INTEGRATED SWITCHING POWER SUPPLY DEVICE AND ELECTRIC APPARATUS

摘要

An integrated switching power supply device includes a series-connected body, a driving control element, and external terminals. In the series-connected body, a switching element, a constant current element, and a diode are connected in series. The driving control element controls to drive the constant current element. The external terminals include first to seventh external terminals. The first and second external terminals are connected to main terminals of elements of the series-connected body. The third external terminal is connected to a connection point of main terminals of the switching element or the constant current element and a main terminal of the diode. The fourth external terminal is connected to a control terminal of the switching element. The fifth external terminal supplies electric power to the driving control element. The sixth external terminal inputs reference potential. The seventh external terminal inputs a signal to the driving control element.

主权项

1. An integrated switching power supply device comprising:
a series-connected body in which a switching element, a constant current element, and a diode are connected in series; a driving control element connected to a control terminal of the constant current element and configured to control to drive the constant current element; and a plurality of external terminals including a first external terminal connected to a main terminal of an element located on one end side of the series-connected body, a second external terminal connected to a main terminal of an element located on one other end side of the series-connected body, a third external terminal connected to a connection point of a main terminal of the switching element or the constant current element and a main terminal of the diode, a fourth external terminal connected to a control terminal of the switching element, a fifth external terminal connected to the driving control element and connected to a power supply source for the driving control element, a sixth external terminal connected to the driving control element and configured to input reference potential to the driving control element, and a seventh external terminal connected to the driving control element and configured to input a signal to the driving control element from an outside.