High-voltage driving circuit
A high-voltage driving circuit and voltage-stabilizing circuit technology, applied in electric light sources, electrical components, electroluminescent light sources, etc., can solve the problems of uneven quality of components, reduce circuit reliability, and prone to failures, so as to reduce circuit failures. rate, reduce the number, and prolong the service life
Active Publication Date: 2016-11-23
江苏万邦微电子有限公司
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Problems solved by technology
[0003] However, LED light tubes also need to be equipped with a driving circuit. Due to the complex structure of the existing LED driving circuit, there are many design components, and the quality of these components is uneven, which is prone to failure and reduces the reliability of the long-term operation of the circuit.
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[0012] Such as Figure 1-2 As shown, the present invention includes a low-voltage DC power supply, a boost conversion circuit, a bridge rectifier circuit and a voltage stabilizing circuit that are electrically connected in sequence; the input end of the low-voltage DC power supply is connected to an external AC mains, and the output end is connected to a boost conversion circuit. circuit; the boost conversion circuit includes a boost converter chip, an input capacitor Cin, a filter capacitor Cout, an inductor L1, a diode, a voltage dividing resistor R1, a voltage dividing resistor R2 and a load resistor R; the boost converter chip The vin pins are respectively connected to the positive pole of the input capacitor Cin and one end of the inductor L1, and the other end of the inductor L1 is respectively connected to the sw pin of the boost converter chip and the positive pole of the diode, and the negative pole of the diode is respectively connected to one end of the voltage divid...
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The invention discloses a high-voltage driving circuit which comprises a low-voltage direct current power source, a boosting conversion circuit, a rectification circuit and a voltage stabilizing circuit which are sequentially and electrically connected. The input end of the low-voltage direct current power source is connected with external alternating current electric supply, and the output end of the low-voltage direct current power source is connected with a boosting conversion circuit. The input end of the boosting conversion circuit is connected with the output end of the voltage stabilizing circuit, and the output end of the boosting conversion circuit is connected with the input end of the rectification circuit. The output end of the rectification circuit is connected with the input end of the voltage stabilizing circuit. The output end of the voltage stabilizing circuit is connected with an LED lamp set to be driven. The circuit is simple, wide in application range and high in reliability.
Description
technical field [0001] The invention belongs to a high-voltage drive circuit. Background technique [0002] LED is called the fourth-generation lighting source or green light source. It has the characteristics of energy saving, environmental protection, long life, and small size. It is widely used in various indications, displays, decorations, backlights, general lighting, and urban night scenes. According to different functions, it can be divided into five categories: information display, signal lights, vehicle lamps, LCD backlight, and general lighting. [0003] However, LED tubes also need to be equipped with a driving circuit. Due to the complex structure of the existing LED driving circuit, there are many design components, and the quality of these components is uneven, which is prone to failure and reduces the reliability of the long-term operation of the circuit. Therefore, even if the LED lamp itself can achieve a life span of 50,000 to 100,000 hours or even longer,...
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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/37
Inventor 窦延军张林张春秋
Owner 江苏万邦微电子有限公司