公开(公告)号：JP2000341934A

公开(公告)日：2000-12-08

申请号：JP2000144365

申请日：2000-05-17

Applicant: ST MICROELECTRONICS INC

Inventor： WENZEL EDWARD P

IPC: H02M3/28 ,  H02M1/10 ,  H02M3/335

Abstract: PROBLEM TO BE SOLVED: To obtain an AD and DC input power supply in which separation and operation can be carried out from both full range input AC voltage and low DC input voltage by providing an AC power supply circuit with an AC input, a rectifier circuit, a separation output transformer, and the like, and providing a DC power supply circuit with a DC input terminal connectable selectively among low voltage winding sections. SOLUTION: An AC power supply circuit 10 is provided with an AC input connector 12, an input fuse 14, an output transformer T1, and the like. A rectifier circuit 30 is also provided and connected through the fuse 14 with the AC input connector 12. The low voltage winding section 36 of the transformer T1 is connected with a DC voltage input lower than the range of a DC voltage produced by rectifying the AC input voltage. A DC power supply circuit has an input terminal formed as a connector 44 and connected with a fuse 48. Furthermore, a diode 50 is connected with the connector 44 and a switch 42 is connected with the diode 50. According to the circuitry, the DC input terminal can be connected selectively with the first primary winding terminal 18a when a nominal DC voltage is inputted to the connector 44.

公开(公告)号：DE60012084D1

公开(公告)日：2004-08-19

申请号：DE60012084

申请日：2000-05-11

Applicant: ST MICROELECTRONICS INC

Inventor： WENZEL EDWARD P

IPC: H02M3/28 ,  H02M1/10 ,  H02M3/335 ,  H02M7/00

Abstract: A power supply includes an AC supply circuit and an AC input having a rectifier. An isolation output transformer has first and second primary winding terminals and a low voltage winding section for connecting to a DC voltage input that is lower than the range of the DC voltage from the rectifier. The rectifier is connected to the first primary winding of the transformer. A transistor is connected to the second primary winding of the transformer. The DC supply circuit includes a DC input selectably connectable between the first primary winding when the input to the DC input is a nominal DC voltage within the range of the DC bulk voltage and the low voltage winding section when the input to the DC input is lower than the range of the DC bulk voltage.