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

簡(jiǎn)介

MIC2594屬于集成電路（IC）的熱插拔控制器。由制造生產(chǎn)的MIC2594熱插拔控制器PMIC - 熱插拔控制器是能提供電路內(nèi)保護(hù)和控制功能的半導(dǎo)體，可允許帶電情況下在電路中插入或拔除其他組件。熱插拔控制器可用于計(jì)算機(jī)網(wǎng)絡(luò)和通用電源系統(tǒng)，主要根據(jù)輸出電流、受控通道數(shù)量等特性，以及自動(dòng)重試、故障超時(shí)和保護(hù)等特殊功能進(jìn)行區(qū)分。