JP6590136B2 - Dc/dcコンバータ及び表示装置 - Google Patents
Dc/dcコンバータ及び表示装置 Download PDFInfo
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- JP6590136B2 JP6590136B2 JP2014526842A JP2014526842A JP6590136B2 JP 6590136 B2 JP6590136 B2 JP 6590136B2 JP 2014526842 A JP2014526842 A JP 2014526842A JP 2014526842 A JP2014526842 A JP 2014526842A JP 6590136 B2 JP6590136 B2 JP 6590136B2
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- 230000010355 oscillation Effects 0.000 claims description 40
- 238000001514 detection method Methods 0.000 claims description 39
- 239000003990 capacitor Substances 0.000 claims description 13
- 230000004907 flux Effects 0.000 description 17
- 238000010586 diagram Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 238000010248 power generation Methods 0.000 description 9
- 230000007423 decrease Effects 0.000 description 7
- 238000009499 grossing Methods 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002595 magnetic resonance imaging Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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Classifications
-
- 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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators
-
- 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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/06—Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
-
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
-
- 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
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Radiation-Therapy Devices (AREA)
Description
〜:ニアリーイコール
L0:外部磁界が無い場合のインダクタL0のインダクタンス値
L0m:強磁界下でのインダクタL0のインダクタンス値
L1m:強磁界下でのインダクタL1のインダクタンス値
VOUT=(R1+R2)×If/b … 式6
VOUT=Vf/bic×(R1+R2)/R2=Vf/bic×(1+(R1/R2)) … 式7
VOUTm:DC/DCコンバータが強磁界下に置かれた場合の出力電圧値
20 電源供給源
30 電源生成回路
30a、30b、30c DC/DCコンバータ
31 インダクタ
32 スイッチングFET
33 発振IC
34 整流ダイオード
35 平滑コンデンサ
36、37 抵抗
38 強磁界下検出回路
39 強磁界下ラッチ動作回避回路
39a 発振周波数制御回路
39b インダクタンス制御回路
39c F/B電圧制御回路
40 映像信号供給源
50 映像信号処理回路
60 表示装置駆動ドライバ
70 表示装置走査用ドライバ
80 映像表示部
Claims (8)
- 入力端子に一端が接続されたインダクタと、
前記インダクタの他端と接地との間に接続されたスイッチング素子と、
前記インダクタの他端と出力端子との間に接続されたダイオードと、
前記出力端子と接地との間に接続されたコンデンサと、
前記出力端子と接地との間に接続され、出力電圧を分圧したフィードバック電圧を出力するフィードバック回路と、
前記フィードバック電圧が入力され、前記フィードバック電圧に応じた周波数で前記スイッチング素子をON/OFF制御する発振回路と、
外部磁界を検出し、検出した磁界が予め定めた閾値を超えるか否かに応じて異なる信号を出力する検出回路と、
前記出力電圧が一定の状態にて、検出した磁界が前記閾値を超えることを示す前記信号が前記検出回路から出力されると、電圧出力の停止を抑制する制御回路と、を備える、
ことを特徴とするDC/DCコンバータ。 - 前記制御回路は、前記検出回路が前記閾値を超える磁界を検出したときに出力される信号が入力されたら、前記スイッチング素子をON/OFF制御する周波数を高くする制御を行う、
ことを特徴とする請求項1に記載のDC/DCコンバータ。 - 外部磁界が無い又は非常に小さい場合の前記スイッチング素子を駆動する周波数をf0、前記スイッチング素子のターンON時間をTon、ターンOFF時間をToffとした場合、
前記制御回路は、前記スイッチング素子をON/OFF制御する周波数fmが、
f0<fm<1/(Ton+Toff)
を満たすように制御する、
ことを特徴とする請求項2に記載のDC/DCコンバータ。 - 前記制御回路は、第2のスイッチング素子と、前記第2のスイッチング素子がON又はOFFの時に前記インダクタに直列に接続される第2のインダクタと、前記第2のスイッチング素子をON/OFF制御するトランジスタと、を含み、前記検出回路が前記閾値を超える磁界を検出したときに出力される信号が前記トランジスタに入力されたら、前記インダクタと前記第2のインダクタとを直列に接続して、インダクタンス値を高くする制御を行う、
ことを特徴とする請求項1に記載のDC/DCコンバータ。 - 外部磁界が無い又は非常に小さい場合の前記インダクタのインダクタンス値をL0、外部磁界が前記閾値を超える場合の前記インダクタのインダクタンス値と前記第2のインダクタのインダクタンス値との総和値をLmとした場合、前記第2のインダクタは、L0とLmとが略等しくなるように設定される、
