主页 电源管理 电源保护开关与控制器 电子保险丝(集成热插拔)

TPS25921A

正在供货

具有自动重试故障响应功能的 4.5V 至 18V、90mΩ、0.4A 至 1.6A 电子保险丝

产品详情

Vabsmax_cont (V) 20 Vin (max) (V) 18 Vin (min) (V) 4.5 Current limit (max) (A) 1.6 Current limit (min) (A) 0.4 Features Adjustable current limit, Adjustable soft start, Fault output, Overcurrent protection, Overvoltage protection, Short-circuit protection, Thermal shutdown UL recognition UL2367, UL60950 Overcurrent response Current limiting Fault response Auto-retry Ron (typ) (mΩ) 90 Overvoltage response Cut-off Rating Catalog Soft start Adjustable Quiescent current (Iq) (typ) (A) 0.00041 Quiescent current (Iq) (max) (A) 0.00058 Device type eFuses and hot swap controllers Operating temperature range (°C) -40 to 85
Vabsmax_cont (V) 20 Vin (max) (V) 18 Vin (min) (V) 4.5 Current limit (max) (A) 1.6 Current limit (min) (A) 0.4 Features Adjustable current limit, Adjustable soft start, Fault output, Overcurrent protection, Overvoltage protection, Short-circuit protection, Thermal shutdown UL recognition UL2367, UL60950 Overcurrent response Current limiting Fault response Auto-retry Ron (typ) (mΩ) 90 Overvoltage response Cut-off Rating Catalog Soft start Adjustable Quiescent current (Iq) (typ) (A) 0.00041 Quiescent current (Iq) (max) (A) 0.00058 Device type eFuses and hot swap controllers Operating temperature range (°C) -40 to 85
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • 4.5 V – 18 V Operating Voltage, 20 V (Max)
  • 90 mΩ RDS(ON) (Typical)
  • 0.4 A to 1.6 A Adjustable Current Limit
  • ±2% Accurate ILIMIT at 1A at 25°C
  • ±3% Overvoltage, Undervoltage Threshold
  • Programmable dVO/dt Control
  • Fault Output for Thermal Shutdown, UVLO and
    OVP
  • –40°C to 125°C Junction Temperature Range
  • Auto-Retry and Latch-Off Versions
  • UL2367 Recognized - File No. E169910
  • UL60950 - Safe during Single Point Failure Test
  • 4.5 V – 18 V Operating Voltage, 20 V (Max)
  • 90 mΩ RDS(ON) (Typical)
  • 0.4 A to 1.6 A Adjustable Current Limit
  • ±2% Accurate ILIMIT at 1A at 25°C
  • ±3% Overvoltage, Undervoltage Threshold
  • Programmable dVO/dt Control
  • Fault Output for Thermal Shutdown, UVLO and
    OVP
  • –40°C to 125°C Junction Temperature Range
  • Auto-Retry and Latch-Off Versions
  • UL2367 Recognized - File No. E169910
  • UL60950 - Safe during Single Point Failure Test

The TPS25921 is a compact, feature rich eFuse with a full suite of protection functions. The wide operating voltage allows control of many popular DC buses. The precise ±2% current limit, at room temperature, provides excellent accuracy making the TPS25921 well suited for many system protection applications.

Load, source and device protection are provided with multiple programmable features including overcurrent, overvoltage and undervoltage. 3% threshold accuracy for UV and OV, ensures tight supervision of bus voltages, eliminating the need for supervisor circuitry. Fault flag output (FLT) is provided for system status monitoring and down stream load control.

For hot-plug-in boards, TPS25921 provides in-rush current control and programmable output ramp-rate. Output ramp rate is programmable using a capacitor at soft-start (SS) pin, for maximum design flexibility.

The TPS25921 is a compact, feature rich eFuse with a full suite of protection functions. The wide operating voltage allows control of many popular DC buses. The precise ±2% current limit, at room temperature, provides excellent accuracy making the TPS25921 well suited for many system protection applications.

Load, source and device protection are provided with multiple programmable features including overcurrent, overvoltage and undervoltage. 3% threshold accuracy for UV and OV, ensures tight supervision of bus voltages, eliminating the need for supervisor circuitry. Fault flag output (FLT) is provided for system status monitoring and down stream load control.

For hot-plug-in boards, TPS25921 provides in-rush current control and programmable output ramp-rate. Output ramp rate is programmable using a capacitor at soft-start (SS) pin, for maximum design flexibility.

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技术文档

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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 TPS25921x 4.5V - 18V eFuse with Precise Current Limit and Over Voltage Protection 数据表 (Rev. C) PDF | HTML 2015-11-11
证书 TPS25921 CB Test Certificate IEC 62368-1 2021-7-9
功能安全信息 eFuse: Safety Certification and why it Matters 2020-3-18
证书 TPS25921x UL Certificate of Compliance IEC 62368-1 2020-1-17
电子书 11 Ways to Protect Your Power Path 2019-7-3
应用手册 Basics of eFuses (Rev. A) 2018-4-5
技术文章 How adding an eFuse will protect your brand’s reputation PDF | HTML 2017-6-21

设计与开发

如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。

评估板

TPS25921EVM-637 — 具有高精度电流限制功能的 TPS25921EVM-637 4.5-18V eFuse 评估模块

TPS25921xD 电子保险丝是采用小型封装的高度集成电路保护和电源管理解决方案。这些器件使用很少的外部组件,但可提供多种保护模式,能够非常有效地抵御过载、短路、电压浪涌和过多浪涌电流。电流限制水平可通过单个外部电阻器进行设置,且室温下电流限值的设定精度可达 ±2%。

此外,这些器件可切断输入总线,防止系统因过压事件而受到损坏(根据系统需要,用户可使用简单的电阻器来自行配置此功能)。

用户指南: PDF
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仿真模型

TPS25921A Unencrypted PSpice Transient Model Package (Rev. B)

SLVMAE6B.ZIP (95 KB) - PSpice 模型
支持的产品和硬件
计算工具

SLUC573 — TPS25921EVM-637 Design Calculator Tool

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计算工具

TVS-RECOMMENDATION-CALC — TVS diode recommendation tool

This tool suggests suitable TVS for given system parameters and abs max voltage rating of the device.
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参考设计

TIDA-00331 — 精密功率限制解决方案

这种解决方案将所提供的功率限制为最大 15W,确保其在人机交互 (HMI) 端口中符合 IEC60730 标准,从而使终端设备非常容易满足安全法规。
此设计使用 TI 的 TPS25921AD 来监测流经连接系统的电压和电流,并将功率输出控制在 2% 以内。  除了功率限制功能外,TPS25921AD 还可提供过压、欠压、浪涌电流和短路保护。

支持的产品和硬件
参考设计

TIDA-00420 — 基于 ADC、数字隔离、宽输入、16 通道、交流/直流二进制输入参考设计

此参考设计展示了一种经过成本优化、基于可扩展 ADC 且具有增强型隔离功能的交流/直流二进制输入模块 (BIM) 架构。10 位或 12 位 SAR ADC 的 16 个通道用于感应多个二进制输入。运算放大器除了使每通道成本保持较低之外,还为每个输入提供了出色的信号调节。数字隔离器(基础型或增强型)用于隔离主机 MCU 或处理器。支持对温度、湿度和磁场的测量以用于诊断。具有可配置输出的增强型隔离直流/直流电源可为二进制模块提供所需的电源。

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封装 引脚 CAD 符号、封装和 3D 模型
SOIC (D) 8 Ultra Librarian

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