产品概述
描述
The STEF512SRI is an integrated dual electronic fuse, designed to protect circuitry on the output from overcurrent and overvoltage events, in those applications requiring hot swap operation and in-rush current control.
The device embeds two electronic fuses, one for the 5 V rail and one for the 12 V rail. Thanks to the very low ON-resistance of the integrated power MOSFETs, the voltage drop from the main supply to the load is very low during normal operation.
The 5 V channel provides a reverse blocking feature, preventing current flow to the input in case of brown-out or shutdown.
Startup time is internally controlled by a dedicated slew-rate circuit. In this way the inrush current at startup can be kept under control.
The maximum load current is precisely limited, by utilizing a sense FET topology, to factory-defined values.
The device also provides precise overvoltage clamp for each channel, preventing the load from being damaged by power supply failures, and Under Voltage Lockout (UVLO), assuring that the input voltage is above the minimum operating threshold before the power device is turned on.
When an overload condition occurs, the STEF512SRI limits the output current to the predefined safe value. If the anomalous overload condition persists, the device goes into thermal shutdown, the internal switch opens, and the load disconnected from the power supply. Load current on each channel can be precisely monitored by reading the signal on the IMON_5/12 pin.
The device features a SATA– Ignore pin, that can be used to simplify compatibility among SAS/SATA interfaces.
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所有功能
- 5 V and 12 V channels into one chip
- 23.5 V absolute maximum input voltage
- Precise output overvoltage clamp
- Fixed overcurrent protection for both channels
- Reverse current protection on 5 V channel
- Current monitor output in a single pin for both rails
- Current monitor pin selection
- Thermal protection
- Auto-retry after fault
- Input undervoltage lockout
- Integrated 45 mΩ power MOSFETs
- SAS disable pin
- SATA ignore function
- DFN10 ( 2x3 mm) package
EDA符号、封装和3D模型
STMicroelectronics - STEF512SRI
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符号
封装
3D模型
质量与可靠性
| 产品型号 | Marketing Status | 封装 | 等级规格 | 符合RoHS级别 | 材料声明** |
|---|---|---|---|---|---|
| STEF512SRIPUR | 批量生产 | WFDFPN 2X3 10L COL | 工业 | Ecopack2 | |
STEF512SRIPUR
Package:
WFDFPN 2X3 10L COLMaterial Declaration**:
(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系 销售支持。
样片和购买
| 产品型号 | Order from distributors | 从ST订购 | 供货状态 | ECCN (US) | ECCN (EU) | 包装类型 | 封装 | 温度（ºC） | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||
| STEF512SRIPUR | distributors 无法联系到经销商，请联系我们的销售办事处 | 批量生产 | EAR99 | NEC | Tape and Reel | WFDFPN 2X3 10L COL | -40 | 125 | CHINA | | ||