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TPS25940

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具有反向电流阻断功能和 DevSleep 模式的 2.7V 至 18V、42mΩ、0.6A 至 5.2A 电子保险丝

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TPS25940

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产品详情

Vabsmax_cont (V) 20 Vin (max) (V) 18 Vin (min) (V) 2.7 Current limit (max) (A) 5.2 Current limit (min) (A) 0.6 Features Adjustable current limit, Adjustable soft start, Current monitoring, Fault output, Overcurrent protection, Overvoltage protection, Power good signal, Reverse current blocking always, Short-circuit protection, Thermal shutdown UL recognition UL2367, UL60950 Overcurrent response Current limiting Fault response Auto-retry, Latch-off Ron (typ) (mΩ) 42 Overvoltage response Cut-off Rating Catalog Soft start Adjustable Quiescent current (Iq) (typ) (A) 0.000199 Quiescent current (Iq) (max) (A) 0.00026 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) 2.7 Current limit (max) (A) 5.2 Current limit (min) (A) 0.6 Features Adjustable current limit, Adjustable soft start, Current monitoring, Fault output, Overcurrent protection, Overvoltage protection, Power good signal, Reverse current blocking always, Short-circuit protection, Thermal shutdown UL recognition UL2367, UL60950 Overcurrent response Current limiting Fault response Auto-retry, Latch-off Ron (typ) (mΩ) 42 Overvoltage response Cut-off Rating Catalog Soft start Adjustable Quiescent current (Iq) (typ) (A) 0.000199 Quiescent current (Iq) (max) (A) 0.00026 Device type eFuses and hot swap controllers Operating temperature range (°C) -40 to 85
WQFN (RVC) 20 12 mm² (4 mm × 3 mm)
  • 2.7 V – 18 V Operating Voltage, 20 V (Max)
  • 42 mΩ RON (Typical)
  • 0.6 A to 5.3 A Adjustable Current Limit (±8%)
  • IMON Current Indicator Output (±8%)
  • 200 µA Operating IQ (Typical)
  • 95 µA DevSleep Mode IQ (Typical)
  • 15 µA Disabled IQ (Typical)
  • ±2% Overvoltage, Undervoltage Threshold
  • Reverse Current Blocking
  • 1 µs Reverse Voltage Shutoff
  • Programmable dVo/dt Control
  • Power Good and Fault Outputs
  • –40°C to 125°C Junction Temperature Range
  • UL 2367 Recognized
    • File No. 169910
    • RILIM ≥ 20 kΩ (4.81 A max)
  • UL60950 - Safe during Single Point Failure Test
    • Open/Short ILIM detection
  • 2.7 V – 18 V Operating Voltage, 20 V (Max)
  • 42 mΩ RON (Typical)
  • 0.6 A to 5.3 A Adjustable Current Limit (±8%)
  • IMON Current Indicator Output (±8%)
  • 200 µA Operating IQ (Typical)
  • 95 µA DevSleep Mode IQ (Typical)
  • 15 µA Disabled IQ (Typical)
  • ±2% Overvoltage, Undervoltage Threshold
  • Reverse Current Blocking
  • 1 µs Reverse Voltage Shutoff
  • Programmable dVo/dt Control
  • Power Good and Fault Outputs
  • –40°C to 125°C Junction Temperature Range
  • UL 2367 Recognized
    • File No. 169910
    • RILIM ≥ 20 kΩ (4.81 A max)
  • UL60950 - Safe during Single Point Failure Test
    • Open/Short ILIM detection

The TPS25940 eFuse Power Switch is a compact, feature rich power management device with a full suite of protection functions, including a low power DevSleep™ mode that supports compliance with the SATA™ Device Sleep standard. The wide operating range allows control of many popular DC bus voltages. Integrated back to back FETs provide bidirectional current control making the device well suited for systems with load side holdup energy that must not drain back to a failed supply bus.

Load, source and device protection are provided with many programmable features including overcurrent, dVo/dt ramp and overvoltage, undervoltage thresholds. For system status monitoring and downstream load control, the device provides PGOOD, FLT and precise current monitor output. Precise programmable undervoltage, overvoltage thresholds and the low IQ DevSleep mode simplify SSD power management design.

The TPS25940 monitors V(IN) and V(OUT) to provide true reverse current blocking when V(IN) < (V(OUT) - 10 mV). This function supports swift changeover to a boosted voltage energy storage element in systems where backup voltage is greater than bus voltage.

The TPS25940 eFuse Power Switch is a compact, feature rich power management device with a full suite of protection functions, including a low power DevSleep™ mode that supports compliance with the SATA™ Device Sleep standard. The wide operating range allows control of many popular DC bus voltages. Integrated back to back FETs provide bidirectional current control making the device well suited for systems with load side holdup energy that must not drain back to a failed supply bus.

