JP2001119932A5 - - Google Patents

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Publication number
JP2001119932A5
JP2001119932A5 JP1999293340A JP29334099A JP2001119932A5 JP 2001119932 A5 JP2001119932 A5 JP 2001119932A5 JP 1999293340 A JP1999293340 A JP 1999293340A JP 29334099 A JP29334099 A JP 29334099A JP 2001119932 A5 JP2001119932 A5 JP 2001119932A5
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JP
Japan
Prior art keywords
switching element
voltage
output
switching
predetermined value
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JP1999293340A
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Japanese (ja)
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JP2001119932A (en
JP3790392B2 (en
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Priority to JP29334099A priority Critical patent/JP3790392B2/en
Priority claimed from JP29334099A external-priority patent/JP3790392B2/en
Publication of JP2001119932A publication Critical patent/JP2001119932A/en
Publication of JP2001119932A5 publication Critical patent/JP2001119932A5/ja
Application granted granted Critical
Publication of JP3790392B2 publication Critical patent/JP3790392B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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スイッチング素子を介して通電される一次側コイルと複数の出力端子を有する二次側コイルとから構成されたトランスを備え、前記トランスの二次側コイルの出力のうち負荷が最小の電圧を検出し、前記電圧が所定値以下となった場合に前記スイッチング素子の駆動を停止することを特徴とするスイッチング電源の保護回路。  A transformer comprising a primary coil energized via a switching element and a secondary coil having a plurality of output terminals, and detects a voltage with a minimum load from the output of the secondary coil of the transformer. A switching power supply protection circuit that stops driving of the switching element when the voltage falls below a predetermined value. スイッチング素子を介して通電される一次側コイルと複数の出力端子を有する二次側コイルとから構成されたトランス及び前記スイッチング素子と一次側コイルに流れるスイッチング電流を検出する手段を備え、前記トランスの複数の二次側出力のうち負荷が最小の巻線の出力電力が負極性出力である時に、負荷最大の正極性出力電圧と負荷最小の負極性出力電圧間で正側の中点電圧を生成すると共に、その生成された中点電圧を検出するように構成し、負荷最小の負極性出力電圧の絶対値が所定値以下になると共に、前記の生成された中点電圧が所定値以上となった場合に、前記スイッチング素子の駆動を停止することを特徴とするスッチング電源の保護回路。A transformer composed of a primary coil energized via the switching element and a secondary coil having a plurality of output terminals, and a means for detecting a switching current flowing in the switching element and the primary coil. When the output power of the winding with the smallest load among the multiple secondary outputs is a negative output, a positive midpoint voltage is generated between the maximum positive output voltage and the lowest negative output voltage. In addition, it is configured to detect the generated midpoint voltage, and the absolute value of the negative output voltage with the minimum load becomes a predetermined value or less, and the generated midpoint voltage becomes a predetermined value or more. A switching power supply protection circuit that stops driving the switching element when the switching element is driven.
JP29334099A 1999-10-15 1999-10-15 Switching power supply protection circuit Expired - Fee Related JP3790392B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29334099A JP3790392B2 (en) 1999-10-15 1999-10-15 Switching power supply protection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29334099A JP3790392B2 (en) 1999-10-15 1999-10-15 Switching power supply protection circuit

Publications (3)

Publication Number Publication Date
JP2001119932A JP2001119932A (en) 2001-04-27
JP2001119932A5 true JP2001119932A5 (en) 2005-06-09
JP3790392B2 JP3790392B2 (en) 2006-06-28

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ID=17793547

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29334099A Expired - Fee Related JP3790392B2 (en) 1999-10-15 1999-10-15 Switching power supply protection circuit

Country Status (1)

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JP (1) JP3790392B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2884074B1 (en) * 2005-04-01 2007-07-06 Alcatel Converters Sa MULTI-CHANNEL CONVERTER WITH CASCADE CUTTING AND CURRENT LIMITATION
JP5470738B2 (en) * 2008-04-24 2014-04-16 横河電機株式会社 Switching power supply
JP4678429B2 (en) 2008-09-11 2011-04-27 船井電機株式会社 Switching power supply system
JP5799656B2 (en) * 2011-08-18 2015-10-28 株式会社村田製作所 Power transmission system

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