首頁 電源管理 電源保護開關與控制器 eFuse(整合式熱插拔)

TPS25921A

現行

具有自動重試故障反應功能的 4.5-V 至 18-V、90mΩ、0.4-1.6A eFuse

產品詳細資料

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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技術文件

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 TPS25921x 4.5V - 18V eFuse with Precise Current Limit and Over Voltage Protection datasheet (Rev. C) PDF | HTML 2015/11/11
證書 TPS25921 CB Test Certificate IEC 62368-1 2021/7/9
功能安全資訊 eFuse: Safety Certification and why it Matters 2020/3/18
證書 TPS25921x UL Certificate of Compliance IEC 62368-1 2020/1/17
電子書 11 Ways to Protect Your Power Path 2019/7/3
應用說明 Basics of eFuses (Rev. A) 2018/4/5
技術文章 How adding an eFuse will protect your brand’s reputation PDF | HTML 2017/6/21

設計與開發

如需其他條款或必要資源,請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

TPS25921EVM-637 — 具有精密電流限制的 TPS25921EVM-637 4.5-18V eFuse 評估模組

TPS25921xD eFuse 是採用小型封裝的高度積體電路保護和電源管理解決方案。這些裝置只使用少量外部元件,並提供多種保護模式,並可針對過載、短路、電壓突波及湧浪電流過大,提供穩固的防護。電流限制等級可透過單一外部電阻器設定,且電流限制設定在室溫下的精準準確度為 ±2%。

此外,這些裝置也會切斷輸入匯流排並保護系統免受過電壓事件影響,使用者可根據系統需求以簡易電阻器進行配置。

使用指南: PDF
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模擬型號

TPS25921A Unencrypted PSpice Transient Model Package (Rev. B)

SLVMAE6B.ZIP (95 KB) - PSpice 模型
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計算工具

SLUC573 — TPS25921EVM-637 Design Calculator Tool

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計算工具

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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參考設計

TIDA-00331 — 精密功率限制解決方案

此解決方案將傳輸功率限制在最高 15W,以確保人機交互作用 (HMI) 連接埠符合 IEC60730 規範,讓終端設備能夠輕鬆滿足安全法規。
此設計使用 TI 的 TPS25921AD 監控流經連接系統的電壓和電流,並將功率輸出控制在 2% 以內。  除了功率限制功能外,TPS25921AD 還可防止過電壓、欠電壓、湧入電流及短路。

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參考設計

TIDA-00420 — ADC 架構、數位隔離、廣泛輸入、16 通道、AC/DC 二進位輸入參考設計

此參考設計展現具強化型隔離的成本最佳化、可擴充 ADC 架構 AC/DC 二進位輸入模組 (BIM) 架構。10 位元或 12 位元 SAR ADC 的 16 通道,用於感測多個二進位輸入。運算放大器除了維持低每頻道成本外,也可為各輸入提供最佳訊號調節。數位隔離器 (基本型或強化型) 可用於隔離主機 MCU 或處理器。提供可測量溫度,濕度和磁場以進行診斷的設備。具可配置輸出的強化型隔離 DC/DC 電源供應器,可提供二進位模組所需的電源。

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SOIC (D) 8 Ultra Librarian

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