JP6554888B2 - 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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- JP6554888B2 JP6554888B2 JP2015082930A JP2015082930A JP6554888B2 JP 6554888 B2 JP6554888 B2 JP 6554888B2 JP 2015082930 A JP2015082930 A JP 2015082930A JP 2015082930 A JP2015082930 A JP 2015082930A JP 6554888 B2 JP6554888 B2 JP 6554888B2
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- voltage
- power supply
- inductor
- control circuit
- semiconductor switch
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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
- 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
-
- 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
- H02M1/0003—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
- H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
-
- 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
- H02M1/0064—Magnetic structures combining different functions, e.g. storage, filtering or transformation
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Description
このスイッチング電源装置は、直流入力電圧Vinを受ける入力端子11を有し、この入力端子11は、コンデンサC1の一方の端子に接続されるとともに、トランスTの一次巻線Npの一方の端子に接続されている。コンデンサC1の他方の端子は、電位が一次側のグランドGNDの電位に等しい入力端子12に接続されている。トランスTの一次巻線Npの他方の端子は、MOSFET(Metal Oxide Semiconductor Field Effect Transistor)からなる半導体スイッチS1のドレインに接続されている。半導体スイッチS1のソースは、制御回路13の端子GNDと入力端子12とに接続されている。
制御回路13は、図示はしないが、自身に印加される電源の電圧VCCを監視し、電圧VCCがOVP閾値電圧を超えた場合、または、UVLO閾値電圧を下回った場合に制御回路13の動作を停止する保護回路を備えている。そのため、制御回路13の動作を保証するには、制御回路用電源回路で生成される電圧VCCは、負荷状態に関係なく、OVP閾値電圧とUVLO閾値電圧との間に収まるように調整されなければならない。
13 制御回路
14,15 出力端子
16 出力電圧検出部
21 サンプルホールド回路
22 誤差増幅器
23 PWM回路
24 比較器
C1,C2,C3,C4 コンデンサ
D1,D2 ダイオード
Iout 出力電流
L インダクタ
Naux 補助巻線
Np 一次巻線
Ns 二次巻線
R1,R2,R4 抵抗
R3 ダミー抵抗
S1,S2,S3 半導体スイッチ
SW スイッチ
T トランス
Vout 出力電圧
Vref,Vref1 基準電圧
Claims (5)
- 直流電圧が入力される一次巻線、二次巻線および補助巻線を有するトランスと、
前記一次巻線に直列に接続されてスイッチング動作を行う半導体スイッチと、
前記二次巻線の出力を整流平滑して出力電圧を出力する出力電圧生成回路と、
前記補助巻線に接続されて前記出力電圧生成回路の前記出力電圧に相当する出力電圧検出信号を生成して出力する出力電圧検出部と、
前記出力電圧検出信号を受けて基準電圧との誤差信号を生成し、前記誤差信号に応じたスイッチング周波数で前記半導体スイッチをスイッチング制御する制御回路と、
前記補助巻線にアノードが接続された整流ダイオード、一端が前記整流ダイオードのカソードに接続されたインダクタおよび該インダクタの他端に接続されたコンデンサを有して前記制御回路の電源電圧を生成する制御回路用電源回路と、
前記制御回路用電源回路の前記インダクタに並列に接続されたスイッチと、
を備え、
前記制御回路は、前記誤差信号を閾値電圧と比較して負荷状態を判断する負荷状態判断部を有し、前記負荷状態判断部は、前記誤差信号が前記閾値電圧より高くなって重負荷と判断しているとき、前記スイッチをオフし、前記誤差信号が前記閾値電圧以下になって軽負荷と判断しているとき、前記スイッチをオンする制御信号を出力することを特徴とするスイッチング電源装置。 - 前記誤差信号に応じた周波数に生成される前記スイッチング周波数は、前記誤差信号が大きくなって前記閾値電圧に等しい第1の閾値電圧に達するまでは、最低の固定周波数であり、前記誤差信号が前記第1の閾値電圧より高い第2の閾値電圧を超えると最大の固定周波数であり、前記誤差信号が前記第1の閾値電圧と前記第2の閾値電圧との間では前記誤差信号が大きくなるにつれて高くなる周波数であることを特徴とする請求項1記載のスイッチング電源装置。
