Self Electronics Co., Ltd.

Xuejun Zou

Xiaobo You

Xiaoyong Zhou

The invention relates to a lighting load abnormality detecting device, the device including a power supply module, which is configured to provide power supply for the detecting device and the lighting load connected with the detecting device; a detecting circuit is configured to detect the abnormal state of the lighting load; a control module is configured to judge whether the lighting load is abnormal or not according to the detecting circuit feedback detection information; the detecting circuit includes a parallel PWM detection circuit and a static detection circuit; the static detecting circuit is configured to independently detect anomalies when the abnormality detecting device has no pulse loading or to cooperate with the pulse width modulation detecting circuit to jointly detect anomalies when there is pulse loading.

Lighting load abnormality detecting device and corresponding lighting system

A DC power supply for preventing output from being misconnected to a power supply and its LED lamp and control system, comprise a DC power supply and an anti-misconnection module. The DC power supply comprises a positive output terminal and a negative output terminal. The anti-misconnection module comprises a positive access terminal and a negative access terminal which are electrically connected to the positive and negative output terminals of the DC power supply respectively, a NMOS transistor controlling on-off of the negative access terminal, a load access unit performing a turn-on operation of the NMOS transistor, a forward-blocking unit performing a turn-off operation of the NMOS transistor, and a backward access unit performing a turn-off operation of the NMOS transistor. The present invention prevents the DC power supply from being damaged even if the positive access terminal and the negative access terminal of the DC power supply are mis-connected to the external power supply, such as the electric supply or the dry battery. As long as the external power supply is removed and the normal load is connected, such as LED lamps, the DC power supply of the present invention can work normally, so that it can not only improve the reliability of power supply products, but also can reduce the corresponding maintenance workload.

DC power supply and its LED lamp and control system

A system for regulating the minimum output current of an LED dimming power supply, comprising: an initial value setting module, a data detection module, a data processing module, an output adjustment module, a DC/DC current output module electrically connected with the output adjustment module, a regulated load connected in series at the output of the DC/DC current output module, and an output regulation module. The present invention is capable of utilizing those modules mentioned above to make the regulated load modularization and standardization. It means that the resistance of the regulated load is designed to a standard value, and the regulated load is set in a standard module, when the batches of LED dimming power supply need to regulate the minimum output current. The output of the LED dimming power supply are electrically connected to the standard module provided with the regulated load to complete the setting of the minimum output current of the LED dimming power supply, so as to avoid human error caused by manual calibration.

System for regulating the minimum output current of an LED dimming power supply

A constant current power supply with a plurality of current outputs for LED lamps includes a DC/DC control module, an overvoltage detection circuit, a current sampling resistor, at least one output current conversion circuit and at least one overvoltage protection resistor. The output current conversion circuit includes a switch, a MOS transistor with a grid electrode electrically connected to the switch, and a current conversion sampling resistor. The overvoltage protection resistor is connected in series between the two voltage sampling resistors and the grid electrode of the MOS transistor. The constant current power supply of the present invention can output various current values through the output current conversion circuit so as to be able to adapt to different LED loads. One power supply can be applied in a variety of applications.

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Zhejiang, China

Xuejun Zou