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本文介绍了一个简单、具有快速响应能力的过流故障检测器,用于低压系统的电路保护。该方案与专用的热插拔控制器不同,热插拔控制器利用欠压检测产生较长的启动延时,本文所介绍的电路在输入电压上升到2.7V以上150μs后才提供保护。当然,在上电过程中,该电路会通过限制外部P沟道
This article describes a simple, fast-responding, overcurrent fault detector for circuit protection in low-voltage systems. This scheme is different from a dedicated hot-swap controller. The hot-swap controller uses a brown-out detection to generate a long start-up delay. The circuit described in this article provides protection after the input voltage has risen above 2.7V for 150μs. Of course, during power-up, the circuit will pass external P-channel restrictions