JP2016163438A - スイッチング電源装置 - Google Patents
スイッチング電源装置 Download PDFInfo
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- JP2016163438A JP2016163438A JP2015040757A JP2015040757A JP2016163438A JP 2016163438 A JP2016163438 A JP 2016163438A JP 2015040757 A JP2015040757 A JP 2015040757A JP 2015040757 A JP2015040757 A JP 2015040757A JP 2016163438 A JP2016163438 A JP 2016163438A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0006—Arrangements for supplying an adequate voltage to the control circuit of converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/327—Means for protecting converters other than automatic disconnection against abnormal temperatures
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
Abstract
【解決手段】2次側同期整流IC80が、過熱,過電圧,過負荷等の異常を検出すると、2次側同期整流IC80の異常時電流出力端子より電流が出力される。出力された電流88が抵抗R2に流れることにより、出力電圧の検出点62の電圧Vdetを持ち上げて、シャントレギュレータ60のカソードに流れる電流を増加させる。それによりフォトカプラのフォトダイオード70に流れる電流も増加し、1次側のフォトトランジスタ50に接続されるスイッチング制御IC40のFB端子電圧が減少する。それに応じて1次側のスイッチング制御IC40は、出力電力を絞るように動作することで2次側の出力電圧VOUTを減少させる、もしくはスイッチング電源装置の動作を停止させる。
【選択図】図1
Description
図6は、従来の2次側同期整流方式を用いたスイッチング電源装置の構成を示す代表例であり、AC電圧をダイオードブリッジ110にて整流した電圧をスイッチング素子としてのMOSFET(Metal Oxide Semiconductor Field Effect Transistor)とトランスとを用いて所望のDC電圧を得るAC−DCコンバータについて、下記特許文献1の図1を参考に簡略化したものである。
このとき、制御IC130では、IS端子の電圧からMOSFET120へ流れる電流を検出し、また2次側からのフィードバック電圧をFB端子で検出し、両者を比較することでMOSFET120をスイッチングする際のオン幅を決めるようにしている。
本発明の基本原理について最初に説明する。2次側同期整流ICは、2次側に置かれた制御ICとなるため、本来的に精度良く出力電圧の状態を把握することができるはずのものである。これに対し、従来構成(特許文献1の図1参照)では、トランスの補助巻線の電圧を1次側のスイッチング制御ICで検出することにより出力電圧の検出を行うため、数%〜数10%の精度しか期待できなかった。
20 トランス
30 MOSFET
40 制御IC
50 フォトトランジスタ
60 シャントレギュレータ
62 検出端子
64 オペアンプ
66 出力トランジスタ
70 フォトダイオード
80 制御IC
84 オア回路
86 電流出力回路
88 異常時に出力される電流
90 MOSFET
94 寄生ダイオード
Claims (6)
- 入力電圧を、スイッチング素子とトランスとを用いて所望の電圧を得るスイッチング電源装置であって、前記トランスの2次側に置かれたシャントレギュレータにて2次側出力電圧を検出し、フォトカプラを介して1次側制御ICに出力電圧情報をフィードバック電圧として帰還し出力電圧を制御し、さらに、2次側に同期整流ICと同期整流用スイッチング素子を配置して1次側のスイッチング動作に応じて前記同期整流用スイッチング素子を制御するスイッチング電源装置において、
前記同期整流ICが異常を検出すると電流を出力して、前記シャントレギュレータの検出電圧を上昇させることを特徴とするスイッチング電源装置。 - 前記シャントレギュレータは前記2次側出力電圧を第1および第2の抵抗で分圧した電圧により前記2次側出力電圧を検出し、
前記同期整流ICは、前記の異常を検出すると出力する電流を前記第1および第2の抵抗のうち低電位側の基準電位に接続された第2の抵抗に流すことを特徴とする請求項1に記載のスイッチング電源装置。 - 前記同期整流ICは、該ICが加熱を検出したことで異常を出力するものであることを特徴とする請求項1または2に記載のスイッチング電源装置。
- 前記同期整流ICは、該ICが過電圧を検出したことで異常を出力するものであることを特徴とする請求項1または2に記載のスイッチング電源装置。
- 前記同期整流ICは、該ICが過負荷を検出したことで異常を出力するものであることを特徴とする請求項1または2に記載のスイッチング電源装置。
- 前記同期整流ICの電流出力回路が定電流回路を有し、前記同期整流ICが前記異常を検出すると該定電流回路の出力を外部に接続することを特徴とする請求項1または2に記載のスイッチング電源装置。
Priority Applications (3)
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JP2015040757A JP6745585B2 (ja) | 2015-03-02 | 2015-03-02 | スイッチング電源装置 |
CN201610082425.0A CN105939122B (zh) | 2015-03-02 | 2016-02-05 | 开关电源装置 |
US15/042,118 US10291133B2 (en) | 2015-03-02 | 2016-02-11 | Switching power supply device |
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JP2015040757A JP6745585B2 (ja) | 2015-03-02 | 2015-03-02 | スイッチング電源装置 |
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JP2016163438A true JP2016163438A (ja) | 2016-09-05 |
