boost or buck down an input voltage according to the value of the input voltage, and directly outputs the input voltage without additionally consuming energy when voltage transforming operation is not required.

主权项

1. A power transforming device with a power-saving circuit loop, comprising:
a mode-switching circuit having a voltage input terminal and a switching element, wherein the switching element has a first contact and a second contact; a conversion circuit having:
an auto-transformer having at least one tap, one of which is connected to the second contact of the switching element; andan isolating element having:
a common terminal connected to the first contact of the switching element;a normally closed terminal; anda normally open terminal connected to one end of the auto-transformer; an output circuit having:
a switching element having:
a third contact connected with one of the at least one tap; anda fourth contact connected with the common terminal of the isolating element; anda voltage output terminal; and a micro-controller unit (MCU) connected to the switching element of the mode-switching circuit, the isolating element of the conversion circuit, the switching element of the output circuit, and the voltage input terminal of the mode-switching circuit, and having at least one voltage threshold.