ZHCSMX7A August   2021  – December 2021 TPS92519-Q1

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 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 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Buck Converter Switching Operation
      2. 7.3.2  Switching Frequency and Adaptive On-Time Control
      3. 7.3.3  Minimum On-Time, Off-Time, and Inductor Ripple
      4. 7.3.4  Enable
      5. 7.3.5  LED Current Regulation and Error Amplifier
      6. 7.3.6  Start-up Sequence
      7. 7.3.7  Analog Dimming and Forced Continuous Conduction Mode
      8. 7.3.8  External PWM Dimming and Input Undervoltage Lockout (UVLO)
      9. 7.3.9  Shunt FET Dimming or Matrix Beam Application
      10. 7.3.10 Bias Supply
      11. 7.3.11 Bootstrap Supply
      12. 7.3.12 Faults and Diagnostics
      13. 7.3.13 Output Short Circuit Fault
      14. 7.3.14 Output Open Circuit Fault
      15. 7.3.15 Parallel Operation
    4. 7.4 Device Functional Modes
      1. 7.4.1 Power On Reset (POR)
      2. 7.4.2 Run Mode
      3. 7.4.3 Sleep Mode
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1  Duty Cycle Consideration
      2. 8.1.2  Switching Frequency Selection
      3. 8.1.3  LED Current Set Point
      4. 8.1.4  Inductor Selection
      5. 8.1.5  Output Capacitor Selection
      6. 8.1.6  Input Capacitor Selection
      7. 8.1.7  Bootstrap Capacitor Selection
      8. 8.1.8  Compensation Capacitor Selection
      9. 8.1.9  Input Undervoltage Protection
      10. 8.1.10 CSN Protection Diode
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Calculating Duty Cycle
        2. 8.2.2.2 Calculating Minimum On-Time and Off-Time
        3. 8.2.2.3 Minimum Switching Frequency
        4. 8.2.2.4 LED Current Set Point
        5. 8.2.2.5 Inductor Selection
        6. 8.2.2.6 Output Capacitor Selection
        7. 8.2.2.7 Bootstrap Capacitor Selection
        8. 8.2.2.8 Compensation Capacitor Selection
        9. 8.2.2.9 PWM Dimming and Input Voltage Protection
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Compact Layout for EMI Reduction
        1. 10.1.1.1 Ground Plane
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 支持资源
    4. 11.4 Trademarks
    5. 11.5 术语表
  12. 12Mechanical, Packaging, and Orderable Information

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6.6 Typical Characteristics

TA = TJ = 25°C, V5D = V5A = 5 V, VIN = 24 V, VUDIMx = 5 V, CV5D = CV5A = 4.7 µF CBSTx = 0.1 µF, CCOMPx = 1 nF, RCSx = 100 mΩ, no load on SWx, FLTx pin floating (unless otherwise noted)

VCSN = 3 V
Figure 6-1 V(CSP–CSN) Current Sense Threshold vs Temperature
VIADJ =0 V
Figure 6-3 CSN Source Current vs CSN Voltage
Figure 6-5 V5D,A POR Threshold vs Temperature
Figure 6-7 High Side MOSFET On Resistance vs Temperature
Figure 6-9 Bootstrap UVLO Hysteresis vs Temperature
Figure 6-11 Low-Side MOSFET On Resistance vs Temperature
Figure 6-13 IADJ Internal Limit vs Temperature
Figure 6-15 Minimum Off-time vs Temperature
Figure 6-17 UDIM Dropout Detection Threshold vs Temperature
Figure 6-19 COMP Leakage Current vs Temperature
VCSN = 3 V VIN = 60 V
Figure 6-2 V(CSP–CSN) Current Sense Error vs IADJ Count
L = 68 µH VIN = 60 V
Figure 6-4 Minimum Ripple Voltage vs Average Inductor Current
Figure 6-6 V5D Sleep Current vs Temperature
Figure 6-8 Bootstrap UVLO Threshold vs Temperature
Figure 6-10 High-Side Current Limit Threshold vs Temperature
Figure 6-12 Low-Side Sinking Current Limit Threshold vs Temperature
Figure 6-14 Minimum On-time vs Temperature
Figure 6-16 UDIM Undervoltage Lockout Threshold vs Temperature
Figure 6-18 COMP Overvoltage Detection Threshold vs Temperature
VFPIN = 5 V VIN = 60 V
Figure 6-20 Efficiency vs LED Current