TWI457035B - Ｌｅｄ驅動電路 - Google Patents

Ｌｅｄ驅動電路 Download PDF

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Publication number
TWI457035B
TWI457035B TW100100892A TW100100892A TWI457035B TW I457035 B TWI457035 B TW I457035B TW 100100892 A TW100100892 A TW 100100892A TW 100100892 A TW100100892 A TW 100100892A TW I457035 B TWI457035 B TW I457035B
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TW
Taiwan
Prior art keywords
current
signal
switching
controller
generate
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TW100100892A
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English (en)
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TW201129235A (en
Inventor
Ta Yung Yang
Chuh Ching Li
Ming Chieh Lee
Kuo Hsien Huang
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System General Corp
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Application filed by System General Corp filed Critical System General Corp
Publication of TW201129235A publication Critical patent/TW201129235A/zh
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    • 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
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/382—Switched mode power supply [SMPS] with galvanic isolation between input and output
    • 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
    • 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

  • Dc-Dc Converters (AREA)
  • Electronic Switches (AREA)

Claims (12)

  1. 一種LED驅動電路，其包含有：一控制器，依據一磁性裝置之一切換電流產生一電流控制訊號，並依據該電流控制訊號產生一切換訊號而切換該磁性裝置，以產生一輸出電流驅動複數LED；以及一可調整訊號，穩定調整該控制器之該電流控制訊號；其中，該切換訊號依據該電流控制訊號而調變，以穩定調整該輸出電流，該輸出電流之準位相關聯於該電流控制訊號。
  2. 如申請專利範圍第1項所述之LED驅動電路，其中該切換訊號控制該磁性裝置之該切換電流，該磁性裝置為一離線式變壓器。
  3. 如申請專利範圍第1項所述之LED驅動電路，其中該可調整訊號依據該LED驅動電路之一交流輸入而產生。
  4. 如申請專利範圍第1項所述之LED驅動電路，其中該控制器為一一次側控制器，其耦接於該磁性裝置之一一次側繞組以切換該磁性裝置之該一次側繞組。
  5. 如申請專利範圍第1項所述之LED驅動電路，其中，該控制器更包含一取樣保持電路以取樣一電流回授訊號，以產生該電流控制訊號，該電流回授訊號相關聯於該磁性裝置之該切換電流，當該LED驅動電路之一交流輸入低於一低電壓門檻時，該取樣保持電路停止取樣該電流回授訊號。
  6. 如申請專利範圍第1項所述之LED驅動電路，更包含一最大工作週期電路，以限制該切換訊號之一最大工作週期。
  7. 如申請專利範圍第6項所述之LED驅動電路，其中該切換訊號之該最大工作週期被限制低於50%。
  8. 一種LED驅動器，其包含有：一控制器，依據一變壓器之一切換電流產生一切換訊號而切換一變壓器，以產生耦接於該控制器之一電流輸入訊號與一輸出電流而驅動複數LED；以及一可調整訊號，穩定調變該電流輸入訊號； 其中，該電流輸入訊號更用於產生一電流控制訊號，該電流輸入訊號相關聯於該變壓器之該切換電流，該切換訊號受控於該電流控制訊號，以穩定調整該輸出電流，該輸出電流之準位相關聯於該電流控制訊號。
  9. 如申請專利範圍第8項所述之LED驅動器，其中該控制器為一一次側控制器，其耦接於該變壓器之一一次側繞組，以切換該變壓器之該一次側繞組。
  10. 如申請專利範圍第8項所述之LED驅動器，其中該控制器包含一取樣保持電路，以取樣該電流輸入訊號而產生該切換訊號，當該LED驅動器之一輸入電壓低於一低電壓門檻時，該取樣保持電路則停止取樣該電流輸入訊號。
  11. 如申請專利範圍第8項所述之LED驅動器，更包含一最大工作週期電路，以限制該切換訊號之一最大工作週期。
  12. 如申請專利範圍第11項所述之LED驅動器，其中該切換訊號之該最大工作週期被限制低於50%。
TW100100892A 2010-01-11 2011-01-11 Ｌｅｄ驅動電路 TWI457035B (zh)

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US33574910P 2010-01-11 2010-01-11

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TW201129235A TW201129235A (en) 2011-08-16
TWI457035B true TWI457035B (zh) 2014-10-11

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US (5) US8742677B2 (zh)
CN (1) CN102065616B (zh)
TW (1) TWI457035B (zh)

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TW201129235A (en) 2011-08-16
US10531528B2 (en) 2020-01-07
CN102065616A (zh) 2011-05-18
US11026309B2 (en) 2021-06-01
US20200107414A1 (en) 2020-04-02
US20110169418A1 (en) 2011-07-14
US9049764B2 (en) 2015-06-02
US20150264761A1 (en) 2015-09-17
US20140232284A1 (en) 2014-08-21
US10412796B2 (en) 2019-09-10
CN102065616B (zh) 2016-09-07
US20190350057A1 (en) 2019-11-14
US8742677B2 (en) 2014-06-03

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