尽量减少短路电流脉冲的热插拔控制器

摘要：由于内部断路器延迟和有限的MOS栅极下拉电流，许多热插拔控制器不限制在第一个10μs到50μs的电流后，输出短路。结果可以是一个简短的几百安培流动。一个简单的外部电路计数器这个问题，最大限度地减少初始电流尖峰和终止内为200ns至500ns短路。

Maxim > App Notes > AMPLIFIER AND COMPARATOR CIRCUITS CIRCUIT PROTECTION
HOT-SWAP AND POWER SWITCHING CIRCUITS

Keywords: hot-swap controllers, inrush current, circuit protection, short-circuit current Aug 27, 2004

APPLICATION NOTE 3328
Minimize Short-Circuit Current Pulse in Hot-Swap Controller

Abstract: Because of internal circuit-breaker delay and limited MOS-gate pulldown current, many hot-swap
controllers do not limit current during the first 10s to 50s following a shorted output. The result can be a
brief flow of several hundred amperes. A simple external circuit counters this problem by minimizing the initial
current spike and terminating the short circuit within 200ns to 500ns.


A typical +12V, 6A, hot-swap controller circuit (Figure 1) contains (like