INRUSH CURRENT LIMITING CIRCUIT AND POWER SUPPLY DEVICE USING THE SAME

摘要

An inrush current limiting circuit ( 12 ) includes a transistor (Q), a switch element (M), and a short-circuit protection circuit ( 121 ). An emitter of the transistor is as an input of the inrush current limiting circuit. An input of the switch element is connected to a collector of the transistor. A second output of the switch element is as an output of the inrush current limiting circuit. A first terminal of the short-circuit protection circuit is connected to a first output of the switch element. A second terminal of the short-circuit protection circuit is connected to a base of the transistor. A third terminal of the short-circuit protection circuit is connected to the second output of the switch element.