MAX4271, MAX4272, MAX4273 3V至1

MAX4271, MAX4272, MAX4273 3V至12V、限流型、热插拔控制器

概述

The MAX4271/MAX4272/MAX4273 comprise a complete family of integrated 3V to 12V hot-swap controllers. They allow the safe insertion and removal of circuit cards into live backplanes.

The discharged filter capacitors of the circuit card provide a low impedance to the live backplane. High in-rush currents from the backplane to the circuit card can burn up connectors and components, or momentarily collapse the backplane power supply leading to a system reset. This family of hot-swap controllers prevents such problems by regulating the current to a preset limit when the board is plugged in, allowing the system to stabilize safely. After the startup cycle is completed, two on-chip comparators provide DualSpeed/BiLevel™ protection against short circuits, load glitches, and overcurrent conditions. In the event of a fault condition, the load is disconnected. Fault recovery is handled by unlatching (MAX4271), autoretry (MAX4272), or programmed (MAX4273) methods.

The MAX4271 family includes many integrated features that reduce component count and design time. An on-board charge pump provides the gate drive for a low-cost, external n-FET. Integrated features like startup current regulation and current glitch protection eliminate external timing resistors and capacitors. Also featured are an open-drain status output to indicate a fault condition, and an adjustable overcurrent response time.

The MAX4271 (latched fault protection) and MAX4272 (autoretry fault protection) come in 8-pin SO packages. The MAX4273 (full function) comes in the space-saving 16-pin QSOP package and 16-pin SO package. All parts are specified across the extended temperature range, and have an absolute maximum rating of 15V to provide extra protection against inductive kickback during board removal.

关键特性

Provide Safe Hot Swap for +3V to +12V Power Supplies with Few External Components

Unique Current Regulation Architecture Minimizes n-FET Linear Mode Duration

Autoretry Feature (MAX4272/MAX4273)

DualSpeed/BiLevel Current Limit Protects Against Current Glitches and Short Circuits

Power-On RESET (MAX4273)

15V Absolute Maximum Rating Protects Against Inductive Kickbacks During Board Removal

Internal Charge Pump Generates Gate Drive for External n-MOSFET

Status Output Pin Indicates Fault/Safe Condition

Space-Saving 8-Pin SO, 16-Pin QSOP Packages

应用/使用

 PBX
 RAID
 路由器/交换机
 路由器/交换机
 电信
 无线基站

典型工作电路

限流热插拔控制器swapcontrollers

免责声明：本网信息来自于互联网，目的在于传递更多信息，并不代表本网赞同其观点。其原创性以及文中陈述文字和内容未经本站证实，对本文以及其中全部或者部分内容、文字的真实性、完整性、及时性本站不作任何保证或承诺，并请自行核实相关内容。本站不承担此类作品侵权行为的直接责任及连带责任。如若本网有任何内容侵犯您的权益，请及时联系我们，本站将会在24小时内处理完毕。