Load, source and device protection are provided with many programmable features including overcurrent, dVo/dt ramp and overvoltage, undervoltage thresholds. For system status monitoring and downstream load control, the device provides PGOOD, FLT and precise current monitor output. Precise programmable undervoltage, overvoltage thresholds and the low IQ DevSleep mode simplify SSD power management design.

The TPS25940 monitors V(IN) and V(OUT) to provide true reverse current blocking when V(IN) < (V(OUT) - 10 mV). This function supports swift changeover to a boosted voltage energy storage element in systems where backup voltage is greater than bus voltage.
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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 TPS25940x 2.7 – 18V eFuse with True Reverse Blocking and DevSleep Support for SSDs 数据表 (Rev. A) PDF | HTML 2015-3-26
证书 TPS25940 CB Test Certificate IEC 62368-1 2021-7-8
证书 TPS2594x UL Certificate of Compliance UL 2367 2020-4-10
功能安全信息 eFuse: Safety Certification and why it Matters 2020-3-18
证书 TPS25940 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 Minimizing System Down-time with Smart eFuses 2019-6-12
应用手册 Basics of eFuses (Rev. A) 2018-4-5
应用手册 Charging Super Capacitor With eFuse 2017-8-8
技术文章 How adding an eFuse will protect your brand’s reputation PDF | HTML 2017-6-21
应用手册 Power Multiplexing Using Load Switches and eFuses (Rev. A) 2017-6-20
应用手册 Achieve 20-A Circuit Protection and Space Efficiency Using Paralleled eFuses 2016-11-3
技术文章 eFuses: clamping and cutoff and auto retry, oh my! – part 2/3 PDF | HTML 2016-5-26
技术文章 eFuses: clamping and cutoff and auto retry, oh my! – part 1/3 PDF | HTML 2016-5-10

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

TPS25940EVM-635 — TPS25940x 评估模块

TPS25940XEVM-635 是在 2.7V 至 18V 电压下运行的电子保险丝（带 DEVSLP 的限流器），具有集成型背对背 FET，提供可编程的欠压、过压、反向电压、过流和浪涌电流保护特性。它还包含模拟电流监控功能，并采用 3mm x 4mm 的小型 20 引脚 QFN 封装。在热插拔期间，该器件会限制浪涌电流，且可通过单个电容器在 dVdT 引脚处对输出斜升速率进行编程。

用户指南: PDF
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仿真模型

TPS25940A Unencrypted PSpice Transient Model Package (Rev. C)

SLVMAB0C.ZIP (72 KB) - PSpice 模型
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仿真模型

TPS25940L Unencrypted PSpice Transient Model Package (Rev. C)

SLVMAB1C.ZIP (72 KB) - PSpice 模型
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计算工具

SLVC571 — TPS2594x Design Calculation 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.
支持的产品和硬件
参考设计

TIDA-00304 — 最后时刻保持供电的能量存储解决方案

此解决方案可为 SSD 等系统存储并提供“最后关头”的能量。这些系统在断电后仍需短暂维持功能，以便以受控方式关机。通过将维持能量存储在高于总线电压的水平，电容容量可减少多达 80%，从而降低解决方案的尺寸和成本，同时提高可靠性。
通常需要一个复杂的电子电路来提升输入电压，在断电期间将其与降压输入端进行多路复用，并将其降压至 3.3V 或 5V 以供负载使用。


此参考设计在输入侧使用 TI 的 TPS25942 来控制浪涌，防止过压、欠压和短路，并防止储存的能量流回短路的输入总线。如果输入电源为 5V，升压转换器将电容器组充电至 12V，如果输入电源为 12V，则将电容器组充电至 18V。当 (...)

支持的产品和硬件
参考设计

TIDA-00429 — 具有 DevSleep SATA 接口的电子保险丝电源开关

TPS25940A 提供专用的 DevSleep 接口端子 (DEVSLP)，可强制器件进入低功耗模式。DEVSLP 引脚与主机控制器发出的标准硬件信号兼容。拉至高电平时，会将器件置于低功耗 DevSleep 模式。在此模式下，TPS25940A 的静态电流消耗限制为 95µA（典型值）。TPS25940A 的 DevSleep 功能克服的主要挑战在于：即使器件被强制进入 DevSleep 模式，也能保持器件运行，输出电压仍保持有效状态，且过载电流限制设置为 I(DEVSLP(LIM)。此外，即使在 DevSleep 模式下，所有其他保护功能也仍处于有效状态，确保系统的安全。

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封装 引脚 CAD 符号、封装和 3D 模型
WQFN (RVC) 20 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

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