Power supply apparatus and method

A power supply device and current technology, applied in output power conversion devices, electrical components, conversion equipment without intermediate conversion to AC, etc., can solve problems such as increased loss, and achieve the effect of safety protection

Inactive Publication Date: 2011-02-02
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problem with this method is that electrical stress is already applied to the semiconductor during the period until overheating
Also, the method may not stop operation as losses increase at levels that are not sensed as overheating

Method used

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  • Power supply apparatus and method
  • Power supply apparatus and method
  • Power supply apparatus and method

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Embodiment Construction

[0054] It should be noted that the embodiments described below are all preferred specific examples of the present invention. Although various technically preferred limitations are given, as long as there is no specific description to limit the embodiments of the present invention in the following description, the present invention The scope of the embodiments is not limited to these exemplary embodiments.

[0055] In order to facilitate understanding of the embodiments of the present invention, reference is made to figure 1 A description is given of an example of a power supply device having an existing continuous current mode PFC control circuit to which the embodiments of the present invention can be applied. The continuous current mode is used to control switching elements on / off with drive pulses. Discontinuous current mode (called critical mode) is used to detect zero current using the secondary winding provided in the choke coil, and switch elements on / off at zero curre...

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Abstract

A power supply apparatus and method are provided. A conversion component outputs a first current having a predetermined phase region, an output component outputs a load voltage, a sense component senses a second current value, and a switch element allows current to flow in a first state and impedes current in a second state. The switch element changes between states based on a drive signal forcing the switch into the second state when the first current is in the predetermined phase region and the second current value exceeds a threshold indicating an overcurrent condition. A region determination circuit determines whether the first current is in the predetermined phase region and produces a phase region signal. An overcurrent detection circuit senses the second current value, determines whether it exceeds an overcurrent condition threshold, and produces an overcurrent signal. A protection circuit causes the drive circuit to switch the drive signal.

Description

[0001] References to related applications [0002] The present application claims priority from Japanese Priority Patent Application JP 2009-170785 filed with the Japan Patent Office on Jul. 22, 2009, the entire contents of which are incorporated herein by reference. technical field [0003] The present invention relates to a power supply device that generates a stable DC voltage by rectifying an alternating current, and more particularly, to a power supply device having a PFC control circuit. Background technique [0004] A power supply device with a PFC (Power Factor Correction) control IC (Integrated Circuit) can suppress the occurrence of harmonics by improving the power factor. As such a power supply device, there is a power supply device described in Japanese Unexamined Patent Application Publication No. 11-164548. [0005] The power supply device described in Japanese Unexamined Patent Application Publication No. 11-164548 is designed to prevent a rapid rise in input...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/32H02M3/10H02M7/12
CPCH02M3/156H02M1/32
Inventor 赤间博
Owner SONY CORP
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