金兴 一种原边电流取样以实现过载保护的LED驱动电源——2020神灯奖申报技术

项目名称：  金兴 一种原边电流取样以实现过载保护的LED驱动电源

Tauras An LED Driver for Overload Protection by Sampling Primary Current

申报单位：  珠海市金兴科技有限公司

综合介绍或申报理由：

一种原边电流取样以实现过载保护的LED驱动电源，包括连接外部电源的原边驱动模块、与原边驱动模块配合产生输出电流的副边驱动模块以及主控模块：还包括过载检测电路，过载检测电路与原边驱动模块电性连接以根据原边电流的大小控制原边驱动模块运作，本设计对原边侧的原边电流进行检测，原边侧的原边电流较小，配合检测电路损耗较小，过载保护精准并且电路简单。

An LED driving power supply for overload protection by sampling the primary current includes the primary driving module connecting the external power supply, the secondary driving module cooperating with the primary driving module to generate the output current, and the main control module. The overload detection circuit is also included. The overload detection circuit is electrically connected with the primary driving module to control the operation of the primary driving module according to the size of the primary current. The design detects the primary current of the original side. The primary current of the original side is small, the loss of the detection circuit is small, the overload protection is precise and the circuit is simple.

主要技术参数：

一种原边电流取样以实现过载保护的LED驱动电源，包括连接外部电源的原边驱动模块、与原边驱动模块配合产生输出电流的副边驱动模块以及主控模块；还包括过载检测电路，过载检测电路与原边驱动模块电性连接以检测原边驱动模块的原边电流，主控模块与原边驱动模块电性连接以根据原边电流的大小控制原边驱动模块运作。

所述原边驱动模块包括第一开关管、第二开关管、电容ECI、电容EC2、原边线圈，第一开关管包括控制端、输入端和输出端，第二开关管包括控制端、输入端和输出端；

An LED driving power supply for overload protection by sampling the primary current includes the primary drive module connected with the external power supply, the secondary drive module and the main control module which cooperate with the primary drive module to generate the output current, and the overload detection circuit, which is electrically connected with the primary drive module to detect the primary current of the primary drive module, the main control module and the primary drive module. The drive module is electrically connected to control the operation of the primary drive module according to the size of the primary current.

The primary driving module includes the first switch, the second switch, the capacitor ECI, the capacitor EC2 and the primary coil. The first switch includes the control end, the input end and the output end, and the second switch includes the control end, the input end and the output end.

技术及工艺创新要点：

过载检测电路与原边驱动模块连接以检测原边侧的原边电流，并且通过比较将信号发送到主控模块，主控模块根据原边电流的大小调制相应的PWM信号控制原边驱动模块运作，本设计对原边侧的原边电流进行检测，原边侧的原边电流较小，配合检测电路损耗较小，过载保护精准并且电路简单。

在过载检测电路中，增加峰值保持模块，从而使取得的电压值在高、低压输入时非常接近且相当平稳，使得更加检测结果更加精准。

The overload detection circuit is connected with the original side drive module to detect the original side current, and the signal is sent to the main control module through comparison. The main control module modulates the corresponding PWM signal according to the size of the original side current to control the operation of the original side drive module. This design detects the original side current of the original side. The original side current of the original side is small, and the loss of the cooperation detection circuit is small. The load protection is precise and the circuit is simple.

In the overload detection circuit, the peak holding module is added, so that the voltage value obtained is very close and quite stable at high and low voltage input, which makes the detection result more accurate.

实际运用案例和用户评价意见：

本实用新型涉及LED驱动电源，特别是对称半桥的LED驱动电源。The utility model relates to an LED driving power supply, in particular to a symmetrical half-bridge LED driving power supply.

获奖、专利情况：

实用新型专利号：ZL 2018 2 0338913.8

Patent No. ZL 2018 2 0338913.8

申报单位介绍：

珠海金兴科技有限公司，成立于1998年，现有500多名经验丰富，勇于奉献的生产员工。金兴，专注于LED开关电源的研发和生产，完善的产品线包括但不限于防水系列，防雨系列和室内商照电源系列。

公司获得了ISO9001:2008质量管理体系标准认证，并经TUV 和SGS审厂通过。产品取得了CE、CCC、GS、TUV、UL、CUL、EMC、SAA、IP67、IP68、RoHS 等多项认证。

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