具有混合控制功率开关的固态照明驱动器

• Format: Patent
• Language: Chinese
• Published: 11.01.2017
• Subjects: ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY

本申请文件涉及照明系统，还揭露了驱动电路的控制单元。驱动电路用于驱动固态SSL装置,该SSL装置的地输入电压为使用切相调光器从电源电压获取。驱动电路包括可被控制处于第模式及第二模式的晶体管。其中，在第模式，晶体管以换向周期率在开启模式及关闭模式之间切换，在第二模式，使持续可控大小的电流流过晶体管。功率转换网络与处于第模式的晶体管结合在起提供开关模式功率转换器。控制单元用于控制晶体管处于第模式或者第二模式，控制晶体管在第时刻从第模式切换为第二模式；在第二时刻，确定输入电压是否超过了预设的输入电压阈值，且第二时刻与第时刻连续，如此即可控制SSL装置的亮度。 The present document relates to illumination systems, in particular to a method and system for controlling the degree of dimming of solid state lighting devices such as LED or OLED assemblies. A driver circuit is configured to drive a solid state lightening, referred to as SSL, device, subject to an input voltage derived from a mains voltage using a phase-cut dimmer. The driver circuit comprises a transistor operable in a first mode and in a second mode; wherein in the first mode, the transistor alternates between an on-state and an off-state at a commutation cycle rate; wherein in the second mode, the transistor is controlled so that it is traversed by a current at a continuously controllable level; and a power converter network conf