Abstract: A lighting apparatus includes a surge voltage protector, a first rectifier, a first DC-DC converter, a first DC filter, a first constant current source, a second rectifier, a second DC-DC converter, a second DC filter, a second constant current source, a first PWM generator, a second PWM generator, a dimmer controller, a first light source and a second light source. The surge voltage protector is coupled to an external power for relaying an AC power. When there is a surge voltage is detected, the surge voltage protector disable routing the AC power. There are two or more paths of power circuits each generating a limited power. These power circuits are placed in the same container to simplify the overall design.

Abstract: A lighting apparatus includes a surge voltage protector, a first rectifier, a first DC-DC converter, a first DC filter, a first constant current source, a second rectifier, a second DC-DC converter, a second DC filter, a second constant current source, a first PWM generator, a second PWM generator, a dimmer controller, a first light source and a second light source. The surge voltage protector is coupled to an external power for relaying an AC power. When there is a surge voltage is detected, the surge voltage protector disable routing the AC power. There are two or more paths of power circuits each generating a limited power. These power circuits are placed in the same container to simplify the overall design.

Abstract: A lighting apparatus includes a rectifier, a set of light sources and a set of driver modules. The rectifier has a neutral node connected to a neutral wire and a hot node connected to a hot wire for connecting to an external power source. A manual switch is placed between the external power source and the neutral node. The switch controller is connected to the neutral node for detecting an operation of the manual switch among multiple candidate operations. Each candidate operation is associated to a set of control signals. Each driver module has a first end connected to the rectifier and a second end connected to the switch controller for receiving a corresponding control signal to drive one corresponding light source from the set of light sources. The driver module includes a constant current source and a switch unit.

Abstract: A programmable light apparatus includes a LED module and a driver. The driver has a current adjustable circuit that supports multiple types of LED modules. By sending a programming signal to a wireless circuit of the driver, the current adjustable circuit determines a correct setting to provide a necessary driving current to a corresponding LED module.

Abstract: A LED driving circuit includes a DALI module, a linear voltage luminance adjusting module, a DIP luminance adjusting module, a control module, a power source, a constant current driving module and an output module. The DALI module generates a PWM signal. The linear voltage luminance adjusting module generates a second PWM signal. The DIP luminance adjusting module generates a switch signal. The control module generates a drive PWM signal using the first PWM signal, the second PWM signal and the switch signal. The power source provides power. The constant current driving module generates a constant-current drive voltage using the provided power and the drive PWM signal. The output module generates a drive current that responds to the constant-current drive voltage. And the output module drives an external LED device using the drive current.

Abstract: A lighting apparatus includes a rectifier, a set of light sources and a set of driver modules. The rectifier has a neutral node connected to a neutral wire and a hot node connected to a hot wire for connecting to an external power source. A manual switch is placed between the external power source and the neutral node. The switch controller is connected to the neutral node for detecting an operation of the manual switch among multiple candidate operations. Each candidate operation is associated to a set of control signals. Each driver module has a first end connected to the rectifier and a second end connected to the switch controller for receiving a corresponding control signal to drive one corresponding light source from the set of light sources. The driver module includes a constant current source and a switch unit.

Abstract: An LED driving circuit includes a power source, a first voltage stepping-down module, a constant current driving module, a second voltage stepping-down module, a DIP switch module, a control module and a loading module. The power source provides a source voltage. The first voltage stepping-down module reduces the source voltage's voltage level and correspondingly generates a first buck voltage. The second voltage stepping-down module reduces the first buck voltage's voltage level to generate a second buck voltage. The DIP switch module generates a maximal current indicating signal according to the second bulk voltage. The control module generates a PWM signal based on the second buck voltage and the maximal current indicating signal. The constant current driving module generates a drive current according to the first buck voltage and the PWM signal, and drives the loading module using the drive current.

Abstract: A LED driver circuit includes a first voltage drop module, a constant current driving module, a second voltage drop module, a DIP switch module, an auxiliary winding module, a control module and a loading module. The loading module is driven by converting a direct current voltage. The converted direct current voltage is additionally bucked to generate an optimized voltage that powers the DIP switch module and the control module. The DIP switch module selects a level of a predetermined current and in turn outputs an electrical signal to the control module. Therefore, the control module outputs a corresponding pulse signal for regulating a current passing through the loading module. Meanwhile, the control module calculates a required voltage level for driving. And the control module compares the required voltage level with an actual voltage value output by the auxiliary winding module and then determines the working status of the loading module.

Abstract: A LED driving circuit includes a DALI module, a linear voltage luminance adjusting module, a DIP luminance adjusting module, a control module, a power source, a constant current driving module and an output module. The DALI module generates a PWM signal. The linear voltage luminance adjusting module generates a second PWM signal. The DIP luminance adjusting module generates a switch signal. The control module generates a drive PWM signal using the first PWM signal, the second PWM signal and the switch signal. The power source provides power. The constant current driving module generates a constant-current drive voltage using the provided power and the drive PWM signal. The output module generates a drive current that responds to the constant-current drive voltage. And the output module drives an external LED device using the drive current.

Abstract: An LED driving circuit includes a power source, a first voltage stepping-down module, a constant current driving module, a second voltage stepping-down module, a DIP switch module, a control module and a loading module. The power source provides a source voltage. The first voltage stepping-down module reduces the source voltage's voltage level and correspondingly generates a first buck voltage. The second voltage stepping-down module reduces the first buck voltage's voltage level to generate a second buck voltage. The DIP switch module generates a maximal current indicating signal according to the second bulk voltage. The control module generates a PWM signal based on the second buck voltage and the maximal current indicating signal. The constant current driving module generates a drive current according to the first buck voltage and the PWM signal, and drives the loading module using the drive current.

Abstract: A LED driver circuit includes a first voltage drop module, a constant current driving module, a second voltage drop module, a DIP switch module, an auxiliary winding module, a control module and a loading module. The loading module is driven by converting a direct current voltage. The converted direct current voltage is additionally bucked to generate an optimized voltage that powers the DIP switch module and the control module. The DIP switch module selects a level of a predetermined current and in turn outputs an electrical signal to the control module. Therefore, the control module outputs a corresponding pulse signal for regulating a current passing through the loading module. Meanwhile, the control module calculates a required voltage level for driving. And the control module compares the required voltage level with an actual voltage value output by the auxiliary winding module and then determines the working status of the loading module.

Abstract: A programmable light apparatus includes a LED module and a driver. The driver has a current adjustable circuit that supports multiple types of LED modules. By sending a programming signal to a wireless circuit of the driver, the current adjustable circuit determines a correct setting to provide a necessary driving current to a corresponding LED module.