LIGHTING DEVICE AND ILLUMINATION EQUIPMENT

• Main Authors: NAKASHIRO AKIRA, MAKIMURA SHINJI
• Format: Patent
• Language: English; Japanese
• Published: 20.06.2016
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERATION

PROBLEM TO BE SOLVED: To provide a lighting device and illumination equipment that can enhance stability of the operation at the re-start time.SOLUTION: A lighting device 4 has a buck converter 40, a control circuit 41, a bootstrap circuit, a first control power supply circuit 42 and a second control power supply circuit 43. The bootstrap circuit is configured to generate a driving voltage HVcc which is required to perform ON/OFF operation on switching elements Q21, Q22 of the buck converter 40 by the control circuit 41. The first control power supply circuit 42 is configured to supply a first control power supply voltage Vcc to the bootstrap circuit. The second control power supply circuit 43 is configured to generate a driving voltage HVcc only when the bootstrap circuit does not normally operate.SELECTED DRAWING: Figure 1 【課題】再起動時における動作の安定性の向上を図る。【解決手段】点灯装置４は、バックコンバータ４０と、制御回路４１と、ブートストラップ回路と、第１制御電源回路４２と、第２制御電源回路４３とを備える。ブートストラップ回路は、制御回路４１がバックコンバータ４０のスイッチング素子Ｑ２１、Ｑ２２をオンオフ駆動するために必要な駆動電圧ＨＶccを生成するように構成される。第１制御電源回路４２は、ブートストラップ回路に第１制御電源電圧Ｖccを供給するように構成される。第２制御電源回路４３は、ブートストラップ回路が正常に動作し得ないときにのみ、駆動電圧ＨＶccを生成するように構成される。【選択図】 図１