CN-116761303-B - Lighting device with transient current suppression function

Abstract

A lighting device with a transient current suppression function comprises a rectifying circuit, a first filter capacitor, a resistor component, a transient current suppression circuit and a voltage division circuit. Two ends of the first filter capacitor are respectively connected with the first node and the second node. The first node is connected to a first output terminal of the rectifying circuit, and the second node is connected to a ground point. Two ends of the resistor component are respectively connected with a second node and a third node, and the third node is connected with a second output end of the rectifying circuit. The transient current suppression circuit comprises a switch and a first regulating capacitor. The first end, the second end and the third end of the switch are respectively connected with the fourth node, the second node and the third node. Two ends of the first regulating capacitor are respectively connected with the second node and the third node. The two ends of the voltage dividing circuit are respectively connected with the first node and the fourth node.

Inventors

• LU FUXING
• LIN ZHIRONG

Assignees

• 厦门普为光电科技有限公司

Dates

Publication Date

20260508

Application Date

20230629

Claims (8)

1. 1. A lighting device having a transient current suppression function, comprising: A rectifying circuit; One end of the first filter capacitor is connected with a first node, the first node is connected with a first output end of the rectifying circuit, the other end of the first filter capacitor is connected with a second node, and the second node is connected with a grounding point; one end of the resistor assembly is connected with the second node, the other end of the resistor assembly is connected with a third node, and the third node is connected with the second output end of the rectifying circuit; The transient current suppression circuit comprises a switch and a first regulating capacitor, wherein a first end of the switch is connected with a fourth node, a second end of the switch is connected with the second node, a third end of the switch is connected with the third node, one end of the first regulating capacitor is connected with the second node, and the other end of the first regulating capacitor is connected with the third node, and The voltage dividing circuit, the one end of voltage dividing circuit with first node is connected, the other end of voltage dividing circuit with the fourth node is connected, voltage dividing circuit includes first resistance group, second regulation electric capacity and fifth resistance, the one end of first resistance group with first node is connected, the other end of first resistance group with the fourth node is connected, and is connected to the second resistance group, the second regulation electric capacity with the second resistance group is parallelly connected, the other end of first resistance group is passed through the fifth resistance with the fourth node is connected.
2. 2. The lighting device with a transient current suppression function according to claim 1, wherein a capacitance value of the first regulating capacitor is related to a turn-on delay time of the switch.
3. 3. The lighting device with a transient current suppression function according to claim 1, wherein the switch enters an on state at the moment when the rectifying circuit is connected to an external power supply to suppress a transient current, and returns to an off state after the transient current is suppressed.
4. 4. The lighting device with a transient current suppression function according to claim 1, wherein the transient current suppression circuit further comprises a zener diode, one end of the zener diode is connected to the second node, and the other end of the zener diode is connected to the fourth node.
5. 5. The lighting device with a transient current suppression function according to claim 1, further comprising an auxiliary resistor, wherein one end of the resistor element is connected to the second node through the auxiliary resistor.
6. 6. The lighting device with a transient current suppression function according to claim 1, wherein a capacitance value of the second regulating capacitor is related to a turn-on delay time of the switch.
7. 7. The lighting device with transient current suppression of claim 1, wherein said switch is a mosfet or a triode.
8. 8. The lighting device with transient current suppression according to claim 1, wherein the resistive component is a thermistor, a cement resistor, or a carbon film resistor.

Description

Lighting device with transient current suppression function Technical Field The present invention relates to a lighting device, and more particularly, to a lighting device with transient current suppression. Background Many factories require a large number of high power lighting devices (e.g., three-proofing lamps, panel lamps, industrial and mining lamps, etc.). Because, in order to reduce wiring and complexity and the number of control switches, it is necessary to employ an air switch and a serial circuit formed of a plurality of lighting devices. However, since the air switch generates high transient current when turned on, the number of lighting devices of the serial circuit needs to be reduced, so that the air switch cannot exert the maximum benefit. For example, if one air switch (e.g., C16) can install 16 lighting devices, but the air switch can only install 10 lighting devices because the transient current of the serial circuit of 16 lighting devices is too high (the air switch trips when the current exceeds the rated current of the air switch). Both chinese patent publication CN110798937a and chinese patent publication CN114980415A disclose technical content about suppressing transient currents, but the problems of the prior art cannot be solved effectively. Disclosure of Invention An embodiment of the invention provides a lighting device with a transient current suppression function, which comprises a rectifying circuit, a first filter capacitor, a resistor component, a transient current suppression circuit and a voltage division circuit. One end of the first filter capacitor is connected with the first node, and the other end of the first filter capacitor is connected with the second node. The first node is connected to a first output terminal of the rectifying circuit, and the second node is connected to a ground point. One end of the resistor component is connected with the second node, and the other end of the resistor component is connected with the third node. The third node is connected with the second output end of the rectifying circuit. The transient current suppression circuit comprises a switch and a first regulating capacitor. The first end of the switch is connected to the fourth node, the second end of the switch is connected to the second node, and the third end of the switch is connected to the third node. One end of the first regulating capacitor is connected with the second node, and the other end of the first regulating capacitor is connected with the third node. One end of the voltage dividing circuit is connected with the first node, and the other end of the voltage dividing circuit is connected with the fourth node. In an embodiment of the invention, a capacitance value of the first adjustment capacitor is related to a turn-on delay time of the switch. In an embodiment of the present invention, the switch enters the on state to suppress the transient current at the moment when the rectifying circuit is connected to the external power source, and returns to the off state after the transient current is suppressed. In an embodiment of the invention, the transient current suppression circuit further comprises a zener diode. One end of the zener diode is connected to the second node, and the other end of the zener diode is connected to the fourth node. In an embodiment of the invention, the lighting device further includes an auxiliary resistor, and one end of the resistor assembly is connected to the second node through the auxiliary resistor. In an embodiment of the invention, the voltage dividing circuit includes a first resistor group and a second resistor group. One end of the first resistor group is connected with the first node, and the other end of the first resistor group is connected with the fourth node and connected to the second resistor group. In an embodiment of the invention, the voltage dividing circuit further includes a second adjusting capacitor and a fifth resistor. The second regulating capacitor is connected in parallel with the second resistor group. The other end of the first resistor group is connected with the fourth node through a fifth resistor. In an embodiment of the invention, a capacitance value of the second adjustment capacitor is related to a turn-on delay time of the switch. In one embodiment of the present invention, the switch is a mosfet or a triode. In one embodiment of the present invention, the resistive element is a thermistor (e.g., a negative temperature coefficient thermistor), a cement resistor, a carbon film resistor, or other similar element. As described above, the lighting device with transient current suppression according to the embodiments of the present invention may have one or more of the following advantages: (1) The lighting device comprises a rectifying circuit, a first filter capacitor, a resistor component, a transient current suppression circuit and a voltage division circuit. The rectification circuit is connected w