ZHCS155C March   2011  – November 2023 TPS40170

PRODUCTION DATA  

  1.   1
  2. 特性
  3. 应用
  4. 说明
  5. Pin Configuration and Functions
  6. Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 Handling Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  LDO Linear Regulators and Enable
      2. 6.3.2  Input Undervoltage Lockout (UVLO)
        1. 6.3.2.1 Equations for Programming the Input UVLO:
      3. 6.3.3  Oscillator and Voltage Feed-Forward
        1. 6.3.3.1 Calculating the Timing Resistance (RRT)
      4. 6.3.4  Overcurrent Protection and Short-Circuit Protection (OCP and SCP)
      5. 6.3.5  Soft-Start and Fault-Logic
        1. 6.3.5.1 Soft Start During Overcurrent Fault
        2. 6.3.5.2 Equations for Soft Start and Restart Time
      6. 6.3.6  Overtemperature Fault
      7. 6.3.7  Tracking
      8. 6.3.8  Adaptive Drivers
      9. 6.3.9  Start-Up into Pre-Biased Output
      10. 6.3.10 Power Good (PGOOD)
      11. 6.3.11 PGND and AGND
    4. 6.4 Device Functional Modes
      1. 6.4.1 Frequency Synchronization
      2. 6.4.2 Operation Near Minimum VIN (VVIN ≤ 4.5 V)
  8. Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Bootstrap Resistor
      2. 7.1.2 SW Node Snubber Capacitor
      3. 7.1.3 Input Resistor
      4. 7.1.4 LDRV Gate Capacitor
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1  Custom Design with WEBENCH® Tools
        2. 7.2.2.2  List of Materials
        3. 7.2.2.3  Select a Switching Frequency
        4. 7.2.2.4  Inductor Selection (L1)
        5. 7.2.2.5  Output Capacitor Selection (C9)
        6. 7.2.2.6  Peak Current Rating of Inductor
        7. 7.2.2.7  Input Capacitor Selection (C1, C6)
        8. 7.2.2.8  MOSFET Switch Selection (Q1, Q2)
        9. 7.2.2.9  Timing Resistor (R7)
        10. 7.2.2.10 UVLO Programming Resistors (R2, R6)
        11. 7.2.2.11 Boot-Strap Capacitor (C7)
        12. 7.2.2.12 VIN Bypass Capacitor (C18)
        13. 7.2.2.13 VBP Bypass Capacitor (C19)
        14. 7.2.2.14 VDD Bypass Capacitor (C16)
        15. 7.2.2.15 SS Timing Capacitor (C15)
        16. 7.2.2.16 ILIM Resistor (R9, C17)
        17. 7.2.2.17 SCP Multiplier Selection (R5)
        18. 7.2.2.18 Feedback Divider (R10, R11)
        19. 7.2.2.19 Compensation: (R4, R13, C13, C14, C21)
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 第三方米6体育平台手机版_好二三四免责声明
      2. 8.1.2 Development Support
        1. 8.1.2.1 Custom Design with WEBENCH® Tools
      3. 8.1.3 Related Devices
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 接收文档更新通知
    4. 8.4 支持资源
    5. 8.5 Trademarks
    6. 8.6 静电放电警告
    7. 8.7 术语表
  10. Revision History
  11. 10Mechanical, Packaging, and Orderable Information

说明

TPS40170 是一款功能齐全的同步 PWM 降压控制器,工作输入电压介于 4.5V 至 60V 之间,并针对高功率密度、高可靠性的直流/直流转换器应用进行了优化。该控制器通过输入电压前馈补偿实现电压模式控制,可在输入电压变化时即时响应。此器件具有 100kHz 至 600kHz 的可编程开关频率。

TPS40170 具有整套系统保护和监控特性,例如可编程欠压锁定 (UVLO)、通过检测低侧 FET 实现的可编程过流保护 (OCP)、通过检测高侧 FET 实现的可选短路保护 (SCP) 和热关断。通过 ENABLE 引脚,系统能够在低电流(典型值 1µA)模式下进行关断。控制器支持预偏置输出,提供开漏电源正常 (PGOOD) 信号,并具有闭环软启动、输出电压跟踪以及自适应死区时间控制功能。

TPS40170 可通过 1% 确保精度实现准确的输出电压调节。此外,该控制器还采用新型双向同步方案,即一个控制器作为主要控制器,其他下游控制器作为辅助控制器,辅助控制器可与主要控制器同相或 180° 异相同步。辅助控制器可在自由运行开关频率的 ±30% 范围内与外部时钟同步。

新款米6体育平台手机版_好二三四(LM5145LM5146)具有 BOM 成本低、效率高、设计尺寸小等诸多特性。

封装信息
器件型号 封装(1) 封装尺寸(2)
TPS40170 RGY(VQFN,20) 4.50mm × 3.50mm
有关所有可选封装,请参阅 节 10
封装尺寸(长 × 宽)为标称值,并包括引脚(如适用)。
GUID-A1E047A8-8EAA-4851-BDB6-A44E9BCA14D1-low.gif简化版应用
GUID-5431410C-DBB4-4CB6-A6C0-747A14538EEC-low.gif效率与负载电流之间的关系