产品概述
描述
The STEF512SRX 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 inrush 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.
The start-up 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 being damaged from power supply failures, and undervoltage lockout (UVLO), assuring that the input voltage is above the minimum operating threshold, before the power is turned on.
When an overload condition occurs, the STEF512SRX limits the output current to the predefined safe value. If the anomalous overload condition persists, the device goes into thermal shutdown, the internal switch is opened and the load is disconnected from the power supply.
Load current on each channel can be accurately monitored by reading the signal on the IMON_5/12 pin.
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所有功能
- 5 V and 12 V channels into one chip
- 25 V absolute maximum input voltage
- Precise output overvoltage clamp
- Fixed overcurrent protection for both channels
- Reverse current protection on 5 V channel
- Thermal protection
- Available in auto-retry version
- Input undervoltage lockout
- Adjustable output voltage slew rate
- Integrated 45 mΩ power MOSFETs
- SAS disable pin
- Current monitor pin selection
- Current monitor output in a single pin for both rails
- DFN10 (2 x 3 mm) package
EDA符号、封装和3D模型
STMicroelectronics - STEF512SRX
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符号
封装
3D模型
样片和购买
| 产品型号 | 供货状态 | Budgetary Price (US$)*/Qty | 从ST订购 | Order from distributors | 封装 | 包装类型 | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | 温度（ºC） | Operating Temperature (°C) (min) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||||
| STEF512SRXCPUR | | | distributors 无法联系到经销商，请联系我们的销售办事处 | WFDFPN 2X3 10L COL | Tape and Reel | CHINA | EAR99 | NEC | -40 | 125 | -40 | |||
STEF512SRXCPUR 批量生产