Constant voltage circuit adapted to silicon controlled rectifier, LED dimming circuit, and related LED lighting device

摘要

The present disclosure provides a silicon controlled rectifier (SCR) compatible constant voltage circuit. An SCR compatible constant voltage circuit disclosed herein includes an input undervoltage control module, an overpower protection module, a controllable load module, and a power conversion module. Furthermore, one terminal of the SCR is connected to the power conversion module, and the other terminal of the SCR is connected to the power supply module. The input undervoltage control module, the overpower protection module, and the controllable load module are respectively connected in parallel between a first sampling point and the power conversion module, where the first sampling point is the It arrange | positions between SCR and the said power conversion module. The power conversion module is connected to a load module and configured to convert an electrical signal provided by the power supply module into a constant voltage. [Selection] Figure 1