ことを特徴とする請求項4に記載のDC/DCコンバータ。 - 前記制御回路は、前記フィードバック電圧の出力経路に一端が接続される抵抗と、前記抵抗の他端と接地との間に接続されるトランジスタと、を含み、前記検出回路が前記閾値を超える磁界を検出したときに出力される信号が前記トランジスタに入力されたら、前記抵抗を無効にして、前記DC/DCコンバータの出力電圧を低くする制御を行う、
ことを特徴とする請求項1に記載のDC/DCコンバータ。 - 前記フィードバック回路の分圧用の抵抗をR1、R2、前記制御回路の抵抗をR3、外部磁界が無い又は非常に小さい場合の前記DC/DCコンバータの出力電圧をVOUT、外部磁界が前記閾値を超える場合の前記DC/DCコンバータの出力電圧をVOUTm、前記フィードバック電圧の設定値をVf/bicとした場合、
VOUT=Vf/bic×(1+(R1×((1/R2)+(1/R3))))
VOUTm=Vf/bic×(1+(R1×(1/R2)))
で表され、
前記制御回路は、
VOUTm<VOUT
を満たすように制御する、
ことを特徴とする請求項6に記載のDC/DCコンバータ。 - 請求項1乃至7のいずれか一に記載のDC/DCコンバータを備える、
ことを特徴とする表示装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012162164 | 2012-07-21 | ||
JP2012162164 | 2012-07-21 | ||
PCT/JP2013/068600 WO2014017279A1 (ja) | 2012-07-21 | 2013-07-08 | Dc/dcコンバータ及び表示装置 |
Publications (2)
Publication Number | Publication Date |
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JPWO2014017279A1 JPWO2014017279A1 (ja) | 2016-07-07 |
JP6590136B2 true JP6590136B2 (ja) | 2019-10-16 |
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US (1) | US9231474B2 (ja) |
JP (1) | JP6590136B2 (ja) |
CN (1) | CN104521124B (ja) |
WO (1) | WO2014017279A1 (ja) |
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JP6384316B2 (ja) * | 2014-12-25 | 2018-09-05 | 日産自動車株式会社 | 電力変換装置及び電力変換装置の制御方法 |
US9723667B1 (en) * | 2015-04-09 | 2017-08-01 | Universal Lighting Technologies, Inc. | Output tuning and dimming interface for an LED driver |
US9693411B1 (en) * | 2015-04-09 | 2017-06-27 | Universal Lighting Technologies, Inc. | LED driver configuration and dimming interface for dynamic adjustment of driver operating parameters |
US9769896B1 (en) | 2015-12-04 | 2017-09-19 | Universal Lighting Technologies, Inc. | LED driver with offline tuning interface using hot and neutral inputs |
CN106911251B (zh) * | 2015-12-22 | 2020-05-22 | 上海贝岭股份有限公司 | 降压功率变换器 |
CN105896984B (zh) * | 2016-06-21 | 2018-06-29 | 清华大学 | Boost电路及DC-DC模块,刺激电路和植入式医疗器械 |
US10560993B1 (en) | 2018-03-08 | 2020-02-11 | Universal Lighting Technologies, Inc. | Dimming controller for LED driver and method of indirect power estimation |
CN111478583B (zh) * | 2020-04-24 | 2021-04-20 | 无锡芯朋微电子股份有限公司 | 开关电源控制电路及应用该电路的开关电源控制方法 |
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JP3707436B2 (ja) * | 2002-01-25 | 2005-10-19 | 株式会社村田製作所 | スイッチング電源装置 |
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JP4196697B2 (ja) | 2003-02-27 | 2008-12-17 | 三菱電機株式会社 | 電力変換装置 |
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- 2013-07-08 WO PCT/JP2013/068600 patent/WO2014017279A1/ja active Application Filing
- 2013-07-08 US US14/415,949 patent/US9231474B2/en active Active
- 2013-07-08 CN CN201380038850.4A patent/CN104521124B/zh active Active
- 2013-07-08 JP JP2014526842A patent/JP6590136B2/ja active Active
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CN104521124B (zh) | 2018-01-02 |
US20150180337A1 (en) | 2015-06-25 |
JPWO2014017279A1 (ja) | 2016-07-07 |
US9231474B2 (en) | 2016-01-05 |
CN104521124A (zh) | 2015-04-15 |
WO2014017279A1 (ja) | 2014-01-30 |
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R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |