Texas Instruments TPS2475x 12A电子熔丝(eFuse)电路保护器
Texas Instruments TPS2475x 为2.5V至18V应用提供高度集成的负载保护。此器件在一个针对小外形尺寸应用的小型封装内集成了一个热插拔控制器和一个功率 MOSFET。这些器件保护电源、负载和内部 MOSFET 不受潜在损害事件的影响。在启动过程中，负载电流与 MOSFET 功率耗散被限制在用户选定值内。在启动之后，将允许超过用户选定限值的电流流动，直至设定的超时为止， –负载与电源直接断开的极端过载情况除外。可编程 FET SOA 保护确保内部 MOSFET 始终在其安全运行区域 (SOA) 内运行，并且负载以一个已定义的斜升速率启动。这在提升系统稳定性的同时增加了内部 MOSFET 性能。针对系统状态监视以及下游负载控制提供电源正常、故障和电流监视输出。此器件采用 36 引脚，3.5mm×7mm，四方扁平无引线 (QFN)(RUV) 封装，并且在–40℃至 125℃的工作结温范围内完全额定运行。
During startup, load current and MOSFET power dissipation are limited to user-selected values. After startup, currents above the user-selected limit will be allowed to flow until programmed timeout – except in extreme overload events when load is immediately disconnected from source.
Programmable FET SOA protection ensures the internal MOSFET operates within its safe operating area (SOA) at all times and the load starts up at a defined ramp rate. This enhances the internal MOSFET performance while improving system reliability. Power good, Fault, and current monitor outputs are provided for system status monitoring and downstream load control.
The devices are available in a 36-pin, 3.5 mm × 7 mm, QFN (RUV) package and fully specified over the –40°C to 125°C operating junction temperature.
特性
- 2.5V to 18V Bus Operation
- Continuous Current up to 12A
- Integrated MOSFET with RDS(on) of 3mΩ (Typ)
- Programmable Current Limit
- Programmable FET SOA Protection
- High ILimit Accuracy from 10mA to 12A
- Programmable Fault Timer
- Fast Breaker for Short-Circuit Protection
- Programmable VOUT Slew Rate, UV and OV
- Power-Good and Fault Outputs
- Analog Load Current Monitor
应用
- Server
- High Current Load Switch
- Communications Equipment
- Plug-In Modules
- RAID Systems
- Base Stations
- Fan Control
Block Diagram
