CN-121984338-A - Integrated chip, circuit and lighting device

Abstract

The application provides an integrated chip, a circuit and a lighting device, and belongs to the technical field of lighting. The integrated chip is internally provided with an anti-surge component and a logic control circuit, the anti-surge component comprises a transient voltage suppression diode, the positive electrode of the transient voltage suppression diode is connected with a current sampling pin, and the negative electrode of the transient voltage suppression diode is connected with a drain electrode pin, so that the integrated chip has an anti-surge function, and a circuit or an electronic product using the integrated chip can bear voltage fluctuation. In addition, because the anti-surge component is directly arranged inside the integrated chip and packaged together with the component inside the integrated chip, compared with the circuit or electronic product with large volume caused by the arrangement of the anti-surge component outside the integrated chip, the highly integrated chip provided by the application can ensure that the circuit or electronic product has smaller volume and anti-surge protection.

Inventors

• SUN XIAOBING
• HAN JIANPING

Assignees

• 欧普照明股份有限公司
• 苏州欧普照明有限公司

Dates

Publication Date

20260505

Application Date

20210630

Claims (10)

1. 1. The integrated chip is characterized by being internally provided with an anti-surge component and a logic control circuit, wherein the integrated chip is provided with a first input pin, a second input pin, a current sampling pin and a drain electrode pin, the input end of the logic control circuit is connected with the first input pin and the second input pin and is used for receiving external power, the output end of the logic control circuit is connected with the current sampling pin and the drain electrode pin and is used for controlling driving current, the anti-surge component comprises a transient voltage suppression diode, and the positive electrode of the transient voltage suppression diode is connected with the current sampling pin and the negative electrode of the transient voltage suppression diode is connected with the drain electrode pin.
2. 2. The integrated chip of claim 1, wherein the anti-surge device further comprises at least one of a gas discharge tube and a varistor.
3. 3. The integrated chip of claim 2, wherein one end of the varistor is connected to the first input pin and the other end is connected to the second input pin.
4. 4. The integrated chip of claim 1, further comprising a rectifying unit coupled between the first input pin, the second input pin, and the input of the logic control circuit for rectifying the external power prior to entering the logic control circuit.
5. 5. The integrated chip of claim 4, wherein the rectifying unit comprises a rectifying first input terminal, a rectifying second input terminal, a rectifying first output terminal and a rectifying second output terminal, the rectifying first input terminal is connected to the first input pin, the rectifying second input terminal is connected to the second input pin, and the rectifying first output terminal and the rectifying second output terminal are connected to the input terminal of the logic control circuit.
6. 6. The integrated chip of claim 5, wherein the rectifying first output terminal and the rectifying second output terminal are connected to two ends of the anti-surge device, respectively, or The rectification first input end and the rectification second input end are respectively connected with two ends of the anti-surge component.
7. 7. The integrated chip of claim 1, further comprising a bus pin and a ground pin, wherein the input of the logic control circuit comprises a power supply terminal and an internal ground terminal, wherein the bus pin is connected to the power supply terminal, and wherein the ground pin is connected to the internal ground terminal.
8. 8. A circuit comprising an integrated chip as claimed in any one of claims 1-7, the circuit further comprising a storage inductance, a sampling resistor, a first filter capacitance and a second filter capacitance.
9. 9. The circuit of claim 8, wherein two ends of the sampling resistor are respectively connected with the current sampling pin and a grounding pin of the integrated chip, a positive electrode of the first filter capacitor is connected with a bus pin of the integrated chip, a negative electrode of the first filter capacitor is connected with the grounding pin, one end of the energy storage inductor is connected with the drain pin, a positive electrode of the second filter capacitor is connected with the bus pin, and a negative electrode of the second filter capacitor is connected with the other end of the energy storage inductor.
10. 10. A lighting device comprising a circuit as claimed in any one of claims 8-9.

Description

Integrated chip, circuit and lighting device The application is a divisional application based on the patent application with the application number 202110742072.3 and the application date 2021, 06 and 30, and the application name of integrated chip, circuit and lighting device. Technical Field The present invention relates to the field of lighting technologies, and in particular, to an integrated chip, a circuit, and a lighting device. Background In the application of electronic products, the problem of voltage fluctuation is often faced, so that the electronic products need to be protected from surge so as to solve the problem of voltage fluctuation in the application of the electronic products. For example, when designing a peripheral circuit of a driving power supply chip, an anti-surge device such as a varistor (MOV), a transient voltage suppression diode (TVS), a Gas Discharge Tube (GDT), or the like is generally used to be disposed on a dc side or an ac side of the periphery of the driving power supply chip, so as to realize anti-surge protection of the driving power supply module. However, as the electronic products pursue miniaturization of the size, the space of the electronic board is also smaller and smaller, and the arrangement of the anti-surge components obviously leads to the difficulty in achieving the purpose of miniaturization of the driving power module. Disclosure of Invention In order to solve the problem that the anti-surge component is arranged on the periphery of the driving power supply chip to cause the large size of the driving power supply module, the application provides an integrated chip, a circuit and a lighting device with the circuit. In a first aspect, the invention provides an integrated chip, wherein an anti-surge component and a logic control circuit are arranged in the integrated chip, the integrated chip is provided with a first input pin, a second input pin, a current sampling pin and a drain electrode pin, the input end of the logic control circuit is connected with the first input pin and the second input pin and is used for receiving external power, the output end of the logic control circuit is connected with the current sampling pin and the drain electrode pin and is used for controlling driving current, the anti-surge component comprises a transient voltage suppression diode, and the positive electrode of the transient voltage suppression diode is connected with the current sampling pin and the negative electrode of the transient voltage suppression diode is connected with the drain electrode pin. In an alternative embodiment, the anti-surge component further comprises at least one of a gas discharge tube and a piezoresistor. In an alternative embodiment, one end of the varistor is connected to the first input pin and the other end is connected to the second input pin. In an alternative implementation, the integrated chip is further built with a rectifying unit, and the rectifying unit is connected between the first input pin, the second input pin and the input end of the logic control circuit, and is used for rectifying the external power before entering the logic control circuit. In an alternative implementation mode, the rectification unit comprises a rectification first input end, a rectification second input end, a rectification first output end and a rectification second output end, wherein the rectification first input end is connected with the first input pin, the rectification second input end is connected with the second input pin, and the rectification first output end and the rectification second output end are connected with the input end of the logic control circuit. In an alternative implementation manner, the rectification first output end and the rectification second output end are respectively connected with two ends of the anti-surge component, or the rectification first input end and the rectification second input end are respectively connected with two ends of the anti-surge component. In an alternative implementation mode, the integrated chip further comprises a bus pin and a grounding pin, wherein the input end of the logic control circuit comprises a power end and an internal grounding end, the bus pin is connected with the power end, and the grounding pin is connected with the internal grounding end. In an alternative implementation manner, the integrated chip is further internally provided with a freewheel diode, the positive electrode of the freewheel diode is connected with the drain electrode pin, and the negative electrode of the freewheel diode is connected with the power supply end. In an alternative embodiment, two ends of the anti-surge component are respectively connected to the current sampling pin and the drain pin. In a second aspect, the present invention provides a circuit comprising an integrated chip as claimed in any one of the preceding claims, the circuit further comprising a tank inductance, a sampling resistor, a