ADM1172: 2.7 V to 16.5 V Hot Swap Controller with Power-Good Comparator
The ADM1172 is a Hot Swap controller that allows a board to be safely inserted and removed from a live backplane. This is achieved using a pass FET with a current control loop that monitors the input current using a sense resistor. An internal charge pump is used to enhance the gate of the external high side N-channel FET. When an over current condition is detected the gate voltage of the FET is reduced to limit the current flowing through the sense resistor. The ADM1172 operates with a supply voltage ranging from 2.7V to 16.5V. During an overcurrent condition the timer cap determines the amount of time the FET will remain in this condition. The ON (ON/CLR) pin is the enable input for the device and also acts as a latched fault reset for the ADM1172-2 model. The ADM1172 also features a power fail comparator. The voltage on the PFI pin is compared with an internal 0.6V reference and the output of this comparator is presented on the PFO pin.
This device is available in two options: the ADM1172-1 will automatic retry for over-current fault and the ADM1172-2 will latch-off for an over-current fault. The ADM1172 is packaged in an 8-lead TSOT package
产品应用领域 Applications
- Hot Swap Board Insertion – Line Cards, Raid systems
- Electronic Circuit Breaker
- Industrial High Side Switch/Circuit Breaker
ADM1172 特点
- Allows Safe Board Insertion and Removal from a Live Backplane
- Controls Supply Voltages from 2.7 V to 16.5V
- Power Fail Comparator
- Adjustable Analog Current Limit with Circuit Breaker
- Fast Response Limits Peak Fault Current
- Automatic Retry or Latch-Off On Current Fault
- Charge Pumped Gate Drive for External N-FET Switch
- Undervoltage Lockout
- 8-pin TSOT Package
ADM1172 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| ADM1172-1AUJZ-RL7 | 量产 | 8 ld TSOT | 8 | 工业 |
| ADM1172-2AUJZ-RL7 | 量产 | 8 ld TSOT | 8 | 工业 |
| EVAL-ADM1172EBZ | 量产 | 评估板 | - | 待定 |
ADM1172 应用技术支持与电子电路设计开发资源下载
- ADM1172 数据手册DataSheet 下载 . PDF
- ADI 模拟器件公司比较器产品选型指南 . PDF
- Analog Devices, Inc. 美国模拟器件公司产品订购手册 .PDF
- 热插拨及电源监控器广告( pdf, 306kb)
- 电源监控器与时序控制器. PDF