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基于LTC4280设计的热插拔控制技术

• LTC4280是带I2C兼容监视的热插拔控制器,从而允许板能安全插入和拔出带电的背板. LTC4280的I2C接口和板上8位ADC能监视负载电流,电压和故障状态.工作电压从2.9V到15V,可调过流滤波器时间,具有用于外接N-MOSFET的高边驱动,输入过压/欠压保护,主要用于带电板的插入,电路断路器,计算机和服务器以及平台管理.本文介绍LTC4280主要特性, 方框图, 带5A断路器的12V应用电路以及在背板中的典型应用电路.
  
  LTC4280: Hot Swap Controller with I2C Compatible Monitoring
  
  The LTC4280 Hot Swap™ controller allows a board to be safely inserted and removed from a live backpla电感器生产厂家ne. Using an external N-channel pass transistor, board supply voltage
  and inrush current are ramped up at an adjustable rate. An I2C interface and onboard ADC allow for monitoring of load current, voltage and fault status.
  
  The device features adjustable analog foldback current limit and a FILTER pin which confi gures the time spent in overcurrent before declaring a fault. An I2C interface may confi gure the part to latch off or automatically restart after the LTC4280 detects a current limit fault.
  
  The controller has additional features to interrupt the host when a fault has occurred, notify when output power is good, detect insertion of a load card, and power-up either
  automatically upon insertion or wait for an I2C command to turn on.
  
  LTC4280主要特性:
  
  Allows Safe Insertion into Live Backplane
  
  8-Bit 输出电感器ADC Monitors Current and Voltage
  
  I2C/SMBus Interface
  
  Wide Operating 电感器生产Voltage Range: 2.9V to 15V
  
  Adjustable Overcurrent Filter Time
  
  High Side Drive for External N-Channel MOSFET
  
  No External Gate Capacitor Required
  
  Input Overvoltage/Undervoltage Protection
  
  Optional Latchoff or Auto-Retry After Faults
  
  Alerts H模压电感ost After Faults
  
  Inrush Current Limit with Foldback
  
  Available in 24-Pin 4mmx 5mm QFN Package
  
  LTC4280应用:
  
  Live Board Insertion
  
  Electronic Circuit Breakers
  
  Computers, Servers
  
  Platform Management
  
  图1.LTC4280方框图
  
  图2.带5A断路器的12V应用电路
  
  图3.LTC4280典型应用电路图
  
  图4.LTC4280 5V背板典型应用:插入激活接通和5A断路器

  基于Intersil的电源管理产品及低功耗设计 在现在化的便携式产品设计中，一方面我们需要更强的电源来应对产品更新带来的大电流需求，另一方面，工程师们还得注意满足其较高的便携性要求。这要求设计师们既要注意产品电源通路上的转换效率，设计出非常合理的

  汽车新电气系统双电压方案简介在新的汽车电气系统中，有两种实施方案，一种是全车42V单电压方案，另一种是14V/42V双电压方案。前者会对目前汽车零配件制造行业产生重大冲击，后者则冲击较小，过渡平缓。因此汽车工业界倾向于双电压方案

  这个极性反转电路能用吗?本帖最后由弱肉强食于2016-2-2614:38编辑
  最近开发电路要用到极性反转电路,1A电流,网上找到一个电路不知道能不能用有点担心,有谁用过这个电路吗?可靠不?
  
  电流不大可以考虑

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