SLVSIQ0 May   2025 LP8865C-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4  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 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 Adaptive Off-Time Current Mode Control
      2. 7.3.2 Setting LED Current
      3. 7.3.3 Internal Soft Start
      4. 7.3.4 Dimming Mode
        1. 7.3.4.1 PWM dimming
        2. 7.3.4.2 Analog dimming
      5. 7.3.5 Fault Protection
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 LP8865CUQDGNRQ1 12V Input, 1A Output, 8-piece WLED Driver With Analog Dimming
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Inductor Selection
          2. 8.2.1.2.2 Input Capacitor Selection
          3. 8.2.1.2.3 Output Capacitor Selection
          4. 8.2.1.2.4 Sense Resistor Selection
          5. 8.2.1.2.5 Other External Components Selection
      2. 8.2.2 LP8865CYQDGNRQ1 24V Input, 0.5A Output, 4-piece WLED Driver With PWM Dimming
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 Inductor Selection
          2. 8.2.2.2.2 Input Capacitor Selection
          3. 8.2.2.2.3 Output Capacitor Selection
          4. 8.2.2.2.4 Sense Resistor Selection
          5. 8.2.2.2.5 Other External Components Selection
      3. 8.2.3 LP8865CWQDGNRQ1 24V Input, 2A Output, 4-piece WLED Driver With Analog Dimming
        1. 8.2.3.1 Design Requirements
        2. 8.2.3.2 Detailed Design Procedure
          1. 8.2.3.2.1 Inductor Selection
          2. 8.2.3.2.2 Input Capacitor Selection
          3. 8.2.3.2.3 Output Capacitor Selection
          4. 8.2.3.2.4 Sense Resistor Selection
          5. 8.2.3.2.5 Other External Components Selection
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.6 Typical Characteristics

VIN = 12 V, LED count = 12, L = 33 µH, FSW = 400 kHz, unless otherwise specified
LP8865C-Q1 PWM Duty Cycle vs. CSP-CSN Voltage at 20kHz PWMFigure 6-1 PWM Duty Cycle vs. CSP-CSN Voltage at 20kHz PWM
LP8865C-Q1 VIN UVLO Threshold vs. Junction TemperatureFigure 6-3 VIN UVLO Threshold vs. Junction Temperature
LP8865C-Q1 VIN Quiescent Current vs. Junction TemperatureFigure 6-5 VIN Quiescent Current vs. Junction Temperature
LP8865C-Q1 Boost PWM Dimming Efficiency at 13V Input Voltage, 0.5A Output Current, 20kHz PWMFigure 6-7 Boost PWM Dimming Efficiency at 13V Input Voltage, 0.5A Output Current, 20kHz PWM
LP8865C-Q1 Buck PWM Dimming Efficiency at 24V Input Voltage, 2A Output Current, 20kHz PWMFigure 6-9 Buck PWM Dimming Efficiency at 24V Input Voltage, 2A Output Current, 20kHz PWM
LP8865C-Q1 Analog Voltage vs. CSP-CSN VoltageFigure 6-2 Analog Voltage vs. CSP-CSN Voltage
LP8865C-Q1 Internal LDO Output vs. Junction TemperatureFigure 6-4 Internal LDO Output vs. Junction Temperature
LP8865C-Q1 Switching FET Rdson vs. Junction TemperatureFigure 6-6 Switching FET Rdson vs. Junction Temperature
LP8865C-Q1 Boost Analog Dimming Efficiency at 13V Input Voltage, 0.5A Output CurrentFigure 6-8 Boost Analog Dimming Efficiency at 13V Input Voltage, 0.5A Output Current
LP8865C-Q1 Buck Analog Dimming Efficiency at 24V Input Voltage, 2A Output CurrentFigure 6-10 Buck Analog Dimming Efficiency at 24V Input Voltage, 2A Output Current