ZHCSM06C december   2020  – may 2023 TPS272C45

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Revision History
  6. 5 Device Comparison Table
  7. 6 Pin Configuration and Functions
    1. 6.1 Recommended Connections for Unused Pins
  8. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 SNS Timing Characteristics
    7. 7.7 Switching Characteristics
    8. 7.8 Typical Characteristics
  9. 8 Parameter Measurement Information
  10. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Programmable Current Limit
        1. 9.3.1.1 Inrush Current Handling
        2. 9.3.1.2 Calculating RILIMx
        3. 9.3.1.3 Configuring ILIMx From an MCU
      2. 9.3.2 Low Power Dissipation
      3. 9.3.3 Protection Mechanisms
        1. 9.3.3.1 Short-Circuit Protection
          1. 9.3.3.1.1 VS During Short-to-Ground
        2. 9.3.3.2 Inductive Load Demagnetization
        3. 9.3.3.3 Thermal Shutdown
        4. 9.3.3.4 Undervoltage Lockout on VS (UVLO)
        5. 9.3.3.5 Undervoltage Lockout on Low Voltage Supply (VDD_UVLO)
        6. 9.3.3.6 Power-Up and Power-Down Behavior
        7. 9.3.3.7 Overvoltage Protection (OVPR)
      4. 9.3.4 Diagnostic Mechanisms
        1. 9.3.4.1 Current Sense
          1. 9.3.4.1.1 RSNS Value
            1. 9.3.4.1.1.1 Current Sense Output Filter
        2. 9.3.4.2 Fault Indication
          1. 9.3.4.2.1 Fault Event Diagrams
        3. 9.3.4.3 Short-to-Supply or Open-Load Detection
          1. 9.3.4.3.1 Detection With Switch Enabled
          2. 9.3.4.3.2 Detection With Switch Disabled
        4. 9.3.4.4 Current Sense Resistor Sharing
    4. 9.4 Device Functional Modes
      1. 9.4.1 Off
      2. 9.4.2 Diagnostic
      3. 9.4.3 Active
      4. 9.4.4 Fault
  11. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 IEC 61000-4-5 Surge
      2. 10.1.2 Inverse Current
      3. 10.1.3 Loss of GND
      4. 10.1.4 Paralleling Channels
      5. 10.1.5 Thermal Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 RILIM Calculation
        2. 10.2.2.2 Diagnostics
          1. 10.2.2.2.1 Selecting the RISNS Value
      3. 10.2.3 Application Curves
    3. 10.3 Power Supply Recommendations
    4. 10.4 Layout
      1. 10.4.1 Layout Guidelines
      2. 10.4.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 接收文档更新通知
    3. 11.3 支持资源
    4. 11.4 Trademarks
    5. 11.5 静电放电警告
    6. 11.6 术语表
  13. 12Mechanical, Packaging, and Orderable Information

7.7 Switching Characteristics

VS = 6 V to 36 V, TJ = -40°C to +125°C (unless otherwise noted)
Parameter Test Conditions Min Typ Max
Unit
tDR CH1 and CH2 Turnon delay time VS = 24 V, RL = 48 Ω 50% of EN to 10% of VOUT 10 15 25 µs
tDF CH1 and CH2 Turnoff delay time VS = 24 V, RL = 48 Ω 50% of EN to 90% of VOUT 25 35 50 µs
SR2R VOUTx rising slew rate VS = 24 V, 25% to 75% of VOUT,
RL = 48 Ω		 0.45 0.65 1.05 V/µs
SR2F VOUTx falling slew rate VS = 24 V, 75% to 25% of VOUT,
RL = 48 Ω		 0.5 0.9 1.4 V/µs
fmax Maximum PWM frequency 1 kHz
tON CH1 and CH2 Turnon time VS = 24 V, RL = 48 Ω  50% of EN to 90% of VOUT 25 40 65 µs
tOFF CH1 and CH2 Turnoff time VS = 24 V, RL = 48 Ω  50% of EN to 10% of VOUT 40 50 80 µs
tON - tOFF CH1 and CH2 Turnon and off matching 1ms ON time switch enable pulse VBB = 24 V, RL = 48 Ω –25 0 25 µs
ΔPWM CH1 and CH2 PWM accuracy - average load current 200-µs enable pulse, VS = 24 V, RL = 48 Ω 
F = fmax		 –12.5 0 12.5 %
ΔPWM CH1 and CH2 PWM accuracy - average load current 100-µs enable pulse, VS = 24 V, RL = 48 Ω 
F = fmax 		 –20 10 %
tON - tOFF CH1 Turnon and off timing matching 100-µs enable pulse, VS = 24 V, RL = 48 Ω 
F = fmax 		 –40 10 µs
EON Switching energy losses during turnon VS = 24 V, RL = 8 Ω, 1 ms pulse, VOUT from 10% to 90% of VS voltage 0.3 0.4 mJ
EOFF Switching energy losses during turnoff VS = 24 V, RL = 8 Ω, 1 ms pulse, VOUT from 10% to 90% of VS voltage 0.25 0.35 mJ
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