- 前記スイッチは、前記インダクタに並列に接続された第2の半導体スイッチと、前記負荷状態判断部からの前記制御信号を受けて前記第2の半導体スイッチのオン・オフを制御する第3の半導体スイッチとを有していることを特徴とする請求項1または2記載のスイッチング電源装置。
- 前記第2の半導体スイッチは、ソースが前記整流ダイオードと前記インダクタとの接続点に接続され、ドレインが前記インダクタと前記コンデンサとの接続点に接続され、ゲートが抵抗を介して前記ソースに接続されたP型MOSトランジスタであり、前記第3の半導体スイッチは、コレクタが前記ゲートに接続され、エミッタがグランドに接続され、ベースが前記負荷状態判断部からの前記制御信号を受けるように接続されたNPN型バイポーラトランジスタであることを特徴とする請求項3記載のスイッチング電源装置。
- 前記スイッチは、前記制御回路の中に構成されていることを特徴とする請求項3記載のスイッチング電源装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2015082930A JP6554888B2 (ja) | 2015-04-15 | 2015-04-15 | スイッチング電源装置 |
US15/063,064 US9490714B1 (en) | 2015-04-15 | 2016-03-07 | Switching power supply |
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JP2015082930A JP6554888B2 (ja) | 2015-04-15 | 2015-04-15 | スイッチング電源装置 |
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JP2016208558A JP2016208558A (ja) | 2016-12-08 |
JP6554888B2 true JP6554888B2 (ja) | 2019-08-07 |
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Families Citing this family (11)
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ITMI20150543A1 (it) * | 2015-04-15 | 2016-10-15 | Costr Elettromeccaniche P Torresan S R L | Regolatore di tensione in derivazione di protezione di un carico elettrico da sovratensioni e transitori di tensione |
CN106849667B (zh) * | 2017-02-07 | 2019-05-07 | 湖南汇德电子有限公司 | 一种原边反馈恒压恒流控制器采样电路 |
KR102663510B1 (ko) * | 2018-07-16 | 2024-05-09 | 삼성전자주식회사 | 전자장치 및 그 제어방법 |
CN108683334B (zh) * | 2018-08-20 | 2024-03-12 | 无锡麟力科技有限公司 | 一种用于浮动地线buck型开关电源的电源开关状态检测电路 |
US11271483B2 (en) * | 2018-10-17 | 2022-03-08 | Texas Instruments Incorporated | Bias power regulator circuit for isolated converters with a wide output voltage range |
JP7156047B2 (ja) * | 2019-01-16 | 2022-10-19 | 株式会社島津製作所 | クロマトグラフ装置およびロードスイッチ回路 |
TWI697751B (zh) | 2019-05-22 | 2020-07-01 | 群光電能科技股份有限公司 | 電壓補償電路以及電壓補償方法 |
CN112117920B (zh) * | 2019-06-20 | 2022-02-22 | 台达电子工业股份有限公司 | 电源供应器及其控制方法及电源供应*** |
CN110855156B (zh) * | 2019-12-10 | 2021-04-16 | 格力博(江苏)股份有限公司 | 反激式开关电源 |
CN112865502B (zh) * | 2020-12-31 | 2022-06-28 | 南京南瑞继保电气有限公司 | 一种串联功率模块的自动合闸旁路保护装置及控制方法 |
US20230275573A1 (en) * | 2022-02-28 | 2023-08-31 | Texas Instruments Incorporated | Pulse frequency modulator for switched mode power supply |
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2015
- 2015-04-15 JP JP2015082930A patent/JP6554888B2/ja active Active
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US20160308448A1 (en) | 2016-10-20 |
US9490714B1 (en) | 2016-11-08 |
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