Abstract: An LED driving circuit includes a rectifying unit, a filtering unit, a power conversion unit and a leakage protection unit. The leakage protection unit includes: a main control chip capable of detecting an impedance of a power grid and turning on or off an LED driving circuit loop depending on whether the impedance of the power grid exceeds a set value; and a first switching element arranged outside the main control chip and controlled thereby to turn on or off the LED driving circuit loop synchronously with the main control chip. The present disclosure includes the first switching element capable of turning on or turning off the LED driving circuit loop, and the first switching element is arranged independently of the main control chip, achieving shunting of the current flowing through the leakage protection unit, reducing an operating temperature of the main control chip for compatibility with high power products.

Abstract: The invention provides a dimmable lighting apparatus, comprising a lamp body, and a driving circuit and a light emitting circuit in the lamp body. The driving circuit is configured to drive the light emitting circuit to emit light, and the driving circuit includes an input sub-circuit coupled to a mains and a dimming sub-circuit coupled to an external dimmer, the input sub-circuit, and the light emitting circuit. In particular, the input sub-circuit is grounded in a pre-stage manner, and the dimming sub-circuit is grounded in a post-stage manner.

Abstract: The present invention provides a dimmable lighting apparatus, comprising a light emitting circuit and a driving circuit coupled with the light emitting circuit. The driving circuit comprises a rectifier module, a filtering module coupled between the light emitting circuit and the rectifier module, a constant current module coupled between the filtering module and the light emitting circuit, and a dimming module. In particular, the dimming module is configured to receive a driving signal supplied to the light emitting circuit from the constant current module, and feed the driving signal back to the constant current module to adjust an output power of the constant current module.

Abstract: The present invention provides a dimmable lighting apparatus, comprising a light emitting circuit and a driving circuit coupled with the light emitting circuit. The driving circuit comprises a rectifier module, a filtering module coupled between the light emitting circuit and the rectifier module, a constant current module coupled between the filtering module and the light emitting circuit, and a dimming module. In particular, the dimming module is configured to receive a driving signal supplied to the light emitting circuit from the constant current module, and feed the driving signal back to the constant current module to adjust an output power of the constant current module.

Abstract: The invention provides a dimmable lighting apparatus, comprising a lamp body, and a driving circuit and a light emitting circuit in the lamp body. The driving circuit is configured to drive the light emitting circuit to emit light, and the driving circuit includes an input sub-circuit coupled to a mains and a dimming sub-circuit coupled to an external dimmer, the input sub-circuit, and the light emitting circuit. In particular, the input sub-circuit is grounded in a pre-stage manner, and the dimming sub-circuit is grounded in a post-stage manner.

Abstract: The present invention discloses an LED lamp tube, comprising a driving circuit controlled by a switch when used, the driving circuit comprises: a dimming controller having a switch state monitoring port and a power supply port, and the power supply voltage is gradually formed after the switch is disconnected. When the switch is turned on again, if the supply voltage is between the first set value and the second set value, the output of the drive signal is the same as the signal when the switch is turned off, so that the current flowing through the LED light source remains unchanged. If the supply voltage is lower than the second set value, it outputs a dynamically changing driving signal, so that the current flowing through the LED light source gradually changes from the first extreme value to the second extreme value; and the power conversion unit is configured to receive the drive signal and provide energy to the LED light source.