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  • TPS2597xx 具有精确电流监视器和瞬态过流消隐功能的 2.7V 至 23V，7A，9.8mΩ 电子保险丝

    • ZHCSOF8D November   2021  – May 2025 TPS2597

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  • TPS2597xx 具有精确电流监视器和瞬态过流消隐功能的 2.7V 至 23V，7A，9.8mΩ 电子保险丝
  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Undervoltage Lockout (UVLO and UVP)
      2. 7.3.2 Overvoltage Lockout (OVLO)
      3. 7.3.3 Overvoltage Clamp (OVC)
      4. 7.3.4 Inrush Current, Overcurrent, and Short Circuit Protection
        1. 7.3.4.1 Slew Rate (dVdt) and Inrush Current Control
        2. 7.3.4.2 Circuit-Breaker
        3. 7.3.4.3 Active Current Limiting
        4. 7.3.4.4 Short-Circuit Protection
      5. 7.3.5 Analog Load Current Monitor
      6. 7.3.6 Overtemperature Protection (OTP)
      7. 7.3.7 Fault Response and Indication (FLT)
      8. 7.3.8 Power-Good Indication (PG)
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Single Device, Self-Controlled
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Device Selection
        2. 8.2.2.2 Setting Undervoltage and Overvoltage Thresholds
        3. 8.2.2.3 Setting Output Voltage Rise Time (tR)
        4. 8.2.2.4 Setting Power-Good Assertion Threshold
        5. 8.2.2.5 Setting Overcurrent Threshold (ILIM)
        6. 8.2.2.6 Setting Overcurrent Blanking Interval (tITIMER)
      3. 8.2.3 Application Curves
    3. 8.3 Parallel Operation
    4. 8.4 Power Supply Recommendations
      1. 8.4.1 Transient Protection
      2. 8.4.2 Output Short-Circuit Measurements
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 第三方产品免责声明
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 接收文档更新通知
    4. 9.4 支持资源
    5. 9.5 Trademarks
    6. 9.6 静电放电警告
    7. 9.7 术语表
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
  13. 重要声明
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Data Sheet

TPS2597xx 具有精确电流监视器和瞬态过流消隐功能的 2.7V 至 23V，7A，9.8mΩ 电子保险丝

本资源的原文使用英文撰写。 为方便起见，TI 提供了译文；由于翻译过程中可能使用了自动化工具，TI 不保证译文的准确性。 为确认准确性，请务必访问 ti.com 参考最新的英文版本（控制文档）。

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1 特性

  • 宽工作输入电压范围：2.7V 至 23V
    • 绝对最大值为 28V
  • 具有低导通电阻的集成 FET：RON = 9.8mΩ（典型值）
  • 快速过压保护
    • 过压钳位 (OVC)，可通过引脚选择阈值（3.89V、5.76V 和 13.88V），响应时间为 5μs（典型值），或
    • 可调节过压锁定 (OVLO)，响应时间为 1.2μs（典型值）
  • 过流保护，具有负载电流监控器输出 (ILM)
    • 主动电流限制或断路器选项
    • 可调节阈值 (ILIM) 0.87A 至 7.7A
      • ILIM > 1.74 A 时精度为 ±10%
    • 可调瞬态消隐计时器 (ITIMER)，支持高达 2 × ILIM 的峰值电流
    • 输出负载电流监控精度：±8%（最大值）
  • 通过快速跳变响应实现短路保护
    • 550ns（典型值）响应时间
    • 可调节 (2 × ILIM) 和固定阈值
  • 具有可调节欠压锁定阈值 (UVLO) 的高电平有效使能输入
  • 可调节的输出压摆率控制 (dVdt)
  • 过热保护
  • 数字输出
    • 故障指示 (FLT) 或
    • 具有可调节阈值 (PGTH) 的电源正常状态指示 (PG)
  • UL 2367 认证
    • 文件编号 E339631
    • RILM ≥ 750Ω
  • 获得 IEC 62368-1 CB 认证
  • 小尺寸：QFN 2mm × 2mm，0.45mm 间距

2 应用

  • 服务器、PC 主板和插件卡

  • 企业级存储 - RAID/HBA/SAN/eSSD

  • 患者监护仪

  • 电器和电动工具
  • 零售销售点终端
  • 智能手机和平板电脑

3 说明

TPS2597xx 系列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。此类器件只需很少的外部元件即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。