JP2016163438A5 JP2016163438A5 (ja) | 2018-03-01 |
JP6745585B2 JP6745585B2 (ja) | 2020-08-26 |
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US (1) | US10291133B2 (ja) |
JP (1) | JP6745585B2 (ja) |
CN (1) | CN105939122B (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2018007422A (ja) * | 2016-07-01 | 2018-01-11 | ローム株式会社 | 絶縁同期整流型dc/dcコンバータ、その保護方法、電源アダプタおよび電子機器 |
US11005382B2 (en) | 2018-10-05 | 2021-05-11 | Rohm Co., Ltd. | Synchronous rectification controlling device, isolated synchronous-rectification DC-DC converter, gate driving device, isolated DC-DC converter, AC-DC converter, power adapter, and electric appliance |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
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JP6745585B2 (ja) * | 2015-03-02 | 2020-08-26 | 富士電機株式会社 | スイッチング電源装置 |
JP6723038B2 (ja) * | 2016-03-23 | 2020-07-15 | ローム株式会社 | 絶縁同期整流型dc/dcコンバータ、同期整流回路、電源アダプタおよび電子機器、制御方法 |
JP6747203B2 (ja) * | 2016-09-15 | 2020-08-26 | 富士電機株式会社 | スイッチング電源装置 |
US10680526B2 (en) | 2017-01-13 | 2020-06-09 | Analog Devices Global | Power transfer and feedback across a common isolator |
CN106712483B (zh) * | 2017-02-28 | 2019-01-22 | 维沃移动通信有限公司 | 一种同步整流电路、充电器及充电器的保护方法 |
TWI622257B (zh) * | 2017-07-05 | 2018-04-21 | 力林科技股份有限公司 | 電源轉換裝置及其同步整流電路 |
JP7108173B2 (ja) * | 2018-01-22 | 2022-07-28 | ミツミ電機株式会社 | スイッチング電源装置および直流電源装置 |
US10601333B2 (en) | 2018-08-22 | 2020-03-24 | Infineon Technologies Austria Ag | Feedforward enhanced feedback control in isolated switched-mode power converters with secondary-side rectified voltage sensing |
US11502595B2 (en) * | 2018-09-06 | 2022-11-15 | Infineon Technologies Austria Ag | Voltage and current protection in isolated switched-mode power converters with secondary-side rectified voltage sensing |
US10770983B2 (en) | 2018-12-06 | 2020-09-08 | Infineon Technologies Austria Ag | Circuits and methods for secondary-side rectified voltage sensing in isolated switched-mode power converters |
CN110380618A (zh) * | 2019-07-05 | 2019-10-25 | 西安矽力杰半导体技术有限公司 | 开关状态控制方法、控制电路及反激式变换器 |
US10910954B1 (en) * | 2019-09-23 | 2021-02-02 | Cypress Semiconductor Corporation | Power saving technique in detach condition for USB-power delivery with integrated synchronous recitifier controller |
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2018007422A (ja) * | 2016-07-01 | 2018-01-11 | ローム株式会社 | 絶縁同期整流型dc/dcコンバータ、その保護方法、電源アダプタおよび電子機器 |
US11005382B2 (en) | 2018-10-05 | 2021-05-11 | Rohm Co., Ltd. | Synchronous rectification controlling device, isolated synchronous-rectification DC-DC converter, gate driving device, isolated DC-DC converter, AC-DC converter, power adapter, and electric appliance |
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US10291133B2 (en) | 2019-05-14 |
CN105939122B (zh) | 2019-07-23 |
US20160261200A1 (en) | 2016-09-08 |
JP6745585B2 (ja) | 2020-08-26 |
CN105939122A (zh) | 2016-09-14 |
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