Power supply with improved inrush circuit for limiting inrush cu

Details Power supply with improved inrush circuit for limiting inrush cu Power supply with improved inrush circuit for limiting inrush cu

1997-12-05

1999-03-23

Wong, Peter S.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363143, 323908, 323300, H02M 706, H02M 704, G05F 500

Patent

active

058868925

ABSTRACT:
A new and improved rectifier power supply operates in a low voltage mode of operation and a high voltage mode of operation without user intervention and includes an inrush current limiting device that is in circuit during a predetermined period of time during start up and bypassed during steady state operation in the low voltage mode of operation. In the high voltage mode of operation, when inrush current is reduced relative to the low voltage mode of operation, the inrush limiting device always remains in circuit. As there is no power loss associated with the inrush limiting device in the steady state low voltage mode of operation, the power supply has an improved efficiency and reliability and a reduced cost as it can be rated for continuous operation only in the high voltage mode of operation when the input current is lowest and device dissipation is least.

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Delta Electronics, Inc. Part No. PK220FP-1 DC-DC Convertor & PWM, Protection Switching Power Supply Schematic dated Sep. 30, 1996 with attached E-mail message dated Nov. 11,, 1997 from Flora Cheng to Jennifer Geer regarding the power supply operation.
Delta Electronics, Inc. Switching Power Supply Schematic dated Aug. 30, 1996, Part No. DPS-35DP, DC-323, PK35DP.
Power Supply Schematic dated Oct. 17, 1997.

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