可以使用单个外部电容器来调节输出压摆率和浪涌电流。通过将输出钳制到安全的固定最大电压（可通过引脚选择）或在输入超过可调过压阈值时切断输出，可以保护负载免受输入过压情况的影响。此类器件通过主动限制电流或断开电路来响应输出过载。用户可以调节输出电流限值阈值以及瞬态过流消隐计时器。电流限值控制引脚还用作模拟负载电流监控器。

此类器件采用 2mm × 2mm 10 引脚 HotRod™ QFN 封装，旨在改善热性能并减小系统尺寸。

此类器件的额定工作结温范围为 –40°C 至 +125°C。

封装信息
器件型号封装(1)封装尺寸(2)
TPS2597xxRPWRPW（QFN，10）2.00mm × 2.00mm
(1) 如需了解所有可用封装，请参阅数据表末尾的可订购产品附录。
(2) 封装尺寸（长 × 宽）为标称值，并包括引脚（如适用）。
TPS2597 简化版原理图简化版原理图

4 Device Comparison Table

PART NUMBER OVERVOLTAGE RESPONSE OVERCURRENT RESPONSE PG

and PGTH

 FLT RESPONSE TO FAULT

TPS25970ARPW

Adjustable OVLO

Active Current Limit

N

Y

Auto-Retry

TPS25970LRPW

Latch-Off

TPS25972ARPW

Pin Selectable OVC
(3.89 V/5.76 V/13.88 V)

Y

N

Auto-Retry

TPS25972LRPW

Latch-Off

TPS25974ARPW

Adjustable OVLO

Circuit Breaker

Auto-Retry

TPS25974LRPW

Latch-Off

5 Pin Configuration and Functions

TPS2597 TPS2597xx RPW Package 10-Pin QFN (Top View) Figure 5-1 TPS2597xx RPW Package 10-Pin QFN (Top View)
Table 5-1 Pin Functions
PIN TYPE DESCRIPTION
NAME NO.
EN/UVLO

1

 Analog Input Active high enable for the device. A resistor divider on this pin from input supply to GND can be used to adjust the undervoltage lockout threshold. Do not leave floating. Refer to Undervoltage Lockout (UVLO and UVP) for details.

OVLO

2

 Analog Input TPS25970x and TPS25974x: A resistor divider on this pin from supply to GND can be used to adjust the overvoltage lockout threshold. This pin can also be used as an active low enable for the device. Do not leave floating. Refer to Overvoltage Lockout (OVLO) for details.

OVCSEL

 Analog Input TPS25972x: Overvoltage clamp threshold select pin. Refer to Overvoltage Clamp (OVC) for details.

PG

3

 Digital Output TPS25972x and TPS25974x: Power-good indication. This is an open-drain signal, which is asserted high when the internal powerpath is fully turned ON and the PGTH input exceeds a certain threshold. Refer to Power Good Indication (PG) for more details.

DNC

 Digital Output TPS25970x: Can be left floating

FLT

4

 Digital Output TPS25970x: Active low fault event indicator. This pin is an open-drain signal that is pulled low when a fault is detected. Refer to Fault Response and Indication (FLT) for more details.

PGTH

 Analog Input TPS25972x and TPS25974x: Power-good threshold. Refer to Power Good Indication (PG) for more details.

IN

5

Power

 Power input

OUT

6

Power

 Power output

DVDT

7

 Analog Output A capacitor from this pin to GND sets the output turn on slew rate. Leave this pin floating for the fastest turn on slew rate. Refer to Slew Rate (dVdt) and Inrush Current Control for details.

GND

8

Ground

 This pin is the ground reference for all internal circuits and must be connected to system GND.

ILM

9

 Analog Output This pin is a dual function pin used to limit and monitor the output current. An external resistor from this pin to GND sets the output current limit threshold during start-up as well as steady state. The pin voltage can also be used as analog output load current monitor signal. Do not leave floating. Refer to Circuit-Breaker or Active Current Limiting for more details.

ITIMER

10

 Analog Output A capacitor from this pin to GND sets the overcurrent blanking interval during which the output current can temporarily exceed set current limit (but lower than fast-trip threshold) before the device overcurrent response takes action. Leave this pin open for the fastest response to overcurrent events. Refer to Circuit-Breaker or Active Current Limiting for more details.

6 Specifications

 
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