High-voltage COB lamp strip

Abstract

The utility model provides a high-voltage COB lamp strip, which comprises a fuse F1, a discharge tube D1, a piezoresistor VR1, a piezoresistor VR2, a winding safety resistor RF1, a winding safety resistor RF2, a rectifier bridge DB1, a divider resistor R1, an LED lamp string, a constant-current chip U1 and a constant-current chip U2, a pin 2 of the rectifier bridge DB1 is connected with a mains supply zero line, one end of the fuse F1 is connected with a mains supply live line, the other end of the fuse F1 is connected with an LED lamp string, and the other end of the fuse U2 is connected with an LED lamp string. And the other end of the fuse F1 is respectively connected with one end of the discharge tube D1 and one end of the winding safety resistor RF1. The LED lamp strip has the beneficial effects that the impact of surge current on the LED chip is reduced through the secondary anti-surge circuit, the service life and the service cycle of the LED lamp strip are prolonged, and the installation and maintenance cost of the product is reduced.

Description

Technical Field

[0001] The utility model relates to a lighting device, in particular to a high-voltage COB light strip. Background Art

[0002] Existing high-voltage COB light strips are easily broken down by surges because the LED flip-chip has a relatively low voltage resistance, which reduces the product life and shortens the service life, resulting in increased installation and maintenance costs for workers. Summary of the Invention

[0003] In order to solve the problems in the prior art, the utility model provides a high-voltage COB light strip.

[0004] The utility model provides a high-voltage COB light strip, including a fuse F1, a discharge tube D1, a varistor VR1, a varistor VR2, a winding fuse resistor RF1, a winding fuse resistor RF2, a rectifier bridge DB1, a voltage divider resistor R1, an LED light string, a constant current chip U1 and a constant current chip U2, wherein the pin 2 of the rectifier bridge DB1 is connected to the mains neutral line, one end of the fuse F1 is connected to the mains live line, the other end of the fuse F1 is respectively connected to one end of the discharge tube D1 and one end of the winding fuse resistor RF1, the other end of the winding fuse resistor RF1 is connected to the pin 4 of the rectifier bridge DB1, the winding fuse resistor RF2 is connected in parallel with the winding fuse resistor RF1, and the other end of the discharge tube D1 is connected to the varistor. One end of the resistor VR1 is connected, the varistor VR1 is connected to pin 2 of the rectifier bridge DB1, one end of the varistor VR2 is connected to pin 4 of the rectifier bridge DB1, the other end of the varistor VR2 is connected to pin 2 of the rectifier bridge DB1, pin 3 of the rectifier bridge DB1 is connected to one end of the voltage dividing resistor R1, the other end of the voltage dividing resistor R1 is connected to the anode of the LED light string, the cathode of the LED light string is respectively connected to pin 2 of the constant current chip U1 and pin 2 of the constant current chip U2, pin 1 of the rectifier bridge DB1 is respectively connected to pin 1 and pin 3 of the constant current chip U1, and pin 1 of the rectifier bridge DB1 is respectively connected to pin 1 and pin 3 of the constant current chip U2.

[0005] As a further improvement of the present invention, the high-voltage COB light strip also includes a sampling resistor R2 and a sampling resistor R3, one end of the sampling resistor R2 is connected to pin 1 of the rectifier bridge DB1, and the other end of the sampling resistor R2 is connected to pin 1 of the constant current chip U1, one end of the sampling resistor R3 is connected to pin 1 of the rectifier bridge DB1, and the other end of the sampling resistor R3 is connected to pin 1 of the constant current chip U2.

[0006] The beneficial effect of the utility model is that a secondary surge protection circuit is formed by the discharge tube D1, the varistor VR1, the varistor VR2, the wire-wound fuse RF1 and the wire-wound fuse RF2. When a surge voltage comes, due to the presence of the wire-wound fuse RF1 and the wire-wound fuse RF2, the surge current is forced to first pass through the discharge tube D1 and the varistor VR1, and then flow through the wire-wound fuse RF1 and the wire-wound fuse RF2. Then, the varistor VR2 performs secondary absorption to ensure that the surge current does not remain in the LED chip circuit, thereby ensuring the long life of the LED light strip. The secondary surge protection circuit reduces the impact of the surge current on the LED chip, thereby increasing the life and service cycle of the LED light strip, and reducing the installation and maintenance costs of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other solutions can be obtained based on these drawings without paying any creative work.

