摘要:
The application discloses a power supply circuit for control circuit of LED lighting, the LED lighting comprising a plurality of LED light sources connected in series and a control switch for controlling on and off of current path of the LED light sources. The power supply circuit is characterized in that it comprises a first PNP transistor whose collector is coupled to power input of the control circuit, emitter is coupled to a first node between a first group of LED light sources and a second group of LED light sources upstream the control switch, and base is coupled to a second node between the control switch and the second group of LED light sources, such that when the control switch controls the current path to close, the first PNP transistor is on and when the control switch controls the current path to open, the first PNP transistor is off; a second NPN transistor whose base is coupled to emitter of the first PNP transistor, emitter is coupled to the power input of the control circuit, and collector is coupled to power input of the plurality of LED light sources. The application further relates to LED lighting comprising the power supply circuit.
摘要:
A constant current source circuit includes a main circuit, wherein the main circuit includes a first three-terminal regulator, a transistor, a sample resistor and a load, an output terminal of the first three-terminal regulator is connected with a control Electrode of the transistor, a reference Electrode of the transistor is connected with a voltage input terminal, a working Electrode is connected with one end of the load, and the other end of the load is connected with one end of the sample resistor, and the other end of the sample resistor and an input terminal of the first three-terminal regulator are connected to a reference potential, respectively, wherein the constant current source circuit further includes an adjusting unit that includes a voltage stabilizing unit, a fourth resistor and a fifth resistor.
摘要:
A lighting device may include a tube and end caps located at two ends of the tube, a lighting assembly arranged in the tube, a driver for the lighting assembly, an antenna, and a wireless communication circuit for conducting wireless communication, the antenna being provided in the end cap and the wireless communication circuit being provided in the tube or at least partially provided in the end cap, and one side of the wire communication circuit being connected to the driver and the other side thereof being connected to the antenna.
摘要:
There are provided a load driver and a luminaire including the load driver. The load driver include a voltage limiting circuit including a first polar capacitor and a second polar capacitor connected in inverse series, which are connected in parallel respectively with first and second current limiting elements, where the first and second current limiting elements limit the direction in which current flows so that current flows through different polar capacitors in positive and negative halves of a cycle of an alternating-current power supply. With this load driver, the following technical effects can be achieved: a saved space, a lowed cost, higher power available, etc.
摘要:
A master illuminating device may include an illuminating module, and a signal acquisition and processing unit for detecting the surrounding and outputting a control signal. The illuminating module is designed to receive the control signal and is driven according to the control signal. The illuminating device further include a signal transmission unit which is designed to receive the control signal and is designed to transmit the control signal.
摘要:
A lighting device may include a tube and end caps located at two ends of the tube, a lighting assembly arranged in the tube, a driver for the lighting assembly, an antenna, and a wireless communication circuit for conducting wireless communication, the antenna being provided in the end cap and the wireless communication circuit being provided in the tube or at least partially provided in the end cap, and one side of the wire communication circuit being connected to the driver and the other side thereof being connected to the antenna.
摘要:
The present invention relates to a driving device (1, 2, N) for an illuminating device, the illuminating device comprising a plurality of sub illuminating units (D12, D22, DN2), the driving device comprises a plurality of sub driving modules (L1, C1; L2, C2; LN, CN) in series connected to an input voltage source to distributively store energy from the input voltage source, each of the sub driving modules (L1, C1; L2, C2; LN, CN) being allocated to and electrically connected with one sub illuminating unit (D12, D22, DN2), so as to release the stored energy of a sub driving module (L1, C1; L2, C2; LN, CN) to the sub illuminating unit (D12, D22, DN2) allocated thereto. According to the present invention, an LED lamp having a small volume can be realized, and the layout of the LED lamp on the circuit board is easier and safer.