基于LT4356的本质安全型电源保护模块设计

基金项目:

天地(常州)自动化股份有限公司研发项目（12SY020）

详细信息

Design of protection module of intrinsic safety power supply based on LT4356

摘要: 针对目前本质安全型电源保护模块存在保护功能简单、转换效率低、抗干扰能力差、本质安全电流较小等问题，设计了一种基于LT4356浪涌抑制器的本质安全型电源保护模块；详细分析了该模块中软启动，过压、过流及电压跌落故障保护，保护锁定功能的实现原理。该模块实现输出电压DC5～18 V，输出本质安全电流850～1 000 mA，故障保护时间在2 μs以内，符合GB 3836.4—2010本质安全要求。
- 本质安全型电源 /
- 过流保护 /
- 过压保护 /
- 电压跌落保护 /
- LT4356
Abstract: In view of problems of simple protection function, low conversion efficiency, poor anti-interference ability and low intrinsic safety current existed in current protection module of intrinsic safety power supply, a protection module of intrinsic safety power supply based on surge suppressor LT4356 was designed. Function realization principle of the module was analyzed, including soft start, over-voltage, over-current and voltage sag protection, protection locking. The module with output voltage is DC5-18 V, the maximum current is 850-1 000 mA and fault protection time within 2 μs, which meets intrinsic safety requirements of GB 3836.4-2010.
- intrinsic safety power supply /
- over-current protection /
- over-voltage protection /
- voltage sag protection /
- LT4356