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发明公开
CN104538417A 基于二极管链的LED开路保护集成芯片及其制造方法 有权

基于二极管链的LED开路保护集成芯片及其制造方法
摘要：
本发明公开了一种基于二极管链的LED开路保护集成芯片及其制造方法，所述基于二极管链的LED开路保护集成芯片包括由结构完全相同的若干个二极管正向串联而形成的正向二极管链，还包括一个与正向二极管链反向并联的反向并联二极管，正向二极管链的两端作为基于二极管链的LED开路保护集成芯片的正负极。当LED组正常工作时，芯片关断。当有LED开路时，芯片中正向串联的二极管链导通以保证与之串联的LED正常工作；当LED两端出现过高反向电压时，芯片中反向二极管导通泄放电流，防止LED灯烧毁。本发明的基于二极管链的LED开路保护集成芯片结构简单、性能稳定、成本低，能广泛应用于LED开路保护和芯片的ESD保护。
摘要（英）：

The invention discloses an LED open circuit protection integrated chip based on a diode chain and a manufacturing method of the LED open circuit protection integrated chip based on the diode chain. The LED open circuit protection integrated chip based on the diode chain comprises the forward diode chain formed by connecting multiple diodes in series in the forward direction, the diodes are completely identical in structure, the LED open circuit protection integrated chip further comprises a backward parallel diode connected with the forward diode chain in parallel in the backward direction, and the two ends of the forward diode chain serve as a positive electrode and a negative electrode of the LED open circuit protection integrated chip based on the diode chain. When an LED set normally works, the chip is turned off. When an LED open circuit exists, the diode chain connected in series in the forward direction in the chip is connected so as to guarantee that LEDs connected with the diode chain in series can normally work. When excessively high backward voltage occurs on the two ends of each LED, the backward diode in the chip is connected to discharge current, and an LED lamp is prevented from being burned out. The LED open circuit protection integrated chip based on the diode chain is simple in structure, stable in performance, low in cost and capable of being widely applied to LED open circuit protection and chip ESD protection.

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