MIC2594中文资料Negative Voltage Hot-Swap Controller数据手册Microchip规格书

描述 Description

The MIC2588 and the MIC2594 are single-channel, negative-voltage hot swap controllers designed to address the need for safe insertion and removal of circuit boards into \"live\" high-voltage system backplanes, while using very few external components. The MIC2588 and the MIC2594 are each available in an 8-pin SOIC package and work in conjunction with an external N-Channel MOSFET for which the gate drive is controlled to provide inrush current limiting and output voltage slew-rate control. Overcurrent fault protection is also provided and includes a programmable overcurrent threshold. During an output overload condition, a constant-current regulation loop is engaged to ensure that the system power supply maintains regulation. If a fault condition exceeds a built-in 400µs nuisance-trip delay, the MIC2588 and the MIC2594 will latch the circuit breaker's output off and will remain in the off state until reset by cycling either the UV/OFF pin or the power to the IC. A master Power-Good signal is provided to indicate that the output voltage of the soft-start circuit is within its valid output range. This signal can be used to enable one or more DC-DC converter modules.

特性 Features

·MIC2588: Pin-for-pin functional equivalent to the LT1640/LT1640A/LT4250
·Provides safe insertion and removal from live -48V (nominal) backplanes
·Operates from -19V to -80V
·Electronic circuit breaker function
·Built-in 400µs \"nuisance-trip\" delay (tFLT)
·Regulated maximum output current into faults
·Programmable inrush current limiting
·Fast response to short circuit conditions (< 1µs)
·Programmable undervoltage and overvoltage lockouts (MIC2588-xBM)
·Programmable UVLO hysteresis (MIC2594-xBM)
·Fault reporting: Active-HIGH (-1BM) and Active-LOW (-2BM) Power-Good output signal

简介

MIC2594属于集成电路（IC）的热插拔控制器。由制造生产的MIC2594热插拔控制器PMIC - 热插拔控制器是能提供电路内保护和控制功能的半导体，可允许带电情况下在电路中插入或拔除其他组件。热插拔控制器可用于计算机网络和通用电源系统，主要根据输出电流、受控通道数量等特性，以及自动重试、故障超时和保护等特殊功能进行区分。