ZHCSTJ5A October   2023  – February 2024 TPS274C65CP

PRODUCTION DATA  

  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 Switching Characteristics
    7. 6.7 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Pin Diagrams
      2. 8.3.2 Programmable Current Limit
      3. 8.3.3 Protection Mechanisms
        1. 8.3.3.1 Over-current Protection
        2. 8.3.3.2 Short-Circuit Protection
          1. 8.3.3.2.1 VS During Short-to-Ground
        3. 8.3.3.3 Thermal Shutdown Behavior
        4. 8.3.3.4 Inductive-Load Switching-Off Clamp
        5. 8.3.3.5 Inductive Load Demagnetization
        6. 8.3.3.6 Thermal Shutdown
        7. 8.3.3.7 Undervoltage Protection on VS (UVP)
        8. 8.3.3.8 Undervoltage Lockout on Low Voltage Supply (VDD_UVLO)
        9. 8.3.3.9 Power-Up and Power-Down Behavior
      4. 8.3.4 Diagnostic Mechanisms
        1. 8.3.4.1 Fault Indication
        2. 8.3.4.2 Short-to-Battery and Open-Load Detection
    4. 8.4 Device Functional Modes
      1. 8.4.1 Off
      2. 8.4.2 Active
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 IEC 61000-4-5 Surge
        2. 9.2.2.2 Loss of GND
        3. 9.2.2.3 Paralleling Channels
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 接收文档更新通知
    3. 10.3 支持资源
    4. 10.4 Trademarks
    5. 10.5 静电放电警告
    6. 10.6 术语表
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

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8.3.2 Programmable Current Limit

The TPS274C65CP integrates an adjustable current limit feature. With external resistor at ILIMCFG pin, the current limit of the device can be adjusted. When the overload or short-circuit situation happens, the device clamps the current at preset current limit level.

A lower current limit lowers fault energy and current during a load failure event such as a short-circuit or a partial load failure. By lowering fault energy and current, the overall system improves through:

  • Reduced size and cost in current carrying components such as PCB traces and module connectors
  • Less disturbance at the power supply (VS pin) during a short circuit event
  • Less additional budget for the power supply to account for overload currents in one channel or more
  • Improved protection of the downstream load
Table 8-1 ILIMCFG Table for TPS274C65CP

Resistor Value (kΩ)(1)

Typical ILIM Threshold (A)

13.3

0.25

17.8

0.4

23.7

0.56

31.6

0.72

44.2

1

59

1.25

78.7

1.6

110

1.9
Table 8-2 ILIMCFG Table for TPS274C65CPH

Resistor Value (kΩ)(1)

Typical ILIM Threshold (A)

13.3

0.29

17.8

0.48

23.7

0.67

31.6

0.86

44.2

1.15

59

1.52

78.7

1.9

110

2.26
(1) The tolerance of the resistance is 1%.