[0008] Figure 1 This is a circuit diagram of a high-voltage COB light strip in the utility model. DETAILED DESCRIPTION

[0009] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0010] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0011] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0012] The present invention will be further described below with reference to the accompanying drawings and specific implementation methods.

[0013] like Figure 1 As shown, a high-voltage COB light strip includes a fuse F1, a discharge tube D1, a varistor VR1, a varistor VR2, a winding fuse resistor RF1, a winding fuse resistor RF2, a rectifier bridge DB1, a voltage divider resistor R1, an LED light string, a constant current chip U1 and a constant current chip U2, wherein pin 2 of the rectifier bridge DB1 is connected to the mains neutral line, one end of the fuse F1 is connected to the mains live line, the other end of the fuse F1 is respectively connected to one end of the discharge tube D1 and one end of the winding fuse resistor RF1, the other end of the winding fuse resistor RF1 is connected to pin 4 of the rectifier bridge DB1, the winding fuse resistor RF2 is connected in parallel with the winding fuse resistor RF1, and the other end of the discharge tube D1 is connected to the varistor One end of VR1 is connected, the varistor VR1 is connected to pin 2 of the rectifier bridge DB1, one end of the varistor VR2 is connected to pin 4 of the rectifier bridge DB1, the other end of the varistor VR2 is connected to pin 2 of the rectifier bridge DB1, pin 3 of the rectifier bridge DB1 is connected to one end of the voltage dividing resistor R1, the other end of the voltage dividing resistor R1 is connected to the anode of the LED light string, the cathode of the LED light string is respectively connected to pin 2 of the constant current chip U1 and pin 2 of the constant current chip U2, pin 1 of the rectifier bridge DB1 is respectively connected to pin 1 and pin 3 of the constant current chip U1, and pin 1 of the rectifier bridge DB1 is respectively connected to pin 1 and pin 3 of the constant current chip U2.

[0014] The LED light string includes a plurality of LED chips LED1-LEDn connected in series.

[0015] The high-voltage COB light strip also includes a sampling resistor R2 and a sampling resistor R3. One end of the sampling resistor R2 is connected to pin 1 of the rectifier bridge DB1, and the other end of the sampling resistor R2 is connected to pin 1 of the constant current chip U1. One end of the sampling resistor R3 is connected to pin 1 of the rectifier bridge DB1, and the other end of the sampling resistor R3 is connected to pin 1 of the constant current chip U2.

[0016] Connect fuse F1 to the mains live line. Fuse F1 primarily provides overload protection. If the fuse is correctly placed in the circuit, it will melt when the current rises abnormally high enough and reaches a certain temperature, shutting off the current and ensuring safe circuit operation.

[0017] The discharge tube D1 is an important electronic component widely used to protect equipment from surge current or overvoltage. DC breakdown voltage (Vsdc). This is the breakdown voltage of the discharge tube at a specific voltage change rate (such as 100V / s), also known as the "DC ignition voltage." Common DC breakdown voltage values ​​include 90V, 150V, 230V, 350V, 470V, 600V, and 800V, with a maximum of 3000V and a minimum of 70V. Pulse (impact) breakdown voltage (Vsi). This is the breakdown voltage when a pulse voltage at a specific rate is applied to the discharge tube. Due to its slower reaction speed, the pulse breakdown voltage is usually higher than the DC breakdown voltage. Impulse withstand current refers to the maximum pulse current of a specified waveform and number that the discharge tube can withstand without affecting its DC discharge voltage and insulation resistance. Power frequency withstand current refers to the power frequency current that the discharge tube can withstand at a specified number of times without affecting its DC discharge voltage and insulation resistance. Insulation resistance (IR). The resistance of a discharge tube measured at a specified voltage is typically very large (e.g., over 1 GΩ). Capacitance (C): The capacitance between the two electrodes of a discharge tube measured at a frequency of 1 MHz is typically very small (e.g., less than 10 pF). Response time, which refers to the time from when the applied voltage exceeds the breakdown voltage to when breakdown occurs, is typically measured in microseconds for gas discharge tubes. Power handling, which refers to the maximum energy a gas discharge tube can withstand and dissipate, is typically defined under a fixed 8×20 μs current waveform. Temperature range: The operating temperature range of a gas discharge tube is generally between -55°C and +125°C. Turn-on current, turn-off current, and holding current: These parameters are specific to semiconductor discharge tubes and relate to the trigger current and the minimum current required to maintain the on state. Discharge tubes also have other characteristics, such as capacitance less than 1 pF, sensitive response, fast absorption rate, residual voltage close to their DC breakover voltage, fast operation speed, small size, low price, and long pulse life.

[0018] Varistors VR1 and VR2 are voltage-limiting protection devices. Utilizing the nonlinear characteristics of varistors, when an overvoltage occurs between the two electrodes of the varistors, the varistors can clamp the voltage to a relatively fixed value, thereby protecting the subsequent circuits.

[0019] Wirewound resistors RF1 and RF2 function as ordinary resistors, providing functions such as voltage reduction, current shunting, load handling, feedback, energy conversion, and matching. In the event of circuit anomalies, such as excessive current or overvoltage, wirewound resistors can disconnect the circuit within a specified time, thereby protecting other components from damage. They typically have a fast response time, capable of quickly melting in the event of surges or other abnormal current conditions, disconnecting the circuit and preventing equipment damage. Furthermore, wirewound resistors offer excellent surge resistance and heat dissipation, enabling them to quickly activate in the event of a circuit malfunction. Compared to other types of resistors, such as film-type resistors, they are more resistant to surge voltages and less prone to false melting.

[0020] The voltage divider resistor R1 is connected in series with the LED chips LED1---LEDn.

[0021] Constant current chip U1 and constant current chip U2 use CYT16D. CYT16D is a linear constant current IC with adjustable output current, high constant current precision, simple application solution, low cost, over-temperature protection function, safer and more reliable. The chip OUT port has a voltage resistance of 500V.

[0022] A secondary surge protection circuit is formed by the discharge tube D1, varistor VR1, varistor VR2, wire-wound fuse RF1 and wire-wound fuse RF2. When a surge voltage comes, the wire-wound fuse RF1 and RF2 provide impedance, forcing the surge current to first pass through the discharge tube D1 and varistor VR1, then flow through the wire-wound fuse RF1 and RF2, and then pass through the varistor VR2 for secondary absorption to ensure that the surge current does not remain in the LED chip circuit, thereby ensuring the long life of the LED light strip.

[0023] The utility model provides a high-voltage COB light strip, which reduces the impact of surge current on LED chips through a secondary surge protection circuit, thereby increasing the life and service life of the LED light strip and reducing the installation and maintenance costs of the product.

[0024] The utility model provides a high-voltage COB light strip, which is a high-voltage COB light strip that passes a 2.5KV ringing wave.

[0025] Ringing waves simulate the instantaneous impact energy generated by power grid and load switching, power circuit failure or lightning strike, and are widely present in power supply networks as well as control and signal lines.

[0026] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A high voltage COB light strip, characterized by: The invention comprises a fuse F1, a discharge tube D1, a varistor VR1, a varistor VR2, a winding insurance resistor RF1, a winding insurance resistor RF2, a rectifier bridge DB1, a voltage dividing resistor R1, an LED light string, a constant current chip U1 and a constant current chip U2, wherein the pin 2 of the rectifier bridge DB1 is connected to the mains neutral line, one end of the fuse F1 is connected to the mains live line, the other end of the fuse F1 is respectively connected to one end of the discharge tube D1 and one end of the winding insurance resistor RF1, the other end of the winding insurance resistor RF1 is connected to the pin 4 of the rectifier bridge DB1, the winding insurance resistor RF2 is connected in parallel with the winding insurance resistor RF1, the other end of the discharge tube D1 is connected to one end of the varistor VR1 The varistor VR1 is connected to pin 2 of the rectifier bridge DB1, one end of the varistor VR2 is connected to pin 4 of the rectifier bridge DB1, the other end of the varistor VR2 is connected to pin 2 of the rectifier bridge DB1, pin 3 of the rectifier bridge DB1 is connected to one end of the voltage-dividing resistor R1, the other end of the voltage-dividing resistor R1 is connected to the anode of the LED light string, the cathode of the LED light string is respectively connected to pin 2 of the constant current chip U1 and pin 2 of the constant current chip U2, pin 1 of the rectifier bridge DB1 is respectively connected to pin 1 and pin 3 of the constant current chip U1, and pin 1 of the rectifier bridge DB1 is respectively connected to pin 1 and pin 3 of the constant current chip U2.

2. The high voltage COB light strip according to claim 1, characterized in that: The high-voltage COB light strip also includes a sampling resistor R2 and a sampling resistor R3, one end of the sampling resistor R2 is connected to pin 1 of the rectifier bridge DB1, and the other end of the sampling resistor R2 is connected to pin 1 of the constant current chip U1, one end of the sampling resistor R3 is connected to pin 1 of the rectifier bridge DB1, and the other end of the sampling resistor R3 is connected to pin 1 of the constant current chip U2.

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